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Title: Organic Solvent Free Process to Fabricate High Performance Silicon/Graphite Composite Anode

Abstract

Cycling stability is a key challenge for application of silicon (Si)-based composite anodes as the severe volume fluctuation of Si readily leads to fast capacity fading. The binder is a crucial component of the composite electrodes. Although only occupying a small amount of the total composite mass, the binder has major impact on the long-term electrochemical performance of Si-based anodes. In recent years, water-based binders including styrene-butadiene rubber (SBR) and carboxymethyl cellulose (CMC) have attracted wide research interest as eco-friendly and low-cost alternatives for the conventional poly(vinylidene difluoride) (PVDF) binder in Si anodes. In this study, Si-based composite anodes are fabricated by simple solid mixing of the active materials with subsequent addition of SBR and CMC binders. This approach bypasses the use of toxic and expansive organic solvents. The factors of binder, silicon, and graphite materials have been systematically investigated. It is found that the retained capacities of the anodes are more than 440 mAh/g after 400 cycles. These results indicate that organic solvent free process is a facile strategy for producing high performance silicon/graphite composite anodes.

Authors:
ORCiD logo; ORCiD logo; ; ;
Publication Date:
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1808616
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Published Article
Journal Name:
Journal of Composites Science
Additional Journal Information:
Journal Name: Journal of Composites Science Journal Volume: 5 Journal Issue: 7; Journal ID: ISSN 2504-477X
Publisher:
MDPI AG
Country of Publication:
Switzerland
Language:
English

Citation Formats

Fang, Chen, Xiao, Haiqing, Zheng, Tianyue, Bai, Hua, and Liu, Gao. Organic Solvent Free Process to Fabricate High Performance Silicon/Graphite Composite Anode. Switzerland: N. p., 2021. Web. doi:10.3390/jcs5070188.
Fang, Chen, Xiao, Haiqing, Zheng, Tianyue, Bai, Hua, & Liu, Gao. Organic Solvent Free Process to Fabricate High Performance Silicon/Graphite Composite Anode. Switzerland. https://doi.org/10.3390/jcs5070188
Fang, Chen, Xiao, Haiqing, Zheng, Tianyue, Bai, Hua, and Liu, Gao. Sat . "Organic Solvent Free Process to Fabricate High Performance Silicon/Graphite Composite Anode". Switzerland. https://doi.org/10.3390/jcs5070188.
@article{osti_1808616,
title = {Organic Solvent Free Process to Fabricate High Performance Silicon/Graphite Composite Anode},
author = {Fang, Chen and Xiao, Haiqing and Zheng, Tianyue and Bai, Hua and Liu, Gao},
abstractNote = {Cycling stability is a key challenge for application of silicon (Si)-based composite anodes as the severe volume fluctuation of Si readily leads to fast capacity fading. The binder is a crucial component of the composite electrodes. Although only occupying a small amount of the total composite mass, the binder has major impact on the long-term electrochemical performance of Si-based anodes. In recent years, water-based binders including styrene-butadiene rubber (SBR) and carboxymethyl cellulose (CMC) have attracted wide research interest as eco-friendly and low-cost alternatives for the conventional poly(vinylidene difluoride) (PVDF) binder in Si anodes. In this study, Si-based composite anodes are fabricated by simple solid mixing of the active materials with subsequent addition of SBR and CMC binders. This approach bypasses the use of toxic and expansive organic solvents. The factors of binder, silicon, and graphite materials have been systematically investigated. It is found that the retained capacities of the anodes are more than 440 mAh/g after 400 cycles. These results indicate that organic solvent free process is a facile strategy for producing high performance silicon/graphite composite anodes.},
doi = {10.3390/jcs5070188},
journal = {Journal of Composites Science},
number = 7,
volume = 5,
place = {Switzerland},
year = {Sat Jul 17 00:00:00 EDT 2021},
month = {Sat Jul 17 00:00:00 EDT 2021}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.3390/jcs5070188

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