A kind of ag concentration gradient three-dimensional skeleton and its preparation method and application

Abstract

The invention provides a method for preparing a three-dimensional Ag concentration gradient framework, comprising the following steps: dissolving a polymer material in an organic solvent, stirring continuously to form a uniformly dispersed solution a; taking multiple parts of the solution a, and adding them to each part of the solution a respectively Add different masses of silver salts to form solutions b with different concentrations of silver salts, and deposit the solutions b on the copper foil collectors in order of silver salt concentrations from large to small, and then heat-treat them to obtain solutions with Ag concentrations Gradient 3D skeleton. The three-dimensional framework prepared by this method can effectively solve the problems of short cycle life, low cycle reversibility and great safety hazards existing when the active metal lithium / sodium is used as the negative electrode of the battery.

Description

A kind of Ag concentration gradient three-dimensional framework and its preparation method and application technical field The invention belongs to battery technical field, be specifically related to a kind of Ag concentration gradient three-dimensional framework and preparation method and application thereof use. Background technique [0002] With the development of science and technology, the market for electric vehicles, unmanned aerial vehicles, humanoid robots, intelligent electronic equipment and other high There is an increasing demand for energy and power density portable power devices. The energy density of traditional lithium-ion batteries is no longer To meet the needs of the market, it is imminent to develop the next-generation high-energy-density battery system. Active metals (lithium, sodium, potassium, zinc, etc.), as a class of ideal battery anode materials, have been widely used in high energy density in battery systems. Taking lithium metal as an ...

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Problems solved by technology

[0004] Aiming at the above-mentioned problems in the prior art, the present invention provides a three-dimensional framework with Ag concentration gradient and its preparation method and application. The three-dimensional framework prepared by this method can effectively solve the problem of the existing active metal lithium / sodium as the negative electrode of the battery. There are problems of short cycle life, low cycle reversibility and great safety hazards

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