New nanoporous biocarbons with iron and silicon impurities: Synthesis, properties, and application to supercapacitors

Abstract

The problem of coupling the porous structure of carbon materials with their electronic structure to achieve the maximum efficient operation of an electric double layer, i.e., the interfaces with the electrolyte, was considered. The initial materials for producing activated carbon were flax and field horsetail fibers. The effect of introducing iron-containing impurities into the initial raw flax material and natural silicon in the horsetail structure on the parameters of capacitive energy storage was studied. The investigation of the capacitance-voltage characteristics of the electric double layer, magnetic properties, and Raman spectroscopy data made it possible to propose a mechanism explaining the data obtained.