Nitrogen and phosphorus co-doped porous carbon film @ polyaniline hybrid electrode material having interface covalent bond link, and preparation method of hybrid electrode material

Abstract

The invention relates to a nitrogen and phosphorus co-doped porous carbon film @ polyaniline hybrid electrode material having an interface covalent bond link, and a preparation method of the hybrid electrode material. The preparation method is characterized in that an anilino methyl triethoxysilane functional porous carbon film and aniline are dispersed into a water solution containing hexadecyl trimethyl ammonium bromide and camphorsulfonic acid, then an ammonium persulfate initiator is added into the dispersed solution, and camphorsulfonic acid-doped polyaniline (PANI) is enabled to be grafted with the surface of the porous carbon fiber film in situ, so that a firm and uniform coating layer having the covalent bond link is formed. Due to the existence of an interface covalent bond, porous carbon fibers having framework stability are effectively and firmly combined with a conductive PANI material with higher pseudocapacitance, the interaction between the porous carbon fibers and the conductive PANI material is enhanced, a larger Pi electron delocalization system is formed, the electron transfer between two phases is also changed into intrachain direct conduction from an interchain jump mode, and the specific capacitance and cyclic stability of the electrode material are further greatly improved; therefore, the nitrogen and phosphorus co-doped porous carbon film @ polyaniline hybrid electrode material is suitable for supercapacitors.

Description

technical field

[0001] The invention belongs to the field of material technology, and in particular relates to a nitrogen-phosphorus co-doped porous carbon film@polyaniline hybrid electrode material with interface covalent bonds and a preparation method thereof. Background technique

[0002] As an electrode material, polyaniline (PANI) has a high pseudocapacitive specific capacity, less self-discharge, low cost and excellent kinetic properties, but the diffusion of carriers (ions, etc.) inside the polyaniline material is slow, resulting in Capacitors have low power performance and poor cycle performance. Activated carbon fiber material has the characteristics of large specific surface area, developed and rich pore structure, high electrical conductivity, good chemical stability, flexibility and bendability, etc. It has been widely used in supercapacitor electrode materials in recent years, but its low energy density has become a constraint for its A bottleneck of the applic...

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