ZIF-8基三维分级多孔碳材料及其超级电容器的应用  

3D hybride-porous carbon derived from ZIF-8 for supercapacitor applications

作　　者：付兴平 胡家朋 刘瑞来 华伟平 FU Xingping;HU Jiapeng;LIU Ruilai;HUA Weiping(Fujian Provincial Bamboo Engineering Technology Reserach Center,Fujian Key Laboratory of Eco-Industrial Green Technology,College of Ecology and Resources Engineering,Wuyi University,Nanping 354300,Fujian Province,China)

机构地区：[1]武夷学院生态与资源工程学院福建省生态产业绿色技术重点实验室福建省竹材工程技术研究中心,福建南平354300

出　　处：《电子元件与材料》2018年第10期27-31,36,共6页Electronic Components And Materials

基　　金：福建省中青年教师教育科研项目(JT180552);武夷学院引进人才科研启动经费项目(YJ201703);福建省高等学校新世纪优秀人才支持计划(闽教科[2017]52号)

摘　　要：沸石咪唑酯骨架结构材料(ZIFs)具有孔径可调、高比表面积、优异化学稳定性和丰富的氮元素等优点,是制备多孔碳材料理想的前驱体。本文以自制ZIF-8为前驱体,经氮气气氛下950℃高温炭化制备三维分级多孔碳材料(3D-HPCs),显示出良好的电化学特性。该碳材料包含大量的微孔(<2 nm),以及部分中孔(2～4 nm),由于微孔、中孔和氮掺杂的协同作用,该三维分级多孔碳材料具有较高的电容特性和较低的离子扩散阻力。当电流密度为1 A/g时,3D-HPCs电极的比电容为187 F/g,当电流密度增至20 A/g,比电容保持率高达74%,展现出较高的比电容和良好倍率性能。循环寿命测试显示,在50 mV/s经5000次循环比电容无明显衰减,显示较好循环稳定性。With the advantage of adjustable aperture,high specific surface area,excellent chemical stability and abundant nitrogen atoms,zeolitic imidazolate frameworks(ZIFs)is the ideal precursor for the preparation of porous carbon materials.Herein,the self-made ZIF-8 was used as the precursor,3D hybride-porous carbon(3D-HPCs)with excellent electrochemical properties was prepared by carbonization at 950°C under nitrogen atmosphere.This carbon material contains large numbers of micropores(<2 nm)and parts of mesopores(2-4 nm).Due to the synergistic effect of micropores,mesopores and nitrogen,this 3D hybrideporous carbon has high capacitance characteristics and low ion diffusion resistance.It demonstrates a specific capacitance of 187 F/g under the current density of 1 A/g,when the current density is increased to 20 A/g,the specific capacitance retention rate is as high as 74%,demonstrating a high specific capacitance with excellent rate performance.The specific capacitance of it is well reserved after 5000 cycles at 50 mV/s,indicating favorable cycle stability.

关 键 词：超级电容器 ZIF-8 分级多孔碳材料 模板法 高温炭化 电化学性能 

分 类 号：TM53[电气工程—电器]