Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 163, Issue 2, Pages A131-A137Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.0381602jes
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Funding
- Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the U.S. Department of Energy under Advanced Battery Materials Research (BMR) Program [DE-AC02-05CH11231]
- Center for Electrochemical Energy Science (CEES), an Energy Frontier Research Center (EFRC) - U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-98CH10886]
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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 near-equilibrium voltages of glass-state conversion reactions in mixed polyanion glasses. (C) 2015 The Electrochemical Society.
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