回收两种废物,用于制造二重装饰的化/三氧化碳纤维中间层和多孔碳,以改进硫电池
1National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, Yunnan Minzu University, Kunming 650500, China.; Key Laboratory of Green-chemistry Materials in University of Yunnan Province, Yunnan Minzu University, Kunming 650500, China.
Journal of colloid and interface science
|January 23, 2026
概括
回收废物材料创造了一个功能性的中间层,抑制了聚硫化物的穿,并增强了硫电池中的反应动力学. 这种创新方法显著提高了电池性能和循环寿命.
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:
- 多硫化物 (LiPSs) 的穿效应和缓慢的反应动力学阻碍了硫 (LiS) 电池的性能.
- 开发功能性中间层和硫宿主材料对于抑制LiPS和增强电化学反应至关重要.
研究的目的:
- 从回收废物材料中创建一个功能性的中间层,以提高LiS电池的性能.
- 研究化 (VN) 和三氧化 (V2O3) 在抑制穿效应和增强反应动力学方面的协同效应.
主要方法:
- 回收棉花面膜和咖啡,通过液相浸和热解来制备极性VN/V2O3联合装饰的碳纤维中间层和生物多孔碳.
- 使用密度函数理论 (DFT) 计算来理解LiPSs由V2O3和VN的协同吸附.
- 制造和测试LiS电池电池与开发的功能介层和硫复合材料阴极.
主要成果:
- 功能介层有效地抑制了LiPS溶解,并提供了导电网络,增强了电子传输.
- VN/V2O3证明了LiPSs的强烈协同吸附,这是由于的空3d轨道和N/O原子的极性.
- 在0.2C时,LiS电池的初始放电容量达到1018.3 mAh g−1,在200个循环后保持802.5 mAh g−1和在2.0C时500个循环后保持540.1 mAh g−1.
- 即使具有高硫含量 (80 wt%和90 wt%) 的电化学性能也得到了良好表现.
结论:
- 从回收废物中开发的功能中间层有效地解决了LiS电池的关键挑战.
- VN/V2O3和中间层结构的协同效应显著提高了电化学性能和循环稳定性.
- 本研究提出了一种可持续和高效的战略,用于开发高性能LiS电池的先进材料.
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