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

Zhuang, Xianhuan and Song, Pingan 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


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
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 : 09 Engineering > 0912 Materials Engineering > 091299 Materials Engineering not elsewhere classified
Socio-Economic Objective: B Economic Development > 86 Manufacturing > 8699 Other Manufacturing > 869999 Manufacturing not elsewhere classified
Identification Number or DOI: 10.1021/acsami.7b05255

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