基于石墨烯膜的全固体柔性超级电容器
基于石墨烯膜的全固体柔性超级电容器 杨希，陈永胜*
南开大学高分子研究所，天津市南开区卫津路94号，300071
*Email: [email protected]
近些年，轻薄、柔性的储能器件得到大家越来越多的关注[1]。本文中，我们将抽滤得到的氧化石墨烯膜通过不同的还原后作为超级电容器的电极；PVA-H2SO4作为固体电解液制备出了全固体柔性的超级电容器，并通过恒电流充放电测试了其电容性能和循环稳定性。经过对比肼蒸汽、HI酸、肼蒸汽-HI酸这三种还原方式得出肼蒸汽-HI酸这种还原方式最好。通过测试，在100mA/g的充电电流下，电容性能达到了240F/g。
Fig. a） Galvanostatic charge/discharge curves at 100 mA/g , b）Cycling stability of the all-solid-state device upon
charging/discharging at a current density of 100 m A g-1.
关键词：石墨烯膜；柔性；全固体；超级电容器
参考文献
[1] Meng, C.Z., Liu, C.H.,* Chen, L.Z., Hu, C.H., Fan, S.F. Nano Letter. 2010, 10: 4025.
Highly Flexible and All-Solid-State
Supercapacitors Based on the R-GO Films *
Institute of Polymer Chemistry, Nankai University, Wenjin Rd 94, Tianjin, 300071
In recent years, much effort have been dedicated to achieve thin, lightweight and even flexible energy-storage devices[1].In this paper, The all-solid-state flexible supercapacitors were fabricated by a simple two-step approach. First, The GO dispersion was filtered by a vacuum filter to produce GO films. And the GO films were reductived by different methods including N2H4, HI and N2H4-HI. Second, the soakage and solidification of two slightly separated electrodes in the H2SO4-PVA gel electrolyte. Through the Galvanostatic charge/discharge performace tests, the N2H4-HI reduced GO films had the best performance result. The devices showed high specific capacitance (240 F/g at 0.1A/g) and excellent electrochemical stability.