MXene/nitrogen-doped carbon foam composite material with 3D porous neuron-like structure and preparation method thereof

Abstract

The invention relates to an MXene/nitrogen-doped carbon foam composite material with a 3D porous neuron-like structure and a preparation method thereof. The composite material takes porous nitrogen-doped carbon foam as a skeleton, pores of the porous nitrogen-doped carbon foam are of a neuron-like structure, and MXene nanosheets are uniformly deposited on the surface of the skeleton and dispersedamong the pores of the porous nitrogen-doped carbon foam. According to the MXene/nitrogen-doped carbon foam composite material provided by the invention, stacking and aggregation of the MXene nanosheets are effectively prevented, the composite material as an electrode material can provide more contact sites, the permeation of electrolyte is promoted, an effective channel is provided for the transmission of ions in electrodes, the ion transfer is accelerated, the capacitance and the rate performance can be significantly improved, and the assembled all-solid-state supercapacitor device has highcompressibility and excellent cycle stability, and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of electrode materials composed of or including active materials, and specifically relates to a 3D porous neuron-like structure MXene / nitrogen-doped carbon foam composite material and a preparation method thereof. Background technique [0002] MXene, as a class of two-dimensional layered transition metal carbides and carbonitrides, has the general formula M n+1 x n T x , where M is an early transition metal, X is carbon and / or nitrogen, and T x Termination for surface functions, such as -OH, -F, -O. It has excellent electrical conductivity (up to 10000S cm -1 as an independent film) and mechanical properties, abundant surface functional groups, high energy and high power density. Therefore, the abundant redox-active surface sites and conductive metal carbide and nitride cores of MXene can provide high capacitance, making it a promising electrode material for supercapacitors. However, similar to other 2...

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Problems solved by technology

However, 3D macroporous MXene electrodes also have some problems. First, the structure of porous MXene is unstable and inelastic, and it is easily damaged under the action of external mechanical strain; second, its synthesis process is complicated and relatively expensive. Ecological pollution will also occur during the removal process

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