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Hierarchical Mg-Birnessite Nanowall Arrays with Enriched (010) Planes for High Performance Aqueous Mg-Ion Batteriesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 3 февраля 2022 г.
- Авторы: Shi Zhengyi, Xue Liang, Wu Jianghua, Guo Qiubo, Xia Qiuying, Ni Mingzhu, Wang Peng, Savilov Serguei V., Aldoshin Sergey M., Zan Feng, Xia Hui
- Журнал: Journal of the Electrochemical Society
- Том: 168
- Номер: 12
- Год издания: 2021
- Издательство: Electrochemical Society, Inc.
- Местоположение издательства: United States
- Первая страница: 120549
- DOI: 10.1149/1945-7111/ac4548
- Аннотация: Birnessite MnO2 is a promising cathode material for aqueous Mg-ion batteries due to its layered structure with large interlayer distance. However, the two-dimensional growth mode of birnessite induces nanosheet morphology with preferred growth of inactive (001) planes with sluggish ion transport kinetics. In this work, a high Mg content birnessite with hierarchical nanowall arrays morphology is prepared by in situ electro-conversion using spinel Mn3O4 nanowall arrays. The electro-conversion Mg-birnessite (ECMB) nanowall arrays are assembled by ultrasmall nanosheets with reduced (001) planes but increased active (010) planes, affording enriched open intercalation channels and shortened Mg2+ diffusion length. Consequently, the ECMB cathode exhibits a large specific reversible capacity of about 255.1 mAh g-1 at a current density of 200 mA g-1, and outstanding cycling stability with 73.6% capacity retention after 3000 cycles. Finally, a 2.2 V aqueous full cell is constructed by using ECMB as positive electrode and polyimide as negative electrode, which achieves a high energy density of 65.2 Wh kg-1 at a power density of 96 W kg-1. This work demonstrates effective crystal plane modulation for Mg-birnessite to achieve superior Mg2+ storage in aqueous batteries.
- Добавил в систему: Алдошин Сергей Михайлович