电池(电)
阴极
锰
电解质
有机自由基电池
歧化
无机化学
羧酸盐
化学
阳极
电化学
水溶液
溶解
材料科学
电极
催化作用
冶金
有机化学
物理化学
功率(物理)
物理
量子力学
作者
Feifan Zhang,Gege Wang,Jing Wu,Xiaowei Chi,Yu Liu
标识
DOI:10.1002/anie.202309430
摘要
Abstract Aqueous Zn−Mn battery has been considered as the most promising scalable energy‐storage system due to its intrinsic safety and especially ultralow cost. However, the traditional Zn−Mn battery mainly using manganese oxides as cathode shows low voltage and suffers from dissolution/disproportionation of the cathode during cycling. Herein, for the first time, a high‐voltage and long‐cycle Zn−Mn battery based on a highly reversible organic coordination manganese complex cathode (Manganese polyacrylate, PAL−Mn) was constructed. Benefiting from the insoluble carboxylate ligand of PAL−Mn that can suppress shuttle effect and disproportionationation reaction of Mn 3+ in a mild electrolyte, Mn 3+ /Mn 2+ reaction in coordination state is realized, which not only offers a high discharge voltage of 1.67 V but also exhibits excellent cyclability (100 % capacity retention, after 4000 cycles). High voltage reaction endows the Zn−Mn battery high specific energy (600 Wh kg −1 at 0.2 A g −1 ), indicating a bright application prospect. The strategy of introducing carboxylate ligands in Zn−Mn battery to harness high‐voltage reaction of Mn 3+ /Mn 2+ well broadens the research of high‐voltage Zn−Mn batteries under mild electrolyte conditions.
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