材料科学
枝晶(数学)
阳极
水溶液
电偶阳极
腐蚀
化学工程
金属
电解质
电镀
钝化
图层(电子)
电镀(地质)
电极
锌
剥离(纤维)
电化学
冶金
纳米技术
阴极保护
复合材料
化学
有机化学
工程类
物理化学
几何学
地质学
数学
地球物理学
作者
Junnan Hao,Bo Li,Xiaolong Li,Xiaohui Zeng,Shilin Zhang,Fuhua Yang,Sailin Liu,Dan Li,Chao Wu,Zaiping Guo
标识
DOI:10.1002/adma.202003021
摘要
Although Zn metal has been regarded as the most promising anode for aqueous batteries, it persistently suffers from serious side reactions and dendrite growth in mild electrolyte. Spontaneous Zn corrosion and hydrogen evolution damage the shelf life and calendar life of Zn-based batteries, severely affecting their industrial applications. Herein, a robust and homogeneous ZnS interphase is built in situ on the Zn surface by a vapor-solid strategy to enhance Zn reversibility. The thickness of the ZnS film is controlled via the treatment temperature, and the performance of the protected Zn electrode is optimized. The dense ZnS artificial layer obtained at 350 °C not only suppresses Zn corrosion by forming a physical barrier on the Zn surface, but also inhibits dendrite growth via guiding the Zn plating/stripping underneath the artificial layer. Accordingly, a side reaction-free and dendrite-free Zn electrode is developed, the effectiveness of which is also convincing in a MnO2 /ZnS@Zn full-cell with 87.6% capacity retention after 2500 cycles.
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