1100mah 3.7v battery

Many electric vehicles are powered by lithium batterie that rely on cobalt—a scarce, expensive metal with high environmental and social costs. A team of researchers from Japanese and French universities has now developed a practical nickel-based electrode material that opens new avenues to cobalt-free batteries for electric vehicles.

The researchers detailed their findings in a study published in the journal Energy Storage Materials.

“There is an undeniable need for cobalt-free, high-energy electrode materials for lithium batterie,” said Naoaki Yabuuchi from Yokohama National University.

Lithium batterie can be recharged when lithium ions flow from a positively charged electrode to a negatively charged electrode. In most lithium batterie for portable electronics, the positive electrode contains lithium cobalt oxide (LiCoO2), a chemical compound that offers high stability and energy density.

However, the limited, fraught supply chain of cobalt creates a bottleneck for large-scale batteries, including the ones used in electric vehicles. In addition, cobalt extraction generates toxic waste that contaminates land, air, and water.

To address these issues, lithium nickel oxide (LiNiO2)—which is similar in structure to LiCoO2—often serves as a cobalt-free alternative for electrode material. However, key instability issues plague the compound, specifically a gradual loss of capacity at the high-voltage region, which is associated with nickel-ion migration.

To improve electrode reversibility, nickel ions have been partially substituted by other metal ions, including reintroduced cobalt ions as well as manganese, aluminum and magnesium, to create “nickel-enriched layered materials” to serve as positive electrode materials.

li-ion-14.8v-12ah-battery-lithium batterie

“So far, 10–20 percent cobalt ions were necessary for nickel-based electrode materials,” Yabuuchi said. This, according to Yabuuchi, is still too much, and a unified understanding of how metal substitution can improve the process has not yet been established.

To address this knowledge gap, Yabuuchi and collaborators dug deeper into the problematic phase transition. When lithium ions leave the cathode under the influence of an external field, nickel ions migrate to specific sites within the lithium layers. Although this process is reversible, the reversibility gradually degrades through continuous cycles until the capacity is completely lost—a phenomenon not seen in cobalt-ion migration.

Previous studies reported that tungsten doping in LiNiO2 is an efficient approach to suppressing the detrimental phase transitions at high-voltage regions. Yabuuchi and collaborators tested the hypothesis that heavy, expensive tungsten ions could be substituted with other elements, specifically phosphorous—a lighter, more abundant element.

After detailed analysis on LiNiO2 integrated with nanosized lithium phosphate (Li3PO4), the researchers observed that, under certain conditions, problematic nickel-ion migration was effectively suppressed due to repulsive electrostatic interaction from the extra nickel ions within the Li layers.

Moreover, from these findings, Li-deficient LiNiO2, Li0.975Ni1.025O2, with the extra nickel ions in Li layers, is also synthesized using a simple methodology without phosphorus integration. Results also showed how Li0.975Ni1.025O2 can effectively mitigate unfavorable nickel-ion migration, and deliver consistent reversibility without cobalt ions.

“These findings open a new direction to develop high performance and practical cobalt-free nickel-based electrode materials with an extremely simple and cost-effective methodology,” Yabuuchi said. “This material achieved the ultimate goal for high-performance nickel-based electrode materials.”

In future endeavors, the researchers plan to investigate the feasibility of a nickel-free material to support lithium-ion batteries.

More information: Itsuki Konuma et al, Unified understanding and mitigation of detrimental phase transition in cobalt-free LiNiO2, Energy Storage Materials (2024). DOI: 10.1016/j.ensm.2024.103200

If you have any question, please feel free to contact us:

  • Name: Dawn Zeng (Director)
  • E-mail address: sales@himaxelectronics.com
Himax Solar Battery Application scenarios

Energy Storage Systems (ESS) is a technology utilized to capture, store, and release energy for future use. These systems find applications across various sectors including power networks, transportation, industrial production, and personal devices. Energy storage systems play a pivotal role in enhancing energy utilization efficiency, balancing energy supply and demand, facilitating the integration of renewable energy, and addressing fluctuating demands in power systems.

There is a diverse range of energy storage system types, which include:

Battery storage systems

Such as lithium-ion batteries, lead-acid batteries, sodium-sulfur batteries, etc., used for storing electrical energy, widely applied in electric vehicles, portable electronic devices, and home energy storage systems.

Mechanical energy storage systems

Such as pumped hydro storage, flywheels, etc., which convert electrical energy into mechanical energy stored within devices and then convert it back to electrical energy when needed.

Thermal energy storage systems

Including hot water tanks, molten salt storage systems, etc., which capture and store heat energy for energy storage purposes.

Gas storage systems

Like Compressed Air Energy Storage (CAES) systems, which convert electrical energy into compressed air stored underground or in pressure vessels, later used to generate electricity.

Chemical storage systems

Such as water electrolysis for hydrogen production, electrochemical energy storage, etc., which utilize chemical reactions for energy storage and release.

energy storage system images

In energy storage systems, 5V batteries have various applications depending on battery type, capacity, and design requirements.

Some potential applications include:

Portable electronic devices: 5V batteries can power portable electronic devices such as smartphones, tablets, handheld gaming consoles, etc., which typically require stable power sources for normal operation.

Home energy storage systems: 5V batteries can be used in home energy storage systems, such as storage units for solar panels. By storing solar energy collected during the day, households can use electricity during nighttime or adverse weather conditions.

Wearable devices: 5V batteries can power various wearable devices like smartwatches, fitness trackers, etc., which usually require small, lightweight power sources.

Educational purposes: 5V batteries can be utilized in educational settings to demonstrate energy storage and conversion principles. Students can learn how batteries store and release energy by building simple circuits or small projects.

Emergency backup power: 5V batteries can serve as emergency backup power sources for critical equipment during emergency situations, such as emergency lighting, communication devices, etc.

When incorporating 5V batteries into energy storage systems, several key considerations must be taken into account:

Safety: Ensuring the safety of batteries during both charging and discharging processes is essential. This involves using appropriate chargers and discharge devices, avoiding overcharging, over-discharging, short circuits, etc., to prevent battery overheating, fires, or explosions.

Battery type selection: Different types of 5V batteries have different characteristics and applications. For instance, lithium-ion batteries are a common choice, but other battery types are also available. When selecting batteries, factors like capacity, cycle life, charge-discharge rates, etc., need to be considered to meet specific application requirements.

Management systems: For large-scale energy storage systems, effective Battery Management Systems (BMS) are required to monitor battery status, temperature, voltage, etc., and take necessary measures to protect batteries from damage.

Environmental adaptability: 5V batteries may perform differently under various environmental conditions. For example, temperature significantly affects battery performance, so working conditions at different temperatures need to be considered.

System design: System design should consider battery placement, connection methods, ventilation, cooling, etc., to ensure batteries operate safely, effectively, and are easy to maintain and manage.

Performance degradation: The performance of 5V batteries gradually declines with use and over time. When designing energy storage systems, battery life and performance degradation need to be considered to ensure the system maintains stable performance over the long term.

In conclusion, Energy Storage Systems (ESS) play a pivotal role in modern energy management, offering solutions for capturing, storing, and releasing energy across various sectors. For innovative energy storage solutions and consultation services tailored to your needs, pls contact us.

Himax Decorative Pictures - battery pro

In the realm of powering electronic devices, voltage regulation stands as a crucial aspect, especially when it comes to the ubiquitous 5V batteries. From portable gadgets to intricate systems, the ability to maintain a stable voltage is paramount.

What is Voltage Regulation?

Voltage regulation is the process of maintaining a stable output voltage regardless of fluctuations in input voltage or changes in load conditions.


Significance of Voltage Regulation in 5V Battery

In the context of 5V batteries, voltage regulation ensures that the output voltage remains close to 5 volts, crucial for the smooth operation of electronic devices. Stable power output is essential for ensuring device performance and functionality. Voltage regulation also protects devices from voltage fluctuations, prolongs battery life, and enhances energy efficiency. By using voltage regulators, battery voltage can be converted to a stable voltage required by the device, safeguarding it from high or low voltage impacts. This regulation also aids in improving overall energy utilization, adapting to different load demands, and ensuring devices operate at a stable voltage under varying working conditions.


Common Voltage Regulation Techniques

Linear Regulator: Linear regulators stabilize output voltage by consuming excess voltage. They are simple, cost-effective, and stable but less efficient, especially when input voltage exceeds output voltage. Efficiency typically ranges between 60% to 80%.

Switching Regulator: Switching regulators adjust input voltage to obtain a stable output voltage using switch principles. They offer higher efficiency by minimizing energy loss but are complex and expensive.

Boost/Buck Converter: Boost converters increase input voltage to the desired output voltage, while buck converters decrease it. They offer stable output under different conditions and efficiency depends on load, input, and output voltage conditions.

decorate - Boost Converters and Buck Converters

For voltage regulation in 5V batteries, a common method is using a buck converter to lower higher battery voltage to 5V. Buck converters adjust input voltage by controlling switch conduction time, ensuring stable output voltage regardless of battery voltage changes.


Switched-mode Power Supply: Switched-mode power supplies adjust output voltage by controlling switch conduction time. They are efficient and flexible, widely used in various applications.

Switched-mode power supply - Wikipedia

In summary, choosing a voltage regulation technique depends on specific application requirements and budget considerations. Higher efficiency techniques generally offer better performance and energy utilization but may entail higher costs and design complexities. As technology evolves and industries embrace new paradigms, the role of voltage regulation in 5V batteries will continue to evolve.


For more insights into cutting-edge batterysolutions, visit Himax.

Himax - Camping-Trips

There’s nothing quite like the feeling of crisp air, the scent of pine trees, and the sense of adventure that comes with exploring nature. Whether you’re pitching a tent in the wilderness or embarking on a rugged hike, one thing’s for sure: having reliable power sources can make all the difference in enhancing your outdoor experience. With the advent of 5V batteries, outdoor enthusiasts now have access to lightweight, rechargeable power sources that are tailor-made for life on the trail. Let’s take a closer look at where 5V batteries are applied in camping and hiking gear:

Portable Solar Chargers

During camping and hiking trips, portable solar chargers prove to be highly practical solutions, especially when power outlets are unavailable. By harnessing solar energy, campers and hikers can keep their electronic devices charged in outdoor environments, ensuring communication, navigation, and safety. As part of the power source, 5V batteries provide stable output voltage for these chargers, ensuring safe charging and normal operation of the devices.

5V Portable Solar Charger

LED Camping Lanterns

5V batteries are commonly used in LED camping lanterns found in camping and hiking gear. Using 5V batteries as the power source for LED camping lanterns offers the following advantages:


5V batteries are usually small and lightweight, making LED camping lanterns easier to carry and use, suitable for outdoor activities and camping.


Compared to traditional dry batteries, 5V batteries are often rechargeable, allowing them to be charged via USB ports or other charging devices, reducing the frequency and cost of battery replacement.


Due to the low energy consumption and high efficiency of LED lights, 5V batteries can provide sufficient illumination for extended periods, making LED camping lanterns more durable for outdoor use.

5v LED Camping Lanterns

Portable Speakers

Who says you can’t bring the party to the great outdoors? Portable speakers powered by 5V batteries typically come equipped with USB charging ports, allowing users to charge them using various charging devices such as portable solar chargers, car chargers, and more. This design enables portable speakers to be easily charged in outdoor environments, ensuring continuous music playback and providing enjoyable music accompaniment for camping and hiking.


USB-Powered Gadgets

From rechargeable headlamps to portable fans, a myriad of USB-powered gadgets now grace the shelves of outdoor gear stores. Thanks to 5V batteries, these gadgets offer unparalleled convenience and versatility, allowing you to stay cool, illuminated, and connected, no matter where your adventures take you.

5v Portable gadgets


At Himax, we are committed to powering your life with cutting-edge battery solutions. If you have any questions please feel free to contact us.

5v battery

With the continuous advancement of science and technology, the development of medical equipment increasingly relies on advanced electronic technology. Because of their low voltage, light weight and portability, 5V batteries have become an ideal power source choice in the medical field, especially for driving small electronic components and portable medical equipment. They can provide reliable power to equipment and enhance patient care and medical equipment. of portability. Here are some examples of medical devices using 5V batteries:

Portable Monitors

Devices that measure and display vital signs such as blood pressure, heart rate, and oxygen saturation may use 5V batteries for their portability and efficient power consumption.

5v Portable Monitors

Blood Glucose Meters

Many glucose meters, used by individuals with diabetes to monitor their blood sugar levels, are designed to be compact and portable. Some of these devices utilize 5V batteries.

5v Blood Glucose Meters


Electronic thermometers, especially those designed for home use, may incorporate 5V batteries to power the temperature sensing and display components.

5v Thermometer

Infusion Pumps

Some types of infusion pumps, which deliver fluids, including medications or nutrients, to a patient’s body, may use 5V batteries for their control systems.

5v Infusion Pumps

Handheld Diagnostic Devices

Certain handheld diagnostic devices, like point-of-care testing equipment, may rely on 5V batteries to power their electronic components.

5v Handheld Diagnostic Devices

It’s important to note that the specific voltage requirements can vary between different devices. If you would like to inquire about battery solutions for medical portable devices, please feel free to contact us.

new energy battery

A comprehensive guide to car batteries, including common voltage and capacity ratings, as well as their various applications and importance in today’s world.


  1. Introduction
  2. Common Voltages and Capacities
  3. Application Areas
  4. Importance in Modern Society
  5. Conclusion


  1. Introduction

The car battery, often overlooked and taken for granted, is a crucial component of any vehicle. It provides the initial burst of power needed to start the engine, as well as maintaining the electrical systems while the engine is running. In this article, we delve into the inner workings of car batteries, discussing common voltage and capacity ratings, their various applications, and their significance in today’s world.

  1. Common Voltages and Capacities

The voltage and capacity of a car battery determine its performance and longevity. A car battery typically has a voltage rating between 12 and 16 volts. The most common voltage ratings are 12 volts, which is standard for most cars, and 16 volts, which is often found in higher-end vehicles or those with electrical needs beyond the norm.

When it comes to capacity, or how much energy a battery can store, batteries are typically measured in ampere-hours (Ah). Common ratings range from 35 Ah to 100 Ah, with most passenger vehicles equipped with batteries in the 50-60 Ah range. The higher the Ah rating, the longer the battery can supply power before recharging.

  1. Application Areas

Car batteries are used in a wide range of applications, from starting the vehicle’s engine to powering auxiliary electrical systems. They supply the initial burst of power needed to turn over the engine, allowing it to begin running. Once the engine is running, the alternator takes over the role of charging the battery while also powering the vehicle’s electrical systems, such as the lights, radio, and climate control.

In addition to their primary function, car batteries also provide backup power in case the engine stops running or the alternator fails. This ensures that the vehicle’s electrical systems can continue to operate, even in an emergency situation.

  1. Importance in Modern Society

In today’s world, where vehicles are increasingly reliant on electrical systems for their operation and comfort, the importance of car batteries has never been greater. A dead battery can strand a vehicle and its occupants, making it crucial for drivers to understand the signs of a weak or dead battery and know how to properly maintain and charge their battery.

Moreover, as vehicles become more advanced, with features like electric ignition, start-stop technology, and advanced safety systems, the demands on car batteries are increasing. This means that batteries must be capable of handling greater power loads while also lasting longer between charges.

  1. Conclusion

The car battery is a crucial component of any vehicle, responsible for providing the initial burst of power needed to start the engine and maintaining the electrical systems while it is running. Understanding common voltage and capacity ratings, as well as their various applications and importance in modern society, is essential for maintaining a reliable and safe vehicle. As technology continues to advance in the automotive industry, it is important to stay up-to-date on the latest battery technologies and best practices for maintaining your vehicle’s battery health.



Overcharging refers to the process of continuing to apply current to a battery after it has reached its charging capacity limit, causing the battery to continue accepting a charge.

In general, 5V lithium-ion batteries are relatively safe under normal charging conditions because modern electronic devices are typically equipped with charging management circuits that can monitor and control the battery’s charging status to prevent overcharging. However, occasional instances of overcharging may occur.

What are the possible phenomena when a 5V lithium-ion battery is overcharged?



Overcharging can lead to the battery overheating, accelerating internal chemical reactions, aging the battery, and compromising its performance. Additionally, overheating may result in safety issues, such as the expansion or even rupture of the battery casing.


Gas Generation

In extreme cases, overcharging may cause the generation of gas inside the battery, leading to the expansion or rupture of the battery casing. Gas generation may also react with components in the electrolyte, further damaging the battery.


Loss of Electrolyte

Electrolyte is essential for the normal operation of the battery, and its loss can result in decreased battery performance, reduced capacity, and even battery failure.


Reduced Battery Lifespan

Overcharging accelerates the aging process of the battery, leading to a shortened lifespan. The cycle life of the battery (the number of charge-discharge cycles) may also significantly decrease.


To avoid overcharging a 5V battery, consider the following practices:

Use Original or Compliant Chargers: Use chargers provided by the original manufacturer or those that comply with relevant standards. This ensures that the charger is designed to meet the battery specifications and incorporates appropriate charging management systems.

Use Appropriate Power Adapters: Ensure that the selected power adapter’s output voltage and current match the battery specifications. Avoid using chargers from unknown sources or those that are not compliant.

Avoid Using Damaged Charging Devices: Refrain from using damaged or broken charging devices, as this may cause unstable current and voltage, increasing the risk of overcharging.

Follow User Instructions: Read and follow the user instructions for both the device and the battery, understanding the maximum allowable charging voltage and current. Ensure compliance with the instructions during use.

Avoid Prolonged Charging: When the battery is fully charged, try to avoid leaving the device plugged in for an extended period. Although modern devices often have charging management systems, it’s still advisable to prevent prolonged charging.

Regularly Check Device and Battery Status: Periodically check the status of the device and the battery to ensure there are no obvious signs of damage or abnormalities. If issues are detected, promptly replace or repair the device.

Use Batteries with Charging Protection: Some batteries come with built-in protection circuits to prevent overcharging. When purchasing batteries, consider selecting models equipped with charging protection features.


Overall, effective battery management is crucial to ensure the safe operation of your 5v batteries and devices, if you are looking for high quality, reliable 5v battery management solutions, please feel free to contact us.

Himax - 4/5sc Sub C Ni-Mh

As we all know, many electric curtains on the market are battery-driven. As the market demand for electric curtains continues to expand, the demand for 18650 battery pack are also increasing. The batteries for electric curtains are very similar in appearance and size.

Currently, the batteries mainly used for electric curtains include 18650 lithium ion battery, 18650 lifepo4 battery, 18650 sodium ion battery, Ni-MH battery

Li ion customized battery packs, 18650 3S1P, 11.1V 2200mAh, 2600mAh, 2800mAh, 3000mAh, etc.

LiFePO4 lithium-ion battery, 18650 4S2P, 12.8V 2000mAh, 18650 12.8V 3000mAh, etc.

Sodium-ion battery pack, 18650 4S2P, 12.4V 2600mAh.

Himax - Battery Ni-Mh 2/3AA 1.2V and li-ion battery pack manufacturing

At present, sodium-ion battery is still in its infancy. Some customers have begun testing samples, and there should be greater feedback in the market in recent years. Sodium-ion batteries are also a new trend in the future development of the battery industry.

Ni-MH battery pack 12V, 10S1P 12V 2500mAh.

This type of battery has mature technology, various models to choose from, and the price is not expensive.

HIMAX makes different type of rechargeable battery for electric curtains.

Himax has now also begun to provide sodium-ion battery solutions to our customers to meet the needs of industry development. We have more than 10 years experience and we we got as high as 99% of satisfaction on quality in these years.

Your inquiries are warmly welcome.

Contact Himax now to unlock your exclusive battery customization options, Himax offers a wide range of options and flexible customization services to meet the needs of different users.
If you have any question, please feel free to contact us:

  • Name: Dawn Zeng (Director)
  • E-mail address: sales@himaxelectronics.com
portable device decorate img

5V batteries are widely employed in various portable devices, characterized by a moderate voltage, compact size, light weight, and relatively high power output, making them an ideal energy source for many mobile devices.

Here are some common portable devices that typically utilize 5V batteries:

  1. Smartphones: The voltage level of 5V batteries is relatively moderate, allowing them to provide sufficient power for smartphones while maintaining a reasonable battery life. This ensures that smartphones can maintain good battery performance over an entire charging cycle.
  2. Tablets: Designed for lightness and portability, tablets often incorporate 5V batteries, offering a balanced power management solution to meet the performance requirements of tablets while maintaining a relatively long battery life. Similar to smartphones, tablets frequently use 5V batteries to support high-resolution screens and complex applications.
  3. Portable Chargers: Since most mobile devices use USB as a charging standard, and the standard voltage for USB charging is 5V, portable chargers with 5V batteries can directly support various USB charging devices, providing broader compatibility.
  4. Bluetooth Headphones and Earphones: Bluetooth headphones and earphones are typically low-power devices that don’t require high voltage to provide sufficient energy. The 5V battery voltage is moderate in this scenario, meeting the power needs of headphones and making them lightweight and easy to carry.
  5. Handheld Gaming Consoles: Designed for portability, handheld gaming consoles often use 5V batteries due to their relatively small size and lightweight, supporting extended gaming experiences.
  6. Smartwatches and Health Trackers: Many smartwatches and health trackers support USB charging with a standard voltage of 5V. By adopting 5V batteries, these devices can directly utilize standard USB charging cables, providing a convenient and universal charging method.
  7. Drones: Small and portable drones typically use 5V batteries to supply the required power for flight.
  8. Cameras and Camcorders: Some portable cameras and camcorders use 5V batteries, making them more convenient to carry and use.
  9. Handheld Electronic Devices: Including small speakers, flashlights, and mobile wireless routers, various portable electronic devices also commonly use 5V batteries.


portable Devices

When applying 5V batteries, it’s essential to consider the following aspects:

  • Compatibility: Ensure that the selected 5V battery is compatible with the device’s voltage requirements to prevent potential damage or performance degradation.
  • Quality and Reliability: Opt for high-quality and reliable brands of 5V batteries to ensure performance and safety. Low-quality batteries may pose risks such as leakage, overheating, and other safety hazards.
  • Charger Selection: Use a charger that aligns with the device’s specifications in terms of charging current and voltage. Using an incorrect charger may impact battery life and safety.
  • Charging Cycles: Avoid frequent deep discharge cycles, as this can accelerate the aging of 5V batteries. Regular charging and maintaining the battery at an appropriate charge level contribute to sustained performance.
  • Temperature Control: Avoid using or charging 5V batteries in extreme temperatures, as extreme conditions may affect battery performance and lifespan. High temperatures can lead to overheating, while low temperatures may cause a reduction in battery capacity.
  • Avoid Overdischarge and Overcharge: Prevent both full discharge and overcharging of 5V batteries. This practice helps extend the battery’s lifespan and reduce internal stress.
  • Storage Conditions: If a device will not be used for an extended period, ensure the battery is fully charged before storage and store it in a cool, dry place. Avoid storing devices and batteries in environments with high temperatures or humidity.
  • Maintenance Alerts: Some devices may provide maintenance alerts or settings related to battery care. It’s crucial to follow the manufacturer’s recommendations and perform maintenance promptly.
  • Monitoring During Charging: Keep the device nearby during charging to take timely action in case of any abnormalities. Overcharging can lead to overheating and safety issues.
  • Prevent Impact and Compression: Avoid subjecting 5V batteries to strong impacts or compression to prevent battery damage, leakage, or short circuits.

5V rechargeable batteries are a common portable power source. Through careful selection, use, and maintenance of 5V batteries, their performance can be optimized, and their lifespan extended. For more information about battery products or other advanced technological solutions, please feel free to contact us.

Researchers led by Genki Kobayashi at the RIKEN Cluster for Pioneering Research in Japan have developed a solid electrolyte for transporting hydride ions (H−) at room temperature.


This breakthrough means that the advantages of hydrogen-based solid-state batteries and fuel cells are within practical reach, including improved safety, efficiency, and energy density, which are essential for advancing toward a practical hydrogen-based energy economy. The study was published in the journal Advanced Energy Materials.


For hydrogen-based energy storage and fuel to become more widespread, it needs to be safe, very efficient, and as simple as possible. Current hydrogen-based fuel cells used in electric cars work by allowing hydrogen protons to pass from one end of the fuel cell to the other through a polymer membrane when generating energy.


Efficient, high-speed hydrogen movement in these fuel cells requires water, meaning that the membrane must be continually hydrated so as not to dry out. This constraint adds a layer of complexity and cost to battery and fuel cell design, limiting the practicality of a next-generation hydrogen-based energy economy. To overcome this problem, scientists have been struggling to find a way to conduct negative hydride ions through solid materials, particularly at room temperature.


The wait is over. “We have achieved a true milestone,” says Kobayashi. “Our result is the first demonstration of a hydride ion-conducting solid electrolyte at room temperature.”


The team had been experimenting with lanthanum hydrides (LaH3-δ) for several reasons: the hydrogen can be released and captured relatively easily, hydride ion conduction is very high, they can work below 100°C, and have a crystal structure.

Hybrid-car-battery (Nickel-metal hydride battery)

But, at room temperature, the number of hydrogens attached to lanthanum fluctuates between 2 and 3, making it impossible to have efficient conduction. This problem is called hydrogen non-stoichiometry and was the biggest obstacle overcome in the new study. When the researchers replaced some of the lanthanum with strontium (Sr) and added just a pinch of oxygen—for a basic formula of La1-xSrxH3-x-2yOy, they got the results they were hoping for.


The team prepared crystalline samples of the material using a process called ball-milling, followed by annealing. They studied the samples at room temperature and found that they could conduct hydride ions at a high rate. Then, they tested its performance in a solid-state fuel cell made from the new material and titanium, varying the amounts of strontium and oxygen in the formula. With an optimal value of at least 0.2 strontium, they observed complete 100% conversion of titanium to titanium hydride, or TiH2. This means that almost zero hydride ions were wasted.


“In the short-term, our results provide material design guidelines for hydride ion-conducting solid electrolytes,” says Kobayashi. “In the long-term, we believe this is an inflection point in the development of batteries, fuel cells, and electrolytic cells that operate by using hydrogen.”


The next step will be to improve performance and create electrode materials that can reversibly absorb and release hydrogen. This would allow batteries to be recharged, as well as make it possible to place hydrogen in storage and easily release it when needed, which is a requirement for hydrogen-based energy use.


More information: Yoshiki Izumi et al, Electropositive Metal Doping into Lanthanum Hydride for H− Conducting Solid Electrolyte Use at Room Temperature, Advanced Energy Materials (2023). DOI: 10.1002/aenm.202301993

Journal information: Advanced Energy Materials

If you have any question, please feel free to contact us:

  • Name: Dawn Zeng (Director)
  • E-mail address: sales@himaxelectronics.com