摘要
The exploration of active and long-lived oxygen reduction reaction(ORR)catalysts for the commercialization of zinc-air batteries are of immense significance but challenging.Herein,the sulfur doped FeWO_(4)embedded in the multi-dimensional nitrogen-doped carbon structure(S-FeWO_(4)/NC)was successfully synthesized.The doped S atoms optimized the charge distribution in FeWO_(4)and enhanced the intrinsic activity.At the same time,S doping accelerated the formation of reaction intermediates during the adsorption reduction of O_(2)on the surface of S-FeWO_(4)/NC.Accordingly,the S-FeWO_(4)/NC catalyst showed more positive half-wave potential(0.85 V)and better stability than that of the FeWO_(4)/NC catalyst.Furthermore,the S-FeWO_(4)/NC-based zinc-air battery exhibited considerable power density of 150.3m W cm^(-2),high specific capacity of 912.7 m A h g^(-1),and prominent cycle stability up to 220 h.This work provides an assistance to the development of cheap and efficient tungsten-based oxygen reduction catalysts and the promotion of its application in the zinc-air battery.
基金
the support of the National Natural Science Foundation of China(Nos.22178148,U21A20328)
the Natural Science Foundation of Jiangsu Province(No.BK20191430)
the Six Talent Peaks Project in Jiangsu Province(No.XNY-009)
the Jiangsu Province and Education Ministry CoSponsored Synergistic Innovation Center of Modern Agricultural Equipment(No.XTCX2029)
a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions。
作者简介
Corresponding authors:Li Xu,E-mail addresses:xulichem@ujs.edu.cn;Corresponding authors:Henan Li,E-mail addresses:lhn@ujs.edu.cn;Corresponding authors:Dong Su,E-mail addresses:dongsu@iphy.ac.cn。
