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Volume 4, Issue 1, June 2020, Page: 1-7
Walnut Inspired Silicon Carbon Composites for Stable Lithium Ions Battery Anodes
Xuli Ding, School of Science, Jiangsu University of Science and Technology, Zhenjiang, The People’s Republic of China
Daowei Liang, School of Science, Jiangsu University of Science and Technology, Zhenjiang, The People’s Republic of China
Yi Liu, Shanghai Synchrotron Radiation Facility, Chinese Academy of Science, Shanghai, The People’s Republic of China
Received: Nov. 29, 2019;       Accepted: Dec. 21, 2019;       Published: Jan. 6, 2020
DOI: 10.11648/      View  166      Downloads  79
The distinct quality of silicon (Si) makes it a natural choice for employment as a competitive anode material in rechargeable high specific energy lithium-ion batteries (LIBs) for practical applications. However, the Si-based LIBs are still hindered for practical applications due to the weak electrical conductivity and unstable solid electrolyte interfaces (SEI). New structures with enhanced conduction are highly desired to push the advance of Si-based LIBs. Herein, the Si nanoparticles coated by few-layer graphene (fGra) has been wrapped into honeycomb porous carbon (Pc) framework with good Si-C contact and reliable void via a simple chemical vapor deposition accompanying with freeze drying strategy. The walnut-type structure noted as Si@Gra@Pc is obtained, in which the porous architecture not only shorten the transfer distance of the lithium ions but also provide good electrical conductivity for the charge carriers. Moreover, the porous structure permit the free expansion of Si during charging/discharging cycling and preserve the integrity of the electrode owing to the brawny mechanical strength of Gra and Pc framework. Importantly, it is found that the Si@Gra@Pc composites show good rate capability reached to 5Ag-1 with specific capacity of 450 mAh g-1 and good cycling stability with no distinct capacity decay even after 1000 cycles, which are obvious improving compared with that of the bare Si anodes. Combined with the simple and feasible fabrication method and improved electrochemical performance for the Si anodes in LIBs. The present walnut-type Si@Gra@Pc composite is considered as the promising and meaningful Si-based anode materials and candidates in the development of next-generation high specific energy LIBs.
Silicon, Lithium-ion Battery, Anode, Graphene, CVD
To cite this article
Xuli Ding, Daowei Liang, Yi Liu, Walnut Inspired Silicon Carbon Composites for Stable Lithium Ions Battery Anodes, Composite Materials. Vol. 4, No. 1, 2020, pp. 1-7. doi: 10.11648/
Copyright © 2020 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License ( which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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