Mixed polyanion glass cathodes: Glass-state conversion reactions

A. K. Kercher, J. A. Kolopus, K. J. Carroll, R. R. Unocic, S. Kirklin, Christopher M Wolverton, S. L. Stooksbury, L. A. Boatner, N. J. Dudney

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Mixed polyanion glasses can undergo glass-state conversion (GSC) reactions to provide an alternate class of high-capacity cathode materials. GSC reactions have been demonstrated in phosphate/vanadate glasses with Ag, Co, Cu, Fe, and Ni cations. These mixed polyanion glasses provided high capacity and good high power performance, but suffer from moderate voltages, large voltage hysteresis, and significant capacity fade with cycling. Details of the GSC reaction have been revealed by X-ray absorption spectroscopy, electron microscopy, and energy dispersive X-ray spectroscopy of ex situ cathodes at key states of charge. Using the Open Quantum Materials Database (OQMD), a computational thermodynamic model has been developed to predict the nearequilibrium voltages of glass-state conversion reactions in mixed polyanion glasses.

Original languageEnglish (US)
Pages (from-to)A131-A137
JournalJournal of the Electrochemical Society
Volume163
Issue number2
DOIs
StatePublished - Jan 1 2016

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Materials Chemistry
  • Electrochemistry

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