过电位
钝化
材料科学
阳极
化学工程
水溶液
锌
腐蚀
图层(电子)
相间
金属
电极
电镀(地质)
电化学
冶金
纳米技术
化学
物理化学
工程类
地质学
生物
遗传学
地球物理学
作者
Lingyun Xiong,Hao Fu,Shichang Han,Manxiang Wang,Jingwei Li,Woochul Yang,Guicheng Liu
标识
DOI:10.1007/s12613-022-2454-z
摘要
Although Zn metal is an ideal anode candidate for aqueous batteries owing to its high theoretical capacity, lower cost, and safety, its service life and efficiency are damaged by severe hydrogen evolution reaction, self-corrosion, and dendrite growth. Herein, a thickness-controlled ZnS passivation layer was fabricated on the Zn metal surface to obtain Zn@ZnS electrode through oxidation—orientation sulfuration by the liquid- and vapor-phase hydrothermal processes. Benefiting from the chemical inertness of the ZnS interphase, the as-prepared Zn@ZnS electrode presents an excellent anti-corrosion and undesirable hydrogen evolution reaction. Meanwhile, the thickness-optimized ZnS layer with an unbalanced charge distribution represses dendrite growth by guiding Zn plating/stripping, leading to long service life. Consequently, the Zn@ZnS presented 300 cycles in the symmetric cells with a 42 mV overpotential, 200 cycles in half cells with a 78 mV overpotential, and superb rate performance in Zn∥NH4V4O10 full cells.
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