双 Fe/I 单原子电催化剂,用于高性能氧降低和宽温度准固态 Zn-Air 电池
Meng Du1,2, Bingxian Chu1, Qichen Wang1
1Shenzhen Key Laboratory of Micro/Nano-Porous Functional Materials (SKLPM), SUSTech-Kyoto University Advanced Energy Materials Joint Innovation Laboratory (SKAEM-JIL), Department of Chemistry and Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), Shenzhen, 518055, China.
Advanced materials (Deerfield Beach, Fla.)
|October 10, 2024
概括
研究人员开发了一种新的双Fe/I单原子催化剂 (SAC),用于准固态空气电池 (ZAB). 这种先进的催化剂增强了氧降解反应 (ORR) 活性和电池稳定性,为下一代能源存储铺平了道路.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 氧降解反应 (ORR) 电催化剂对于准固态空气电池 (ZAB) 是至关重要的.
- 现有的Fe-N-C单原子催化剂 (SAC) 由于强烈的氧化中间吸附,其活性和稳定性受到限制.
研究的目的:
- 合成和评估一种新的双Fe/I单原子催化剂 (Fe/I-N-CR),以提高ZAB中的ORR性能.
- 研究双 Fe/I 单原子兴奋剂对催化剂电子结构和稳定性的协同效应.
主要方法:
- 一种金属有机框架 (MOF) 介导的两步并联热解法用于催化剂合成.
- 原子级 (I) 兴奋剂被用来调节Fe-Nx中心的电子结构.
- Fe/I-N-CR催化剂在准固态ZAB中作为阴极进行了测试.
主要成果:
- 与Pt/C和单个Fe或I SAC相比,Fe/I-N-CR催化剂表现出更高的ORR活性和稳定性.
- 使用Fe/I-N-CR的ZAB实现了197.9mW cm-2的高功率密度和长期循环稳定性 (280h在20mA cm-2).
- 催化剂在广泛的温度范围 (-40至60°C) 中表现出色.
结论:
- 通过MOF的策略,可以创建具有协同金属/非金属中心的高性能双SAC.
- Fe/I-N-CR催化剂为推进可持续的准固态ZAB技术提供了一个有希望的解决方案.
- 原子兴奋剂提供了一条有效的途径,用于改进能量储存应用的工程催化剂特性.
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