High-Performance Flexible Solid-State Ni/Fe Battery Consisting of Metal Oxides Coated Carbon Cloth/Carbon Nanofiber Electrodes

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

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  • Cao Guan
  • Wei Zhao
  • Yating Hu
  • Qingqing Ke
  • Xin Li
  • John Wang


Original languageEnglish
Article number1601034
Journal / PublicationAdvanced Energy Materials
Issue number20
Online published18 Jul 2016
Publication statusPublished - 26 Oct 2016
Externally publishedYes


Aqueous Ni/Fe batteries have great potential as flexible energy storage devices, owing to their low cost, low toxicity, high safety, and high energy density. However, the poor cycling stability has limited the widely expected application of Ni/Fe batteries, while the use of heavy metal substrates cannot meet the basic requirement for flexible devices. In this work, a flexible type of solid-state Ni/Fe batteries with high energy and power densities is rationally developed using needle-like Fe3O4 and flake-like NiO directly grown on carbon cloth/carbon nanofiber (CC–CF) matrix as the anode and cathode, respectively. The hierarchical CC–CF substrate with high electric conductivity and good flexibility serves as an ideal support for guest active materials of nanocrystalline Fe3O4 and NiO, which can effectively buffer the volume change giving rise to good cycling ability. By utilizing a gel electrolyte, a robust and mechanically flexible quasi-solid-state Ni/Fe full cell can be assembled. It demonstrates optimal electrochemical performance, such as high energy density (5.2 mWh cm−3 and 94.5 Wh Kg−1), high power density (0.64 W cm−3 and 11.8 KW Kg−1), together with excellent cycling ability. This work provides an example of solid-state alkaline battery with high electrochemical performance and mechanical flexibility, holding great potential for future flexible electronic devices.

Research Area(s)

  • aqueous Ni/Fe batteries, carbon nanofibers, flexible energy storage devices, metal oxides, solid-state batteries

Citation Format(s)