Flexible free-standing Na4Mn9O18/reduced graphene oxide composite film as a cathode for sodium rechargeable hybrid aqueous battery

Guanghui Yuan, Jiming Xiang, Huafeng Jin, Yanzi Jin, Lizhou Wu, Yongguang Zhang, Almagul Mentbayeva, Zhumabay Bakenov

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A novel free-standing Na4Mn9O18/reduced graphene oxide (NMO-RGO) composite was successfully prepared by a facile vacuum filtration technique. Scanning and transmission electron microscopy studies revealed formation of a film with needle-like Na4Mn9O18 homogeneously distributed and anchored on the RGO matrix. A sodium rechargeable hybrid aqueous battery with this novel cathode and zinc anode was first investigated and reported. The NMO-RGO film delivered a reversible discharge capacity of about 83 mAh g−1 when cycled galvanostatically at a current density of 0.1 A g−1, which was for about 78% higher than that of Na4Mn9O18 prepared by a slurry casting technique. This significant enhancement of electrochemical properties of NMO-RGO was due to the presence of graphene sheets in this free-standing composite cathode. These sheets form an agile substrate with a high conductivity to guarantee a successive electronic conduction channels in the electrode. In the same time, such composition and structure enables accommodation of the volume changes of Na4Mn9O18 during sodium insertion-extraction.

Original languageEnglish
Pages (from-to)647-654
Number of pages8
JournalElectrochimica Acta
Volume259
DOIs
Publication statusPublished - Jan 1 2018

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Graphite
Composite films
Graphene
Oxide films
Cathodes
Sodium
Oxides
Composite materials
Electrochemical properties
Needles
Zinc
Anodes
Casting
Current density
Vacuum
Transmission electron microscopy
Scanning electron microscopy
Electrodes
Substrates
Chemical analysis

Keywords

  • Cathode material
  • Composite film
  • Free-standing electrode
  • NaMnO/reduced graphene oxide
  • Rechargeable hybrid aqueous battery

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

Cite this

Flexible free-standing Na4Mn9O18/reduced graphene oxide composite film as a cathode for sodium rechargeable hybrid aqueous battery. / Yuan, Guanghui; Xiang, Jiming; Jin, Huafeng; Jin, Yanzi; Wu, Lizhou; Zhang, Yongguang; Mentbayeva, Almagul; Bakenov, Zhumabay.

In: Electrochimica Acta, Vol. 259, 01.01.2018, p. 647-654.

Research output: Contribution to journalArticle

Yuan, Guanghui ; Xiang, Jiming ; Jin, Huafeng ; Jin, Yanzi ; Wu, Lizhou ; Zhang, Yongguang ; Mentbayeva, Almagul ; Bakenov, Zhumabay. / Flexible free-standing Na4Mn9O18/reduced graphene oxide composite film as a cathode for sodium rechargeable hybrid aqueous battery. In: Electrochimica Acta. 2018 ; Vol. 259. pp. 647-654.
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