In our technologically dependent society, the mobility, dependability, and safety of our devices—including phones and laptops—are critical. Just as important is our ability to easily charge and recharge these devices so they are available when we need them. To do this, we use rechargeable batteries, specifically lithium batterie.

They give us the freedom of movement and connectivity we need. As society’s needs evolve, so too does our tech, and so too must the batteries that allow us to use this tech. One of the most urgent concerns regarding lithium-ion batteries is their safety. Though rare, there are issues with explosions and fires caused by electrochemical system instability.

“Consequently, there is an urgent need to develop LIBs that can provide higher energy density, longer cycle life, and improved safety,” said Ying Bai, corresponding author of new research on this topic and a professor at the Beijing Institute of Technology in China.

Beijing scientists have been researching the use of additives in the sulfone-based electrolyte of  lithium batterie to improve their performance. They found that by adding triphenylphosphine oxide (TPPO), “the TPPO improves the thermal stability of the electrolyte, which has important industrial value and foundational significance of TPPO as an additive for advancing the development of LIB’s,” said Chuan Wu, co-corresponding author on the research and a professor at Beijing Institute of Technology.

The team’s paper is published in Energy Materials and Devices.

When lithium batterie is discharging lithium-ions, they move from an anode, which is an electrode where current enters the battery, through an electrolyte that passes through a separator to a cathode, which is where the current leaves the storage battery to energize a device. The path is reversed when recharging.

“In the composition of the battery, the non-aqueous electrolyte used in LIBs plays a crucial role in determining key performance parameters such as cycle life, power density, and efficiency,” said Ying Bai. Power density is a measure of stored power per volume, and cycle life is the number of charge/discharge cycles that a battery can undergo before it starts to decrease the percentage of charge it can hold.

The electrolyte solutions in use now have some issues with cycle stability, thermal stability, and safety. Rather than completely changing the electrolyte solution, the team chose to test the use of an additive, TPPO, in the electrolyte to improve the performance of the overall battery.

When tested, TPPO was found to have several important properties.

“Firstly, it reduces the flame point of the sulfone electrolyte; Secondly, it selectively forms a stable passivation film, enhancing the interface stability between the sulfone electrolyte and the electrode material,” said Chuan Wu. The passivation film forms as the TPPO decomposes and coats the cathode, rendering it more resistant to wear and tear, similarly reducing the electrolyte’s breakdown while enhancing the lithium ions’ movement across the electrolyte.

Using theoretical calculations, electrochemical characterization, and flammability tests, the researchers found “that the addition of 2 wt.% TPPO to the sulfone-based electrolyte significantly enhances the ionic conductivity within the temperature range of 20–60°C.”

“Additionally, it increases the discharge capacity of LIBs in the range of 2–4.8 V while maintaining excellent rate performance and cycling stability. Flammability tests and thermal gravimetric analysis (TGA) results indicate the excellent non-flammability and thermal stability of the electrolyte,” said Ying Bai.

In short, the new electrolyte that they have developed is safer as it is non-flammable, is thermally stable and has an increased energy discharge capacity.

More information: Qiaojun Li et al, Enhanced safety of sulfone-based electrolytes for lithium batterie: broadening electrochemical window and enhancing thermal stability, Energy Materials and Devices (2024). DOI: 10.26599/EMD.2023.9370022

Provided by Tsinghua University Press

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• Name: Dawn Zeng (Director)
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The 18650 batteries pack is a type of lithium-ion battery with the model number 18650, which is mainly used for equipment and tools that provide high power output. Here are some features and applications about 18650 power lithium batteries:

Power output: 18650 power lithium batterieusually have large capacity and high power output capability, which can meet the needs of high energy consumption devices. They can provide reliable power supply and are suitable for power tools, electric vehicles, drones and other devices that require a large amount of energy output. Capacity and Voltage: The capacity of 18650 power lithium batteries varies between models, generally between 1000 milliamp hours (mAh) and 3500mAh. They often output at a standard voltage of 3.6V or 3.7V to provide stable power.

Charge and Discharge Performance: 18650 power lithium batteries have good charge and discharge performance and can absorb and release electrical energy quickly. They can complete charging in a shorter time and output power with high current, suitable for those devices with high demand for electrical energy.

Versatility: 18650 batteries pack are a common standard size battery, so they are easy to find on the market and use in a variety of devices that support the 18650 specification. This versatility makes 18650 batteries an option for a wide range of applications in many different fields for easy replacement and repair.

It is important to note that when using 18650 lithium batteries, you should follow proper charging and usage rules to avoid over-discharging and over-charging, as well as choosing reliable brands and suppliers that meet quality standards and certifications. This will ensure the performance and safety of the battery.

The difference between 18650 power lithium batteries and ordinary lithium batteries is mainly reflected in the following aspects:

Use: 18650 power lithium batteries are mainly used in high-power equipment and tools, such as power tools, electric vehicles and other equipment that requires a large amount of energy output. Ordinary lithium batteries are more often used in low-power electronic devices, such as alarm clocks, remote controls, torches and so on.

Capacity and power: 18650 power lithium batteries generally have a larger capacity and higher power output, which can provide longer use time and higher current output. Ordinary lithium batteries usually have smaller capacity and power.

Size and shape: 18650 lithium power battery is named after the specification size “18650” in its name, which has a diameter of about 18mm, a length of about 65mm, and is in cylindrical shape. Ordinary lithium batteries have a variety of specifications and shapes, such as cylindrical, square, flat and so on.

Charge and discharge performance: 18650 lithium power batteries usually have better charge and discharge performance, and can absorb and release electricity more quickly. The charging and discharging performance of ordinary lithium batteries is relatively weak.

It should be noted that different brands and models of batteries may differ in performance and characteristics, the above is the difference in general. When using batteries, you should choose the right type of battery according to the needs and recommended specifications of the equipment.

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

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

Lithium batterie has become ubiquitous in our lives. I believe that many people have encountered the situation of lithium batterie can not be charged. Here, we will tell you some common reasons why lithium batterie can not be charged and how to deal with them.

1. Poor connection of the battery charger: If the contact between the lithium batterie and the charger is poor, it will lead to the battery can not be charged. At this time, please check whether the contact between the battery and the charger plug is good, or replace the charger and battery to try.

2. Incorrect battery polarity: If the battery is reversed into the charger, it will also result in the battery not charging. We should connect the positive terminal of the battery to the positive terminal of the charger and the negative terminal of the battery to the negative terminal of the charger.

3. Faulty charger: A faulty charger will prevent the battery from charging. In this case, you need to replace the charger to solve the problem.

4. Battery aging: If the lithium ion battery has been used for a long time, the capacity of the battery may have been reduced, the internal resistance of the battery may increase, these will lead to the battery can not be fully charged. At this time you need to replace the battery with a new one.

5. Insufficient charging voltage: If the output voltage of the charger is insufficient, it will also lead to the battery can not be fully charged. At this time you need to check whether the output voltage of the charger meets the requirements of 18650 batteries pack.

In short, if the lithium battery can not be charged, we need to check the connection, polarity, charger, battery aging and many other factors, find the problem and repair or replace the device.

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

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

In the race to develop the most efficient and sustainable energy storage technology, two leading contenders have emerged: sodium ion batteries and li ion customized battery packs. While lithium ion batteries currently hold the market share, sodium ion batteries offer several advantages that could disrupt the energy storage landscape in the coming years.

Li ion customized battery packs, which are widely used in consumer electronics, electric vehicles, and grid-scale energy storage systems, have a long track record of performance and reliability. Lithium ion batteries store energy in the form of lithium ions, which can travel through an electrolyte to power the battery. They have a high energy density, meaning they can store a large amount of energy in a small space. Lithium ion batteries also have a relatively long lifespan, making them a cost-effective choice for many applications.

However, lithium is a rare metal, making li ion customized battery packs expensive and environmentally unfriendly to produce. The extraction and refinement of lithium require significant resources and can have negative impacts on the environment. Furthermore, lithium ion batteries may not be the best solution for large-scale grid storage or for widespread use in electric vehicles due to their limited supply and high cost.

Sodium ion batteries, on the other hand, offer a more sustainable and cost-effective alternative to lithium ion batteries. Sodium is abundant and widely distributed, making it a less expensive and more environmentally friendly material for battery production. Sodium ion batteries work similarly to lithium ion batteries, storing energy in the form of sodium ions that travel through an electrolyte. They have a high specific capacity, meaning they can store more energy per unit weight compared to lithium ion batteries.

Another advantage of sodium ion batteries is their wide temperature range. They can operate in a variety of climates and conditions, making them suitable for use in extreme environments or in remote locations where temperature control is challenging. This flexibility could make sodium ion batteries a good choice for grid-scale storage in areas with variable climates or limited infrastructure.

Despite their advantages, sodium ion batteries still face challenges before they can compete with lithium ion batteries on the market. Researchers are working to improve the performance, lifespan, and cost-effectiveness of sodium ion batteries to make them viable alternatives. Development efforts are focused on improving the electrode materials, developing new electrolytes, and optimizing battery designs to improve energy density and charge/discharge rates.

The future of energy storage is uncertain as more research is conducted on both sodium ion batteries and li ion customized battery packs. It remains to be seen which technology will ultimately prevail. However, as the race continues, it’s clear that the development of sustainable and cost-effective energy storage solutions is critical for meeting the growing demand for clean and efficient energy worldwide.