基于三维多孔石墨烯/含钛共轭聚合物复合多孔薄膜的柔性全固态超级电容器

摘要

采用Fe3+离子交联的方法制备氧化石墨烯水凝胶,经化学还原制备出一种新型的三维多孔石墨烯薄膜材料命名为rGO-Fe;通过电化学聚合法在rGO-Fe基底上进一步制备了一种三维多孔石墨烯/含钛共轭聚合物复合薄膜材料,命名为rGO-Fe/P(EDOT:P3C)-1-Ti.作为一种新型复合薄膜材料,rGO-Fe/P(EDOT:P3C)-1-Ti较rGO-Fe具有更好的抗拉伸性能,平均厚度为3μm的rGO-Fe/P(EDOT:P3C)-1-Ti薄膜,可承受载荷拉力0.97 N,优于相同厚度的rGO-Fe薄膜(0.76 N).将rGO-Fe/P(EDOT:P3C)-1-Ti薄膜作为自支撑电极制备了柔性全固态超级电容器,表现出优良的电容性能,且在弯折状态下仍能正常工作.当电流密度为0.1A·g-1时,该柔性全固态超级电容器的质量比容量为71.13·F·g-1,面积比容量为101 mF·cm-2,当电流密度为0.6A·g-1时,其质量比容量为18.14 F·g-1,面积比容量为25.8 mF·cm-2.%A new three-dimensional (3D) porous graphene thin film named rGO-Fe was prepared through chemical reduction from Fe3+ ions cross-linking graphene oxide hydrogel,and a 3D porous graphene/titanium-containing conjugated polymer composite film named rGO-Fe/P(EDOT:P3C)-1-Ti was further prepared via electrochemical polymerization on the rGO-Fe substrate.As a new composite film,rGO-Fe/P(EDOT:P3C)-1-Ti film with average thickness of 3 μm can withstand the tensile load 0.97 N which is better than that of rGO-Fe (0.76 N).We compared the electrochemical properties of these film materials,and prepared self-supporting electrodes and a flexible all-solid-state supercapacitor based on rGO-Fe/P(EDOT:P3C)-1-Ti.Galvanostatic charge-discharge test results showed that the as prepared flexible supercapacitor delivered a gravimetric specific capacitance of 71.13 F·g-1 (18.14 F·g 1) and an area specific capacitance of 101 mF·cm 2 (25.8 mF·cm-2) at 0.1 A·g 1 (0.6 A·g-1).