Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 22, Issue 22, Pages 11107-11112Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm30949a
Keywords
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Funding
- National Research Foundation of Korea [NRF-2009-0064488]
- Ministry of Education, Science and Technology
- Priority Research Centers Program [NRF-2011-0031392]
- WCU [R31-2008-10029]
- KBSI [P30402]
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This study shows that heat-treatment of colloidal inorganic nanoplates with columnar assembly under argon is a good strategy for development of anode materials. The heating of colloidal In2S3 nanoplates under argon resulted in the formation of film-like materials through interconnection of plates in a side by side manner. When the columnarly assembled colloidal In2S3 plates were heated at 400 degrees C under argon for 2 hours on graphene, more efficient anode materials with smaller diameters were obtained. Interestingly, the heat-treated columnarly assembled In2S3 plates on graphene had a layered structure, which was attributed to the possible existence of carbon materials between plates formed by the heat-treatment of surfactants under argon. The resultant graphene-In2S3 composites showed enhanced discharge capacities, up to 716-837 mA h g(-1), as well as excellent stabilities. In addition, the materials showed promising coulombic efficiencies and rate performances. We believe that, based on the strategy in this work, diverse graphene-inorganic nanomaterial composites with a layered structure can be prepared and applied as new anode materials in lithium ion batteries.
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