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在高性能Zn-空气电池的空心化碳上设计原子分散的Mn和Fe站点

Qiyu Li¹, Lei Zhao², Zhaozhao Zhu²

¹College of Chemistry and Chemical Engineering, China West Normal University, Nanchong 637000, China; School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China.

Journal of colloid and interface science

|December 4, 2024

概括

这项研究引入了一种新的空心化碳催化剂,用于空气电池 (ZAB) 的铁和位. 催化剂显著提高了氧降解反应活性和ZAB性能,为储能提供了一个有前途的解决方案.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
纳米技术纳米技术

背景情况:

空气电池 (ZABs) 提供高能量密度的环保,经济高效的能源存储.
实际ZAB应用受到高超电位和缓慢反应动力学的限制.
先进的催化剂对于克服ZAB性能瓶至关重要.

研究的目的:

开发一种高效的催化剂,用于ZAB中的氧降解反应 (ORR).
为了研究原子分散的Fe和Mn位点在空洞的添加碳支器上的催化性能.
提高ZAB的功率密度和特定容量.

主要方法:

一种简单的NaCl辅助热解策略被用来合成催化剂.
催化剂结构的特征是,专注于空洞的多孔形态和原子分散的Fe和Mn位点.
评估了催化剂的ORR活性,耐用性和甲醇耐受性.
催化剂被集成到ZAB中,以评估设备性能.

主要成果:

合成的空心化碳支持的Fe和Mn位点 (FeMn-HNC) 显示出出色的ORR催化活性.
FeMn-HNC催化剂表现出了显著的耐用稳定性和良好的甲醇耐受性.
使用FeMn-HNC催化剂的ZAB实现了223.1mWcm-2的最大功率密度.
在ZABs中记录了804.3 mAh的高特异性容量.

结论:

FeMn-HNC催化剂为提高ZAB性能提供了一个高度有效的解决方案.
空洞的多孔结构和原子分散的金属位点是增强催化活性的关键.
这项工作为推进高性能ZAB中化碳催化剂的可行战略提供了可行策略.

关键词:

含有的空心碳.氧降解反应是氧降解反应.在Zn-空气电池.

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