Solid-state electrolyte, preparation method thereof and all-solid-state battery

Abstract

A solid electrolyte (1). The solid electrolyte (1) has channels (3) that have a spatial configuration matching conductive particles (2) so as to specifically identify the conductive particles (2). The preparation method for the solid electrolyte (1) comprises the steps of: 1) adding, to a solvent, a functional monomer, conductive particles (2), an initiator, and a crosslinking agent for crosslink polymerization, the functional monomer comprising a polymerization monomer and lithium salt, such that a polymer network structure wrapping the lithium salt and the conductive particles (2) is formed; 2) removing the conductive particles (2) in the polymer network structure using an eluent; 3) removing the solvent to obtain a solid electrolyte (1), the solid electrolyte (1) having channels (3) that have a spatial configuration matching the conductive particles (2) to specifically identify the conductive particles (2). An all-solid battery comprises a positive electrode sheet, a negative electrode sheet, and the solid electrolyte (1). The solid electrolyte (1) has high ion conductivity, high compatibility with the positive electrode / negative electrode interface, and low interfacial impedance, so that the electrical performance of the all-solid battery using the solid electrolyte (1) is greatly improved.

Description

technical field [0001] The invention belongs to the field of batteries, and relates to a solid electrolyte, a preparation method of the solid electrolyte, and an all-solid battery including the solid electrolyte. Background technique [0002] In recent years, with the rapid development of telecommunications, electric vehicles and other industries, rechargeable batteries for power, energy storage and other purposes have also shown rapid growth. The improvement of global environmental protection requirements and the development of new vehicles such as electric vehicles will promote the rapid development of battery industries such as lithium-ion batteries, lithium-sulfur batteries and lithium-air batteries. However, there are certain safety problems in the actual application of rechargeable batteries, mainly because the organic electrolyte in them is prone to volatilization and leakage, which can easily induce safety accidents such as fire and explosion. The all-solid-state ba...

AI Technical Summary

Problems solved by technology

However, solid-state electrolytes have the characteristics of poor compatibility with the electrode interface, large interface impedance, and low ionic conductivity, which limit the research progress of solid-state batteries.

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