A Fully Sodiated NaVOPO4 with Layered Structure for High-Voltage and Long-Lifespan Sodium-Ion Batteries
Here, sodium-ion batteries are the primary candidate as 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. Herein, we report a cathode material, layered NaVOPO4, which exhibits high voltage (~3.5 V vs. Na/Na+), high discharge capacity (144 mAh g-1 at 0.05 C), and remarkable cyclability with 67% capacity retention over 1000 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 development of high energy density and long-life cathodes for electric storage applications.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC)
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1564445
- Alternate ID(s):
- OSTI ID: 1457371
- Journal Information:
- Chem, Journal Name: Chem Vol. 4 Journal Issue: 5; ISSN 2451-9294
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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