کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5431697 | 1508822 | 2017 | 10 صفحه PDF | دانلود رایگان |
Based on a novel hierarchical porous reduced-graphene-oxide (RGO) film, all-solid-state flexible micro-supercapacitors (MSCs) with the high performances are fabricated through a one-step laser-carving approach. The macro/mesoporous RGO film, which is desirable for the ion transport and diffusion to be used as the electrode, was prepared from graphene oxide (GO) hydrogel by blade-casting and chemical reduction. The porous RGO film after mechanical compression was patterned to give interdigitated electrodes by irradiation with a picosecond laser. The results showed that the as-prepared in-plane MSCs exhibit a high areal specific capacitance of 37.95Â mFÂ cmâ2 at a current density of 0.6Â mAÂ cmâ2, and 36.38Â mFÂ cmâ2 at a scan rate of 10Â mVÂ sâ1, both of which are higher than most of the reported values for all-solid-state MSCs based on carbon materials. Meanwhile, the MSCs possess superior rate capability, good mechanical stability, excellent flexibility and long cycle life. For applications, the MSCs can be easily connected in series, parallel, or combined series and parallel to output high voltage and energy.
Based on the novel hierarchical porous RGO film, a one-step and scalable method is developed to fabricate high-performance flexible in-plane MSCs. The obtained MSCs exhibit the high areal specific capacitance compared with most of the reported carbon-based materials due to the macro/mesoporous structures of the electrodes.186
Journal: Carbon - Volume 125, December 2017, Pages 308-317