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Title: A Fully Sodiated NaVOPO 4 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 NaVOPO 4, 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.
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [1] ;  [1] ;  [1] ;  [1] ;  [5] ;  [2] ;  [2] ;  [2] ;  [4] ;  [2] ;  [2]
  1. Wuhan Univ., Wuhan (China)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
  3. Wuhan Univ. of Technology, Wuhan (China)
  4. Univ. of Science and Technology Beijing, Beijing (China)
  5. Indiana Univ.-Purdue Univ., Indianapolis, IN (United States)
Publication Date:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Additional Journal Information:
Journal Volume: 4; Journal Issue: 5; Journal ID: ISSN 2451-9294
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Scientific User Facilities Division; National Key Research and Development Program of China; National Natural Science Foundation of China (NNSFC)
Country of Publication:
United States
25 ENERGY STORAGE; 36 MATERIALS SCIENCE; NaVOPO4; layered structure; long lifespan; sodium-ion batteries; cathode material; energy storage
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