Preparation method for three-dimensional porous composite material

Abstract

The invention relates to a preparation method for a three-dimensional porous composite material. The method comprises the following steps that an inert metal salt solution and an active metal salt solution are provided; a substrate is provided, the surface of the substrate is electroplated with the inert metal salt solution, and a coating film M is formed; a carbon nanotube structure is arranged on the surface of the coating film M; the surface of the carbon nanotube structure is electroplated with the active metal salt solution, a coating film N is formed, the substrate is peeled, and a composite structure is obtained; the composite structure is subjected to high temperature annealing, and an alloy is formed by active metal and inert metal in the composite structure, and a preform is obtained; and the preform is etched into a porous structure, and the three-dimensional porous composite material is obtained.

Description

technical field [0001] The invention relates to a method for preparing a three-dimensional porous composite material, in particular to a method for preparing a three-dimensional porous composite material based on carbon nanotubes. Background technique [0002] At present, due to the high specific surface area, specific modulus and other characteristics of nanoporous metal materials, as well as the high thermal conductivity and high electrical conductivity of metal materials, they are widely used in catalysis, energy storage and conversion, biosensing, molecular It has broad application prospects in the fields of detection, noise reduction and vibration absorption, shielding, heat exchange, and electrochemistry. [0003] However, in the application process, the existing technology generally combines nanoporous metal materials themselves with other structures to obtain nanoporous metal composite materials. For example, the traditional assembly method of electrodes in devices i...

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Problems solved by technology

Although the nanoporous metal material unit has superior physical and chemical properties, the traditionally assembled macro-sized electrodes usually have a large internal resistance, which inhibits the high service performance of the nano-active material; and because the nanoporous metal composite material itself It is very brittle and does not have self-supporting properties, so that the obtained nanoporous metal composites still have problems of poor stability, low electrical conductivity and poor strength, which affect their applications

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