Capacity fade of Li-ion cells: comparison of DC and ENREV charging protocols

B. Popov, A. Durairajan, Y. Podrazhansky, R.C. Cope
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引用次数: 4

Abstract

Sony 18650S Li-ion cells have been cycled using direct current and ENREV pulse charging (CC-CV) protocols. The influence of the charging protocol on the capacity fade of these batteries has been analyzed using cyclic voltammetry, galvanostatic charge-discharge and impedance spectroscopy. Batteries with different cycle numbers charged using ENREV pulse charging protocol showed superior charge transfer performance and rate capabilities and more than 90% retention of the initial capacity after 800 cycles compared with 64% retention of capacity observed for batteries charged using DC charge protocol.
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锂离子电池的容量衰减:直流和ENREV充电方案的比较
索尼18650S锂离子电池使用直流和ENREV脉冲充电(CC-CV)协议进行循环。利用循环伏安法、恒流充放电法和阻抗谱分析了充电方式对电池容量衰减的影响。使用ENREV脉冲充电协议对不同循环次数的电池进行充电后,电池的电荷传输性能和倍率能力均优于使用直流充电协议的电池,在800次循环后,电池的初始容量保留率超过90%,而使用直流充电协议的电池的容量保留率为64%。
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