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One-Step Synthesis of Annual Ring-Shaped Planar Nitrogen/Sulfur Co-Doped Nanoporous Graphene for Supercapacitance
- Source :
- SSRN Electronic Journal.
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Heteroatom-doped nanopores graphene has great potential as emerging energy storage materials, but the complex synthetic routes and disordered structure limit the improvement of supercapacitance performance. Herein, we develop a one-step synthesis strategy to obtain nitrogen/sulfur doped nanopores graphene (NS-NG). Graphene oxides absorbed with dyes are burned in a confined interlayer to obtain porous hydrotalcite for preparing NS-NG. Interestingly, the NS-NG retains the morphology of multilayer graphene oxides coated with fiber rods before combustion, so it exhibits the annual ring -shaped structure, larger surface area, and highly porosity. Importantly, the NS-NG not only shows a high specific capacitance of 325 F g-1, and also has a high energy density of 25 Wh kg-1 at a high power density of 1906 W kg-1 with an excellent capacity retention of 86% after 10,000 cycles applied in the two-electrode symmetric supercapacitor at a current density of 2 A g-1 in 0.5 M Na2SO4 aqueous solution.
Details
- ISSN :
- 15565068
- Database :
- OpenAIRE
- Journal :
- SSRN Electronic Journal
- Accession number :
- edsair.doi...........744e2f3831b4bb5c72032a360aff60d7