球状ZnCo-ZIF的制备及超电容性能  

Preparation and supercapacitor performance of spherical ZnCo-ZIF

作　　者：鲁珍[1] 钱晶 徐俊晖[1] 王亚珍[1] LU Zhen;QIAN Jing;XU Jun-hui;WANG Ya-zhen(Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education,School of Optoelectronic Materials and Technology,Jianghan University,Wuhan,Hubei 430056,China)

机构地区：[1]江汉大学光电材料与技术学院,光电化学材料与器件教育部重点实验室,湖北武汉430056

出　　处：《电池》2022年第5期538-542,共5页Battery Bimonthly

基　　金：光电化学材料与器件教育部重点实验室资助项目(2021年);工业烟尘污染控制湖北省重点实验室开放基金(HBIK2019-02)。

摘　　要：沸石咪唑酯骨架(ZIF)材料是极具前景的超级电容器电极材料。为得到高比电容、长循环寿命的ZIF结构电极材料,以硝酸锌、硝酸钴和2-甲基咪唑为原料,甲醇为溶剂,采用室温搅拌静置法制备锌-钴双金属ZIF(ZnCo-ZIF)材料,然后用0.2 mol/L KOH的甲醇-水(体积比2∶5)溶液分别进行1 h、3 h、5 h、7 h和9 h的搅拌处理,研究处理时间对超电容性能的影响。搅拌处理5 h得到的球形ZnCo-ZIF,电化学性能最佳:以1 A/g的电流在0~0.4 V充放电,比电容高达1 349 F/g;以10 A/g的电流循环1 000次,电容保持率达到77.4%。Zeolitic imidazolate frameworks(ZIF) material was highly promising electrode material for supercapacitors.In order to obtain ZIF electrode materials with high specific capacitance and long cycle life, zinc-cobalt bimetallic ZIF(ZnCo-ZIF) material was prepared using zinc nitrate, cobalt nitrate and 2-methylimidazole as raw materials and methanol as solvent by stirring and standing method at room temperature.Then ZnCo-ZIF was treated by stirring with 0.2 mol/L KOH methanol-water(volume ratio was 2∶5) solution for 1 h, 3 h, 5 h, 7 h and 9 h, respectively.The effects of treatment time on the performance of the supercapacitors were studied.Spherical ZnCo-ZIF obtained while treated for 5 h had the best electrochemical performance: when charged-discharged at a current of 1 A/g in 0-0.4 V,the specific capacitance was up to 1 349 F/g.The capacitance retention reached 77.4% when cycled at a current of 10 A/g after 1 000 cycles.

关 键 词：沸石咪唑酯骨架(ZIF) 锌-钴双金属ZIF材料 KOH搅拌处理 球状 

分 类 号：TM533[电气工程—电器]