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

74 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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Graphite
Graphene
Zinc
Catalysts
Air
Oxides
Nitrogen
Electrodes
Electrochemical impedance spectroscopy
Cathodes
Physical properties
Nanoparticles
X ray diffraction
Scanning electron microscopy

Keywords

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

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

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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.",
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AU - Prabu, Moni

AU - Ramakrishnan, Prakash

AU - Nara, Hiroki

AU - Momma, Toshiyuki

AU - Osaka, Tetsuya

AU - Shanmugam, Sangaraju

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N2 - 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.

AB - 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.

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