包覆型Si/C复合材料的制备及其性能研究

doi:10.61558/2993-074X.2083

电化学（中英文） ›› 2011, Vol. 17 ›› Issue (2): 139-143. doi: 10.61558/2993-074X.2083

包覆型Si/C复合材料的制备及其性能研究

杜莉莉1，庄全超1*，魏涛1，崔永丽1，孙智1，孙世刚2

1.中国矿业大学材料科学与工程学院锂离子电池实验室，江苏徐州 221116；
2. 厦门大学固体表面物理化学国家重点实验室，化学化工学院化学系，福建厦门 361005

收稿日期:2011-01-19 修回日期:2011-02-25 出版日期:2011-05-28 发布日期:2011-05-06
通讯作者: 庄全超 E-mail:zhuangquanchao@126.com
基金资助:
中央高校基本科研业务费专项资金(编号: 2010LKHX03、2010QNB04、2010QNB05) ，中国矿业大学科技攀登计划(编号: ON090237)项目资

Preparation and Performance of Carbon-coated Si/C Composites

Du Li-li1, ZHUANG Quan-chao1*, WEI Tao1, CUI Yong-li1, SUN Zhi1, SUN Shi-gang2

1.Li-ion Batteries Lab, School of Materials Science and Engineering, China University of Mining and technology, Xuzhou 221116, Jiangsu, China; 2. State Key Lab for Physical Chemistry of Solid Surfaces，Department of Chemistry，College of Chemistry and Chemical Engineering, Xiamen University，Xiamen 361005，Fujian, China

Received:2011-01-19 Revised:2011-02-25 Published:2011-05-28 Online:2011-05-06
Contact: ZHUANG Quan-chao E-mail:zhuangquanchao@126.com

摘要/Abstract

摘要： 分别采用球磨法和高温热解法制备了Si/C复合材料，XRD、SEM、电化学阻抗谱、循环伏安法和恒流充放电测试表征该Si/C复合材料的结构、形貌和电化学性能.结果表明，相比于球磨法，高温热解HDPE制备的Si/C复合材料颗粒形貌规则，碳的包覆较为均匀，导电性较好，阻抗较小.该复合材料首次嵌锂容量为4495 mAh/g，首次库仑效率65.3% ，从第2周开始库仑电效率都保持在97% 左右，经过100次充放电循环后仍能达到438 mAh/g的可逆容量，具有较好的电化学循环稳定性.

关键词: 锂离子电池, 硅, 高温热解法

Abstract: Si/C composite for lithium ion batteries was obtained by pyrolyzing and ball-milling. The microstructure and component of the composite was characterized by SEM and XRD, the electrochemical performance was investigated by electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and galvano static charge-discharge tests. The results illustrate that the particle of Si/C composite prepared by pyrolysis exhibits inerratic morphology, uniform carbon-coating layer, good electrical conductivity, low resistance. The first intercalated-lithium capacity of the composite material is 4495 mAh/g; the first coulomb efficiency is 65.3%. From the second week the coulomb efficiency maintains 97%, and the capacity at the 100th cycle can retain 438 mAh/g. The Si/C composite has good electrochemical cycle stability.

Key words: lithium battery, silicon, high temperature pyrolysis

中图分类号:

TM912.9

杜莉莉, 庄全超, 魏涛, 崔永丽, 孙智, 孙世刚. 包覆型Si/C复合材料的制备及其性能研究[J]. 电化学（中英文）, 2011, 17(2): 139-143.

Du Li-li, ZHUANG Quan-chao, WEI Tao, CUI Yong-li, SUN Zhi, SUN Shi-gang. Preparation and Performance of Carbon-coated Si/C Composites[J]. Journal of Electrochemistry, 2011, 17(2): 139-143.

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链接本文: https://electrochem.xmu.edu.cn/CN/10.61558/2993-074X.2083

https://electrochem.xmu.edu.cn/CN/Y2011/V17/I2/139

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包覆型Si/C复合材料的制备及其性能研究

Preparation and Performance of Carbon-coated Si/C Composites

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