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Towards High‐Performance Aqueous Sodium‐Ion Batteries: Stabilizing the Solid/Liquid Interface for NASICON‐Type Na 2 VTi(PO 4 ) 3 using Concentrated Electrolytes
Author(s) -
Zhang Huang,
Jeong Sangsik,
Qin Bingsheng,
Vieira Carvalho Diogo,
Buchholz Daniel,
Passerini Stefano
Publication year - 2018
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201800194
Subject(s) - electrolyte , fast ion conductor , aqueous solution , battery (electricity) , electrochemistry , materials science , electrode , energy storage , ion , interphase , chemical engineering , inorganic chemistry , chemistry , power (physics) , physics , organic chemistry , quantum mechanics , biology , engineering , genetics
Aqueous Na‐ion batteries may offer a solution to the cost and safety issues of high‐energy batteries. However, substantial challenges remain in the development of electrode materials and electrolytes enabling high performance and long cycle life. Herein, we report the characterization of a symmetric Na‐ion battery with a NASICON‐type Na 2 VTi(PO 4 ) 3 electrode material in conventional aqueous and “water‐in‐salt” electrolytes. Extremely stable cycling performance for 1000 cycles at a high rate (20 C) is found with the highly concentrated aqueous electrolytes owing to the formation of a resistive but protective interphase between the electrode and electrolyte. These results provide important insight for the development of aqueous Na‐ion batteries with stable long‐term cycling performance for large‐scale energy storage.