Preparation and properties of Si-PDCNT flexible composite anode

doi:10.12028/j.issn.2095-4239.2018.0047

Energy Storage Science and Technology ›› 2018, Vol. 7 ›› Issue (3): 450-458.doi: 10.12028/j.issn.2095-4239.2018.0047

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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

Abstract

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

CLC Number:

TM911

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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Preparation and properties of Si-PDCNT flexible composite anode

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