Amorphous Heterostructure Derived from Divalent Manganese Borate for Ultrastable and Ultrafast Aqueous Zinc Ion Storage

• DOI: 10.1002/advs.202205794
• Publication Date: 2023-01-21T03:25:32Z
• Authors: Xixian Li; Chenchen Ji; Jinke Shen; Jianze Feng; Hongyu Mi; Yongtai Xu; Fengjiao Guo; Xingbin Yan
• Keywords: Divalent

Abstract Aqueous zinc‐manganese (Zn–Mn) batteries have promising potential in large‐scale energy storage applications since they are highly safe, environment‐friendly, and low‐cost. However, the practicality of Mn‐based materials is plagued by their structural collapse uncertain mechanism upon cycling. Herein, this work designs an amorphous manganese borate (a‐MnBO x ) material via disordered coordination to alleviate above issues improve electrochemical performance Zn–Mn batteries. The unique physicochemical characteristic a‐MnBO enables inner serve as a robust framework initial process. Additionally, dioxide, Zn MnO(OH) 2 , 4 SO (OH) 6 ·4H O active components form on surface during charge/discharge detailed situ/ex situ characterization demonstrates that heterostructure multicomponent phases endows two modes (Zn 2+ /H + intercalation/deintercalation process reversible conversion between O) phases). Therefore, obtained Zn//a‐MnBO battery exhibits high specific capacity 360.4 mAh g −1 density 484.2 Wh kg impressive cycling stability (97.0% retention after 10 000 cycles). This finding with dual‐energy provides new opportunities for developing high‐performance aqueous