Energy Storage Science and Technology ›› 2020, Vol. 9 ›› Issue (3): 797-806.doi: 10.19799/j.cnki.2095-4239.2019.0251

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Research progress of MnO2 binary composites based on supercapacitors

HOU Zhaoxia(), WANG Xiaohui, QU Chenying, WANG Jian   

  1. Laboratory of Micro-Nano Materials Research and Development, School of Mechanical Engineering, Shenyang University, Shenyang 110044, Liaoning, China
  • Received:2019-11-05 Revised:2020-01-06 Online:2020-05-05 Published:2020-05-11

Abstract:

As a typical pseudocapacitor material for supercapacitors, MnO2 has the advantages of low cost and high specific capacitance, but its electrochemical performance is degraded by poor conductivity and structural instability in the working process. At present, the electrochemical performance of MnO2 is improved by binary composites. This paper reviews the research progress on supercapacitor-based MnO2 and dual-layered MnO2, and pseudocapacitor binary composite materials. After analyzing and comparing the electrochemical performances of MnO2 binary composites, it is proposed that composite MnO2 and pseudo-capacitive materials, or composites with coreshell heterogeneous structures, are competitive candidates for improving the electrochemical performance.

Key words: manganese dioxide, composite materials, supercapacitor

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