Co9S8@NiFe-LDH Bifunctional Electrocatalysts as High-Efficiency Cathodes for Zn-Air Batteries

文献类型： 外文期刊

第一作者： Zhou, Yang

作者： Zhou, Yang;Si, Jiaqi;Wang, Hongmei;Li, Xiaofeng;Deng, Chao;Zhang, Sen;Wang, Hongmei

作者机构：

期刊名称：ENERGY & FUELS （ 影响因子：5.3； 五年影响因子：4.6 ）

ISSN： 0887-0624

年卷期： 2023 年 37 卷 13 期

页码：

收录情况： SCI

摘要： Exploring new cathodes with high-energy storage is akey issuefor zinc-air batteries. Herein, a multidimensional free-standingcathode catalyst consisting of Co9S8 nanorodsloaded with NiFe-LDH nanosheets (Co9S8@NiFe-LDH)was constructed. Co9S8@NiFe-LDH not only providesa conductive backbone for fast electron/ion transfer but also hasabundant active sites to accelerate the oxygen reduction/evolutionreaction (ORR/OER). Co9S8 nanorods with highORR activity and good electrical conductivity were grown in situ oncarbon cloth, and NiFe LDH nanorods were successfully loaded on thesurface of Co(9)S(8)nanorods. Benefiting from sucha delicate structural design, the OER potential of Co9S8@NiFe-LDH is 1.62 V at 10 mA cm(-2), whichis slightly higher than the OER potential of 1.61 V for the commercialnoble metal RuO2, indicating its excellent OER activityclose to that of noble metal catalysts. The prepared zinc-aircell based on the Co9S8@NiFe-LDH cathode hasan ideal specific capacity of 780.5 mAh g(-1) at 10mA cm(-2), a high power density of 148 mW cm(-2) at 180 mA cm(-2), and a good 200 h cycle stability.Therefore, this work paves the way for catalyst design and promotesthe development of multidimensional composite-structured cathode materialsfor zinc-air batteries.

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