Journal
CHEMPLUSCHEM
Volume 78, Issue 8, Pages 843-851Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cplu.201300141
Keywords
graphene; lithium-ion batteries; manganese; microwave absorption; solvothermal methods
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Funding
- National Basic Research Program of China [2010CB934700]
- National Natural Science Foundation of China [11079002]
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Novel -MnS hollow spheres (MHSs) have been fabricated successfully by a one-pot template-free solvothermal method. The as-synthesized -MnS spheres have diameters of about 3-5m and porous shells of thickness about 0.5m composed of numerous nanocrystals. The samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and nitrogen adsorption. Time-dependent morphology evolution suggested that transformation of chemical components and Ostwald ripening play vital roles for these hollow structures with a porous shell. The possible formation mechanism for the fabrication of MHSs is proposed. Meanwhile, MHS-reduced graphene oxide (RGO) hybrids have been prepared in the presence of graphene oxide (GO) by using the same procedure. The amount of GO can affect the morphology of -MnS crystals in hybrids. The microwave absorption and lithium storage properties of the pure MHSs and MHS-RGO hybrids were studied in detail. Compared with pristine MHSs, the MHS-RGO hybrids possess remarkably enhanced microwave absorption and lithium storage properties. The enhanced microwave absorbing and electrochemical properties are also explained.
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