Studies of the Effect of Varying Vinylene Carbonate (VC) Content in Lithium Ion Cells on Cycling Performance and Cell Impedance

被引：147

作者：

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

Petibon, R. ^{[1
]}

Nelson, K. J. ^{[1
]}

Sinha, N. N. ^{[1
]}

Kassam, Adil ^{[2
]}

Way, B. M. ^{[2
]}

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

机构：

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

[2] E One Moli Energy Canada Ltd, Maple Ridge, BC V3X 9E7, Canada

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2013年 / 160卷 / 10期

基金：

加拿大自然科学与工程研究理事会;

关键词：

LI-ION; HIGH-PRECISION; TEMPERATURE; ADDITIVES; ELECTRODE; STORAGE; IMPACT;

D O I：

10.1149/2.031310jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

LiCoO2/graphite and Li[Ni1/3Mn1/3Co1/3]O-2/graphite pouch cells and Li[Ni1-x-yMnxCoy]O-2/graphite 18650 cells were made with varying concentrations of vinylene carbonate (VC) and studied using high precision coulometry, extended cycling as well as electrochemical impedance spectroscopy (EIS). As expected, adding increased concentrations of VC (up to 6 wt%) to the control electrolyte resulted in improved coulombic efficiency, decreased charge endpoint, slippage and longer cycle life. However, high concentrations of VC led to larger charge transfer resistance, especially at the graphite negative electrode. Understanding how varying amounts of VC impact cell lifetime and impedance allows for optimized electrolyte formulations to be found for different applications that may balance lifetime and power demands. (C) 2013 The Electrochemical Society. All rights reserved.

引用

页码：A1668 / A1674

页数：7

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