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高性能硫电池:嵌入在CeO₂中的中等热合金,用于多硫化物/硫化物双向催化

Chuanhuang Wu¹, Yong-Peng Wang², Yuchuan Zhu¹

¹College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China.

Angewandte Chemie (International ed. in English)

|October 28, 2025

概括

本研究引入了一种使用中合金和CeO2的新型中间层,以催化硫电池 (LSB) 中的反应. 这显著提高了电池性能和周期寿命,为实际应用铺平了道路.

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:

硫还原 (SRR) 和Li2S氧化 (SOR) 反应的缓慢动力学阻碍了硫电池 (LSB) 的实际应用.
开发高效的催化剂对于克服这些运动限制至关重要.

研究的目的:

为LSBs设计和合成一个功能性的中间层.
研究SRR和SOR上的中间层的催化机制.
为了评估LSB的电化学性能,利用开发的中间层.

主要方法:

一个功能性中间层的制造,其中包括化碳纳米管,NiCoMoIr中合金和CeO2.
电化学特征包括循环电量计,静电电荷放电和电化学阻抗光谱学.
通过实验数据解释对催化机制的分析.

主要成果:

间层证明了一种双向的催化机制,涉及Ni,Ir,Co,Mo和CeO2.
Ni和Ir促进了SRR,而Co和Mo则促进了Li2S转换为Li2S6.
CeO2提供了协同效应,增强了SRR和SOR动力学.
带有中间层的LSB在0.2°C时达到1535.7mAhg-1的特定容量,并在1°C时1000个周期中保持每周期0.051%的低衰变率.
一个2Ah袋式电池表现出能量密度为436.4Wh kg-1的能量密度,容量衰减率为每周期0.039%,经过800个周期.

结论:

开发的功能间层有效地催化了LSB中SRR和SOR的缓慢动力学.
多元元素合金和CeO2的协同催化作用有助于提高电池性能和寿命.
结果表明,高性能LSB的实际应用具有显著的潜力.

关键词:

双向催化剂是一种双向的催化剂.这就是CeO2 .功能性的中间层.硫电池的使用方法中等的合金.

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