Electrochemical impedance study of the solid electrolyte interphase in MnSn2 based anode for Li-ion batteries

被引：31

作者：

Mahmoud, Abdelfattah ^{[1
]}

Chamas, Mohamad ^{[1
]}

Lippens, Pierre-Emmanuel ^{[1
,2
]}

机构：

[1] Univ Montpellier, UMR CNRS 5253, Inst Charles Gerhardt, F-34095 Montpellier 5, France

[2] FR 3459 CNRS, Reseau Stockage Electrochim Energie RS2E, Paris, France

来源：

ELECTROCHIMICA ACTA | 2015年 / 184卷

关键词：

Electrochemical impedance spectroscopy; Solid electrolyte interphase; MnSn2; Electrode; Li-ion battery; LITHIUM-ION; AC-IMPEDANCE; ELECTRODE/ELECTROLYTE INTERFACE; KINETIC CHARACTERIZATION; REDUCTION-MECHANISMS; GRAPHITE-ELECTRODES; ETHYLENE CARBONATE; SI ANODES; INTERCALATION; SILICON;

D O I：

10.1016/j.electacta.2015.10.078

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

This work reports the interfacial properties of nanostructured MnSn2 as anode material for Li-ion batteries in order to explain ageing phenomena. The impedance measurements show variations of the solid electrolyte interphase (SEI) resistance during the first cycle that are interpreted from changes in thickness and/or porosity of the SEI film. These changes are mainly due to the degradation of the electrolyte at the beginning of the first discharge and to the de-alloying reaction of Li7Sn2 operating during the first part of the charge that causes strong volume variations. However, a rather stable SEI was obtained during the reformation of MnSn2 in the second part of the charge, which is peculiar to this compound. Finally, capacity fading is related to the continuous growth of the SEI during cycling. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：387 / 391

页数：5

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