Enhanced ions and electrons transmission enables high-performance KxMnO@C cathode for hybrid supercapacitors

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Lina Chen
  • Xiaowen Zheng
  • Chongyang Hao
  • Pengchao Si
  • Lijie Ci
  • Jun Wei

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)16516-16521
Journal / PublicationCeramics International
Volume48
Issue number12
Online published11 Mar 2022
Publication statusPublished - 15 Jun 2022

Abstract

Manganese oxides have been regarded as one of the most promising electrode materials for energy storage systems. Especially, they can be used as battery-type electrodes in hybrid supercapacitors to achieve high energy density and power density at the same time. In such an application, the redox reaction on the battery-type electrodes needs to speed up to match the fast charging-discharging process of the counter capacitive electrodes. Herein, we intercalated K+ ions into MnO2 to enlarge the interlayer space as channels for ion diffusion, and coated the particles with carbon layer to achieve fast charging/discharging ability. The obtained KxMnO@C particles delivered a high specific capacitance of 1039 F g−1 in 5 M LiTFSI aqueous electrolyte. Coupled with activated carbon anode, the hybrid supercapacitor showed outstanding energy and power density.

Research Area(s)

  • Carbon coating, Hybrid capacitor, Manganese oxides

Citation Format(s)

Enhanced ions and electrons transmission enables high-performance KxMnO@C cathode for hybrid supercapacitors. / Chen, Lina; Zheng, Xiaowen; Hao, Chongyang; Sun, Qidi; Si, Pengchao; Ci, Lijie; Wei, Jun.

In: Ceramics International, Vol. 48, No. 12, 15.06.2022, p. 16516-16521.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review