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多功能分离器工程通过FeCo₂O₄纳米板和导电添加剂用于高速率Li-S电池

Nannan Meng¹, Yicong Li¹, Ziming Tong¹

¹Nanjing Tech University Jiangsu Province China wangzhaogen@njtech.edu.cn.

|July 9, 2025

概括

研究人员使用FeCo2O4纳米片开发了一种改性分离器,以应对硫 (Li-S) 电池中的聚硫化物穿效应. 这一创新显著提高了电池的性能和寿命,为商业化铺平了道路.

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 (Li-S) 电池由于其理论上的高能量密度,对储能充满希望.
商业化受到挑战的阻碍,特别是聚硫化物穿效应.

研究的目的:

开发一种修改后的分离器,减轻Li-S电池中的聚硫化物穿效应.
为了提高电化学性能和Li-S电池的循环寿命.

主要方法:

通过水热沉和化合成二元过渡金属氧化物FeCo2O4纳米板 (FCO).
将FCO和超P (SP) 涂在聚烯分离器上,以创建FCOSP修改分离器.
使用FCOSP修改分离器对Li-S电池进行电化学测试.

主要成果:

由于FCO的催化和吸附性质,FCOSP分离器有效地抑制了聚硫化物穿效应.
带有FCOSP的Li-S电池在1C的1000个循环后显示出0.083%的低容量衰变率.
在1000次5C循环后,观察到0.07%的显著低容量衰减.

结论:

FeCo2O4在吸附和催化转化多硫化物方面表现出有效性.
修改后的FCOSP分离器为推进Li-S电池的商业化提供了一个可行的方法.
该研究强调了一项有希望的战略,以提高下一代电池的稳定性和性能.

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