摘要
研究采用一步电化学剥离和电沉积法,在含Na2SO4、HCl与苯胺(An)单体的混合溶液中,以柔性石墨纸为原料,利用电场条件下电解液离子定向迁移和苯胺单体的电聚合制备聚苯胺纳米线/自支撑石墨烯(PANI/SGr)复合材料。更具活性的新生SGr与PANI结合,显著提高了PANI/SGr复合材料的稳定性。PANI呈纳米线状均匀分布在SGr上,形成的三维网络结构所呈现出的孔隙促进了电解液离子扩散到复合材料的内部结构中。将PANI/SGr复合材料作为超级电容器电极材料进行电化学测试,2 mV·s^(-1)的扫速下获得的比电容为453 F·g^(-1)。在0.5~10 A·g^(-1)的电流密度范围内,PANI/SGr复合材料倍率性能达73.1%。在1 A·g^(-1)的电流密度下PANI/SGr复合材料经10000次充放电之后的循环稳定性仍高达87.3%。这表明PANI/SGr复合材料具有良好的电容性能和优异的循环稳定性,有望作为超级电容器电极材料。
The polyaniline nanowire/self-supported graphene(PANI/SGr)composite was synthesized by one-step electrochemical exfoliation and electrodeposition method using graphite paper.The directional migration of electrolyte ions and the electropolymerization of aniline monomers through the electrical field simultaneously occurred in the mixed solution including Na2SO4,HCl and aniline(An)monomers.The stability of the PANI/SGr composite is enhanced by the combination of the new-born SGr with high activity and PANI.The uniform distribution of the nanowire-like PANI is achieved on the surface of the SGr.The PANI nanowires lead to the formation of the threedimensional network architecture,where the existence of pores facilitates the diffusion of electrolyte ions into the internal structure of the PANI/SGr composite.The electrochemical tests of the PANI/SGr composite were conducted as a supercapacitor electrode material.The specific capacitance of 453 F·g^(-1)at a scan rate of 2 mV·s^(-1)is achieved.The rate capability of the PANI/SGr composite at the current densities of 0.5-10 A·g^(-1)is up to 73.1%.The cycling stability of the PANI/SGr composite is as high as 87.3%after 10000 discharge-charge cycles at the current density of1 A·g^(-1).All of these results indicate that the PANI/SGr composite possesses good capacitive performance and excellent cycling stability.The PANI/SGr composite is promising for supercapacitor electrode materials.
作者
辛国祥
王蒙蒙
翟耀
王艳辉
张邦文
宋金玲
刘晓旭
XIN Guoxiang;WANG Mengmeng;ZHAI Yao;WANG Yanhui;ZHANG Bangwen;SONG Jinling;LIU Xiaoxu(School of Materials and Metallurgy,Inner Mongolia of Science and Technology,Baotou 014010,China;College of Materials Science and Engineering,Yanshan University,Qinhuangdao 066004,China;Faculty of Physics,Hebei Normal University of Science and Technology,Qinhuangdao 066004,China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2021年第4期1272-1282,共11页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(51902085)
内蒙古自然科学基金(2017BS0508,2019MS02023)
河北省自然科学基金(E2019407123)
包头市青年创新人才项目。
关键词
一步法
聚苯胺
自支撑石墨烯
超级电容器
循环稳定性
one-step method
polyaniline
self-supported graphene
supercapacitors
cycling stability
