Preparation of MnO<sub>2</sub>/coal-based graphene composites for supercapacitors

ZHANG Ya-ting; LI Jing-kai; LIU Guo-Yang; CAI Jiang-tao; ZHOU An-ning; QIU Jie-shan

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Article Navigation > New Carbon Mater. > 2016 > 31(5): 545-549

ZHANG Ya-ting, LI Jing-kai, LIU Guo-Yang, CAI Jiang-tao, ZHOU An-ning, QIU Jie-shan. Preparation of MnO2/coal-based graphene composites for supercapacitors. New Carbon Mater., 2016, 31(5): 545-549.

Citation:

ZHANG Ya-ting, LI Jing-kai, LIU Guo-Yang, CAI Jiang-tao, ZHOU An-ning, QIU Jie-shan. Preparation of MnO₂/coal-based graphene composites for supercapacitors. New Carbon Mater., 2016, 31(5): 545-549.

ZHANG Ya-ting, LI Jing-kai, LIU Guo-Yang, CAI Jiang-tao, ZHOU An-ning, QIU Jie-shan. Preparation of MnO2/coal-based graphene composites for supercapacitors. New Carbon Mater., 2016, 31(5): 545-549.

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Preparation of MnO₂/coal-based graphene composites for supercapacitors

1.
College of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China;
2.
Carbon Research Laboratory, State Key Lab of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China

Funds: National Natural Science Foundation of China (21276207, U1203292).

Received Date: 2016-06-29
Accepted Date: 2016-10-28
Rev Recd Date: 2016-09-20
Publish Date: 2016-10-28

Abstract

Abstract

The low-cost production of high performance functional materials based on graphene remains a challenging task. One of the options for tackling this problem is to develop new processes based on cheap starting materials such as coal. Coal-based graphene precursors were prepared from purified Taixi anthracite by catalytic graphitization combined with an improved Hummers method. These were mixed with MnO₂ and reduced by a low temperature plasma to make MnO₂/coal-based graphene nanocomposites. The composites were studied by FT-IR, XRD, TEM and SEM. Their electrochemical performance was evaluated using cyclic voltammetry and galvanostatic charge/discharge. Results show that MnO₂ has been even lydeposited on the graphene surface and the specific capacitance of the composite as an electrode in a supercapacitor is much higher than that of coal-based graphene without MnO₂. The highest capacitance is 281.1 F/g, which is 261.2% of the value for coal-based graphene.
- Taixi coal,
- Coal-based graphene,
- Electrochemical properties,
- Nanocomposites

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References(14)

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