高性能锂离子电池SiO/C/G复合负极材料研究

doi:10.3724/SP.J.1077.2013.12678

无机材料学报 ›› 2013, Vol. 28 ›› Issue (9): 943-948.DOI: 10.3724/SP.J.1077.2013.12678 CSTR: 32189.14.SP.J.1077.2013.12678

高性能锂离子电池SiO/C/G复合负极材料研究

石长川¹, 杨学林¹, 张露露¹, 周永涛¹, 温兆银²

(1. 三峡大学机械与材料学院, 宜昌443002; 2. 中国科学院上海硅酸盐研究所, 上海200050)

收稿日期:2012-11-07 修回日期:2013-02-22 出版日期:2013-09-20 网络出版日期:2013-08-14
作者简介:石长川(1987-), 男, 硕士研究生. E-mail: clbx0729@126.com
基金资助:
国家自然科学基金(50972075, 51272128); 湖北省杰出青年基金(2011CDA093)

High-performance SiO/C/G Composite Anode for Lithium Ion Batteries

SHI Chang-Chuan¹, YANG Xue-Lin¹, ZHANG Lu-Lu¹, ZHOU Yong-Tao¹, WEN Zhao-Yin²

(1. College of Mechanical and Material Engineering, Three Gorges University, Yichang 443002, China; 2. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China)

Received:2012-11-07 Revised:2013-02-22 Published:2013-09-20 Online:2013-08-14
About author:SHI Chang-Chuan. E-mail: clbx0729@126.com
Supported by:
National Natural Science Foundation of China(50972075, 51272128); Excellent Youth Foundation of Hubei Province (2011CDA093)

摘要/Abstract

摘要： 以一氧化硅、蔗糖及天然石墨为原料, 通过高能球磨和热解工艺制备了电化学性能优异的SiO/C/G复合负极材料。采用X射线衍射仪(XRD)和扫描电子显微镜(SEM)对复合材料的物相和形貌进行了表征。所制备的复合材料中, 纳米SiO颗粒(＜50 nm＝被无定形碳粘结并均匀分散在石墨鳞片上。电化学性能测试表明, 该复合材料100次循环后, 可逆容量高达1108.9 mAh/g, 容量保持率为103.8%。优异的电化学性能主要归因于纳米SiO颗粒在无定形碳基体中的均匀分布、无定形碳基体的缓冲作用和石墨相对复合材料导电性能的改善。

关键词: SiO/C/G, 天然石墨, 负极, 锂离子电池

Abstract: Silicon monoxide/carbon/graphite (SiO/C/G) composite with high capacity and excellent cycling performance has been successfully synthesized via high-energy mechanical milling and followed pyrolysis of silicon monoxide/sucrose/natural graphite mixture. The phase composition and morphology of the samples were characterized by X-ray diffractometer (XRD) and scanning electron microscope (SEM). Nano-sized (<50 nm) SiO particles were bonded by amorphous carbon and homogenously dispersed on graphite flakes in the as-prepared composite. After 100 cycles, the composite electrode kept a reversible capacity of 1108.9 mAh/g with the capacity retention of 103.8%. Uniform distribution of SiO particles in the amorphous carbon matrix, better buffering effect of carbon matrix and enhanced electrical conductivity are responsible for the superior electrochemical performance.

Key words: SiO/C/G, natural graphite, anode, lithium ion battery

中图分类号:

TQ174

石长川, 杨学林, 张露露, 周永涛, 温兆银. 高性能锂离子电池SiO/C/G复合负极材料研究[J]. 无机材料学报, 2013, 28(9): 943-948.

SHI Chang-Chuan, YANG Xue-Lin, ZHANG Lu-Lu, ZHOU Yong-Tao, WEN Zhao-Yin. High-performance SiO/C/G Composite Anode for Lithium Ion Batteries[J]. Journal of Inorganic Materials, 2013, 28(9): 943-948.

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高性能锂离子电池SiO/C/G复合负极材料研究

High-performance SiO/C/G Composite Anode for Lithium Ion Batteries

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