Porous CuCo_(2)O_(4) microtubes as a promising battery-type electrode material for high-performance hybrid supercapacitors  

作　　者：Jiale Sun Xiaodong Tian Chunju Xu Huiyu Chen 

机构地区：[1]School of Materials Science and Engineering,North University of China,Taiyuan,030051,China [2]CAS Key Laboratory of Carbon Materials,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan,030001,China

出　　处：《Journal of Materiomics》2021年第6期1358-1368,共11页无机材料学学报（英文）

基　　金：This research was financially supported by the Natural Science Foundation of Shanxi Province(201801D221371).

摘　　要：Hollow nanostructures of transition metal oxides(TMOs)with hollow interior,low density,large surface area and surface permeability have drawn significant interest as electrode materials for supercapacitors.However,it is still challenging to controllably prepare hollow nanostructures by a facile method.Herein,we report for the first time that CuCo_(2)O_(4 )microrod precursor obtained from a solvothermal method in ethanol media can be converted into porous CuCo_(2)O_(4 )microtubes(CuCo_(2)O_(4 )MTs)in the post annealing treatment.The results of electrochemical tests demonstrate that these MTs are categorized as the typical battery-grade electrode materials.They can deliver a high capacity up to 393.66 C g^(-1) at ^(-1) A g^(-1) and still hold 305.99 C g^(-1) at 10 A g^(-1).Additionally,an assembled hybrid supercapacitor(CuCo_(2)O_(4 )MTs//AC HSC)exhibits 78.23 F g^(-1),good cycling durability and high energy density(32.49 W h kg^(-1) at 912.10 W kg^(-1)).The present synthetic methodology may be further applicable to the preparation of other hollow structural TMOs with applications in high-performance energy storage and conversion devices.

关 键 词：CuCo_(2)O_(4) Hybrid supercapacitors Hollow structure Battery-type 

分 类 号：O64[理学—物理化学]