High-performance anode materials based on 3D orderly and vertically macroporous graphene-Si framework for Li-ion batteries
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Porous graphene/Si-MCP (microchannel plate) microstructures are fabricated using electrochemical exfoliation and microelectronic machining. The few-layer graphene nanosheets with a lateral size of 600–850 nm and thickness of 2–3 nm are uniformed anchored on the surface and channels of the Si-MCP substrate. The as-prepared graphene/Si-MCP is used as the anode in lithium ion batteries and demonstrated to have a higher reversible capacity, better cycling retention, and excellent higher rate cycling performance compared to graphene/Si and Si-MCP. The good properties are attributed to the large surface-to-volume ratio of the structure and the better electrical contact with graphene. This silicon-based composite has large potential as anodes in integrated batteries.
KeywordsGraphene/Si-MCP Anode Li-ion batteries Electrochemical exfoliation
This work was jointly supported by the Postdoctoral scientific research developmental fund of Heilongjiang Province (Grant No. LBH-Q15142, LBH-Q14157), Science and Technology Project of Qiqihar (Grant No. GYGG-201409, GYGG-201619), Higher School Science and Technology Achievements Industrialization Pre-Research and Development Foundation of Heilongjiang Province (Grant No. 1254CGZH04), University Nursing Program for Young Scholars with Creative Talents in Heilongjiang Province (Grant No. UNPYSCT-2016087), Scientific Research Foundation for the Returned Overseas Chinese Scholars in Heilongjiang Province, and Hong Kong Research Grants Council General Research Funds CityU 11301215.