Journal
CHEM
Volume 4, Issue 5, Pages 1167-1180Publisher
CELL PRESS
DOI: 10.1016/j.chempr.2018.03.006
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Funding
- National Key Research Program of China [2016YFB0901500]
- National Science Foundation of China [21673165, 21333007]
- DOE Office of Science by Argonne National Laboratory [DE-AC02-06CH11357]
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Sodium-ion batteries are the primary candidate for a low-cost and resource abundant alternative to lithium-ion batteries for large-scale electric storage applications. However, the development of sodium-ion batteries is hindered by the lack of suitable cathode materials that have sufficient specific energy density and cycle life. Here, we report layered NaVOPO4 as a cathode material that exhibits high voltage (similar to 3.5 V versus Na/Na+), high discharge capacity (144 mAh g(-1) at 0.05 C), and remarkable cyclability with 67% capacity retention over 1,000 cycles. The excellent performances result from the high Na+ ion diffusion rate in the two-dimensional path and the reversible transformation behavior of (de)sodiation. Particularly, this layered structure and its synthetic procedure can be extended to other alkali-metal intercalation materials, leading to other metal-ion battery systems, which opens a new avenue for large-scale energy storage systems with the development of high-energy density and long-life cathodes for electric storage applications.
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