Composite electrode material and application thereof

Abstract

The invention discloses a composite electrode material and an application thereof. The composite electrode material comprises an electrode active material, oxide nanoparticles, a coating layer, an inorganic nano filler and a conductive agent, wherein the electrode active material comprises an electrode active raw material; the electrode active raw material is an anode active raw material or a cathode active raw material; the oxide nanoparticles are distributed on the surface of the electrode active raw material; the coating layer coats the electrode active material, and comprises an electrolyte material; the inorganic nano filler is dispersed in the electrolyte material; and the conductive agent is dispersed in the electrolyte material. An all-solid lithium ion battery prepared by the composite electrode material has the characteristics of low interfacial resistance, high safety performance, good chemical stability, high output energy density and the like.

Description

technical field [0001] The present invention relates to the field of energy materials, in particular, composite electrode materials and applications thereof, and more specifically, composite electrode materials, all-solid lithium-ion batteries and methods for preparing all-solid-state lithium-ion batteries. Background technique [0002] All-solid-state lithium-ion batteries have attracted more and more attention because of their high safety performance, high energy density, and excellent electrochemical stability. All-solid-state lithium-ion batteries are mainly composed of three parts: solid positive electrode, solid electrolyte, and solid negative electrode. Compared with commercial lithium batteries, the solid electrolyte material simultaneously plays the role of lithium salt, organic solvent and separator, thus simplifying the structure of the battery. , hinder the growth of lithium dendrites and improve the safety of the battery. In addition, all-solid-state lithium ba...

AI Technical Summary

Problems solved by technology

At present, all-solid-state lithium-ion batteries include thin-film all-solid-state lithium-ion batteries and bulk-type all-solid-state lithium-ion batteries. The large-scale industrialization process of thin-film all-solid-state lithium-ion batteries is hindered by their low energy density, low active material loading capacity, and The preparation cost is very expensive and other disadvantages

However, the large-scale all-solid-state lithium-ion battery cannot be mass-produced due to its huge interface resistance.

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