Electrochemical Investigations on Graphene and Lithium Phthalocyanine as Catalysts for Reversible Oxygen Reduction Reaction in Li-O2 Cells

Abstract

The theoretical energy density of Li-air battery is close to that of gasoline. One hurdle to implementation is electrochemistry of oxygen in non-aqueous electrolytes, including development of a suitable catalyst for reversible oxygen electrode for long cycle-life. Several reduced graphene oxide (RGO) preparations were tested in both aqueous and non-aqueous electrolytes using cyclic voltammetry and rotating disk electrode techniques. Studies were carried out using silver nano-particles (Ag-RGO), as well as gold (Au-RGO), palladium (Pd-RGO), iridium (Ir- RGO) and polypyrrole (PPY-RGO). Prototype cells were assembled and tested in charge and discharge at several current densities. Initial cycling shows a decrease in capacity, stabilizing after approximately 30 charge-discharge cycles. The results indicate that RGO based catalysts are appropriate for deriving high discharge capacity from rechargeable Li-O2 cells.

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Document Details

Document Type
Technical Report
Publication Date
May 11, 2015
Accession Number
ADA618080

Entities

People

  • Munichandraiah Nookala

Organizations

  • Indian Institute of Science, Bengaluru

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Chemical Reactions
  • Chemical Synthesis
  • Chemistry
  • Composite Materials
  • Conductive Polymers
  • Crystal Structure
  • Current Density
  • Electrochemistry
  • Electrodes
  • Graphitic Materials
  • Materials
  • Metallic Nanoparticles
  • Oxidation Reduction Reactions
  • Oxygen Electrodes
  • Particles
  • Physical Chemistry
  • Spectra

Fields of Study

  • Materials science

Readers

  • Battery Technology and Engineering
  • Electrochemical Engineering/ Fuel Cell Technologies
  • Nanocomposite Materials Science

Technology Areas

  • Microelectronics