期刊
CHINESE CHEMICAL LETTERS
卷 34, 期 11, 页码 -出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cclet.2023.108152
关键词
Electrospinning; Carbon nanofibers; Supercapacitors; Heteroatom doping; Metal selenides
The design of pseudocapacitive materials by coupling transition metal compounds with a conductive carbon matrix is crucial for enhancing the performance of supercapacitors. In this study, NiCoSe4-NCNFs were synthesized by carbonizing and selenizing polyacrylonitrile nanofibers, which exhibited excellent capacitive behaviors in 1 mol/L KOH electrolyte due to accelerated ion diffusion, enlarged active surface area, and modified surface chemistry at NiCoSe4/NCNFs interfaces. This work provides a novel strategy for constructing high-performance supercapacitors using transition metal selenides/carbon nanofibers hybrids.
The design of pseudocapacitive materials by coupling transition metal compounds with a conductive car-bon matrix is important for the high performance of supercapacitors. Herein, we construct the Prussian blue analogue derived nickel-cobalt selenides coupling with nitrogen-doped carbon nanofibers (NiCoSe4 -NCNFs) by carbonization and selenization of polyacrylonitrile nanofibers. The effect of selenization and el-ement N doping on the morphological structure and surface chemistry of NiCoSe4-NCNFs are evaluated. Due to the accelerated electrolyte ion diffusion, enlarged active surface area and the modified surface chemistry by the strong interaction at NiCoSe4/NCNFs interfaces, NiCoSe4-NCNFs show excellent capaci-tive behaviors in 1 mol/L KOH, and the specific capacitance is 1257 F/g at 1 A/g with a rate capability of 78% and cyclic stability of 82.9%. The Gibbs free energy of adsorption OH- is calculated by density func-tional theory to investigate the charge storage mechanism. This work offers a new strategy to construct the transition metal selenides/carbon nanofibers hybrids for high-performance supercapacitor devices.& COPY; 2023 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.
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