Li Shiyuan, Chen Yan, He Xin, Mao Xiling, Zhou Yujiu, Xu Jianhua, Yang Yajie
State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu, 610054, People's Republic of China.
College of Optoelectronic Technology, University of Information Technology, Chengdu, 610225, People's Republic of China.
Nanoscale Res Lett. 2019 Jul 9;14(1):226. doi: 10.1186/s11671-019-3051-6.
We report chemical in situ deposition of conducting polymer poly (3,4-ethylenedioxythiophene) (PEDOT) on reduced graphene oxide (rGO) nanosheets through a simple hydrothermal polymerization method. The functional groups on graphene oxide (GO) were directly employed as an oxidant to trigger the polymerization of 3,4-ethylenedioxythiophene (EDOT), and the GO nanosheets were reduced into rGO accordingly in an aqueous environment. Well anchoring of ultrathin PEDOT on rGO through this oxidant-free method was confirmed by UV-Vis spectrum, FT-IR spectrum, SEM, and TEM analysis. The obvious enhancement of conductivity was observed after the covering of PEDOT on rGO, and this composite showed high conductivity about 88.5 S/cm. The electrochemical performance results revealed that rGO/PEDOT composite electrode exhibits high specific capacitance about 202.7 F/g. The good synergetic effect between PEDOT and rGO also makes sure highly stable reversibility of composite electrode during charging/discharging process, and more than 90% initial capacitance retains after 9000 times cycles. In addition, the electrode based on rGO/PEDOT deposited on the cotton fabric shows excellent flexible ability with the evidence that 98% of the initial capacitance of electrode maintained after three thousands of free bending, which shows promising energy storage performance for flexible devices. .
我们报道了通过一种简单的水热聚合方法，在还原氧化石墨烯（rGO）纳米片上进行导电聚合物聚（3,4-乙撑二氧噻吩）（PEDOT）的化学原位沉积。氧化石墨烯（GO）上的官能团直接用作引发3,4-乙撑二氧噻吩（EDOT）聚合的氧化剂，并且在水性环境中GO纳米片相应地被还原为rGO。通过紫外-可见光谱、傅里叶变换红外光谱、扫描电子显微镜和透射电子显微镜分析证实了通过这种无氧化剂方法超薄PEDOT在rGO上的良好锚固。在rGO上覆盖PEDOT后观察到电导率明显提高，并且这种复合材料显示出约88.5 S/cm的高电导率。电化学性能结果表明，rGO/PEDOT复合电极表现出约202.7 F/g的高比电容。PEDOT和rGO之间良好的协同效应还确保了复合电极在充电/放电过程中具有高度稳定的可逆性，并且在9000次循环后保留了超过90%的初始电容。此外，基于沉积在棉织物上的rGO/PEDOT的电极显示出优异 的柔韧性，证据是在三千次自由弯曲后电极的初始电容保持了98%，这表明其在柔性器件中具有良好的储能性能。
