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Issue 36, 2013
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The mechanistic exploration of porous activated graphene sheets-anchored SnO2 nanocrystals for application in high-performance Li-ion battery anodes

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Abstract

Porous activated graphene sheets have been for the first time exploited herein as encapsulating substrates for lithium ion battery (LIB) anodes. The as-fabricated SnO2 nanocrystals–porous activated graphene sheet (AGS) composite electrode exhibits improved electrochemical performance as an anode material for LIBs, such as better cycle performance and higher rate capability in comparison with graphene sheets, activated graphene sheets, bare SnO2 and SnO2graphene sheet composites. The superior electrochemical performances of the designed anode can be ascribed to the porous AGS substrate, which improves the electrical conductivity of the electrode, inhibits agglomeration between particles and effectively buffers the strain from the volume variation during Li+-intercalation–de-intercalation and provides more cross-plane diffusion channels for Li+ ions. As a result, the designed anode exhibits an outstanding capacity of up to 610 mA h g−1 at a current density of 100 mA g−1 after 50 cycles and a good rate performance of 889, 747, 607, 482 and 372 mA h g−1 at a current density of 100, 200, 500, 1000, and 2000 mA g−1, respectively. This work is of importance for energy storage as it provides a new substrate for the design and implementation of next-generation LIBs exhibiting exceptional electrochemical performances.

Graphical abstract: The mechanistic exploration of porous activated graphene sheets-anchored SnO2 nanocrystals for application in high-performance Li-ion battery anodes

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Publication details

The article was received on 04 Jul 2013, accepted on 09 Jul 2013 and first published on 07 Aug 2013


Article type: Paper
DOI: 10.1039/C3CP52808A
Citation: Phys. Chem. Chem. Phys., 2013,15, 15098-15105
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    The mechanistic exploration of porous activated graphene sheets-anchored SnO2 nanocrystals for application in high-performance Li-ion battery anodes

    Y. Yang, X. Ji, F. Lu, Q. Chen and C. E. Banks, Phys. Chem. Chem. Phys., 2013, 15, 15098
    DOI: 10.1039/C3CP52808A

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