Degradation Diagnostics for Commercial Lithium-Ion Cells Tested at-10°C

被引：32

作者：

Birkl, Christoph R. ^{[1
]}

McTurk, Euan ^{[2
]}

Zekoll, Stefanie ^{[3
]}

Richter, Felix H. ^{[3
]}

Roberts, Matthew R. ^{[3
]}

Bruce, Peter G. ^{[3
]}

Howey, David A. ^{[1
]}

机构：

[1] Univ Oxford, Dept Engn Sci, Oxford OX1 3PJ, England

[2] Univ Warwick, WMG, Coventry CV4 7AL, W Midlands, England

[3] Univ Oxford, Dept Mat, Oxford OX1 3PH, England

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2017年 / 164卷 / 12期

基金：

英国工程与自然科学研究理事会;

关键词：

IN-SITU DETECTION; GRAPHITE NEGATIVE ELECTRODES; SURFACE-CHEMISTRY; AGING MECHANISMS; POUCH CELLS; CYCLE-LIFE; BATTERIES; MODEL; QUANTIFICATION; TEMPERATURES;

D O I：

10.1149/2.1401712jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Degradation of lithium ion (Li-ion) cells affects both performance and safety of Li-ion batteries. In order to avoid potential safety hazards, it is crucial to detect the onset and extent of critical degradation modes in commercial Li-ion cells. This work demonstrates the application of a diagnostic algorithm to identify and quantify degradation modes of commercial Li-ion pouch cells cycled at -10 degrees C and a C-rate of 2 C. Rapid loss of active negative electrode material was successfully identified and results were validated using 3-electrode cells, scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). The positive electrode material was less strongly affected by the tests, as found by the diagnostic algorithm and confirmed with EDX and SEM results. (C) The Author(s) 2017. Published by ECS. All rights reserved.

引用

页码：A2644 / A2653

页数：10

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