Stable High-Voltage Aqueous Zinc Battery Based on Carbon-Coated NaVPO 4 F Cathode

作者：Duan Bin, Yanrong Wang, Andebet Gedamu Tamirat, Peng Zhu, Beibei Yang, Jin Wang, Jianhang Huang, Yongyao Xia · 发表于：ACS Sustainable Chemistry & Engineering · 年份：2021 · DOI：10.1021/acssuschemeng.0c08651 · 被引用次数：42 · 研究领域：Advanced battery technologies research、Supercapacitor Materials and Fabrication、Advanced Battery Materials and Technologies

Rechargeable aqueous zinc-ion batteries (AZBs) are potentially considered as potential alternatives for large-scale stationary energy storage systems by taking advantage of their easy operating condition, low cost, safety, and environmental friendliness. Herein, we construct high-voltage and stable AZBs with a carbon-coated NaVPO 4 F cathode. A 15 M NaClO 4 + 1 M ZnCF 3 SO 3 solution enables the Na + and Zn 2+ co-insertion mechanism, and the high concentration suppresses vanadium dissolution with long-term stability. The carbon-coated NaVPO 4 F cathode displays a superior rate capability and exhibits a reversible capacity of 87.4 mAh g –1 and a capacity retention of 94.5% over 400 cycles at 0.1 A g –1 . Even at a higher current density of 1 A g –1, it demonstrates an ultralong lifetime of over 4000 cycles with a capacity retention of 89.3%. The highly reversible structural transformation that occurs during the electrochemical insertion/extraction process is evidenced by a series of ex situ XRD, Raman, and XPS analyses.