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膜启发的碳阴极与相互连接的孔状结构和不对称的协调站点为高级Li-S电池

Rui Yan¹, Zhenyang Zhao¹, Ran Zhu¹

¹College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China.

Angewandte Chemie (International ed. in English)

|April 15, 2024

概括

这项研究引入了具有独特V-S1N3位点的生物灵感碳阴极,以提高硫电池性能. 这种新型催化剂加速了硫的转化,大大减少了穿效应,提高了稳定性.

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
催化剂是一种催化剂.

背景情况:

-硫 (Li-S) 电池中的穿效应阻碍了性能.
协调金属单原子 (M-N4) 催化剂看起来有希望,但需要优化.
有效的硫转化催化是克服Li-S电池局限性的关键.

研究的目的:

开发一种具有相互连接的多孔结构的生物灵感碳阴极.
引入非对称协调的-硫- (V-S1N3) 站点,以增强催化活性.
为了提高Li-S电池的效率和稳定性.

主要方法:

生物灵感碳阴极的可控合成.
纳入不对称的协调V-S1N3活点.
催化机制和聚硫化物吸附的实验和理论分析 (例如,DFT).

主要成果:

合成的阴极表现出一个相互连接的多孔结构.
酶模拟V-S1N3位点显示电子分布不对称和高可调性.
通过低热力学能量障碍实现了优化的聚硫化物吸附,从而实现了特殊的循环稳定性 (在600个循环中衰变0.076%).

结论:

具有V-S1N3位点的生物灵感阴极有效地加速了硫的转化,并减轻了穿效应.
V-S1N3位点的不对称协调和电子特性增强了催化活性和Li-S电池的性能.
这种方法为开发高性能和稳定的Li-S电池提供了一个有希望的战略.

关键词:

-S电池电池的使用情况.V−S1N3 的中心是V−S1N3.不对称的协调协调.生物启发材料是生物启发材料.催化性多孔碳催化性多孔碳

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