Lithium battery pack refers to the assembly and production of lithium batterie. Pack refers to the packaging, encapsulation and assembly of lithium batterie. The main process is divided into three major parts: processing, assembly and packaging. When several modules are controlled or managed together by BMS and thermal management system, this unified whole is called lithium battery pack.

Composition of lithium battery pack:

lithium ion battery packs are generally made up of a collection of several Li-ion battery cells, with the addition of a BMS, and connectors. Thus forming the final product provided by the battery pack manufacturer to the user. The li-ion battery pack has a variety of shell materials, such as PVC, aluminium shell, steel shell, ABS shell and so on.

lithium batterie

 

Lithium battery pack features:

  1. 1.Functional integrity and can be used directly.
  2. 2.Diversity, a demand for a variety of realisation.
  3. 3. Longer service life.
  4. 4. Each lithium batterie can give full play to the energy of the battery, safe and reliable.

At present, 18650 batteries pack is widely used in the consumer electronics market, covering exploration equipment, robots, mobile phones, laptops, game consoles, digital cameras, portable devices and so on.

HIMAX can make all kinds of custom lithium battery pack and 12v lead acid replacement battery for our customers. We have full of confidence to meet your quality level. Looking forward to build a long term business with you and we wait for your kind respond

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

Compared to lithium batterie, Sodium-ion batteries still have a number of weaknesses that could be remedied by optimizing the battery materials. One possibility is to dope the cathode material with foreign elements. A team from HZB and Humboldt-Universität zu Berlin has now investigated the effects of doping with scandium and magnesium.

The scientists collected data at the X-ray sources BESSY II, PETRA III, and SOLARIS to get a complete picture and uncovered two competing mechanisms that determine the stability of the cathodes. Their research is published in the journal Advanced Materials.

Lithium batterie have the highest possible energy density per kilogram, but lithium batterie resources are limited. Sodium, on the other hand, has a virtually unlimited supply and is the second-best option in terms of energy density. Sodium-ion batteries (SIBs) would therefore be a good alternative, especially if the weight of the batteries is not a major concern, for example in stationary energy storage systems.

However, experts are convinced that the capacity of these batteries could be significantly increased by a targeted material design of the cathodes. Cathode materials made of layered transition metal oxides with the elements nickel and manganese (NMO cathodes) are particularly promising.

They form host structures in which the sodium ions are stored during discharge and released again during charging. However, there is a risk of chemical reactions which may initially improve the capacity, but ultimately degrade the cathode material through local structural changes. This has the consequence of reducing the lifetime of the sodium-ion batteries.

“But we need high capacity with high stability,” says Dr. Katherine Mazzio, who is a member of the joint research group Operando Battery Analysis at HZB and the Humboldt-Universität zu Berlin, headed by Prof Philipp Adelhelm. Spearheaded by Ph.D. student Yongchun Li, they have now investigated how doping with foreign elements affects the NMO cathodes.

Different elements were selected as dopants that have similar ionic radii to nickel (Ni 2+), but different valence states: magnesium (Mg 2+) ions or scandium ions (Sc 3+).

14.8V 4Ah Li Ion Customized Battery Packs-lithium batterie

Three years of experiments at BESSY II, PETRA III, and SOLARIS

To decipher the influence of the two elements, they had to carry out experiments at three different X-ray sources.

At BESSY II, they analyzed the samples using resonant inelastic X-ray scattering (RIXS) and X-ray absorption spectroscopy (XAS) in the soft and hard X-ray ranges; at PETRA III, they evaluated structural changes with X-ray diffraction (XRD) and pair distribution function analysis (PDF) with hard X-rays, and for more detailed insights on the element magnesium, they carried out additional soft XAS investigations at the PIRX beamline at SOLARIS.

“The results surprised us,” explains Mazzio. Although doping with scandium leads to fewer structural changes during the electrochemical cycle than doping with magnesium, it does not improve stability. “Until now, it was thought that suppressing phase transitions (and thus volume changes) would also improve the cathode material cycling performance over many cycles. But that’s not enough.”

Magnesium doping suppresses the oxygen redox reaction in NMO even more. This was also unexpected, as magnesium is known to trigger an oxygen redox reaction in layered manganese oxides. “We analyzed different Mg/Ni ratios in NMO and found that the oxygen redox reaction reaches a minimum at a ratio close to 1,” explains Mazzio.

“Only through a combination of advanced X-ray techniques could we show that it is more than just suppression phase transitions that are important for improving the long-term cycling behavior, but also the interplay between Ni and O redox activity dictate performance.”

More information: Yongchun Li et al, Competing Mechanisms Determine Oxygen Redox in Doped Ni–Mn Based Layered Oxides for Na‐Ion Batteries, Advanced Materials (2024). DOI: 10.1002/adma.202309842

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

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

LiFePO4 batteries have garnered significant attention in recent years due to their impressive cycle life and charge/discharge performance. As a leading energy storage solution, understanding the intricacies of LiFePO4 batteries is essential for businesses and individuals alike.

What are LiFePO4 Batteries?

LiFePO4 batteries, or lithium iron phosphate batteries, belong to the family of lithium-ion batteries renowned for their stability, high energy density, and long cycle life. Unlike conventional lithium-ion batteries, LiFePO4 batteries offer improved safety and thermal stability, making them ideal for a wide range of applications, including electric vehicles, renewable energy storage, and portable electronics.

Himax AGM Replacement Battery 12V 120Ah

What are the factors that affect the cycle life of LiFePO4 batteries?

Depth of Discharge (DoD)

The cycle life of LiFePO4 battery is closely tied to the depth of charge and discharge cycles. Generally, shallower discharge depths extend battery lifespan. It’s recommended to maintain discharge depths between 20% and 80% to balance performance and cycle life.

Charging Voltage and Rate

Excessive charging voltage or rate can induce stress within the battery, leading to reduced cycle life. Strict control over charging voltage and rate can prolong battery lifespan.

Temperature Management

LiFePO4 batteries may experience decreased performance at lower temperatures, while high temperatures accelerate battery aging. Therefore, effective temperature management is crucial for extending battery lifespan.

Frequency of Charge/Discharge Cycles

Frequent charge/discharge cycles can accelerate battery aging. Minimizing frequent charge/discharge cycles can extend battery lifespan.

Lifepo4 Cells 6.4v

How to maximize the lifespan of LiFePO4 batteries?

Control Depth of Discharge (DoD): The depth to which a battery is discharged during each cycle significantly impacts its overall lifespan. Avoid fully charging or discharging LiFePO4 batteries. It’s recommended to keep the depth of discharge between 20% and 80%. Deep discharge accelerates battery aging, so limiting the DoD helps extend battery life.

Avoid Overcharging: Control charging voltage and rate rigorously to prevent overcharging. Excessive charging voltage can lead to electrolyte decomposition and internal stress, reducing battery lifespan.

Effective Temperature Management: Ensure LiFePO4 batteries operate within the appropriate temperature range. High temperatures accelerate battery aging, while low temperatures reduce battery performance. Avoid exposing batteries to extreme temperature conditions and take measures to maintain optimal operating temperatures.

Minimize Frequent Charge/Discharge Cycles: Reduce unnecessary charge/discharge cycles as frequent cycling accelerates battery aging. Minimizing these cycles helps prolong battery life.

Utilize Advanced Battery Management Systems (BMS): Implement BMS to monitor battery status and adjust charging/discharging processes accordingly. This optimization maximizes battery performance and lifespan.

Avoid Vibration and Mechanical Stress: Vibrations and mechanical stress can damage LiFePO4 battery internals, leading to performance degradation. Minimize exposure to severe vibrations during installation and use.

Regular Maintenance and Inspection: Perform regular inspections and maintenance on LiFePO4 batteries. Ensure connectors and wiring are in good condition, clean battery surfaces, and check for any abnormalities. Regular maintenance allows for early detection and resolution of issues, prolonging battery lifespan.

In summary, through prudent control of charge/discharge cycles, temperature management, and the use of battery management systems, LiFePO4 battery lifespan can be maximized while optimizing charge/discharge performance.

For more information on energy storage solutions and battery technologies, visit himaxelectronics.com.

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AGM replacement battery/marine battery/lithium batterie/battery replacement/Energy storage battery/ LiFePO4 battery bank are widely used in our daily life. And in some areas, like North America, North Europe, the temperature in winter is always lower than 32°F (0°C). How can they use the battery properly in winter, such as charging and discharging, below 32°F (0°C)? This is a practical problem that customers will meet.

Himax 12V 6000mAH lifepo4 battery

As we know, conventional lithium-ion batteries or LiFePO4 battery cannot be charged at temperature below 32°F (0°C).

Gladly, the heating film can help to solve this problem. When the temperature is below 32°F (0°C), the heating film will be turned on under charging conditions. During heating , the charger only supplies power for the heating film and it will not charge the battery. When battery heats up to 50°F (10°C), the BMS stops heating and the battery starts to charge. When storaging and discharging, the heating film neither works nor consumes battery power.

Currently, our 12V 100Ah/25.6V 100Ah/51.2V 100Ah LiFePO4 battery bank, or other AGM replacement battery can be equipped with a heating pad, which can help to solve the charging problem when temperature below 32°F (0°C).

HIMAX can make all kinds of custom lithium battery pack and 12v lead acid replacement battery for our customers. We have full of confidence to meet your quality level. Looking forward to build a long term business with you and we wait for your kind respond

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
LiFePO4 Battery 12V 100Ah

In the world of batteries, Lithium Iron Phosphate (LiFePO4) batteries, commonly referred to as Lifepo4 batteries, have emerged as a leading choice for numerous applications. This blog post aims to provide a comprehensive guide to Lifepo4 batteries, focusing on their key features, benefits, and potential applications. Let’s delve into the world of Lifepo4 batteries and explore their potential!

High Voltage lifepo4 Battery

What is a Lifepo4 Battery?

 

Lifepo4 batteries, or Lithium Iron Phosphate Batteries, are rechargeable batteries that offer high energy density, long cycle life, and excellent safety features. These batteries are made up of Lithium Iron Phosphate (LiFePO4) as the cathode material, which provides stability and safety during operation.

 

The Components of a Lifepo4 Battery

 

A Lifepo4 battery consists of several key components, including the cathode, anode, separator, and electrolyte. The cathode is made up of Lithium Iron Phosphate, which stores and releases energy during charging and discharging. The anode typically uses carbon-based materials to store lithium ions. The separator keeps the cathode and anode apart, preventing short circuits, while the electrolyte allows the movement of lithium ions between the two electrodes.

 

The Advantages of Lifepo4 Batteries

 

Lifepo4 batteries offer several advantages over traditional battery technologies. Firstly, they have a high energy density, meaning they can store more energy per unit volume or weight. Secondly, Lifepo4 batteries have a long cycle life, with the ability to undergo thousands of charge and discharge cycles without significant degradation. Additionally, they have excellent safety features, being non-toxic and non-flammable, reducing the risk of fire or explosion.

 

Lifepo4 Battery Packs and Cells

 

Lifepo4 batteries are often combined into battery packs or cells to provide higher voltage and capacity for specific applications. Battery packs are made up of multiple cells, which are connected in series or parallel to achieve the desired voltage and capacity. This configuration allows for flexible scaling and customization to meet the specific energy storage needs of different applications.

 

Rechargeable Lifepo4 Batteries

 

Another key advantage of Lifepo4 batteries is their rechargeability. Unlike disposable batteries, Lifepo4 batteries can be charged and discharged multiple times, making them a sustainable and cost-effective choice for long-term use. This feature is particularly beneficial for applications that require continuous energy storage and supply, such as electric vehicles, solar energy systems, and UPS systems.

 

Lifepo4 Battery Management Systems

 

To ensure optimal performance and safety, Lifepo4 batteries require a battery management system (BMS). The BMS monitors and controls the operation of the battery, ensuring that it is operated within safe limits. It prevents overcharging and over-discharging, balances the cells within the battery pack, and provides valuable information about the battery’s status and performance. By optimizing the BMS, it is possible to achieve optimal performance and extend the battery’s lifespan.

 

Applications of Lifepo4 Batteries

 

Lifepo4 batteries have found widespread applications in various industries due to their versatility and reliability. They are commonly used in electric vehicles, including cars, buses, and motorcycles, providing a sustainable and efficient energy storage solution. Additionally, Lifepo4 batteries are used in solar energy systems, wind turbines, and other renewable energy applications to store excess energy and supply it during peak demand periods. They are also used in UPS systems, marine applications, and other industrial applications that require reliable and long-lasting energy storage.

 

In conclusion, Lifepo4 batteries offer numerous advantages over traditional battery technologies, making them a leading choice for various applications. Their high energy density, long cycle life, and excellent safety features make them suitable for a wide range of industries, including electric vehicles, renewable energy, and industrial applications. As technology continues to advance, we can expect even more innovative applications for Lifepo4 batteries, unlocking their full potential in the field of energy storage.

 

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A multi-institutional team of Chinese engineers has developed a proof-of-concept calcium-based battery that withstands 700 charge cycles at room temperature. In their paper published in the journal Nature, the group describes the challenges they addressed in developing the battery and what they have learned about the possible use of calcium-based batteries in consumer products in the future.

The current standard for rechargeable custom lithium battery pack used in consumer products is lithium. But because it is a rare material and has issues such as poor aging and the need to prevent overcharge, scientists have been looking for a suitable replacement. One such material is calcium, which is 2,500 times as abundant as lithium.

LiTypes of Lithium-ion-Li Ion Customized Battery Packs

Prior research has suggested rechargeable batteries based on calcium should be possible if problems can be resolved. One of the biggest challenges is finding suitable electrolyte and electrode materials that can provide stability and safety.

 

In this new effort, the researchers attempted to develop a useable, rechargeable, calcium–oxygen-based battery—prior research has suggested such pairings are likely to have the highest energy density of calcium-based batteries. Prior efforts to create batteries using this approach have run into problems with inactive discharge materials, and it has also been challenging to find electrolytes that can work with both calcium and oxygen.

To overcome these problems, the team in China created a new type of liquid electrolyte that works with both calcium and oxygen. This involved the use of a two-electron redox process and specific proportions of materials. The result was a battery that could be charged and recharged up to 700 times at room temperature.

The research team also incorporated their battery into flexible fibers which they wove into a textile, presenting the possibility of wearable consumer products. They acknowledge that the battery is still not efficient enough for use in commercial products, but they plan to continue their work to see if it can be improved.

More information: Lei Ye et al, A rechargeable calcium–oxygen battery that operates at room temperature, Nature (2024). DOI: 10.1038/s41586-023-06949-x

Journal information: Nature

© 2024 Science X Network

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  • Name: Dawn Zeng (Director)
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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.

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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.

5v-2200mah-li-ion-battery

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:

Portability

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

Rechargeability

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.

Durability

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.

Structure-Of-Steel

Li ion customized battery packs are a widely used class of rechargeable batteries in today’s world. One of the processes that can hamper the functioning of these batteries is an internal short circuit caused by direct contact between the cathode and anode (the conductors that complete the circuit within a battery).

To avoid this, separators composed of polyolefins—a type of polymer—can be employed to maintain separation. However, these separators can melt at higher temperatures, and the inadequate absorption of electrolytes (essential for conveying charges between electrodes) can result in short circuits and diminished efficiency. To tackle these issues, several different methods have been proposed.

One such method is to apply ceramic coatings on the separators to improve the way they handle pressure and heat. However, this can increase the thickness of the separators, reduce their adhesion, and harm battery performance. Another technique is to use polymer coatings, in a process known as graft polymerization. This involves the attachment of individual units (monomers) to the separators to give them the desired qualities.

A recent study published in Energy Storage Materials now demonstrates successful graft polymerization on a polypropylene (PP) separator, incorporating a uniform layer of silicon dioxide (SiO2). The discovery is the result of a joint study that including Assistant Professor Jeongsik Yun from the Department of Energy and Chemical Engineering at Incheon National University.

Dr. Yun was motivated by the need for high-performance battery materials in electric vehicles to achieve longer driving ranges, an area he has been actively working on. Beyond improving battery performance, his goal is to ease consumer concerns about battery explosions, potentially influencing their decisions to embrace electric vehicles.

According to him, “Battery explosions are frequently initiated from the melting of a separator. The commercial battery separator is made of polyolefins, a class of polymers which are vulnerable to heat. We therefore aimed to improve the thermal stability of the commercial separators by coating them with thermally robust materials such as SiO2 particles.”

In this study, a PP separator was modified in several ways. Initially, it was coated with a layer of polyvinylidene fluoride, a chemical chosen to enhance electrolyte affinity and thermal stability, while also introducing grafting reaction sites. Then, the separator underwent grafting with methacrylate molecules, followed by a final coating with SiO2 particles. These modifications made the separator stronger and more resistant to heat, suppressed the growth of lithium dendrites, and helped improve the cycling performance.

The modifications not only preserved the energy storage of li ion customized battery packs per unit volume, but also outperformed other coating methods in cell performance. This technique thus shows promise for creating robust separators and advancing the use of li ion customized battery packs in electric vehicles and energy storage systems.

“We hope that the results of this study can enable the development of high-safety lithium batteries. We believe that the thermal stability of these batteries will greatly benefit the current fire-sensitive electric vehicle field. In the long term, this can motivate people to choose electric vehicles and in urban areas, reduce the suffering of people from breathing in the polluted air generated by the internal combustion engines,” envisions Dr. Yun.

In summary, this study presents a reliable method for creating an innovative and durable separator for lithium-ion batteries, potentially paving the way for a greener future.

More information: Jaewon Park et al, Ultra-thin SiO2 nanoparticle layered separators by a surface multi-functionalization strategy for Li-metal batteries: Highly enhanced Li-dendrite resistance and thermal properties, Energy Storage Materials (2023). DOI: 10.1016/j.ensm.2023.103135

Provided by Incheon National University