Impedance Diagnostic for Overcharged Lithium-Ion Batteries

被引：47

作者：

Love, Corey T. ^{[1
]}

Swider-Lyons, Karen ^{[1
]}

机构：

[1] USN, Div Chem, Res Lab, Washington, DC 20375 USA

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2012年 / 15卷 / 04期

关键词：

CATHODE MATERIALS; AC-IMPEDANCE; BEHAVIOR; INTERCALATION; ELECTRODES; TOLERANCE; MECHANISM; CELLS;

D O I：

10.1149/2.014204esl

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

070208 [无线电物理];

摘要：

The impedance response of LiCoO2 broken vertical bar C battery cells is exploited to develop a single-frequency (500 Hz) diagnostic tool to detect overcharge abuse. The impedance data are reversible at all states-of-charge during normal charge/discharge operations (2.8-4.2 V), with little change in Z' or Z '' at 500 Hz even after 200 cycles. However, a single 4.6 V overcharge shows clear differentiation in the impedance values at 500 Hz, which is responsive to the cell passivation layers, with the Z' and Z '' first decreasing and then irreversibly increasing with cycling. Thus, this single-frequency impedance method provides a simple means of monitoring battery health. (C) 2012 The Electrochemical Society. [DOI:10.1149/2.014204esl] All rights reserved.

引用

页码：A53 / A56

页数：4

共 21 条

[1]

Abraham D. P., 2010, SPIE P

[2]

Capacity fade mechanisms and side reactions in lithium-ion batteries [J].