石墨烯／聚3，4-乙烯二氧噻吩复合物的电化学制备及其在超级电容器中的应用

Electropolymerization of the 3,4-Ethylenedioxythiophene on the Graphene Nanosheet in Ionic Liquid for Supercapacitors

首次提出了一种在离子液体中在石墨烯表面用恒电流法聚合3,4-乙烯二氧噻吩(EDOT)单体制备石墨烯/聚3,4-乙烯二氧噻吩(石墨烯/PEDOT)复合物的方法。用原子力显微镜、扫描电镜等技术表征证明石墨烯/PEDOT复合物是由PEDOT纳米谷粒状颗粒分散在石墨烯片表面而组成的。将该复合物用作超级电容器电极材料时,在1.0 A.g-1的充放电比电流下得到的比电容值为181 F.g-1。同时,该材料还显现出较好的充放电可逆性和稳定性。

A novel high-performance supercapacitor electrode material based on graphene/Poly（3,4-ethylenedioxythiophene） （G/PEDOT） hybrid was synthesized via in situ electropolymerization of the 3,4-ethylenedioxythiophene （EDOT） monomer on the graphene nanosheet in ionic liquid for the first time. The morphology characterization of the G/PEDOT hybrid by AFM and SEM demonstrated that the grain-shape PEDOT particles with the average size of 80 nm×40 nm×2 nm were attached to the graphene sheet′s surface tightly. The average specific capacitance of 181 F·g^-1 of the hybrid was obtained in the potential range from 0 to 0.8 V at 1.0 A·g^-1 by charge-discharge analysis and the hybrid showed good charge/discharge reversibility and electrochemical stability as supercapacitor electrode.