摘要
Flexible zinc-air batteries(FZABs)are featured with safety and high theoretical capacity and become one of the ideal energy supply devices for flexible electronics.However,the lack of cost-effective electrocatalysts remains a major obstacle to their commercialization.Herein,we synthesized a porous dodecahedral nitrogen-doped carbon(NC)material with Co and Mn bimetallic co-embedding(CoxMni-x@NC)as a highly efficient oxygen reduction reaction(ORR)catalyst for ZABs.The incorporation of Mn effectively modulates the electronic structure of Co sites,which may lead to optimized energetics with oxygen-containing intermediates thereby significantly enhancing catalytic performance.Notably,the optimized Co4Mn1@NC catalyst exhibits superior E1/2(0.86 V)and jL(limiting current density,5.96 mA cm-2)compared to Pt/C and other recent reports.Moreover,aqueous ZAB using Co4Mn1@NC as a cathodic catalyst demonstrates a high peak power density of 163.9 mW cm-2 and maintains stable charging and discharging for over 650 h.Furthermore,FZAB based on Co4Mn1@NC can steadily operate within the temperature range of-10 to 40 ℃,demonstrating the potential for practical applications in complex climatic conditions.
基金
supported by the National Natural Science Foundation of China(22275166,51972286and 22005268)
the Zhejiang Provincial Natural Science Foundation of China(LZ21E020003and LQ20B010011)
the Fundamental Research Funds for the Provincial Universities of Zhe-jiang(RF-B2023002and RF-C-2023025)
the Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang(2020R01002)
China National University Student Innovation and Entrepreneurship Development Program(202310337065).
作者简介
Shaojie Ding,contributed equally to this work;Henan Wang,contributed equally to this work;Corresponding author:Wenxian Liu,E-mail address:liuwx@zjut.edu.cn(W.Liu).
