Correlative Mn-Co catalyst excels Pt in oxygen reduction reaction of quasi-solid-state zinc-air batteries  

作　　者：Tingting Wang Jincheng Huang Wei Sang Cai Zhou Bohan Zhang Wei Zhu Kang Du Zongkui Kou Shengxiang Wang 

机构地区：[1]School of Mathematical and Physical Sciences,Wuhan Textile University,Wuhan 430200,China [2]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China

出　　处：《Nano Research》2024年第5期4118-4124,共7页纳米研究（英文版）

基　　金：support of the Fundamental Research Funds for the Central Universities(No.40120631);National Natural Science Foundation of China(No.52202291)for the support.

摘　　要：Zn-air batteries(ZABs)as a class of promising energy storage setups are generally powered by efficient and robust catalysts at the oxygen-involving cathode.Although the existing non-noble catalysts have outperformed noble Pt benchmark in the alkaline liquid-state ZABs,to the best of our knowledge few have excelled Pt in quasi-solid-state(QSS)ZABs.Herein,we found that an integrated Mn-Co cathode derived from the bimetallic Mn/Co metal organic frameworks generates a 1.4-fold greater power density in the QSS ZABs than a Pt cathode while its power density in liquid-state ZABs is only 0.8-fold of the latter.Moreover,such Mn-Co catalyst delivers high-rate oxygen reduction reaction(ORR)capability with half-wave potential of 0.84 V.The in-depth characterizations and analyses have demonstrated that the Co and Mn species show the specific affinity towards H_(2)O and O_(2),respectively,synergizing the ORR process in the water-deficient environment of QSS ZABs.This work has enlightened the rational design of non-noble metal catalysts to improve the power density of QSS ZABs.

关 键 词：non-noble metal catalysts zinc-air battery quasi-solid-state synergistic effect 

分 类 号：O64[理学—物理化学]