Zinc-air battery: Understanding the structure and morphology changes of graphene-supported CoMn2O4 Bifunctional catalysts under practical rechargeable conditions

Moni Prabu, Prakash Ramakrishnan, Hiroki Nara, Toshiyuki Momma, Tetsuya Osaka, Sangaraju Shanmugam

Research output: Contribution to journalArticle

89 Citations (Scopus)

Abstract

Nitrogen-doped/undoped thermally reduced graphene oxide (N-rGO) decorated with CoMn2O4 (CMO) nanoparticles were synthesized using a simple one-step hydrothermal method. The activity and stability of this hybrid catalyst were evaluated by preparing air electrodes with both primary and rechargeable zinc-air batteries that consume ambient air. Further, we investigated the relationship between the physical properties and the electrochemical results for hybrid electrodes at various cycles using X-ray diffraction, scanning electron microscopy, galvanodynamic charge-discharging and electrochemical impedance spectroscopy. The structural, morphological and electrocatalytic performances confirm that CMO/N-rGO is a promising material for safe, reliable, and long-lasting air cathodes for both primary and rechargeable zinc-air batteries that consume air under ambient condition.

Original languageEnglish
Pages (from-to)16545-16555
Number of pages11
JournalACS Applied Materials and Interfaces
Volume6
Issue number19
DOIs
Publication statusPublished - 2014 Oct 8

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Keywords

  • ambient condition
  • bifunctional catalyst
  • structural stability
  • surface morphology
  • zinc-air battery

ASJC Scopus subject areas

  • Materials Science(all)

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