Preprint Communication Version 1 This version is not peer-reviewed

In-situ synthesize of graphene-Mn3O4 nanocomposites for high-rate pseduocapacitive electrodes

Version 1 : Received: 21 June 2018 / Approved: 22 June 2018 / Online: 22 June 2018 (10:53:49 CEST)

How to cite: Qiu, D.; Ma, X.; Zhang, J.; Zhao, B.; Lin, Z. In-situ synthesize of graphene-Mn3O4 nanocomposites for high-rate pseduocapacitive electrodes. Preprints 2018, 2018060354 (doi: 10.20944/preprints201806.0354.v1). Qiu, D.; Ma, X.; Zhang, J.; Zhao, B.; Lin, Z. In-situ synthesize of graphene-Mn3O4 nanocomposites for high-rate pseduocapacitive electrodes. Preprints 2018, 2018060354 (doi: 10.20944/preprints201806.0354.v1).

Abstract

Mn3O4 /graphene nanosheets (GNS) composites serve as very excellent electrode materials for supercapacitors. They can fully combine the advantages of two materials such as graphene and metal oxide. Meanwhile, they can improve not only the specific energy and specific power of the materials, but also the cyclic stability of the materials. The results of the cyclic voltammetry and constant current charge discharge test on the composite electrode material have shown that the Mn3O4 /GNS powder sample has good capacitive performance. When the scanning rate is 5~50mV, the specific capacity retention rate of the composite electrode is 80.3% and 88% respectively. Mn3O4 nanoparticles, with the highest ratio of network coated GNS, exhibit a specific capacitance value of 957.6 F g−1 at a current density of 2 A g−1 in 1 M Na2SO4 solution. Besides, its network structure demonstrates high specific capacity and multiplying performance.

Subject Areas

Graphene; Mn3O4; Nanocomposites; Energy storage and conversion; Supercapacitors

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