化工学报 ›› 2020, Vol. 71 ›› Issue (6): 2804-2810.DOI: 10.11949/0438-1157.20200146

• 材料化学工程与纳米技术 • 上一篇    下一篇

柔性、自支撑CNT/Si复合薄膜的制备及储能性能

李靓晗(),简现龙,张森(),张明,孙玉平,王新昌   

  1. 郑州大学物理学院(微电子学院),材料物理教育部重点实验室,河南 郑州 450052
  • 收稿日期:2020-02-17 修回日期:2020-04-13 出版日期:2020-06-05 发布日期:2020-06-05
  • 通讯作者: 张森
  • 作者简介:李靓晗(1995—),女,硕士研究生,260569700@qq.com
  • 基金资助:
    国家自然科学基金项目(21501008)

Preparation and energy storage properties of flexible and self-supporting CNT/Si composite films

Lianghan LI(),Xianlong JIAN,Sen ZHANG(),Ming ZHANG,Yuping SUN,Xinchang WANG   

  1. Key Laboratory of Material Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, Henan, China
  • Received:2020-02-17 Revised:2020-04-13 Online:2020-06-05 Published:2020-06-05
  • Contact: Sen ZHANG

摘要:

开发了一种制备大面积CNT/Si柔性自支撑薄膜的方法,制备的CNT/Si复合薄膜尺寸可调且具有良好的柔性。作为锂离子电池负极,薄膜中硅的负载量对电极比容量及循环稳定性有显著影响。硅负载量为52%的CNT/Si复合电极表现出优良的电化学性能,1 A/g电流密度下电极充电比容量为1156 mA·h/g,循环200圈可逆充电比容量为975 mA·h/g,容量保持率达84%。

关键词: 纳米技术, 制备, 柔性, 自支撑, 硅负极, 复合材料

Abstract:

A method for preparing large-area CNT/Si flexible self-supporting film has been developed. The prepared CNT/Si composite film is adjustable in size and has good flexibility. As the anode of lithium-ion battery, the silicon load in the film has a significant effect on the specific capacity and cycle stability of the electrode. The CNT/Si composite electrode with 52% silicon load shows excellent electrochemical performance. The specific charge capacity of the electrode is 1156 mA·h/g at the current density of 1 A/g, 975 mA·h/g at the reversible charge capacity of 200 cycles, and the capacity retention rate is 84%.

Key words: nanotechnology, preparation, flexible, self-supporting, silicon anode, composite material

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