期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 2, 期 43, 页码 18208-18214出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta03788j
关键词
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资金
- National Science Foundation (NSF) [CMMI-1030048]
- University of Washington TGIF grant
- National Science Foundation - Earth Sciences [EAR-1128799]
- Department of Energy - GeoSciences [DE-FG02-94ER14466]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- State of Washington through the University of Washington Clean Energy Institute
Amorphous and nanocrystalline vanadium pentoxide (V2O5) were prepared through a combination of sol-gel processing paired with electrochemical deposition and investigated as cathodes for sodium-ion batteries. Amorphous V2O5 demonstrated superior electrochemical properties upon sodiation as compared to its crystalline counterpart. More specifically, amorphous vanadium pentoxide had a measured capacity of 241mA h g(-1), twice the capacity of its crystalline contemporary at 120 mA h g(-1). In addition, the amorphous vanadium pentoxide demonstrated a much higher discharge potential, energy density, and cycle stability. The development of amorphous materials could enable the usage and design of previously unexplored electrode materials; herein, the possible relationship between the improved sodiation properties and the amorphous structure is discussed.
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