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阶段工程 CoTe₂ 合金的起源向动力学强化和无树的硫电池

Bin Li¹, Peng Wang¹, Jia Yuan¹

¹School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P. R. China.

Advanced materials (Deerfield Beach, Fla.)

|December 4, 2023

概括

奥托比克CoTe2通过改善硫减少动力学和使沉积均,克服像树突成长这样的重大障碍,显著提高硫电池性能.

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
储能储能储能储能储能储能

背景情况:

硫 (Li-S) 电池面临着缓慢的电化学动力学和树生长的挑战.
了解多态效应对于设计Li-S电池中有效的催化剂至关重要.

研究的目的:

系统地评估CoTe2对硫还原反应 (SRR) 和涂/脱落的多态效应.
为了阐明不同CoTe2多态的催化机制,用于Li-S电池.

主要方法:

理论计算 (例如,d频段中心分析)
电化学测量 (例如,循环电压测量,静电循环)
完整的细胞性能测试测试完整的细胞性能测试

主要成果:

与六边形 (h-) CoTe2.2相比,正交形 (o-) CoTe2对SRR具有更高的催化活性.
o-CoTe2促进了更均的沉积,抑制了树岩的形成.
理论分析显示,o-CoTe2的d波段中心促进了与硫化物和的更强烈相互作用.

结论:

CoTe2的多态结构极大地影响了其在Li-S电池中的催化性能.
o-CoTe2为高性能Li-S电池提供了一个有前途的解决方案,证明了稳定的循环和高面积容量.
这项研究为先进的Li-S电池系统的催化剂设计提供了机械的见解.

关键词:

科巴托斯化的化物.性宿主体质的宿主体是硫电池的使用情况阶段工程工程的阶段工程.硫还原反应反应的硫还原反应

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