Mo2C/Co@NC对 LiS 电池中的多硫化物调节进行异构接口工程
Ting Zhao1, Kaiquan He1, Xingyi Hu1
1Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, Department of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, China.
Journal of colloid and interface science
|October 16, 2025
概括
一个使用异质Mo2C/Co被N-doped多孔碳所限制的新型中间层有效地抑制了硫 (LiS) 电池中的多硫化物穿. 这提高了实际应用的电化学性能和循环寿命.
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 (LiS) 电池面临的挑战是聚硫化物穿效应和缓慢的氧化还原动力学.
- 这些问题限制了它们的实际应用和周期寿命.
研究的目的:
- 设计一个多功能中间层,以解决聚硫化物穿问题,并增强LiS电池中的氧化还原动力学.
- 为了提高LiS电池的电化学性能和稳定性.
主要方法:
- 通过受控热解合成了一种异质的Mo2C/Co,由N-doped多孔碳 (Mo2C/Co@NC) 隔层限制.
- 使用异质的Mo2C/Co作为活性中心和用于电子/离子传输的多孔NC矩阵.
- 作为LiS电池配置中的中间层进行了电化学评估.
主要成果:
- 在3C达到874.0mAhg-1的高初始放电容量.
- 经过1000个循环 (0.057%/循环色) 后,表现出优异的循环稳定性,容量保留373.3 mAh g-1 .
- 显著优于没有新型中间层的LiS电池 (0.082%/周期色).
结论:
- Mo2C/Co@NC中间层有效地固定了多硫化物,并加速了它们的氧化还原转化.
- 层次的多孔NC矩阵确保了快速的电子/离子运输,提高了电池的性能.
- 异面接口工程为开发实用的LiS电池提供了一个有希望的策略.
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