Liquid phase synthesis of dendritic nickel carbide alloy with high conductivity for advanced energy storage

作     者：Mao-Cheng Liu Yu-Mei Hu Wen-Ya An Ling-Bin Kong Long Kang 

作者机构：State Key Laboratory of Advanced Processing and Recycling of Non-ferrous MetalsLanzhou University of TechnologyLanzhou 730050GansuChina School of Materials Science and EngineeringLanzhou University of TechnologyLanzhou 730050GansuChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2017年第26卷第4期

页      面：750-756页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(grant no.21403099) the Natural Science Foundation of Gansu Province(grant no.145RJZA193) the Natural Science Funds for Distinguished Young Scholars of Gansu Province(grant no.1606RJDA320) 

主　　题：Nickel carbide alloy Dendritic Electrical conductivity Asymmetric supercapacitor 

摘      要：Alloy materials have attracted increasing attentions because they possess superior electrical conductivity which can contribute to excellent electrochemical performance. Herein a dendritic Ni;C alloy material has been prepared by the pyrolysis of nickel acetylacetonate employing oleylamine as a reductant and 1-octadecene or octadecane as the solvent. The current–voltage curves indicating that the electrical conductivity of Ni;C is higher than that of nickel oxide. Electrochemical testing indicates that a high specific capacity of 390 C/g is found in alkaline electrolyte at 0.5 A/g, and deliver excellent rate characteristic as well as cycle life. The excellent electrochemical performance may be attributed to its high electrical conductivity and dendritic nanostructure that can promote diffusion of electrolyte ions. In addition, the AC//Ni;C asymmetric supercapacitor has been assembled at a cell voltages between 0 and 1.6 V, achieving a maximum energy density of 37 Wh/kg（at a power density of 0.3995 k W/kg）, and this manifests that the Ni;C alloy is a promising electrode material for electrochemical energy storage.