Mitigating the dissolution of V2O5 in aqueous ZnSO4 electrolyte through Ti-doping for zinc storage

Zihe Wei ¹Xuehua Wang ²Ting Zhu ³Ping Hu ⁴Liqiang Mai ⁵Liang Zhou⁵

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作者信息

1. Hubei Longzhong Laboratory,Wuhan University of Technology(Xiangyang Demonstration Zone),Xiangyang 441000,China;State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China;School of Materials Science and Engineering,Wuhan Institute of Technology,Wuhan 430205,China
2. School of Materials Science and Engineering,Wuhan Institute of Technology,Wuhan 430205,China
3. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China
4. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China;Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory,Xianhu Hydrogen Valley,Foshan 528200,China
5. Hubei Longzhong Laboratory,Wuhan University of Technology(Xiangyang Demonstration Zone),Xiangyang 441000,China;State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China;Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory,Xianhu Hydrogen Valley,Foshan 528200,China
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Abstract

Aqueous zinc-ion batteries(AZIBs)have become a hotspot for electrochemical energy storage owing to the high safety,low cost,environmental friendliness,and favorable rate performance.However,the seri-ous dissolution of cathode materials in aqueous electrolytes would lead to poor cyclability,which should be addressed before commercialization.Herein,we designed a Ti-doped V2O5 with yolk-shell microspher-ical structure for AZIBs.The Ti doping stabilizes the crystal structure and relieves the dissolution of V2O5 in aqueous ZnSO4 electrolyte.The optimized sample,Ti0.2V18O4.9,delivers a high capacity(355 mAh/g at 0.05 A/g)as well as good capacity retention(89％after 2500 cycles at 1.0 A/g).This work provides an ef-fective strategy to mitigate the dissolution of cathode material in aqueous ZnSO4 electrolyte for cyclability enhancement.

Key words

Aqueous zinc-ion batteries/V2O5 cathode materials/Aqueous ZnSO4 electrolyte/Yolk-shell structure/Ti doping

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基金项目

国家自然科学基金(52102299)

Independent Innovation Project of Hubei Longzhong Laboratory(2022ZZ-18)

Guangdong Basic and Applied Basic Research Foundation(2021A1515110059)

Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory(XHT2020-003)

出版年

2024

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCD

影响因子：0.771

ISSN：1001-8417

参考文献量3

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