(CoFe)Se_(2)@NC超级电容器电极材料的制备及其电化学性能  

Preparation of(CoFe)Se_(2)@NC Electrode Material and Its Electrochemical Properties in Supercapacitors

作　　者：李宽 肖倩 卞梓垚 李凯楠 赵匡健 曹海静 朱燕艳 方泽波[2] Li Kuan;Xiao Qian;Bian Ziyao;Li Kainan;Zhao Kuangjian;Cao Haijing;Zhu Yanyan;Fang Zebo(College of Mathematics and Physics,Shanghai University of Electric Power,Shanghai 200090,China;School of Mathematical Information,Shaoxing University,Shaoxing 312000,China)

机构地区：[1]上海电力大学数理学院,上海200090 [2]绍兴文理学院数理信息学院,浙江绍兴312000

出　　处：《微纳电子技术》2022年第2期133-139,共7页Micronanoelectronic Technology

基　　金：国家自然科学基金资助项目(51672172,51872186)。

摘　　要：金属-有机框架(MOF)衍生的过渡金属硒化物和多孔碳纳米复合材料具有巨大的储能优势,是应用于电化学储能的优良电极材料。采用共沉淀法制备CoFe类普鲁士蓝(CoFe-PBA)纳米立方,并通过静电组装在CoFe-PBA上包覆聚吡咯(PPy)得到CoFe-PBA@PPy;通过在400℃氮气中退火并硒化成功制备了氮掺杂的碳(NC)包覆(CoFe)Se_(2)的(CoFe)Se_(2)@NC纳米复合材料,并对其结构和形貌进行了表征。以(CoFe)Se_(2)@NC为电极制备了超级电容器,测试了其电化学性能,结果表明,在电流密度1 A/g时超级电容器的比电容达到1047.9 F/g,在电流密度5 A/g下1000次循环后具有良好的循环稳定性和96.55%的比电容保持率。由于其性能优越、无毒、成本低和易于制备,未来(CoFe)Se_(2)@NC纳米复合材料在超级电容器中具有非常大的应用潜力。Metal-organic framework(MOF)derived transition metal selenides and porous carbon nanocomposites have great energy storage advantages,and are the superb electrode materials for electrochemical energy storage applications.CoFe-prussian blue analogue(CoFe-PBA)nanocube was prepared by the coprecipitation method,and CoFe-PBA@PPy was obtained with polypyrrole(PPy)coated on CoFe-PBA by electrostatic assembly.(CoFe)Se_(2)@NC nanocomposites with nitrogen doped carbon(NC)coated on(CoFe)Se_(2)were successfully prepared by annealing and selenidation in nitrogen at 400℃.The structure and morphology of(CoFe)Se_(2)@NC nanocompo-sites were characterized.By using(CoFe)Se_(2)@NC as electrode,the supercapacitors were prepared,and their electrochemical properties were tested.The results show that the specific capacitance of the supercapacitor reaches 1047.9 F/g at 1 A/g current density,and the supercapacitors have good cycle stability and 96.55%specific capacitance retention rate after 1000 cycles at 5 A/g current density.Due to their superior performance,non-toxic,low cost and easy preparation,(CoFe)Se_(2)@NC nanocomposites have great application potential in supercapacitor in the future.

关 键 词：超级电容器 纳米材料 复合材料 共沉淀法 金属-有机框架(MOF) 电化学储能 

分 类 号：TB383[一般工业技术—材料科学与工程] TB33