作为高性能Li-S电池的高效聚硫化物屏障的C-修饰分离器
Zi-Jing Shi1, Ya-Wen Tian1, Xin-Ling Wang1
1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China.
ACS applied materials & interfaces
|April 14, 2025
概括
使用MoS2@C改性聚烯的硫电池 (LSB) 的新型分离器通过减少聚硫化物穿来提高性能. 这种修改改善了先进电池应用的能量密度和循环寿命.
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:
- 硫电池 (LSB) 显示出高能量密度,但受到聚硫化物穿和慢动力学的影响.
- 由于周期稳定性和速率能力不佳,LSBs的商业应用受到阻碍.
研究的目的:
- 设计和制造一个MoS2@C层间修改的聚烯分离器 (MoS2@C-PP),以提高LSB的性能.
- 调查MoS2和N-doped碳在减轻穿效应和加速氧化还原动力学中的作用.
主要方法:
- 使用MoS2@C复合材料修改商用聚烯分离器.
- 使用修改后的分离器对LSB进行电化学表征,包括循环稳定性和速率性能测试.
主要成果:
- MoS2@C-PP分离器通过增强的聚硫化物吸收和C-S键形成,有效地抑制了穿效应.
- 由于N-化碳,观察到改善的离子转移和电解质透.
- 使用MoS2@C-PP的LSB在200个循环后在0.5°C下实现了860.5mAhg-1的放电容量,在2°C下达到711.5mAhg-1.
结论:
- 使用MoS2@C对分离器进行修改是提高LSB电化学性能的一种可行的策略.
- 开发的MoS2@C-PP分离器为稳定和高性能LSB提供了一个有前途的解决方案.
- 这种方法加速了氧化还原动力学,并减少了LSB的容量衰减.
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