吉林大学学报(理学版)

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Si/C复合纳米纤维负极材料的制备及其性能表征

屈超群1, 杜菲2, 王玉慧2, 别晓非2, 魏英进2   

  1. 1. 吉林师范大学 功能材料物理与化学教育部重点实验室, 吉林 四平 136000;2. 吉林大学 新型电池物理与技术教育部重点实验室, 长春 130012
  • 收稿日期:2013-09-28 出版日期:2013-11-26 发布日期:2013-11-21
  • 通讯作者: 屈超群 E-mail:chaoqun530@126.com

Synthesis and Characterization of Si/C CompositeNanofibers for LithiumIon Battery Anode

QU Chaoqun 1, DU Fei2, WANG Yuhui2, BIE Xiaofei2, WEI Yingjin2   

  1. 1. Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education,Jilin Normal University, Siping 136000, Jilin Province, China; 2. Key Laboratory of Advanced Batteries Physics and Technology of Ministry of Education, Jilin University, Changchun 130012, China
  • Received:2013-09-28 Online:2013-11-26 Published:2013-11-21
  • Contact: QU Chaoqun E-mail:chaoqun530@126.com

摘要:

以聚丙烯晴(PAN)作为高分子聚合物配体和碳源, 并添加少量纳米硅粉, 利用静电纺丝方法制备Si/C复合负极材料. 用热重分析(TG)研究前驱体的分解过程, 用X射线衍射(XRD)、 Raman光谱和扫描电子显微镜(SEM)研究Si/C复合材料的晶体结构和微观形貌. 结果表明: Si/C复合材料具有纳米纤维结构, 纤维直径约
为350 nm, 呈交错的网状分布; PAN高温分解产物多为无定形碳; 材料在0.1,0.2,0.5,1.0,2.0 C下的放电容量分别为735.6,712.1,685.4,492.3,367.9 mA·h/g, 其倍率性能较好.

关键词: 锂离子电池, 静电纺丝, 负极材料, 纳米纤维

Abstract:

Si/C composite anode material was successfully fabricated by electrospinning with PAN as macromolecule polymer collocation and carbon source. Decomposition process of the precursor was investigated by thermal gravimetric analysis (TG), and the structure and morphology of the asprepared samples were characterized by Xray diffraction (XRD), Raman spectrum and scanning electron microscope (SEM). The result shows that Si/C composite anode material is nanofiber structure. The fiber diameter is about 350 nm with distributing interlaced mesh. PAN decomposition products are mostly amorphous carbon at a high temperature. The electrochemical test results demonstrate that battery discharge capacities are respectively 735.6,712.1,685.4,492.3 and 367.9 mA·h/g at 0.1,0.2,0.5,1.0 and 2.0 C, and this material has very excellent rate performance.

Key words: lithiumion battery, electrostatic spinning, anode material, nanofiber

中图分类号: 

  • TM912.9