Hierarchical binder-free MnO2/TiO2 composite nanostructure on flexible seed graphite felt for high-performance supercapacitors

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

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Author(s)

  • Yihong Qu
  • Xin Tong
  • Chenhuan Yan
  • Yuzhao Li
  • Zhe Wang
  • Shaohui Xu
  • Dayuan Xiong
  • Lianwei Wang

Detail(s)

Original languageEnglish
Article number109648
Number of pages9
Journal / PublicationVacuum
Volume181
Online published24 Jul 2020
Publication statusPublished - Nov 2020

Abstract

Although titanium dioxide (TiO2) has excellent potential as electrode materials in supercapacitors, the low areal specific capacitance and poor conductivity have hindered further development. Herein, we describe a simple way to deposit manganese dioxide (MnO2) by a two-step hydrothermal method to improve the electrochemical properties. The hydrothermal process produces hierarchical manganese dioxide (MnO2) nanospheres and long tapered TiO2 nanorod arrays on porous seed graphite felt (SGF). The MnO2/TiO2/SGF electrode shows a high areal capacitance of 196.25 mF cm−2 at 1 mA cm−2 and after 5000 test cycles, 94.4% of the capacitance is retained indicating excellent cycle stability and good reversibility. The areal capacitance and cycle stability of MnO2/TiO2/SGF are better than TiO2/SGF and MnO2/GF, and the hierarchical nanocomposite has good prospects in high-performance supercapacitors.

Research Area(s)

  • Hierarchical composite nanostructure, MnO2, Seed graphite felt, Supercapacitors, Tapered TiO2 nanorod arrays

Citation Format(s)

Hierarchical binder-free MnO2/TiO2 composite nanostructure on flexible seed graphite felt for high-performance supercapacitors. / Qu, Yihong; Tong, Xin; Yan, Chenhuan; Li, Yuzhao; Wang, Zhe; Xu, Shaohui; Xiong, Dayuan; Wang, Lianwei; Chu, Paul K.

In: Vacuum, Vol. 181, 109648, 11.2020.

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