使用p-n异构连接二维服务矩阵操纵氧化动力学,作为实际硫电池的阴极硫不动化器和阳极稳定器
Xiaohang Du1, Chenxu Wen1,2, Yuhong Luo1
1School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China.
Small (Weinheim an der Bergstrasse, Germany)
|July 24, 2023
概括
这项研究引入了一种新的NiO-MoS2@CNFs异构结构,通过防止聚硫化物穿和树成长来稳定硫 (Li-S) 电池. 这种材料使得具有优良能量密度的高容量,稳定的Li-S电池.
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) 电池具有高能量密度,但受到多硫化物 (LiPS) 溶解和穿效应的阻碍.
- 树突性增长和缓慢的动力学进一步限制了实际的Li-S电池性能.
研究的目的:
- 设计一种新的p-n型异构结构,用于稳定Li-S电池.
- 为了解决LiPS溶解,穿效应和树突性Li生长的问题.
- 为了提高Li-S电池的性能和实用性.
主要方法:
- 在碳纳米纤维上使用n型MoS2纳米花和p型NiO纳米颗粒制造p-n型异构结构 (NiO-MoS2@CNFs).
- 利用异构结构作为阴极硫固定剂和阳极稳定剂.
- 在Li-S全细胞和囊细胞中对异构结构的特性和性能的描述.
主要成果:
- NiO-MoS2 @CNFs的异构结构有效地固定LiPS,并稳定金属阳极.
- 在Li-S全电池中实现了超过7.3 mAh cm-2的超高面积容量.
- 在低电解质/硫和容量比率下,经证明稳定的循环,袋式电池达到305Wh kg-1的能量密度和在曲下稳定的性能.
结论:
- 设计的p-n型NiO-MoS2 @CNFs异构结构显著克服了Li-S电池的关键限制.
- 这种先进的材料使得高性能,实用的Li-S电池具有更好的稳定性和能量密度.
- 该研究强调了异构结构在下一代储能解决方案中的潜力.
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