绣球花状CoAl双金属氢氧化物的合成及作为高性能超级电容器电极材料的研究  

Synthesis of hydrangea-like CoAl bimetallic hydroxides as electrode material for high-performance supercapacitor

作　　者：张悦 高春莉 徐迈 朱传高 王凤武 ZHANG Yue;GAO Chun-li;XU Mai;ZHU Chuan-gao;WANG Feng-wu(School of Materials Science and Engineering,Anhui University of Science&Technology,Huainan 232001,China;School of Chemistry and Materials Engineering,Huainan Normal University,Huainan 232038,China)

机构地区：[1]安徽理工大学材料科学与工程学院,安徽淮南232001 [2]淮南师范学院化学与材料工程学院,安徽淮南232038

出　　处：《现代化工》2025年第2期129-135,145,共8页Modern Chemical Industry

基　　金：国家自然科学基金(22078121)。

摘　　要：采用一步热液法在泡沫镍表面均匀生长3D绣球花状结构CoAl-LDHs。对比了不同形貌的CoAl-LDHs对电化学性能的影响。结果表明,当电流密度为1 A/g时,绣球花状的CoAl-LDHs的比电容为982.2 F/g,比块状的CoAl-LDHs的比电容(251.1 F/g)大。将绣球花状的电极材料与活性炭(AC)组装为超级电容器CoAl-LDH//AC,得到的最大功率密度为1.58 kW/kg,最大能量密度达249.5 Wh/kg,同时循环5 000次后得到改性后的CoAl-LDH//AC的电流保持率为85.5%,比改性前的电流保持率(60.2%)有较大提升。A one-step hydrothermal method is utilized to uniformly grow 3D hydrangea-like CoAl-LDHs on the surface of nickel foam.The effects of different morphologies of CoAl-LDHs on their electrochemical properties are compared.Study results show that the specific capacitance of hydrangea-like CoAl-LDHs is 982.2 F·g^(-1) under a current density of 1A·g^(-1),which is larger than that of block-shaped CoAl-LDHs(251.1 F·g^(-1)).The prepared hydrangea-like electrode material is assembled together with activated carbon(AC)to form CoAl-LDH//AC supercapacitor,which obtains the maximum power density of 1.58 kW·kg^(-1) and the maximum energy density of 249.5 Wh·kg^(-1).The current retention of modified CoAl-LDH//AC is 85.5%after 5000 cycles,comparing with the 60.2%before modification.

关 键 词：超级电容器 层状双氢氧化物 CoAl-LDHs 绣球花状 

分 类 号：TB333[一般工业技术—材料科学与工程]