Non‐Metal Ion Co‐Insertion Chemistry in Aqueous Zn/MnO2 Batteries

• Published in: Angewandte Chemie International Edition Vol. 60; no. 13; pp. 7056 - 7060
• Main Authors: Wang, Shuai, Yuan, Zishun, Zhang, Xu, Bi, Songshan, Zhou, Zhen, Tian, Jinlei, Zhang, Qichun, Niu, Zhiqiang
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 22-03-2021
• Edition: International ed. in English
• Subjects: aqueous batteries; Batteries; Cations; co-insertion; Diffusion rate; Electrochemical analysis; Electrochemistry; enhanced performance; Insertion; Ion diffusion; Manganese dioxide; Metal ions; non-metal ions; Rechargeable batteries; Synergistic effect; Zinc
• ISSN: 1433-7851; 1521-3773
• DOI: 10.1002/anie.202017098

The co‐insertion of dual ions can often offer enhanced electrochemical performance for the aqueous zinc batteries. Although the insertion of non‐metallic ions has been achieved in aqueous zinc batteries, the co‐insertion chemistry of non‐metallic cations is still a challenge. Here, a reversible H+/NH4+ co‐insertion/extraction mechanism was developed in an aqueous Zn/MnO2 battery system. The synergistic effect between the dual cations endows the aqueous batteries with the fast kinetics of ion diffusion and the reversible structure evolution of MnO2. As a result, the Zn/MnO2 battery displays excellent rate capability and cycling performance. This work will pave the way toward the design of aqueous rechargeable batteries with non‐metallic ions.
A reversible H+/NH4+ co‐insertion/extraction mechanism was developed in an aqueous Zn/MnO2 battery system. The co‐insertion of H+/NH4+ ions in MnO2 endows the aqueous batteries with the fast kinetics of ion diffusion and the reversible structure evolution of MnO2 due to the synergistic effect between the dual cations. As a result, such Zn/MnO2 batteries display enhanced electrochemical performance.