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Updated: Jul 16, 2025

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Co/CoS₂异质连接嵌入N,S-Doped空心纳米中,用于在高性能硫电池中增强聚硫化物转化

Ming Zheng¹, Junzhe Zhao¹, Wei Wu¹

¹College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China.

Small (Weinheim an der Bergstrasse, Germany)

|September 15, 2023

概括

这项研究引入了一种新的/二硫化物异构结构,通过优化聚硫化物转换来增强硫 (Li-S) 电池. 新的催化剂显著提高了电池容量和循环稳定性.

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
纳米技术纳米技术

背景情况:

高效的硫 (Li-S) 电池需要优化聚硫化物转换.
调节基板电子配置是改善多硫化物 (LiPSs) 化学吸收的关键.
在实现LiPSs的最佳吸附强度方面仍然存在挑战.

研究的目的:

设计一个Co/CoS2异构电催化剂,以提高Li-S电池的性能.
调整CoS2的d轨道电子结构,以改善LiPSs吸附.
为了研究碳纳米中N,S联合兴奋剂的协同效应.

主要方法:

理论模拟 (DFT) 用于预测电子结构和吸附性质.
制造一个集成到N,S共碳纳米 (Co/CoS2@NSC) 中的Co/CoS2异构结构.
使用开发的Co/CoS2@NSC阴极对Li-S电池进行电化学测试.

主要成果:

Co/CoS2异构结构产生了内置的电场,将d频段中心向下移动并优化LiPSs吸附.
Co/CoS2@NSC阴极表现出高特异性和出色的循环稳定性.
在8.18毫克厘米-2.2的高负载下实现了显着的8.25 mAh cm-2.
DFT计算证实了协同作用的N,S联合兴奋剂效应,并确定了有害的过度硫兴奋剂.

结论:

Co/CoS2 异构结构有效地调节了电子配置,以便在 Li-S 电池中更好地转换 LiPS.
Co/CoS2@NSC复合材料作为Li-S电池的高性能阴极材料具有显著的前景.
了解兴奋剂效应对于进一步优化催化剂设计至关重要.

关键词:

Co/CoS2 异质连接的异质连接没有,没有,没有,没有.S 配合使用兴奋剂.有空洞结构的结构.- 硫电池的使用情况.

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