Coralloid-like nanostructured c-nSi/SiOx@Cy anodes for high performance lithium ion battery

Zhuang, Xianhuan and Song, Pingan ORCID: https://orcid.org/0000-0003-1082-652X and Chen, Guorong and Shi, Liyi and Wu, Yuan and Tao, Xinyong and Liu, Hongjiang and Zhang, Dengsong (2017) Coralloid-like nanostructured c-nSi/SiOx@Cy anodes for high performance lithium ion battery. ACS Applied Materials and Interfaces, 9 (34). pp. 28464-28472. ISSN 1944-8244


Abstract

Balancing the size of the primary Si unit and void space is considered to be an effective approach for developing high performance silicon-based anode materials and is vital to create a lithium ion battery with high energy density. We herein have demonstrated the facile fabrication of coralloid-like nanostructured silicon composites (c-nSi/SiOx@Cy) via sulfuric acid etching the Al60Si40 alloy, followed by a surface growth carbon layer approach. The HRTEM images of pristine and cycled c-nSi/SiOx@Cy show that abundant nanoscale internal pores and the continuous conductive carbon layer effectively avoid the pulverization and agglomeration of Si units during multiple cycles. It is interesting that the c-nSi/SiOx@C4.0 anode exhibits a high initial Coulombic efficiency of 85.53%, and typical specific capacity of over 850 mAh g–1 after deep 500 cycles at a current density of 1 A g–1. This work offers a facile strategy to create silicon-based anodes consisting of highly dispersed primary nano-Si units.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 04 Apr 2019 00:12
Last Modified: 05 Apr 2019 00:55
Uncontrolled Keywords: anode; carbon; fabrication; lithium ion battery; silicon
Fields of Research (2008): 09 Engineering > 0912 Materials Engineering > 091299 Materials Engineering not elsewhere classified
Socio-Economic Objectives (2008): B Economic Development > 86 Manufacturing > 8699 Other Manufacturing > 869999 Manufacturing not elsewhere classified
Identification Number or DOI: https://doi.org/10.1021/acsami.7b05255
URI: http://eprints.usq.edu.au/id/eprint/35566

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