Solid state electrolyte membrane electrical core layer structure interface processing method, and lithium electrical core structure

Abstract

The invention belongs to the technical field of lithium battery, and especially relates to a solid state electrolyte membrane electrical core layer structure interface processing method, and a lithiumelectrical core structure. The solid state electrolyte membrane electrical core layer structure interface processing method comprises following steps: a solid state electrolyte membrane is provided;an electrode active material layer is formed on the solid state electrolyte membrane so as to form a pre-electrical-core layer structure; a preset hot pressing temperature and a preset pressing pressure are adopted for hot pressing treatment of the pre-electrical-core layer structure, wherein the preset hot pressing temperature and the preset pressing pressure are the critical temperature and thecritical pressure of conversion of solid phase into mobile phase of the solid state electrolyte membrane. Under the preset hot pressing temperature and the preset pressing pressure, the solid state electrolyte membrane is converted from solid phase into liquid phase, so that the interface resistance between the solid state electrolyte membrane and the electrode active material is reduced preferably, and the conductivity of conductive ions between the solid state electrolyte membrane and the electrode active material is improved.

Description

【Technical field】 [0001] The invention relates to the technical field of lithium batteries, in particular to a method for treating the interface of a solid electrolyte membrane cell layer structure and a lithium cell structure. 【Background technique】 [0002] The sulfide solid-state electrolyte membrane has high ionic conductivity and excellent interfacial contact properties, and is suitable for the construction of high-performance solid-state lithium-sulfur batteries. Solid-state lithium-sulfur batteries have also attracted extensive attention due to their high safety and extremely high theoretical energy density. The high interfacial impedance of the electrolyte / electrode interface is a key issue faced by all-solid-state lithium-ion batteries, which limits the rate performance and power density of the batteries. The high interfacial impedance is mainly due to poor solid electrode / solid electrolyte interface contact, deterioration and mechanical failure of the interface con...

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Problems solved by technology

[0004] In order to overcome the interface problem between the solid-state electrolyte membrane and the electrode of the current all-solid-state lithium-sulfur battery, which leads to the unsatisfactory performance of the all-solid-state lithium-sulfur battery, the present invention provides a method that can improve the interface impedance between the solid-state electrolyte membrane and the electrode structure. , a solid-state electrolyte membrane cell layer structure interface treatment method to improve the conductivity of all-solid-state lithium-sulfur batteries

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