对于高效的硫电池而言,在减少的石墨烯氧化物上使用双功能酸铁单原子催化剂:同时捕获/催化聚硫化物和沉积法规
Abdul Hameed Pato1, Longtao Ren1, Imran Ali Chandio1
1College of Chemistry, State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
Small (Weinheim an der Bergstrasse, Germany)
|June 19, 2025
概括
这项研究引入了一种新型的配合铁单原子催化剂 (Fe-NPC@rGO),以克服硫 (Li-S) 电池的挑战. 催化剂有效地抑制了聚硫化物穿效应和树的生长,提高了电池的性能和寿命.
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
- 催化剂是一种催化剂.
背景情况:
- 硫 (Li-S) 电池由于聚硫化物 (LiPSs) 穿效应和树增长而面临限制.
- 开发先进的催化剂对于高性能和稳定的Li-S电池至关重要.
研究的目的:
- 开发一种双功能的催化剂,同时解决LiPSs穿和Li-S电池中的树石问题.
- 在减少的氧化石墨烯 (Fe-NPC@rGO) 上研究合的铁单原子催化剂的催化活性和结构性质.
主要方法:
- 密度函数理论 (DFT) 计算以了解催化机制.
- Fe-NPC@rGO.的实验合成和表征.
- 使用Fe-NPC@rGO修改分离器和全电池配置的Li-S电池的电化学测试.
主要成果:
- Fe-NPC@rGO证明了增强的硫氧化还原动力学和有效的LiPS捕获/转换,减轻了穿效应.
- 催化剂的性质促进了的均沉积,抑制了树岩的形成.
- -S电池表现出高放电容量 (1156 mAh g-1 在1 C) 与低容量衰变 (0.032% 每个周期超过1000个周期).
- 在实际条件下 (低E/S和N/P比率),全Li-S电池实现了高面积容量 (4.9 mAh cm−2).
结论:
- Fe-NPC@rGO作为一个有效的双功能催化剂,用于先进的Li-S电池.
- 催化剂的独特结构和特性显著提高了电化学性能和循环稳定性.
- 这项工作为为高能量密度电池设计下一代电催化剂提供了宝贵的见解.
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