期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 926, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2022.166764
关键词
Li-S batteries; Metal-organic frameworks; Multifunctional integrated material; Ni (core)-NiO (shell) nanoparticles; Electrocatalysis
资金
- Applied Basic Research Program of Shanxi Province [201901D211064, 0302123118]
- Natural Science Foundation of Shanxi Province [201903D321056]
- National Natural Science Foundation of China [22178244, 2217080894]
- Debrider and Ecological Engineering Technology Co., Ltd
Designing electrodes with suitable structures for storing and fixing sulfur is an effective approach to overcome the shortcomings of lithium-sulfur batteries. In this study, a metal-organic frameworks derived nitrogen doped carbon material with core-shell Ni-NiO nanoparticles was fabricated. The electrode demonstrated high specific capacity and maintained good performance after multiple cycles.
Designing electrodes with structures suitable for storing and fixing sulfur to overcome the inherent shortcomings of lithium-sulfur (Li-S) batteries is an effective approach to achieving commercial application. Indeed, multifunctional electrodes constructed with sulfur immobilization substrate and efficient catalyst has dramatically improved the utilization of sulfur. However, structurally designing the substrate and achieving uniform dispersion of catalytic remain huge challenges. In this paper, a metal-organic frameworks derived flower shaped nitrogen doped carbon (NC) materials anchored with core-shell Ni-NiO nanoparticles loaded on carbon paper (CP) was fabricated, which equipped with 3D conductive network and hierarchical porous structure physically restrict polysulfide shuttling. Furthermore, well-proportioned Ni-NiO nanoparticles were induced into host to bond with polysulfides further catalyzed the electrochemical reaction. Notably, the S@Ni-NiO@NC/CP exhibited high specific capacity with 1332.9 mAh/g initial specific capacity at 0.5 C and maintained at 896.3 mAh/g after 200 cycles. And S@Ni-NiO@NC/CP can achieves an initial capacity of 1095.7 mA h g(-1) even with high sulfur loading of 4.6 mg/cm(2). Electrochemical test results indicated that the introduction of Ni-NiO catalyst can improve the kinetics and reduce the reaction overpotential (eta(E)), and further affects the value of concentration overpotential (eta(C)) ultimately leads to the increase of battery capacity. (c) 2022 Published by Elsevier B.V.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据