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作为硫电池的硫载体的内置骨架Cu/NC-NFs

Die Su¹, Yuhong Zeng¹, Meiqi Geng¹

¹State Key Laboratory of Advanced Chemical Power Sources, School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400044, China. wangtaotao@cqu.edu.cn.

Chemical communications (Cambridge, England)

|March 26, 2025

概括

这项研究引入了一种新型的化碳纳米纤维 (Cu/NC-NF) 材料,可以防止聚合,提高硫 (Li-S) 电池的性能. 该材料在先进的储能应用中表现出极好的容量和稳定性.

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:

碳纳米纤维是-硫 (Li-S) 电池的有希望的硫宿主.
传统的碳纳米纤维在合成过程中聚合,阻碍了催化活性和多硫化物的转化.
这限制了Li-S电池的电化学性能和周期寿命.

研究的目的:

设计和合成一种新的Cu/NC-NF材料,以克服纳米纤维聚合.
为了研究该材料作为Li-S电池中的硫载体的有效性.
评估开发材料的电化学性能和循环稳定性.

主要方法:

使用HKUST-1作为内置的骨架前体合成Cu/NC-NF材料.
材料结构和性能的表征.
使用Cu/NC-NF作为硫阴极的Li-S电池的电化学测试.

主要成果:

来自HKUST-1的骨架成功地阻止了纳米纤维粘附,创造了一个统一的结构.
均分布的催化位点促进了多硫化快速氧化还原动力学.
Cu/NC-NF阴极在0.5°C时实现了884.9 mA hg-1的高排放特异容量.
观察到异常的循环稳定性,低容量衰减率为每循环0.06%.

结论:

这种Cu/NC-NF材料有效地作为Li-S电池的强大的硫载体.
独特的结构增强了催化活性和电化学性能.
这种方法为开发高性能Li-S电池提供了一个有前途的战略.

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