A Na3V2(PO4)2O1.6F1.4 Cathode of Zn‐Ion Battery Enabled by a Water‐in‐Bisalt Electrolyte
- 12 July 2020
- journal article
- research article
- Published by Wiley in Advanced Functional Materials
- Vol. 30 (36) , 2003511
Abstract
Aqueous zinc‐ion batteries are receiving increasing attention; however, the development of high‐voltage cathodes is limited by the narrow voltage window of conventional aqueous electrolytes. Herein, it is reported that Na3V2(PO4)2O1.6F1.4 exhibits the excellent performance, optimal to date, among polyanion cathode materials in a novel neutral water‐in‐bisalts electrolyte of 25 m ZnCl2 + 5 m NH4Cl. It delivers a reversible capacity of 155 mAh g−1 at 50 mA g−1, a high average operating potential of ≈1.46 V, and stable cyclability of 7000 cycles at 2 A g−1.Keywords
Funding Information
- National Science Foundation (CBET‐1551693)
- Natural Science Foundation of Beijing Municipality (L182023)
- National Natural Science Foundation of China (21975026)
- China Scholarship Council (201806030155)
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