With the continuous progress of science and technology and the rapid development of society, people’s reliance on electronic products has gradually deepened. In electronic products, the most critical part is the battery, which is widely used as a source of energy for electronic products because of its convenience, mobility, reuse and other advantages. Lithium-ion batteries are one of the most popular batteries today, and their use covers almost all electronic products. However, the cycle life of lithium-ion batteries has always been a concern. In this paper, we will discuss how to improve the cycle life of lithium-ion batteries.
1. Type of material
Material is the first element that affects the cycling performance of lithium-ion batteries. If you choose a material with poor cycling properties, no matter how perfect the process is, the cycle of the battery cannot be guaranteed. If you choose a material with good cycling performance and a slight lack of craftsmanship and fabrication, the cycling performance can also be guaranteed. The poor cycling performance of the material, on the one hand, may be rapid changes of the crystal structure during the cycling process, so that can not continue to complete the embedded lithium delithiation; on the other hand, may be due to the active electrolyte consumption is too fast to affect the cycle of the battery. Therefore, the cycle life of the battery can be improved by choosing materials with better cycling performance.
2. Positive and negative compaction
Excessive compaction of the positive and negative electrodes can increase the energy density of the battery but reduce the cycling performance of the material to a certain extent. The greater the compaction of the positive and negative electrodes, the greater the damage to the structure of the material, which is the basis of the lithium-ion battery cycle. In addition the higher the compaction of the positive and negative terminals, the worse the battery’s fluid retention, which is the basis for the battery to complete a normal cycle or more. Therefore, in order to increase the cycle life of the battery, it is necessary to reduce the compaction of the positive and negative electrodes.
3. Moisture content
Excessive water will have a side reaction with the positive and negative active substances, destroying their structure and thus affecting the circulation, and at the same time, too much water is not favorable to the formation of the SEI membrane. However, while trace water is difficult to remove, trace water can also ensure the performance of the battery to a certain extent.
4. Electrolyte volume
Insufficient electrolyte volume affects the cycle for three main reasons:
1. Insufficient injection volume.
2. Insufficient liquid absorption due to high compaction of positive and negative electrodes.
3. As the electrolyte inside the cycling cell is consumed, a SEI film forms between the negative electrode and the electrolyte, resulting in faster electrolyte consumption during cycling. No matter how many times a battery is cycled, the electrolyte will be depleted with cycling, so increasing the amount of fluid retention can improve its cycling performance to some extent.
The development of electronic products requires high-quality energy support, and lithium-ion batteries are undoubtedly one of the most important energy storage devices in today’s electronic products. While using lithium-ion batteries, we should continue to improve their cycle life to bring more security for maintaining the efficient operation and use of electronic products. If you want high quality and long lifespan lithium battery with very competitive price, please contact us!
