电容
电化学
材料科学
容量损失
电池(电)
降级(电信)
电极
电阻抗
锂(药物)
化学工程
多孔性
介电谱
离子
分析化学(期刊)
化学
复合材料
热力学
电气工程
色谱法
物理
工程类
内分泌学
物理化学
功率(物理)
有机化学
医学
作者
Nobuhiro Ogihara,Yuichi Itou,Saju Kawauchi
标识
DOI:10.1021/acs.jpclett.9b01670
摘要
The decline of lithium-ion battery (LIB) performance at low temperatures, caused by the nonuniform occurrence of electrochemical reactions during cycling and the resulting irreversible capacity loss, significantly hinders further LIB commercialization. Herein, we report the first solution by analyzing the impedance using symmetric cells in the absence of charge-transfer reactions to obtain a parameter quantitatively describing ion transport in porous electrodes and thus modeling the effects of nonuniform reaction occurrence. The reciprocal of ionic resistance in porous electrodes (Rion–1) is found to be positively correlated with capacity retention during low-temperature cycling and is approximated as the product of maximum capacitance related to electric double-layer formation (Cdl,max) and the associated frequency (f0). Consequently, these ion-transport parameters can be used to predict capacity retention during low-temperature cycling, and the adopted approach therefore can help to mitigate low-temperature LIB performance degradation and thus contribute to the fabrication of next-generation rechargeable batteries.
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