High-Precision Differential Capacity Analysis of LiMn2O4/graphite Cells

被引：79

作者：

Smith, A. J. ^{[1
]}

Burns, J. C. ^{[1
]}

Dahn, J. R. ^{[1
]}

机构：

[1] Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS B3H 3J5, Canada

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2011年 / 14卷 / 04期

基金：

加拿大自然科学与工程研究理事会;

关键词：

LITHIUM-ION BATTERIES; VOLTAGE ANALYSES; HIGH-POWER; ELECTRODE; PERFORMANCE;

D O I：

10.1149/1.3543569

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The differential capacity and charge-discharge end points of a commercial LiMn2O4/graphite cell were examined using high precision constant-current chronopotentiometry and coulometry. The positive and negative electrodes from a fresh commercial cell were recovered and used to generate high precision "reference" potential-capacity data versus Li. The reference data were used to calculate differential capacity versus potential for "theoretical" LiMn2O4/graphite cells which could be perfectly matched to data from experiments on full cells. Matching was achieved primarily by relative "slippage" in capacity of the positive and negative potential-capacity curves. This allowed a detailed understanding of the aging processes and capacity fade of a full cell. (C) 2011 The Electrochemical Society. [DOI: 10.1149/1.3543569] All rights reserved.

引用

页码：A39 / A41

页数：3

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