电池(电)
材料科学
锂(药物)
电压
荷电状态
电极
可用的
粒子(生态学)
离子
光电子学
计算机科学
电气工程
化学
功率(物理)
物理
热力学
工程类
医学
有机化学
物理化学
内分泌学
海洋学
地质学
万维网
作者
Tsuyoshi Sasaki,Yoshio Ukyo,Petr Novák
出处
期刊:Nature Materials
[Springer Nature]
日期:2013-04-14
卷期号:12 (6): 569-575
被引量:289
摘要
Memory effects are well known to users of nickel-cadmium and nickel-metal-hydride batteries. If these batteries are recharged repeatedly after being only partially discharged, they gradually lose usable capacity owing to a reduced working voltage. Lithium-ion batteries, in contrast, are considered to have no memory effect. Here we report a memory effect in LiFePO4-one of the materials used for the positive electrode in Li-ion batteries-that appears already after only one cycle of partial charge and discharge. We characterize this memory effect of LiFePO4 and explain its connection to the particle-by-particle charge/discharge model. This effect is important for most battery uses, as the slight voltage change it causes can lead to substantial miscalculations in estimating the state of charge of batteries.
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