文献类型：期刊文献

英文题名：Systematic study on electrochemical performances of Co-Ni layered double hydroxides grown directly on stainless steel wire mesh

作者：Liang, Ying[1];Xu, Huimin[1];Zhang, Zhen[1];Fang, Bin[1]

机构：[1]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China

年份：2022

卷号：33

期号：34

起止页码：25768

外文期刊名：JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS

收录：;EI(收录号：20224312997761);WOS:【SCI-EXPANDED(收录号:WOS:000869623800001)】；

基金：The authors thank Research Center of Analysis and Test, 985 test platform of School of Chemical Engineering of East China University of Science and Technology for the technique support.

语种：英文

外文关键词：Electrochemical electrodes - Hybrid materials - Mesh generation - Molar ratio - Nickel compounds - Potassium hydroxide - Stainless steel - Transition metals - Wire

摘要：Transition metal cobalt-nickel hydroxides have been widely studied as electrode materials for hybrid supercapacitors (HSCs) due to their unique active component properties. Nevertheless, the influencing factors and optimization of their electrochemical performances are still being studied and discussed. In this paper, Co-Ni layered double hydroxide (LDH) porous structure assembled from nanosheets was formed directly on stainless steel wire mesh (SS) by potentiostatic deposition. The bimetallic synergistic effect and porous structure of Co-Ni LDHs are favorable to their electrochemical performances. The Co0.5Ni0.5(OH)(2)-SS (nominal composition) electrode has the optimal Co:Ni molar ratio, and its specific capacity values are 474.2 - 320.1 C g(-1) at different current densities (1-10 A g(-1)) in 1 M KOH electrolyte. In addition, the concentration of KOH electrolyte also plays an important role on the electrochemical mechanism and performances. Compared with 6 M KOH electrolyte, lower concentration (1 and 3 M) is much more conductive to the microstructural stability and electrochemical behaviors of Co0.5Ni0.5(OH)(2)-SS electrode. Moreover, the fabricated Co0.5Ni0.5(OH)(2)-SS//AC-SS HSC device exhibits a good cycling stability, and the maximum energy density is about 10.9 Wh kg(-1) at 548.0 W kg(-1).