Rapid Production of Mn?O?/rGO as an Efficient Electrode Material for Supercapacitor by Flame Plasma.

ABSTRACT: Benefiting from good ion accessibility and high electrical conductivity, graphene-based material as electrodes show promising electrochemical performance in energy storage systems. In this study, a novel strategy is devised to prepare binder-free Mn?O?-reduced graphene oxide (Mn?O?/rGO) electrodes. Well-dispersed and homogeneous Mn?O? nanosheets are grown on graphene layers through a facile chemical co-precipitation process and subsequent flame procedure. This obtained Mn?O?/rGO nanostructures exhibit excellent gravimetric specific capacitance of 342.5 F g-1 at current density of 1 A g-1 and remarkable cycling stability of 85.47% capacitance retention under 10,000 extreme charge/discharge cycles at large current density. Furthermore, an asymmetric supercapacitor assembled using Mn?O?/rGO and activated graphene (AG) delivers a high energy density of 27.41 Wh kg-1 and a maximum power density of 8 kW kg-1. The material synthesis strategy presented in this study is facile, rapid and simple, which would give an insight into potential strategies for large-scale applications of metal oxide/graphene and hold tremendous promise for power storage applications.

SUBMITTER: Zhou Y 

PROVIDER: S-EPMC6025293 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature