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抗矿尖型树突结构,使Li-S电池中的聚硫化物能够独立的催化沉积模式

Meng Lei^1,2,3, Wenlong Liu^1,2,3, Chuanzhong Lai^1,2,3

¹State Key Laboratory of High Performance Ceramics, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 585 He Shuo Road, Shanghai 201899, China.

|January 12, 2026

概括

一种新型的复合催化剂 (CINN) 通过加速聚硫化物 (LiPS) 转换和减少穿效应来提高硫 (Li-S) 电池性能. 这导致Li-S电池的容量和耐用性更高.

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 (Li-S) 电池具有较高的理论容量,但受到聚硫化物 (LiPS) 中间体的缓慢动力学和穿效应的影响.
开发高效的催化剂和微结构对于提高Li-S电池的性能和耐用性至关重要.

研究的目的:

为了合成和描述一种新的复合催化剂,Cu_0.145In_0.855Ni₃N/Cu_0.61Ni_0.39@C (CINN),用于Li-S电池.
调查催化机制和微观结构设计,以增强LiPS转化和减少穿效应.

主要方法:

合成CINN催化剂使用g-C₃N₄蒸汽调制方法从分层的双氧化物.
用于LiPS转换的催化剂微观结构和催化活性的表征.
对CINN修改的Li-S电池进行电化学测试,包括容量,速率性能和循环稳定性.

主要成果:

CINN催化剂具有独特的树微结构,具有独立的催化沉积点,优化空间利用和耐用性.
催化剂有效地催化了LiPS转换的速度决定性步骤,将核聚变极化从34到9mV减少,激活能量为48.8kJmol-1.
经过CINN修改的Li-S电池实现了高放电容量~1300 mAh g^-1,优异的速率能力 (500 mAh g^{-1在8°C),以及显著的耐用性 (641 mAh g^{-1在400个循环后).}}

结论:

具有不同的功能域的CINN催化剂的合理设计显著提高LiPS转换动力学,并抑制穿效应.
开发的催化剂为实现高性能和持久的Li-S电池提供了一个有希望的战略.
该研究表明,量身定制的微结构和催化站点在推进下一代电池技术方面的潜力.

关键词:

-S电池的使用情况.这是一种反矿石 (antiperovskite).催化 - 沉积模式树突结构是一种树突结构.聚硫化物相互作用

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