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通过优化阴极材料和可溶性FePc还氧介质的相互作用来提高氧电池的性能

Baoxing Wang^1,2, Jingyi Tian¹, Lei Gao¹

¹Key Laboratory of Mesoscopic Chemistry of MOE, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Center of Energy Storage Materials & Technology, College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210023, China.

Small (Weinheim an der Bergstrasse, Germany)

|December 29, 2025

概括

新的阴极材料通过提高铁等氧化还原介质的可溶性来提高氧电池的性能,例如二 (FePc). 优化的TiN-FePc催化剂表现出增强的循环稳定性和效率.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
储能储能储能储能储能储能

背景情况:

宏环氧还原介质 (RMs) 通过促进电子和氧气运输来增强氧 (Li─O) 电池的性能.
由于与碳阴极的强烈相互作用,RMs在电解质中的溶解度较低,例如铁 (II) 酸 (FePc),限制了它们的实际应用.

研究的目的:

研究非sp2碳材料 (MoN,TiN,Ti3C2Tx) 作为阴极,以提高FePc溶解度和LiO电池性能.
建立阴极-FePc相互作用,FePc溶解度和电池性能之间的相关性.

主要方法:

在电池中使用非sp2碳材料 (MoN,TiN,Ti3C2Tx) 作为阴极.
在不同的阴极材料上研究了FePc的溶解度和吸附强度.
利用控制实验和密度函数理论 (DFT) 计算来分析催化机制.

主要成果:

在阴极-FePc吸附强度和电池性能之间观察到火山形的相关性,吸附减少导致FePc溶解度增加.
优化的TiN-FePc阴极催化剂实现了最高的循环稳定性,持续392个循环.
TiN-FePc催化剂保持了高FePc度,促进了电子转移,并改善了氧气的运输.

结论:

非sp2碳阴极有效调节RM阴极相互作用,提高RM溶解度和Li-O电池性能.
优化氧化还原介质和阴极之间的相互作用是设计高性能电池的可行策略.
该TiN-FePc催化剂显示了推动Li─O2电池技术的巨大潜力.

关键词:

吸附/脱附相互作用阴极-FePc催化剂,电子交换,-O2 电池火山的关系关系.

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