首页|Mn-modulated Co-N-C oxygen electrocatalysts for robust and temperature-adaptative zinc-air batteries

Mn-modulated Co-N-C oxygen electrocatalysts for robust and temperature-adaptative zinc-air batteries

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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.

Zinc-air batteriesOxygen reduction reactionElectrocatalysisNitrogen-doped carbonTemperature adaptability

Shaojie Ding、Henan Wang、Xiaojing Dai、Yuru Lv、Xinxin Niu、Ruilian Yin、Fangfang Wu、Wenhui Shi、Wenxian Liu、Xiehong Cao

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College of Materials Science and Engineering,Zhejiang University of Technology,Hangzhou,310014,PR China

College of Materials Science and Engineering,South China University of Technology,Guangzhou,510640,PR China

College of Chemical Engineering,Zhejiang University of Technology,Hangzhou,310014,PR China

Center for Membrane and Water Science & Technology,College of Chemical Engineering Zhejiang University of Technology,Hangzhou,310014,PR China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaZhejiang Provincial Natural Science Foundation of ChinaZhejiang Provincial Natural Science Foundation of ChinaFundamental Research Funds for the Provincial Universities of ZhejiangFundamental Research Funds for the Provincial Universities of ZhejiangLeading Innovative and Entrepreneur Team Introduction Program of ZhejiangChina National University Student Innovation and Entrepreneurship Development Program

222751665197228622005268LZ21E020003LQ20B010011RF-B2023002RF-C-20230252020R01002202310337065

2024

10.1016/j.cjsc.2024.100302

结构化学
中国化学会 中国科学院福建物质结构研究所

结构化学

影响因子：0.44
ISSN：0254-5861
年,卷(期)：2024.43(7)