摘要
以P123为模板剂,与吡咯单体混合后,经过(NH 4)2S 2O 8氧化,氩气中900℃煅烧和KOH活化,获得了介孔碳纳米球MCNS.X射线衍射表明:其具有低的结晶性,对MCNS采用透射电镜和N 2吸附-脱附测试,表明MCNS是具有介孔分布的不规则纳米球.将MCNS作为超级电容器电极材料进行电化学测试,在2 mV/s的扫速下获得的电容值为148 F/g,在2~100 mV/s扫速范围的倍率性能为76%,经5 000圈循环测试后的保持率为92.2%.MCNS优异的电化学性能归因于电解液离子与其介孔的充分接触.
Carbon nanospheres with mesoporous pores(MCNS)were prepared by the mixture of P123 template and pyrrole monomers with the oxidation of(NH 4)2S 2O 8,sintering under Ar atmosphere at 900℃and activation by KOH.X-ray diffraction indicated that MCNS possessed poor crystallinity.Transmission electron microscope and N 2 adsorption-desorption isotherms were applied,which revealed that MCNS appeared as irregular nanospheres with mesopore distribution.As a supercapacitor electrode material,the electrochemical tests of MCNS were carried out.The obtained specific capacitance was 148 F/g at a scan speed of 2 mV/s.The rate capability of MCNS was 76%at the scan range of 2~100 mV/s.The capacitive retention ratio of MCNS over 5 000 cycles reached 92.2%.All the excellent electrochemical performances of MCNS are attributed to the sufficient contact between the electrolyte ions and its mesopores.
作者
辛国祥
王蒙蒙
张邦文
宋金玲
XIN Guoxiang;WANG Mengmeng;ZHANG Bangwen;SONG Jinling(Materials and Metallurgy School,Inner Mongolia University of Science and Technology,Baotou 014010,China)
出处
《内蒙古科技大学学报》
CAS
2019年第3期289-294,共6页
Journal of Inner Mongolia University of Science and Technology
基金
内蒙古自治区自然科学基金资助项目(2017BS0508)
内蒙古自治区科技创新引导计划基金资助项目(KCBJ2018032)
内蒙古科技大学创新基金资助项目(2016QDL-B01)
关键词
介孔
纳米球
模板法
电化学性能
超级电容器
mesopores
nanospheres
template approach
electrochemical performances
supercapacitors
