Nanoscale/microscale porous graphene-like sheets derived from different tissues and components of cane stalk for high-performance supercapacitors

摘要: Different biomass components have different effects on the microstructures and physicochemical properties of biocarbons. And biocarbons still need to be further improved. Nanoscale/microscale graphene-like sheets are synthesized with KOH as micropore-forming agent, $$\hbox{Fe}(\hbox{NO}_{3})_{3}\cdot \hbox{9}\,\hbox{H}_{2}\hbox{O}$$ mesopore-forming agent graphite catalyst. It is systematically researched get them. Cane sugar can form flat nanosheets high conductivity. Their performance drops sharply at $$100\,\hbox{A g}^{-1}$$ , indicating that a support carbon skeleton operate normally current density. Bagasse pith contains amount cellulose hemicellulose, which good for forming pores. pith-derived possess large specific surface area ( $$2923.58\,\hbox{m}^{2}\,\hbox{g}^{-1}$$ ), capacitance $$514.14\,\hbox{F $$0.3\,\hbox{A $$372.57\,\hbox{F ) energy Due homogeneous coated doping nanosheets, sugarcane low impedance $$\text{R}_{\mathrm{s}}=0.02\,\Omega $$ rate capability (maintained 82.34% from 0.3 cycling stability 101.51% after 5000 cycles), better than lots graphene doping. Sugarcane skin more lignin has hexagonal rings. The graphitization extent skin-derived significantly high. results provide references select precursors, show novel method suitable materials various fields.