Enhancing the electrochemical performance of ZnO anode by novel additive of MoS2–SnO2 nanocomposite for the zinc alkaline battery application

C. Prabukumar, Sunil Meti, Udaya K. Bhat

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

ZnO nanorods and ZnO microrods are synthesized as the anode material for the Zn alkaline battery application. The present work studies the electrochemical performance of ZnO with regard to its size, morphology and MoS2–SnO2 nanocomposite as its additive towards the alkaline battery application. The properties, such as oxidation–reduction reaction, anti-corrosion behaviour, charge-transfer resistance and suppression of hydrogen evolution reaction (HER), are studied in detail. The structural characterization of ZnO samples is performed by using X-ray diffractometry. The morphological analysis of ZnO and MoS2–SnO2 nanocomposite is performed by using field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM), respectively. The atomic absorption spectroscopy (AAS) is employed to determine the solubility of ZnO samples in KOH solution. The electrochemical properties of the bare ZnO and the ZnO with MoS2–SnO2 additive (MoS2–SnO2/ZnO) samples are characterized by using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), cathodic polarization and Tafel polarization techniques. The ZnO with nanorod morphology shows better electrochemical performance than ZnO microrods and ZnO nanoparticles with sphere-like or plate-like morphology. The addition of MoS2–SnO2 nanocomposite with the ZnO improved the electrochemical activity, suppressed the HER activity and improved the anti-corrosion behaviour of the ZnO samples.

Original languageEnglish
Pages (from-to)2534-2549
Number of pages16
JournalJournal of Materials Science: Materials in Electronics
Volume33
Issue number5
DOIs
Publication statusPublished - 6 Jan 2022
Externally publishedYes

Bibliographical note

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This document is the author’s post-print version, incorporating any revisions agreed during the peer-review process. Some differences between the published version and this version may remain and you are advised to consult the published version if you wish to cite from it.

Funder

The author wants to thank the centralized research facility (CRF), NITK, for the FESEM characterization. The author is also thankful to Prof. B. Raj Mohan, Department of Chemical engineering, NITK, for the instrumentation of atomic absorption spectroscopy (AAS).

Keywords

  • Zn alkaline battery
  • ZnO anode
  • MoS2-SnO2 additive
  • nanorods
  • alkaline electrolyte

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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