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一个分散的O_V-NiCo₂O₄纳米圈修饰分离器用于Li-S电池

Yumeng Gao¹, Siyu Liu¹, Jiudi Zhang¹

¹College of Sciences, Hebei North University, Photovoltaic Conductive Film Engineering Research Center of Hebei Province, Zhangjiakou 075000, China. zhanshuangjin23@163.com.

Dalton transactions (Cambridge, England : 2003)

|October 25, 2023

概括

在NiCo2O4纳米圈中的氧气空缺有效地固定了多硫化物,提高了硫电池的性能. 这种新型分离器修改克服了关键的商业化挑战,增强了电荷传输和离子传输,以实现稳定,高容量的能量存储.

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) 电池面临着诸如聚硫化物穿效应和导电性差等挑战,阻碍了商业化.
有效的聚硫化物 (LiPS) 固定和增强的电荷转移对于提高Li-S电池性能至关重要.

研究的目的:

设计和合成用于Li-S电池的新型分离器修饰材料.
为了解决穿效应并提高导电性,使用氧空位工程的NiCo2O4纳米球 (O-V-NiCo2O4 NSs) 来解决问题.

主要方法:

通过一种简单的方法合成O-V-NiCo2O4 NSs.
用合成的O-V-NiCo2O4 NSs修改电池分离器.
对修改后的Li-S电池进行电化学性能测试.

主要成果:

O-V-NiCo2O4 NSs表现出强烈的化学相互作用,加速了LiPSs的转化.
氧气空缺增强了电子导电和离子传输,为LiPSs提供了活跃地点.
经过修改的电池表现出了优秀的电化学性能:初始容量为0.5°C时801mA hg-1,500个循环后695mA hg-1 (87%的保留率).

结论:

O-V-NiCo2O4 NSs对于修改Li-S电池分离器是非常有效的.
开发的材料显著提高了电化学性能和循环稳定性.
这种方法为推进Li-S电池技术提供了一个有前途的战略.

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