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

Shaojie Ding ¹Henan Wang ¹Xiaojing Dai ¹Yuru Lv ²Xinxin Niu ¹Ruilian Yin ³Fangfang Wu ¹Wenhui Shi ⁴Wenxian Liu ¹Xiehong Cao¹

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作者信息

1. College of Materials Science and Engineering,Zhejiang University of Technology,Hangzhou,310014,PR China
2. College of Materials Science and Engineering,South China University of Technology,Guangzhou,510640,PR China
3. College of Chemical Engineering,Zhejiang University of Technology,Hangzhou,310014,PR China
4. Center for Membrane and Water Science & Technology,College of Chemical Engineering Zhejiang University of Technology,Hangzhou,310014,PR China
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Abstract

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.

Key words

Zinc-air batteries/Oxygen reduction reaction/Electrocatalysis/Nitrogen-doped carbon/Temperature adaptability

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基金项目

National Natural Science Foundation of China(22275166)

National Natural Science Foundation of China(51972286)

National Natural Science Foundation of China(22005268)

Zhejiang Provincial Natural Science Foundation of China(LZ21E020003)

Zhejiang Provincial Natural Science Foundation of China(LQ20B010011)

Fundamental Research Funds for the Provincial Universities of Zhejiang(RF-B2023002)

Fundamental Research Funds for the Provincial Universities of Zhejiang(RF-C-2023025)

Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang(2020R01002)

China National University Student Innovation and Entrepreneurship Development Program(202310337065)

出版年

2024

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

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