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通过缺陷工程阐明硫电池的火山型催化行为

Yan Guo¹, Jing Li¹, Gaoqian Yuan²

¹Guangdong-Hong Kong-Macau Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macau SAR 999078, People's Republic of China.

|September 5, 2023

概括

在硫化中优化缺陷度对于硫电池催化至关重要. 这项研究揭示了一种火山关系,其中最佳的硫空缺增强了多硫化物转化和电池性能.

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:

已知催化剂的缺陷会影响硫电池的反应.
缺陷度对催化效率的确切影响尚不清楚.

研究的目的:

调查硫空位度与硫化中的催化性能之间的关系.
阐明缺陷影响聚硫化物转换动力学的机制.

主要方法:

在硫化中硫空位度的综合调制.
密度函数理论 (DFT) 的计算.
在现场实验分析.

主要成果:

在缺陷度和吸附催化性能之间观察到火山形的关系.
最佳的硫缺陷增强了硫化与多硫化 (LiPSs) 的结合.
缺陷降低LiPS转换能量障碍,并促进Li2S双向催化.

结论:

控制缺陷含量对于最大限度地提高硫电池的催化剂性能至关重要.
过度或不足的缺陷导致由于结构变形和减少LiPS吸附而导致低于最佳的催化活性.
这项研究为先进的硫电池的商业化提供了见解.

关键词:

催化转化催化转化催化转化缺陷工程是什么?缺陷工程是什么?硫电池是硫电池的一种.性能调制性能调制性能调制火山的关系火山的关系

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