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Na 2 TiV ( PO 4 ) 3 @C composite with excellent Na‐storage performance based on a solid‐state polymer electrolyte membrane
Author(s) -
Gao Wei,
Du Guangyuan,
Qi Yuruo,
Yang Qiuju,
Du Wenyan,
Xu Maowen
Publication year - 2021
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.6303
Subject(s) - electrolyte , battery (electricity) , sodium ion battery , sodium , cathode , fast ion conductor , materials science , composite number , chemistry , chemical engineering , quasi solid , composite material , electrode , organic chemistry , engineering , power (physics) , physics , quantum mechanics , faraday efficiency , dye sensitized solar cell
Summary Na 2 TiV(PO 4 ) 3 compound can be used as a cathode material for sodium‐ion battery for its good stability, high operating potential, and low material cost. In this work, a quasi‐solid sodium‐ion battery with Na 2 TiV(PO 4 ) 3 @C as the cathode and Na‐form perfluorinated sulfonic resin (PFSA‐Na) membrane as the solid electrolyte were assembled and tested. It is worth mentioning that compared with liquid electrolyte battery, the quasi‐solid sodium‐ion battery displays better cycle and rate performance. At a different current density of 50, 100, 200, 500, and 1000 mA g −1 , the quasi‐solid sodium‐ion battery shows specific capacities of 125, 110, 96, 73, and 45 mA h g −1 , respectively. And after 300 cycles, the specific capacity still remains ~90 mA h g‐ 1 , which is far better than liquid electrolyte battery (~70 mA h g ‐1 ). The good result is due to the assembly of quasi‐solid batteries and the application of PFSA‐Na solid electrolyte.