New insights into the silicon-based electrode's irreversibility along cycle life through simple gravimetric method

被引：92

作者：

Mazouzi, D. ^{[1
,2
]}

Delpuech, N. ^{[1
]}

Oumellal, Y. ^{[1
]}

Gauthier, M. ^{[1
,2
]}

Cerbelaud, M. ^{[1
]}

Gaubicher, J. ^{[1
]}

Dupre, N. ^{[1
]}

Moreau, P. ^{[1
]}

Guyomard, D. ^{[1
]}

Roue, L. ^{[2
]}

Lestriez, B. ^{[1
]}

机构：

[1] Univ Nantes, CNRS, Inst Mat Jean Rouxel IMN, F-49322 Nantes 3, France

[2] INRS Varennes, Ctr Energie Mat & Telecommun EMT, Varennes, PQ, Canada

来源：

JOURNAL OF POWER SOURCES | 2012年 / 220卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Lithium battery; Silicon; Electrode; Liquid electrolyte; Binder; LITHIUM-ION BATTERIES; SOLID-ELECTROLYTE; FLUOROETHYLENE CARBONATE; ELECTROCHEMICAL PERFORMANCE; SURFACE-CHEMISTRY; ANODES; SI; INTERPHASE; STABILIZATION; POWDER;

D O I：

10.1016/j.jpowsour.2012.08.007

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The electrolyte degradation process on nano Si-based negative electrodes prepared with a carboxymethylcellulose (CMC) binder is studied by comparing the irreversible loss to ex-situ measurements of the weight and the thickness of the electrode along cycling. The electrode thickness and mass increase in close relationship to the irreversible loss increase, due to the continuous accumulation of insoluble electrolyte degradation products in the Si electrode. The use of a pH 3 buffer solution during the slurry electrode preparation, and the presence of fluoroethylene carbonate (FEC) + vinylidene carbonate (VC) results in much less electrolyte decomposition. The double role of the CMC binder with respect to the mechanical and chemical stability of the composite electrode is highlighted. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：180 / 184

页数：5

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