电解质
碘化物
阳极
水溶液
阴极
电池(电)
化学
无机化学
离子
电化学
铋
锌
化学工程
材料科学
电极
有机化学
物理化学
功率(物理)
物理
量子力学
工程类
作者
Xinyu Luo,Tianzhu Xie,Tiantian Fang,Huibin Liu,Shuya Zhang,Mingjun Cen,Wenchao Peng,Yang Li,Xiaobin Fan
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2023-07-31
卷期号:8 (8): 3569-3577
被引量:2
标识
DOI:10.1021/acsenergylett.3c01407
摘要
Neutral aqueous electrolytes are more compatible with the anode of zinc metal batteries than alkaline electrolytes. Previous reports have shown that Zn||Bi2O3 batteries with mild electrolytes have not been able to function effectively, though Bi2O3 stands out as a promising cathode material with a low cost and potentially high capacity. Herein, iodide ions are introduced as a multifunctional electrolyte additive, allowing for a reversible multielectron conversion reaction of Bi(0) ↔ Bi(III) in mild aqueous electrolyte. Iodide ions significantly alter the intermediate reaction steps, leading to a kinetically favorable mechanism through coordination with Bi3+ to continuously refresh and activate the interface. The resulting secondary neutral Zn||Bi2O3 battery delivers a high specific capacity (1960 mAh cm–3), exceptional rate performance, and remarkable cycling stability (1225 mAh cm–3 at 10 A g–1, retaining 85% after 1500 cycles) with the conversion efficiency close to 100% per cycle. This work provides an energetic perspective for reversible battery chemistry.
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