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来自棕线的Ni/Zn/N-Doped多孔碳微管用于高性能Li-S电池

Jingjing He¹, Xi Chen¹, Yang Wu¹

¹School of Materials Science and Engineering, Sichuan University, Chengdu 610065, P. R. China.

ACS applied materials & interfaces

|April 24, 2025

概括

棕衍生胺多孔碳微管具有Ni/Zn位点,有效抑制聚硫化物在硫电池中的穿,提高性能和稳定性.

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
储能储能储能储能储能储能

背景情况:

硫 (Li-S) 电池具有高的理论能量密度,但受到聚硫化物穿效应的影响.
开发高效的阴极主机和分离器修饰器对于先进的Li-S电池性能至关重要.

研究的目的:

用于从棕线中构建嵌入Ni/Zn催化位点 (NiZn-NPCT) 的化多孔碳微管.
评估NiZn-NPCT作为Li-S电池的阴极主机和分离器修饰器.

主要方法:

从可再生棕线合成NiZn-NPCT.
描述NiZn-NPCT微观结构和催化性能.
使用NiZn-NPCT修改分离器组装和电化学测试Li-S电池.

主要成果:

NiZn-NPCT表现出相互连接的多孔道和活性点,增强了多硫化物 (LiPSs) 的亲和力.
NiZn-NPCT加速了硫种的氧化还原转化,减轻了穿效应.
带有NiZn-NPCT修改分离器的Li-S电池实现了高初始容量 (1220 mAh g-1在0.1C) 和稳定的循环 (418.1 mAh g-1在500个循环后在1C).

结论:

来自生物质的NiZn-NPCT是先进Li-S电池的有效材料.
独特的微观结构和NiZn-NPCT的催化部位显著提高了电池性能和循环稳定性.
这项工作为高性能储能设备提出了一个可持续的战略.

关键词:

生物质的生物质是生物质.硫电池是硫电池的一种.有孔的碳微管微管.分离器的修改分离器的修改过渡金属的过渡金属是什么

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