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Gallium‐Doped α‐MnO2 Cathode for High‐Performance Aqueous Zinc‐Ion Batteriesстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Xu Wen‐yu, Kai‐zhao Wang, Qing‐yue Luo, Li Jun‐kai, Jue‐min Yan, Fang‐fang Xiao, Hao‐ran Wang, Sheng‐an Yang, Zhao‐wei Sun, V Evdokimov Pavel, O Kapitanova Olesya, Jin Hu, Feng Liu, Shi‐zhao Xiong
- Журнал: Rare Metals
- Том: 45
- Номер: 1
- Год издания: 2025
- Издательство: Chinese Society of Nonferrous Metal
- Местоположение издательства: China
- Номер статьи: e70020
- DOI: 10.1002/rar2.70020
- Аннотация: Rechargeable aqueous zinc-ion batteries (ZIBs) have received significant attention because of their high safety and low cost. MnO2 as a cathode material hampers the application of ZIBs due to its structural instability and dissolution during the operation of the battery. In this work, gallium (Ga) is successfully doped into the crystal structure of α-MnO2, which effectively stabilizes the tunneling structure of MnO2 and improves the conductivity of the bulk material. The Ga doping reduces the coordination numbers of Mn–O, Mn–Mnedge, and Mn–Mncorner shells to 4.4, 4.0, and 0.3, respectively, promoting the formation of Mn and O vacancies in the Ga@MnO2 material. Electrochemical charge/discharge processes show that Ga doping remarkably improves the transport rates of Zn2+ and H+, whereas the reaction products have an enhanced reversibility of deposition/dissolution. Therefore, the Ga@MnO2 cathode provides a capacity up to 352.7 mAh g−1 at 0.1 A g−1 and maintains a discharge capacity of 125.2 mAh g−1 even after 1500 cycles at 2 A g−1. Our work demonstrates that Ga doping is a facile strategy for enhancing the electrochemical performance of α-MnO2 by modifying the local structure, paving a way for further application of ZIBs.
- Добавил в систему: Евдокимов Павел Владимирович
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