两步催化对抗聚硫化物穿,以提高先进硫电池的氧化转换
Chengxiang Tian1,2, Pengcheng Li2, Xin Hu2
1Institute of Carbon Neutrality and New Energy, School of Electronics and Information, Hangzhou Dianzi University, Hangzhou, 310018, China.
Small (Weinheim an der Bergstrasse, Germany)
|November 12, 2023
概括
本研究引入了一种使用MoSe2/MoP异质连接的新型催化剂,以克服聚硫化物穿并提高硫电池的导电性,提高性能和稳定性.
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) 电池面临着重大挑战,包括多硫化物 (LiPS) 的穿效应和硫阴极导电性差.
- 这些问题严重限制了Li-S电池技术的实际应用和循环寿命.
研究的目的:
- 开发一种高效的催化剂和介层材料,以减轻穿效应并提高Li-S电池的导电性.
- 为了研究LiPSs的双抑制策略,使用在化胺泡上支的MoSe2/MoP异质连接.
主要方法:
- 制造化胺泡支持MoSe2 (NCF@MoSe2) 作为一个中间层.
- 通过化MoSe2合成MoSe2/MoP异质结催化剂,以增强LiPSs吸附和催化.
- 利用理论计算和现场拉曼光谱来阐明LiPS的定,扩散和穿效应抑制的机制.
主要成果:
- 该NCF@MoSe2介层和MoSe2/MoP异质连接证明了LiPSs的有效吸附和催化,实施双重抑制策略.
- 开发的材料显著提高了电导率,并抑制了穿效应,从而提高了电池的性能.
- 实现了高可逆性 (983mAhg-1在0.5°C的200个循环后) 和高速率容量 (889mAhg-1在5°C).
结论:
- 该研究提出了一个可行的策略,用于设计Li-S电池的先进介层和异质连接材料.
- MoSe2 / MoP异质连接催化剂为开发高性能和稳定的Li-S电池提供了一个有前途的解决方案.
- 这项工作有助于推进下一代储能解决方案的开发.
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