浙江工业大学刘文贤团队报道了锰调制Co-N-C氧电催化剂的稳健性和温度自适应锌空气电池。相关研究成果发表在2024年4月11日出版的《结构化学》。

柔性锌空气电池（FZABs）具有安全性和高理论容量的特点，是柔性电子产品理想的能量供应装置之一。然而，缺乏具有成本效益的电催化剂仍然是其商业化的主要障碍。

该文中，研究人员合成了一种具有Co和Mn双金属共包埋的多孔十二面体氮掺杂碳材料(Co_xMn_1-x@NC)，作为ZABs的高效氧还原反应（ORR）催化剂。Mn的掺入有效地调节了Co位点的电子结构，这可能导致含氧中间体的能量学优化，从而显著提高催化性能。值得注意的是，经过优化的Co₄Mn₁@NC与Pt/C和其他最近的报道相比，催化剂表现出优异的E_1/2（0.86V）和j_L（5.96mA/cm²）。

此外，使用Co₄Mn₁@NC作为阴极催化剂，FZABs表现出163.9 mW cm^-2的高峰值功率密度，并在650小时以上保持稳定的充电和放电。此外，基于Co₄Mn₁@NC可以在-10°C至40°C的温度范围内稳定运行，证明了在复杂气候条件下实际应用的潜力。

附：英文原文

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

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

Issue&Volume: 2024-04-11

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 material with Co and Mn bimetallic co-embedding (CoxMn1x@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 cm2) 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 cm2 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.

DOI: 10.1016/j.cjsc.2024.100302

Source: http://cjsc.ac.cn/cms/issues/599