柔性、自支撑CNT/Si复合薄膜的制备及储能性能  

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

作　　者：李靓晗 简现龙 张森[1] 张明[1] 孙玉平[1] 王新昌[1] LI Lianghan;JIAN Xianlong;ZHANG Sen;ZHANG Ming;SUN Yuping;WANG Xinchang(Key Laboratory of Material Physics of Ministry of Education,School of Physics and Microelectronics,Zhengzhou University,Zhengzhou 450052,Henan,China)

机构地区：[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

出　　处：《化工学报》2020年第6期2804-2810,共7页CIESC Journal

基　　金：国家自然科学基金项目(21501008)。

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%。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%.

关 键 词：纳米技术 制备 柔性 自支撑 硅负极 复合材料 

分 类 号：TM912[电气工程—电力电子与电力传动]