锌
电化学
电极
材料科学
电解质
水溶液
金属
锰
无机化学
化学工程
电镀(地质)
化学
冶金
有机化学
地球物理学
物理化学
工程类
地质学
作者
Qing Li,Ao Chen,Donghong Wang,Yuwei Zhao,Xiaoqi Wang,Jinkai Xu,Bangshu Xiong,Zhi Chen
标识
DOI:10.1038/s41467-022-31461-7
摘要
Aqueous zinc metal batteries are a viable candidate for cost-effective energy storage. However, the cycle life of the cell is adversely affected by the morphological evolution of the metal electrode surface upon prolonged cycling. Here, we investigate different electrochemical protocols to favour the formation of stable zinc metal electrode surface morphologies. By coupling electrochemical and optical microscopy measurements, we demonstrate that an initial zinc deposition on the metal electrode allows homogeneous stripping and plating processes during prolonged cycling in symmetric Zn||Zn cell. Interestingly, when an initially plated zinc metal electrode is tested in combination with a manganese dioxide-based positive electrode and a two molar zinc sulfate aqueous electrolyte solution in coin cell configuration, a specific discharge capacity of about 90 mAh g-1 can be delivered after 2000 cycles at around 5.6 mA cm-2 and 25 °C.
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