Citation: Shaojie Ding, Henan Wang, Xiaojing Dai, Yuru Lv, Xinxin Niu, Ruilian Yin, Fangfang Wu, Wenhui Shi, Wenxian Liu, Xiehong Cao. Mn-modulated Co–N–C oxygen electrocatalysts for robust and temperature-adaptative zinc-air batteries[J]. Chinese Journal of Structural Chemistry, ;2024, 43(7): 100302. doi: 10.1016/j.cjsc.2024.100302 shu

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

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 material with Co and Mn bimetallic co-embedding (CoxMn1−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 (5.96 mA cm−2) compared to Pt/C and other recent reports. Moreover, aqueous ZAB using the 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 the Co4Mn1@NC can steadily operate within the temperature range of -10 °C to 40 °C, demonstrating the potential for practical applications in complex climatic conditions.
- Zinc-air batteries,
- Oxygen reduction reaction,
- Electrocatalysis,
- Nitrogen-doped carbon,
- Temperature adaptability
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