Dual-Function Air Cathode for Metal-Air Batteries with Pulse-Power Capability

Abstract

We demonstrate that air-breathing electrodes comprising carbon nanofoam papers painted with conformal nanoscale coatings of manganese oxide (MnOx ) exhibit both energy storage and conversion function by providing electrocatalytic activity for oxygen reduction plus faradaic pseudocapacitance associated with Mn(III/IV) redox in the oxide. This property combination, diffi cult to achieve in a single electrode material, allows the oxide-derived pseudocapacitance to sustain secondslong discharge pulses at rates that cannot be met by oxygen reduction alone. Manganese (III) sites in the post-pulsed oxide spontaneously recharge to Mn(IV) in the presence of oxygen making the oxide ready and available for subsequent pulsepower discharge.

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Document Details

Document Type
Technical Report
Publication Date
Jan 28, 2013
Accession Number
ADA606555

Entities

People

  • Christopher N Chervin
  • Debra R. Rolison
  • Eric S. Nelson
  • Jeffrey W Long
  • Nathan W. Kucko

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Breathing
  • Capacitance
  • Cells
  • Chemistry
  • Current Density
  • Electric Batteries
  • Electrochemical Capacitors
  • Electrochemical Energy Storage
  • Electrolytes
  • Energy
  • Energy Storage
  • Materials
  • Metal Air Batteries
  • Military Research
  • Oxides
  • Photoelectrochemical Cells
  • Storage

Readers

  • Electrochemical Engineering/ Fuel Cell Technologies
  • Electrochemical Surface Science