Comparative Studies of Hardware Corrosion at High Potentials in Coin-Type Cells with Non Aqueous Electrolytes

被引：35

作者：

Sinha, Nupur Nikkan ^{[1
]}

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

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

Dahn, Jeff ^{[1
]}

机构：

[1] Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS B3H 4R2, Canada

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2011年 / 158卷 / 12期

基金：

加拿大自然科学与工程研究理事会;

关键词：

LITHIUM-ION BATTERIES; ALUMINUM; BEHAVIOR; LIPF6; SALT;

D O I：

10.1149/2.080112jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electrochemical stability of control and aluminum-sputtered coin cell cases was studied by chronoamperometry in 1 M LiPF(6) in ethylene carbonate/diethylcarbonate solution at various potentials vs Li/Li(+) and at various temperatures for extended times. Under anodic polarization, aluminum-sputtered cases demonstrated a stable behavior due to their passivation by surface films. The parasitic current developed on the control stainless steel case was about one order of magnitude larger than on the aluminum-sputtered cases at all potentials and temperatures studied. After 200 hours of potentiostatic hold, cells were opened and examined for corrosion. Al-sputtered cases showed no corrosion under any condition, while the control cases showed localized discolorations at 4.6 V vs Li/Li(+). The impact of these parasitic currents on high precision coulometry experiments using coin cell hardware is discussed. (C) 2011 The Electrochemical Society. [DOI: 10.1149/2.080112jes] All rights reserved.

引用

页码：A1400 / A1403

页数：4

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