Abstract
In this paper, a promising electrode material for supercapacitor based on P-toluidine-reduced graphene oxide/Mn3O4 (GM) composite was successfully synthesized through a new one-pot synthesis route. To obtain GM composite, graphite oxide (GO) was reduced by P-toluidine first, and then, the resulting reduced graphene oxide (RGO) was hydrothermally treated accompanied with KMnO4 and K2SO4. The effect of K2SO4 on the microstructure and electrochemical performance of as-synthesized composites was investigated. At the weight feed ratio of the theoretical amount of Mn3O4 to GO is 13:1, the GM composite prepared with K2SO4 displays a network structure, but under the same conditions, GM composite prepared without K2SO4 presents a different-sized lumps structure closely piled up by Mn3O4 nanoparticles. A specific capacitance of the GM composite prepared with K2SO4 reaches to 331.6 F/g, almost two times higher than that of the composite prepared without K2SO4. Moreover, the specific capacitance retention of the composite is above 88% after 1000 cycles at 5.0 A/g.
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Funding
This study is financially supported by the National Natural Science Foundation of China (NSFC. 21664009, 51063003), the Ministry of Science and Technology project (No. 2009GJG10041), the Fundamental Research Funds for the Universities of Gansu (No. 1105ZTC136), the Natural Science Foundation of Gansu Province (No. 1208RJZA173).
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Chen, N., Hu, D., Wang, Y. et al. One-pot synthesis of P-toluidine-reduced graphene oxide/Mn3O4 composite and its electrochemical performance. J Solid State Electrochem 23, 1851–1860 (2019). https://doi.org/10.1007/s10008-019-04206-8
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DOI: https://doi.org/10.1007/s10008-019-04206-8