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Author Su, Qingmei ♦ Yuan, Weiwei ♦ Yao, Libing ♦ Wu, Yishan ♦ Zhang, Jun ♦ Du, Gaohui
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ NANOSCIENCE AND NANOTECHNOLOGY ♦ COBALT OXIDES ♦ CURRENT DENSITY ♦ ELECTROCHEMISTRY ♦ ELECTRON MICROSCOPY ♦ GRAPHENE ♦ IRRADIATION ♦ LITHIUM ♦ LITHIUM ION BATTERIES ♦ LITHIUM IONS ♦ MICROWAVE RADIATION ♦ NANOCOMPOSITES ♦ NANOSTRUCTURES ♦ PERFORMANCE ♦ POROUS MATERIALS ♦ SHEETS ♦ SYNTHESIS
Abstract Highlights: • Co{sub 3}O{sub 4}–graphene nanocomposites are prepared by microwave irradiation method. • Co{sub 3}O{sub 4} nanosheets exhibit porous structure with the pore sizes of 3–6 nm. • The porous Co{sub 3}O{sub 4}–graphene nanocomposites show excellent electrochemical performance. • Synergistic effects of Co{sub 3}O{sub 4} and graphene improve the electrochemical performance. - Abstract: Porous Co{sub 3}O{sub 4} nanosheets anchored on graphene nanosheets were synthesized by microwave irradiation method. The obtained Co{sub 3}O{sub 4}–graphene sheet-on-sheet nanocomposite as an anode material for LIBs demonstrates a high initial discharge capacity of 1359.6 mAh g{sup −1} with a Columbic efficiency of 72.7% at a rate of 100 mA g{sup −1}. Moreover, a significantly enhanced reversible capacity of ∼1036.9 mAh g{sup −1} is retained after 50 cycles, and the capacity can reincrease to 1068 mAh g{sup −1} when the current density returns back to 100 mA g{sup −1} after cycled at various rates for 50 cycles. The improved electrochemical performance is attributed to the unique architectures of the porous Co{sub 3}O{sub 4} nanosheets and the incorporation of graphene nanosheets. Therefore, this nanocomposite is widely considered to be an attractive candidate as an anode material for next-generation LIBs.
ISSN 00255408
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-12-15
Publisher Place United States
Journal Materials Research Bulletin
Volume Number 72


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