MXene/polypyrrole paper-based electrode material and preparation method and application thereof

Abstract

The invention discloses an MXene / polypyrrole paper-based electrode material as well as a preparation method and application thereof. The process comprises the following steps: loading MXene on paper through an impregnation process, sequentially impregnating the paper loaded with the MXene in a lignosulfonic acid solution and a pyrrole solution, and finally carrying out a polymerization reaction in a ferric trichloride hydrochloric acid solution to obtain the MXene / polypyrrole paper-based composite material. According to the invention, the operations of soaking loading and polymerization reaction can be repeated for 0-5 times to obtain MXene / polypyrrole paper-based composite materials with different layer numbers. The multilayer MXene / polypyrrole paper-based composite material obtained through layer-by-layer self-assembly has a good interpenetrating network structure, so the electrical properties of the MXene / polypyrrole paper-based composite material are improved. The invention provides a new thought and method for producing the polypyrrole paper-based electrode with good electrical properties, and has potential application prospects in flexible electronic devices.

Description

technical field [0001] The invention belongs to the field of flexible supercapacitors, and in particular relates to an MXene / polypyrrole paper-based electrode material and a preparation method and application thereof. Background technique [0002] Flexible electronics such as folding screen mobile phones, electronic skins, and flexible displays are the next development trend of the electronics industry. In order to match flexible electronics, the development of flexible energy storage devices has become a research hotspot in recent years. Flexible supercapacitors have become one of the important energy storage devices for flexible electronics because of their high energy density, power density, and good mechanical properties. Flexible electrodes are key components in the preparation of high-performance flexible supercapacitors, which consist of substrates and active materials. In recent years, polypyrrole paper-based electrodes have become a potential flexible supercapacit...

AI Technical Summary

Problems solved by technology

Li et al. modified the paper surface with polyethyleneimine and dipped it into the MXene solution to deposit MXene into the paper, then dipped it into the pyrrole solution, and loaded polypyrrole onto the paper surface by one-pot in-situ polymerization to obtain Mxene / poly Pyrrole paper-based composite materials, but the polypyrrole and MXene obtained by this method have a very low loading on the surface of the paper, and their electrical properties are not good [Xiaolong Li, Junnan Hao, Rong Liu, et al. Interfacing MXene flakes on fiber fabric as an ultrafastelectron transport layer for high performance textile electrodes[J].EnergyStorage Materials,2020,33:62-70]

Yan et al. dipped cotton fabric into MXene solution to combine with MXene, and then used electrodeposition to deposit polypyrrole on the surface of MXene to obtain Mxene / polypyrrole paper-based composite materials, although MXene on the surface of paper can provide polypyrrole with good conductivity. active layer, but there are still many gaps on the surface of the paper, and no continuous conductive network is formed to make it have a large surface resistance. The polypyrrole loading formed by the electropolymerization process is low, resulting in poor overall electrical properties [Jinfeng Yan, Yanan Ma ,Chuankun Zhang,et al.Polypyrrole-MXene coatedtextile-based flexible energy storage device[J].The Royal Society of Chemistry,2018,8,39742–39748]