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Shenzhen Green Power Energy Battery Co.,ltd specializes in a wide range of digital battery such as environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery, 3.7V lithium polymer battery, NiMH battery, NiCD battery, dry cell battery, alkaline battery, heavy duty battery, button cell battery etc. we devote to R&D, innovation, production & sales. With automatic production machines we have been exported goods to all over the world over 15years. We have complete exported certificate such as KC, CE, UL, BSCI, ROHS, BIS, SGS, PSE etc
Dongguan Datapower New Energy Co.,ltd is a high-tech production enterprise which specialize in the R&D and production&sale of lithium polymer batteries,drone battery,airplane batteries &battery pack etc.
Anhui Seong-hee New Energy Technology Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of primary batteries. And mainly produces and sells alkaline batteries & carbon zinc batteries. there are size AA, AAA, C, D, 9V etc
Guizhou STD Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production & sale of lithium polymer batteries, drone battery, airplane batteries & battery pack etc.
release time:2025-06-07 Hits: Popular:AG11 battery
Capacity Retention Rate of Polymer Batteries
The capacity retention rate of polymer batteries is a key indicator of their long - term performance and reliability. It refers to the percentage of the battery's initial capacity that remains after a certain number of charge - discharge cycles or a specific period of use. A high capacity retention rate ensures that the battery can maintain its energy - storage capabilities over time, which is crucial for applications where long - term and stable power supply is required.
Several factors affect the capacity retention rate of polymer batteries. One of the main factors is the chemical reactions occurring within the battery during cycling. Side reactions, such as the formation of solid - electrolyte interphase (SEI) layers on the electrode surfaces, can consume active lithium ions and electrode materials, gradually reducing the battery's capacity. The quality and stability of the SEI layer are critical. A stable and thin SEI layer can protect the electrodes from further degradation, while an unstable or thick SEI layer can increase internal resistance and accelerate capacity loss.
Temperature also has a significant impact on capacity retention. High temperatures can accelerate chemical reactions within the battery, leading to faster degradation of the electrode materials and the electrolyte. On the other hand, extremely low temperatures can reduce the ionic conductivity of the electrolyte, affecting the battery's performance and capacity. Therefore, operating polymer batteries within an appropriate temperature range, usually between 20°C - 40°C for optimal performance, helps maintain a higher capacity retention rate.
The charging and discharging rate, or the C - rate, is another important factor. High - rate charging and discharging can cause stress on the battery, leading to increased internal resistance and accelerated capacity fading. Using a moderate C - rate during charging and discharging cycles can help preserve the battery's capacity over time. Additionally, avoiding overcharging and over - discharging, which can cause irreversible damage to the battery, is essential for maintaining a good capacity retention rate.
To improve the capacity retention rate, battery manufacturers are constantly researching and developing new materials and technologies. For example, using more stable electrode materials, optimizing the electrolyte composition to suppress side reactions, and developing advanced battery management systems to monitor and control the charging and discharging processes more precisely. By addressing these factors and implementing appropriate strategies, it is possible to enhance the capacity retention rate of polymer batteries, extending their service life and improving their overall performance.
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