Preparation of Silicon-Antimony based Anode Materials for Lithium-Ion Batteries

Abstract

In this study, SixSb immiscible blend anode materials have been synthesized using micron-sized silicone and antimony particles in different compositions through chemical reduction-mechanical alloying method (CR-MA). The obtained microstructures have been investigated by X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM) with Energy Dispersive X-Ray Analysis (EDX). Spectroscopic characterizations have displayed that traditional intermetallic compounds cannot be achieved however a novel immiscible blend system can be. Si0.65Sb exhibits an initial capacity of 790 mAh g-1 and a good cyclic stability compared to the pure silicone. The battery performance results of the micron-sized Si0.65Sb blend system have been compared with graphite and the nano-sized Si/Sb alloy systems. It has been found that there is an improvement in cycling stability compared to nano-sized Si/Sb alloy systems and in specific capacity compared to commercial graphite anode material. This result obviously portrays the importance of micron sized Si/Sb system in large-scale applications due to its low cost.

Keywords:

Silicon-Antimony based materials; Negative electrode; Li-ion battery

DOI: 10.17350/HJSE19030000085

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Published
2018-04-06
Section
ENGINEERING