Preparation of Ginger Straw based Porous Carbon using One- step Pyrolysis Process as Electrode Material for Supercapacitor

摘要

Conventional preparation for porous carbon is expensive, complex, leading to a low yield. In this study,a one-step pyrolysis synthesis method without any chemical additive is designed based on the naturaltubular structures and components (rich in potassium) of the ginger straw. The physicochemical andelectrochemical performance of the product are studied, and the synthesis mechanism is discussed. Basedon the excellent hierarchical porous structure, the specific capacitance can reach 274 F g -1 (38.1 μF cm -1 ) @0.1 A g -1 , and the specific capacitance can retain 88% after 6000 cycles at the current density of 5A g -1 . The maximum energy density and power density can be 34.06 W h kg -1 and 4.35 kW kg -1 . Thisstudy provides a new perspective for designing preparation method based on the component andstructure characteristics of the raw material, and provide a new perspective on the treatment of gingerstraw waste.