Porous manganese dioxide nanosheets on modified graphite felt for cathodes in high-capacity flexible Zinc-MnO2 batteries

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

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Author(s)

  • Chenhuan Yan
  • Xin Tong
  • Yihong Qu
  • Yang Zhou
  • Ning Pang
  • Shaohui Xu
  • Dayuan Xiong
  • Lianwei Wang

Detail(s)

Original languageEnglish
Article number110353
Journal / PublicationVacuum
Volume191
Online published2 Jun 2021
Publication statusPublished - Sep 2021

Abstract

Modified graphite felt (MGF) is a flexible substrate with many advantages and a simple one-step method involving HNO3 is designed to activate graphite felt by increasing the amount of oxygen-containing functional groups and mesopores. Owing to the etching effect, excellent hydrophilicity beneficial to loading of α-MnO2 is achieved to facilitate the formation of MnO2/MGF. The MnO2/MGF structure serves as the cathode in a flexible Zn//MnO2 battery which also consists of a cross-linked polyacrylamide hydrogel as the electrolyte and separator and a Zn flake as the anode. The flexible Zn–MnO2 battery has excellent energy storage behaviors and cycling durability such as a high areal capacity of 1.26 mA h cm−2 at 4 mA cm−2 as well as capacity retention of 99.8% over 1000 cycles. Furthermore, the battery provides a remarkable energy density of 1.82 mW h cm−2 at a power density of 3.7 mW cm−2. The modification strategy and materials have large potential in wearable and flexible devices.

Research Area(s)

  • Flexible devices, Graphite felt, Oxygen-containing functional groups, Surface modification, Zn–MnO2 battery

Citation Format(s)

Porous manganese dioxide nanosheets on modified graphite felt for cathodes in high-capacity flexible Zinc-MnO2 batteries. / Yan, Chenhuan; Tong, Xin; Qu, Yihong; Zhou, Yang; Pang, Ning; Xu, Shaohui; Xiong, Dayuan; Wang, Lianwei; Chu, Paul K.

In: Vacuum, Vol. 191, 110353, 09.2021.

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