Engineering Cost-Efficient CoS-Based Electrocatalysts for Rechargeable Zn-Air Battery Application

作者：Yongwang Quan, Ke Zeng, Jianqiang Meng, Dingqing Jiang, Juan Li, Xiaoyi Sun, Hongtao Liu · 发表于：Industrial & Engineering Chemistry Research · 年份：2023 · DOI：10.1021/acs.iecr.3c00300 · 被引用次数：6 · 研究领域：Electrocatalysts for Energy Conversion、Advanced battery technologies research、Fuel Cells and Related Materials

The development of low-cost and efficient electrocatalysts toward the oxygen evolution reaction (OER) is crucial for clean energy devices such as metal-air batteries and fuel cells. Herein, a novel CoS@FeOOH electrocatalyst is synthesized by in-situ deposition of FeOOH nanoparticles on metallic organic frame (MOF) derived CoS hollow polyhedrons. Due to the coupling synergetic effect of FeOOH and CoS, CoS@FeOOH presents an excellent OER catalytic performance with both high electrocatalytic activity and durable cycling stability, far superior to the pristine CoS and commercial RuO 2 electrocatalysts. The assembled rechargeable zinc-air battery (ZAB) using CoS@FeOOH as the OER electrocatalyst shows a maximum power density of 89.1 mW cm –2 and continuously runs 60 h without evident polarization increment, which is far better than the ZAB using the commercial RuO 2 OER electrocatalyst. The robust catalytic performance of the CoS@FeOOH electrocatalyst is mainly attributed to the regulated electronic configurations accelerating charge transfer, abundant oxygen vacancies promoting catalytic activity, and an FeOOH protection layer inhibiting active Co dissolution.