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Electrochemical Properties of Yolk-Shell-Structured Zn-Fe-S Multicomponent Sulfide Materials with a 1:2 Zn/Fe Molar Ratio

机译:摩尔比为1:2的卵黄壳结构Zn-Fe-S多组分硫化物材料的电化学性能

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摘要

Yolk-shell-structured Zn-Fe-S multicomponent sulfide materials with a 1:2 Zn/Fe molar ratio were prepared applying a sulfidation process to ZnFe2O4 yolk-shell powders. The Zn-Fe-S powders had mixed sphalerite (Zn,Fe)S and hexagonal FeS crystal structures. The discharge capacities of the Zn-Fe-S powders sulfidated at 350 degrees C at a constant current density of 500 mA g(-1) for the first, second, and fiftieth cycles were 1098, 912, and 913 mA h g(-1), respectively. The powders exhibited a high discharge capacity of 602 mA h g(-1) even at the high current density of 10 A g(-1). The synergistic effect of yolk-shell structure and multicomponent composition improved the electrochemical properties of Zn-Fe-S powders.
机译:采用硫化工艺对ZnFe2O4蛋黄壳粉进行了制备,制备了具有1:2 Zn / Fe摩尔比的蛋黄壳结构Zn-Fe-S多组分硫化物材料。 Zn-Fe-S粉末具有混合的闪锌矿(Zn,Fe)S和六方FeS晶体结构。在350摄氏度,恒定电流密度500 mA g(-1)下进行硫化的Zn-Fe-S粉末的第一,第二和第五十个循环的放电容量分别为1098、912和913 mA hg(-1) ), 分别。即使在10 A g(-1)的高电流密度下,粉末也显示出602 mA h g(-1)的高放电容量。蛋黄-壳结构和多组分组成的协同作用改善了Zn-Fe-S粉末的电化学性能。

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