Investigation of the Reasons for Capacity Fading in Li-Ion Battery Cells

被引：58

作者：

Ziv, Baruch ^{[1
]}

Borgel, Valentina ^{[1
]}

Aurbach, Doron ^{[1
]}

Kim, Jung-Hyun ^{[2
]}

Xiao, Xingcheng ^{[2
]}

Powell, Bob R. ^{[2
]}

机构：

[1] Bar Ilan Univ, Dept Chem, IL-52900 Ramat Gan, Israel

[2] Gen Motors Global Res & Dev Ctr, Chem & Mat Syst Lab, Warren, MI 48090 USA

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2014年 / 161卷 / 10期

基金：

美国国家科学基金会;

关键词：

ELECTROCHEMICAL-BEHAVIOR; ELEVATED-TEMPERATURES; CYCLING PERFORMANCE; LITHIUM BATTERIES; SPINEL OXIDES; ELECTRODES; MECHANISMS; MN; STORAGE; FADE;

D O I：

10.1149/2.0731410jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Investigation of the failure mechanisms of Li-ion batteries and the consequences of their failure is of vital importance to the design of durable batteries. In this work, we examined the electrochemical performance of half and full Li-ion battery cells with several cathode materials including LiMn0.8Fe0 2PO4 (LMFP), LiNi0.5Mn1.5O4 (LMNO), and Li[LixNiyCozMn1-x-y-z]O-2 Li-rich layered oxides (HC-MNC). In contrast to half cells which demonstrated good cycling performance with more than 90% of their initial capacities retained after 100 cycles, the full cells exhibited severe capacity loss. Based on postmortem analyzes of electrodes from cells cycled at 30 and 60 degrees C, using electrochemical, spectroscopic, and microscopic techniques, we conclude that the loss of active lithium ions due to parasitic side reactions is a main reason for capacity fading of Li-ion battery full cells. Structural degradation of the electrodes during cycling is at best a second order effect. (C) 2014 The Electrochemical Society. All rights reserved.

引用

页码：A1672 / A1680

页数：9