Effects of Electrolyte Composition and Voltage Scan Rate on Cyclic Performance of Silicon-Aluminum Anodes for Lithium-Ion Cells

被引：1

作者：

Bhattacharya, Sandeep ^{[1
]}

Alpas, Ahmet T. ^{[1
]}

机构：

[1] Univ Windsor, Dept Mech Automot & Mat Engn, Engn Mat Program, Windsor, ON N9B 3P4, Canada

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2017年 / 164卷 / 09期

基金：

加拿大自然科学与工程研究理事会;

关键词：

AMORPHIZATION PROCESSES; GRAPHITE ELECTRODE; BATTERY ANODES; IMPLANTED SI; LI; LITHIATION; CAPACITY; MECHANISMS; NANOSPHERES; PROPAGATION;

D O I：

10.1149/2.1321709jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Si-Al composite anodes, where micron-sized Si particles were embedded in a ductile Al matrix, were electrochemically cycled in ethylene carbonate (EC)- and propylene carbonate (PC)-based electrolytes vs. Li/Li+. When cycled in PC-based electrolytes, cracks were not formed in Si at a low voltage scan rate of 0.50 mVs(-1). However, cracks formed in Si when lithiated in EC-based electrolytes and these cracks were arrested by the surrounding Al-matrix and subsequently closed during de-lithiation. Lithiation at a high scan rate of 5.00 mVs(-1) increased the crack formation probability but in PC-based electrolytes, only a few cracks were formed and then closed during de-lithiation. The results suggest that composite Si-Al anodes, which do not pulverize like monolithic Si, could provide durable electrodes for Li-ion batteries-especially if they contain small Si particles (<10 mu m) and cycled in a PC-based electrolyte. (C) 2017 The Electrochemical Society. All rights reserved.

引用

页码：A2065 / A2074

页数：10

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