文献类型：期刊文献

中文题名：碳布负载的ZnO/C/Ni(OH)_2纳米阵列的构建及电化学性能

英文题名：Synthesis and Electrochemical Properties of ZnO/C/Ni(OH)_2 Nanorod Arrays on Carbon Cloth

作者：汪谌[1];贾聪圃[1];何颖[1];刘艺军[1];程起林[1]

机构：[1]华东理工大学材料科学与工程学院超细材料制备与应用教育部重点实验室,上海200237

年份：2019

卷号：45

期号：1

起止页码：41

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

基金：国家重点研发计划(2016YFE0131200);国家自然科学基金(51702098)

语种：中文

中文关键词：碳布;氧化锌;氢氧化镍;超级电容器;电化学性能

外文关键词：carbon cloth;ZnO;Ni(OH)2;supercapacitor;electrochemical properties

摘要：以碳布(CC)为基体、氧化锌纳米棒为模板,2-甲基咪唑为有机配体,采用水热与高温碳化方法,在碳布表面构建氧化锌纳米棒阵列复合材料(ZnO/C);利用电沉积法在ZnO/C复合物表面生长氢氧化镍(Ni(OH)_2)纳米片,获得碳布负载的氧化锌/碳/氢氧化镍(ZnO/C/Ni(OH)_2)核壳结构纳米棒阵列。对获得的复合材料进行形貌和结构表征,并对其电化学性能进行了测试。结果表明:复合物纳米棒阵列均匀生长在碳布表面,纳米棒外层由纳米片状Ni(OH)_2相互交叉堆叠而成;该复合材料作为超级电容器的电极材料时,在1.0 A/g的电流密度下比容量可以达到1 051.9 F/g;当电流密度增大到10 A/g后,比容量仍有644.5 F/g;在5.0 A/g的电流密度下进行5 000次循环充放电后,复合电极的比容量仍保留87.1%,展现出良好的电化学性能。
Supercapacitors have received considerable attention in energy storage devices over the past ten years due to their fast recharge capability,high power performance,long cycle life and environmental benign.Electrode material is one of the crucial factors defining the electrochemical performance of supercapacitors.Rational design and optimization of the structure of electrode materials is an effective approach to enhance their electrochemical performance.In this study,a simple galvanostatic electrodeposition method is developed to grow ZnO nanorod arrays on the carbon cloth(CC).A thin layer of metal-organic framework(MOF)is coated on the surface of ZnO via hydrothermal method,followed by carbonization in N2 atmosphere at a high temperature for porous carbon layer to obtain ZnO/C composite nanorods.Subsequently,Ni(OH)2 nanoflakes are deposited on the surface of ZnO/C to form three-dimensional ZnO/C/Ni(OH)2 core-shell composite nanorod arrays on carbon cloth.The structure of Ni(OH)2 is adjusted by changing electrodeposition time and the optimal time is determined.The structural,morphological and electrochemical properties of ZnO/C/Ni(OH)2 are investigated.The hierarchical composite arrays may provide more electroactive sites,facilitate ion and electron transfer and thus result in remarkable electrochemical performance of the ternary composite electrode.The experimental results indicate that the ternary composite electrode material exhibites a high specific capacitance of 1051.9 F/g at a current density of 1.0 A/g and still remains 644.5 F/g as the current density is increased up to 10 A/g,and good cycling stability(87.1% capacitance retention after 5 000 cycles at 5.0 A/g),demonstrating excellent electrochemical performance of ZnO/C/Ni(OH)2 composite electrode.This facile method provides a new strategy for the design and application of metal oxides/porous carbon/metal hydroxides deposited on various substrates for advanced energy storage devices.