钴离子掺杂聚苯胺/石墨烯复合材料的制备及电化学性能研究  

Preparation and Electrochemical Performance of Polyaniline/Graphene Composite Doped With Cobalt Ion

作　　者：高鑫 陈娜丽[1] 冯辉霞[1] 谭琳[1] 熊双双 谈本刚 GAO Xin;CHEN Na-li;FENG Hui-xia;TAN Lin;XIONG Shuang-shuang;TAN Ben-gang(College of Petroleum and Chemical Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学石油化工学院,兰州730050

出　　处：《当代化工》2022年第4期849-853,859,共6页Contemporary Chemical Industry

摘　　要：采用一锅化学氧化聚合掺杂法制备了钴离子掺杂聚苯胺/石墨烯(PGC)复合材料,优化了Co^(2+)与苯胺(An)的摩尔比,研究了与石墨烯(RGO)的复合对钴离子掺杂聚苯胺(Co^(2+)-PANI)微观结构、形貌及电化学性能的影响,通过红外光谱(FT-IR)、扫描电镜(SEM)、X射线能谱(EDS)对PGC复合材料的结构和形貌进行了表征。结果表明:在Co^(2+)与An的摩尔比为0.8∶1时,PGC-0.8复合材料中出现分散有Co^(2+)-PANI纳米锥的RGO片层结构。该复合材料的电化学性能最佳:在电流密度为0.5 A·g^(-1)时,比电容为518.39 F·g^(-1),比Co^(2+)-PANI的比电容增加了40.61F·g^(-1);并且经过2000次循环后,比电容保持率为65.87%,较Co^(2+)-PANI(53.57%)的比电容保持率高12.3%。与RGO复合后,Co^(2+)-PANI的循环稳定性等电化学性能得到提升。The cobalt ion-doped polyaniline/graphene(PGC) composite was prepared by a one-pot chemical oxidative polymerization doping method. The molar ratio of Co^(2+)to aniline(An) was optimized, and the effect of the compounding graphene(RGO) on the microstructure, morphology and electrochemical properties of cobalt ion-doped polyaniline(Co^(2+)-PANI) was studied. The structure and morphology of PGC composites were characterized by infrared spectroscopy(FT-IR), scanning electron microscopy(SEM), and X-ray energy spectroscopy(EDS). The research results showed that when the molar ratio of Co^(2+)to An was 8∶1, the RGO sheet structure with Co^(2+)-PANI nanocones dispersed in the PGC-0.8 composite material appeared. The electrochemical performance of the composite material was the best when the current density was 0.5 A·g^(-1), the specific capacitance was 518.39 F·g^(-1), which was 40.61 F·g^(-1)higher than that of Co^(2+)-PANI;and after 2 000 cycles, the specific capacitance remains rate was 65.87%,which was 12.3% higher than that of Co^(2+)-PANI(53.57%). After compounding with RGO, the electrochemical performance of Co^(2+)-PANI such as the cycle stability was improved.

关 键 词：石墨烯 聚苯胺 钴离子掺杂 电化学性能 

分 类 号：TQ050.43[化学工程]