期刊
JOULE
卷 2, 期 11, 页码 2348-2363出版社
CELL PRESS
DOI: 10.1016/j.joule.2018.07.027
关键词
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资金
- National Key Technologies R&D Program, China [2016YFB0901500]
- National Natural Science Foundation of China [51672275, 51421002]
- Beijing Natural Science Foundation [2182074]
- US Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Office
- US DOE, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- DOE Office of Science, UChicago Argonne [DE-AC02-06CH11357]
The large-scale application of rechargeable batteries in electric vehicles and energy-storage systems is still hindered by their high cost, particularly from the active materials. Here we proposed a concept of integration of extraction-separation and materials-preparation to further reduce the materials' cost. The power of this concept was demonstrated by the large-scale room-temperature synthesis (150 g per batch) of multi-shelled Na-3(VOPO4)(2)F microspheres based on in situ generated bubbles as soft templates. The as-prepared Na-3(VOPO4)(2)F shows superior rate capability with discharge capacity of 81 mAh g(-1) at 15 C current rate and capacity retention of 70% after 3,000 cycles. Ex situ UV-vis was first employed to characterize the variation of oxidation state for vanadium during the charging and discharging process. This is the first report of a rapid and facile large-scale room-temperature controllable synthesis of Na-3(VOPO4)(2)F microspheres, and this approach could be extended to synthesize other similar compounds.
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