硅-碳纳米管柔性复合负极的制备与性能  

Preparation and performance of NSi-CNTf flexible composite electrode

作　　者：吴昊 宋远强 李亚利 赵奇 WU Hao;SONG Yuan-qiang;LI Ya-li;ZHAO Qi(School of Materials and Science Engineering,Changzhou University,Changzhou,Jiangsu 213100,China;Institute of Flexible Electronics Technology of Tsinghua,Zhejiang,Jiaxing,Zhejiang 314001,China)

机构地区：[1]常州大学材料科学与工程学院,江苏常州213100 [2]浙江清华柔性电子技术研究院,浙江嘉兴314001

出　　处：《电池》2021年第5期450-454,共5页Battery Bimonthly

摘　　要：采用浮动催化化学气相沉积(FCCVD)法,将纳米硅颗粒(NSi)与碳纳米管(CNT)连续体原位复合,制备纳米硅-CNT复合膜(NSi-CNTf)柔性电极。借助SEM、能量色散谱(EDS)和电化学性能测试,分析电极的形貌特征和电化学性能。相较于传统Si/Cu电极,NSi-CNTf电极省去了浆料研磨、涂覆工艺,且具有良好的柔韧性和抗弯折性,比容量和循环性能均有提升。FCCVD法制备的NSi-CNTf柔性电极材料,纳米硅均匀分布在CNT薄膜的三维导电结构中,结合紧实,以0.2 A/g在0.01~2.00 V循环200次,比容量保持在790 mAh/g;在4.0 A/g下充放电,比容量保持在509 mAh/g。Floating catalytic chemical vapor deposition(FCCVD)method was used to in-situ combine nano-silicon particles(NSi)with the continuum of carbon nanotube(CNT)to prepare a nano-silicon-CNT composite film(NSi-CNTf)flexible electrode.By SEM,energy dispersive spectroscopy(EDS)and electrochemical performance tests,the morphology and electrochemical performance of this electrode were analyzed.Compared to traditional Si/Cu electrode,NSi-CNTf electrode eliminated the slurry grinding and coating processes,had good flexibility and bending resistance,its specific capacity and cycle performance were improved.The NSi-CNTf flexible electrode material prepared by the FCCVD method,nano-silicon was uniformly distributed in the three-dimensional conductive structure of the CNT film,the combination was tight.When cycled 200 times at 0.2 A/g in 0.01-2.00 V,the specific capacity remained at 790 mAh/g,when charged-discharged at 4.0 A/g,the specific capacity remained at 509 mAh/g.

关 键 词：硅-碳纳米管复合膜(NSi-CNTf) 浮动催化化学气相沉积(FCCVD) 柔性锂离子电池 

分 类 号：TM912.9[电气工程—电力电子与电力传动]