An accelerated calendar and cycle life study of Li-ion cells
An accelerated calendar and cycle life study of Li-ion cells
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DOI：
10.1016/s0378-7753(01)00783-2
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发表时间：
2001-10-15
影响因子：
9.2
通讯作者：
Case, HL
中科院分区：
文献类型：
--
作者：
Bloom, I;Cole, BW;Case, HL
研究了锂离子电池的加速日历和循环寿命。电池的使用寿命受到温度、时间、荷电状态(SOC)和荷电状态变化(Delta SOC)的强烈影响。在日历寿命实验中，有用的电池寿命受到温度和时间的强烈影响。温度加速了电池性能的退化。面积比阻抗(ASI)的增加和功率衰减的速率遵循基于时间的幂和Arrhenius动力学的简单规律。用这两个概念对数据进行了建模，计算数据与实验值吻合较好，日历寿命随时间增加，功率衰减数据服从(时间)(1/2)动力学。这一行为可能是由于固体电解质界面层的生长所致。从循环寿命实验来看，ASI的增长数据也遵循(时间)(1/2)动力学，但当Delta SOC从3%增加到6%时，整体功率衰减机制发生了明显的变化。这里，时间的功率降到了1/2以下，这表明功率衰减机制比层生长更复杂。(C)2001 Elsevier Science B.V.保留所有权利。
The accelerated calendar and cycle life of lithium-ion cells was studied. Useful cell life was strongly affected by temperature, time, state-of-charge (SOC) and change in state-of-charge (Delta SOC). In calendar life experiments, useful cell life was strongly affected by temperature and time. Temperature accelerated cell performance degradation. The rates of area specific impedance (ASI) increase and power fade followed simple laws based on a power of time and Arrhenius, kinetics. The data have been modeled using these two concepts and the calculated data agree well with the experimental values.The calendar life ASI increase and power fade data follow (time)(1/2) kinetics. This behavior may be due to solid electrolyte interface layer growth. From the cycle life experiments, the ASI increase data follow (time)(1/2) kinetics also, but there is an apparent change in overall power fade mechanism when going from 3 to 6% Delta SOC. Here, the power of time drops to below 1/2, which indicates that the power fade mechanism is more complex than layer growth. (C) 2001 Elsevier Science B.V. All rights reserved.