硅-改性多壁纳米碳管柔性复合电极的制备和性能研究

doi:10.12028/j.issn.2095-4239.2018.0047

储能科学与技术 ›› 2018, Vol. 7 ›› Issue (3): 450-458.doi: 10.12028/j.issn.2095-4239.2018.0047

• 高比能量动力锂离子电池专刊 • 上一篇下一篇

硅-改性多壁纳米碳管柔性复合电极的制备和性能研究

余向南¹, 马天翼², 李慧玉³, 张文广³, 韩敏芳⁴, 邱新平⁵

1. 中国矿业大学化学与环境工程学院, 北京 100083;
2. 中国汽车技术研究中心, 天津市电动汽车评价技术企业重点实验室, 天津 300300;
3. 清华大学河北发展研究院, 北京 100084;
4. 清华大学热能工程系, 电力系统国家重点实验室, 北京 100084;
5. 清华大学化学系, 有机光电子与分子工程教育部重点实验室, 北京 100084

收稿日期:2018-03-28 修回日期:2018-04-12 出版日期:2018-05-01 发布日期:2018-04-17
通讯作者: 邱新平,教授,主要研究方向为锂离子电池,E-mail:qiuxp@mail.tsinghua.edu.cn
作者简介:余向南(1992-),女,硕士研究生,研究方向为柔性锂离子电池及硅负极,E-mail:yuxiangnan1992@163.com
基金资助:
国家重点基础研究发展计划（973计划）课题（2015CB251104）。

Preparation and properties of Si-PDCNT flexible composite anode

YU Xiangnan¹, MA Tianyi², LI Huiyu³, ZHANG Wenguang³, HAN Minfang⁴, QIU Xinping⁵

1. School of Chemical & Environmental Engineering, China University of Mining & Technology, Beijing 100083, China;
2. Tianjin Key Laboratory of Evaluation Technology for Electric Vehicles, China Automotive Technology and Research Center, Tianjin 300300, China;
3. Institute of Tsinghua University Hebei, Beijing 100084, China;
4. Department of thermal engineering, Tsinghua university, State Key Lab of Power Systems, Beijing 100084, China;
5. Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China

Received:2018-03-28 Revised:2018-04-12 Online:2018-05-01 Published:2018-04-17

摘要/Abstract

摘要： 利用多壁纳米碳管和纳米硅材料的各自优势，分别采取涂覆法和混合法，将硅与改性多壁碳纳米管（PDCNT）复合，制备了两种新型柔性电极（Si/PDCNT和Si@PDCNT）。借助扫描电子显微技术（SEM）、能谱分析技术（EDS）和电化学技术等表征测试手段，对比分析两种新型柔性电极的形貌和电化学性能。结果表明，涂覆法制备的Si/PDCNT复合电极，纳米Si均匀分布在PDCNT柔性薄膜集流体的表面，二者结合紧密；电极循环200周，比容量保持在170 mA·h/g左右，循环性能明显优于传统的Si/Cu电极。混合法制备的Si@PDCNT柔性复合电极，纳米Si均匀地分散在碳纳米管构筑的三维导电网络结构中，电极循环500周后，比容量保持在200 mA·h/g以上，循环性能优于Si/PDCNT电极。本研究有助于推动硅基纳米碳管柔性电极的应用，为高比能量柔性电池技术的研发提供实验依据。

关键词: 多壁纳米碳管, 纳米硅, 复合电极, 柔性锂离子电池

Abstract: Two kinds of flexible anodes (Si/PDCNT and Si@PDCNT) were prepared by the combination of silicon and multi-walled carbon nanotube (MWCNT), using coating and mixing methods according to the advantages of MWCNT and nanostructured silicon. The morphology and electrochemical properties of the flexible anodes were comparatively analyzed by means of scanning electron microscopy (SEM), energy spectrum analysis (EDS) and electrochemical analysis. Results show that in the Si/PDCNT anode, nanostructured silicon is evenly distributed on the surface of anode, and the Si and PDCNT are closely combined. Si/PDCNT anode delivered a specific capacity of 170 mA·h·g^-1 after 200 cycles,which is much better than traditional Si/Cu batteries. The Si@PDCNT anode prepared by the mixing method is evenly dispersed in the three-dimensional conductive network structure of PDCNTs. Si@PDCNT anode retained a specific capacity of 200 mA·h·g^-1 after 500 cycles, which is better than Si/PDCNT anode. This study is helpful to promote the application of flexible anode of silicon based carbon nanotubes, and provides experimental basis for the research and development of high specific energy flexible battery technology.

Key words: multi-walled carbon nanotube, nanostructured silicon, composite anode, flexible lithium ion battery

中图分类号:

TM911

余向南, 马天翼, 李慧玉, 张文广, 韩敏芳, 邱新平. 硅-改性多壁纳米碳管柔性复合电极的制备和性能研究[J]. 储能科学与技术, 2018, 7(3): 450-458.

YU Xiangnan, MA Tianyi, LI Huiyu, ZHANG Wenguang, HAN Minfang, QIU Xinping. Preparation and properties of Si-PDCNT flexible composite anode[J]. Energy Storage Science and Technology, 2018, 7(3): 450-458.

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硅-改性多壁纳米碳管柔性复合电极的制备和性能研究

Preparation and properties of Si-PDCNT flexible composite anode

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