Anchoring MnO2 on nitrogen-doped porous carbon nanosheets as flexible arrays cathodes for advanced rechargeable Zn–MnO2 batteries

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

2 Scopus Citations
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Author(s)

  • Yan Zhang
  • Shengjue Deng
  • Yahao Li
  • Bo Liu
  • Guoxiang Pan
  • Xiuli Wang
  • Xinhui Xia
  • Jiangping Tu

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)52-59
Journal / PublicationEnergy Storage Materials
Volume29
Online published10 Apr 2020
Publication statusPublished - Aug 2020

Abstract

Controllable construction of advanced Mn-based cathodes is of great importance for the development of flexible rechargeable Zn-MnO2 batteries. Herein we report an effective flexible composite strategy to construct integrated arrays cathodes by rationally anchoring active MnO2 on novel N-doped porous carbon nanosheets (N-CNSs) arrays grown on carbon cloth. Typically, hydrothermal-synthesized MnO2 nanoflakes are strongly anchored on the conductive N-CNSs skeleton forming flexible N-CNSs@MnO2 core/shell arrays. Interestingly, active Zn anode is also compatible with N-CNSs skeleton forming flexible integrated anode. Positive effects are demonstrated in the above N-CNSs@MnO2 core/shell arrays including good flexibility, high electrical conductivity, large porosity & specific surface area, and strong mechanical stability. Accordingly, the Zn ion storage kinetics is optimized in the obtained N-CNSs@MnO2 cathodes, which can deliver a high capacity of 303.7 ​mAh g−1 ​at 0.2 ​A ​g−1 and superior long-term lifespan (91.6% retention after 1800 cycles at 2 ​A ​g−1) in aqueous electrolyte. More importantly, the as-assembled flexible quasi-solid-state N-CNSs@MnO2//N-CNSs@Zn battery can exhibit a high energy density of 150.6 ​Wh kg−1 with a power density of 7.9 ​kW ​kg−1. Our work shows a novel carbon-based flexible design for construction of high-performance Zn-MnO2 devices.

Research Area(s)

  • Arrays, Flexibility, Manganese oxide, N-doped carbon nanosheets, Zn-MnO2 batteries

Citation Format(s)

Anchoring MnO2 on nitrogen-doped porous carbon nanosheets as flexible arrays cathodes for advanced rechargeable Zn–MnO2 batteries. / Zhang, Yan; Deng, Shengjue; Li, Yahao; Liu, Bo; Pan, Guoxiang; Liu, Qi; Wang, Xiuli; Xia, Xinhui; Tu, Jiangping.

In: Energy Storage Materials, Vol. 29, 08.2020, p. 52-59.

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