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通过P-O_V-In₂O₃减缓和加速硫减少反应使高性能Li-S电池成为可能

Siyu Liu¹, Jiudi Zhang¹, Jinzheng Yang¹

¹College of Science, Hebei North University, Zhangjiakou, 075000, P. R. China.

Small (Weinheim an der Bergstrasse, Germany)

|November 29, 2024

概括

这项研究引入了配的氧化纳米圈 (P-O_V-In₂O₃NSs) 作为选择性催化剂,以加速-硫 (Li-S) 电池中缓慢的硫还原反应. 催化剂显著提高了硫的利用率和电池的性能.

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
催化剂是一种催化剂.

背景情况:

缓慢的硫还原反应 (SRR) 动力学阻碍了-硫 (Li-S) 电池的发展.
在SRR中,液体转化为固体的高激活能量导致聚硫化物积累和穿效应.
选择性催化剂对于优化SRR和提高Li-S电池性能至关重要.

研究的目的:

设计和合成用于Li-S电池的选择性催化剂.
为了应对缓慢的SRR动力学和聚硫化物穿效应的挑战.
通过催化剂修改来提高Li-S电池的整体性能.

主要方法:

理论计算指导了氧化催化剂的设计.
与氧气空隙 (P-O_V-In₂O₃ NSs) 配合的氧化物纳米圈的合成.
用P-O_V-In₂O₃NS进行分离器的修改,用于Li-S电池的测试.

主要成果:

P-O_V-In₂O₃ NSs证明了SRR的选择性催化特性.
带有修改分离器的电池显示出优异的硫利用率和速率性能 (656mAhg-1在5.0°C).
在1.0°C的500个循环中,每周期达到0.069%的低容量衰变率.

结论:

P-O_V-In₂O₃NS有效地减轻了Li-S电池中缓慢的SRR动力学.
催化剂通过提高硫利用率和循环稳定性来提高电化学性能.
这项工作为开发高性能Li-S电池提供了一个有前途的战略.

关键词:

印度氧化物印度氧化物氧气空缺的地方.兴奋剂是指的兴奋剂.有选择性的催化剂.硫还原反应反应的硫还原反应

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