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精致的混合电催化剂,适度集成元素,可用于可靠的硫电池

Peiyao Liu¹, Lina Bai¹, Zuqi Han¹

¹Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, PR China.

Journal of colloid and interface science

|April 19, 2025

概括

一种新的混合电催化剂 (CoSe2-Co3O4-Se@CNTs) 在硫 (Li-S) 电池中有效地固定和催化多硫化物 (LiPS). 这提高了电池寿命和性能,展示了.

科学领域:

材料科学与工程材料科学与工程
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) 电池具有较高的理论能量密度,但由于聚硫化物 (LiPS) 穿,其周期寿命较差.
有效的 LiPS 固定和催化转换对于提高 Li-S 电池性能至关重要.

研究的目的:

设计和评估混合CoSe2-Co3O4-Se@CNTs电催化剂,以提高Li-S电池中的LiPS管理.
阐明在催化过程中的作用及其对电池稳定性的贡献.

主要方法:

一个混合 CoSe2-Co3O4-Se@CNTs 电催化剂的制造.
用合成的电催化剂修改一个分离器.
在现场进行X射线衍射 (XRD) 来研究反应机制.
对Li-S电池的电化学性能测试 (放电容量,容量保持,循环稳定性).

主要成果:

CoSe2-Co3O4-Se@CNTs电催化剂在吸附和催化LiPSs方面表现出协同效应.
在现场XRD发现在电荷放电反应中的积极参与.
带有修改分离器的Li-S电池具有高的初始放电容量 (在0.1°C时1412mAhg-1) 和出色的容量保留 (71%在400个循环后).
在较高的速率 (0.5C和1C) 观察到异常循环稳定性,衰变速率非常低 (每周期0.053%).

结论:

混合CoSe2-Co3O4-Se@CNTs电催化剂有效地固定和催化LiPS,显著提高Li-S电池的性能.
在电化学反应中发挥着积极而至关重要的作用,有助于增强循环稳定性.
这项研究提出了开发先进电催化剂以延长Li-S电池的使用寿命的有希望的战略.

关键词:

CoSe(2) -Co(3) -O(4) -Se@CNTs的使用情况电催化剂是一种电催化剂.硫电池的使用方法长寿长寿是一个问题.元素的元素是.

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