Solid electrolyte structure and preparation method thereof, and lithium battery

Abstract

The invention especially relates to a solid electrolyte structure and a preparation method thereof, and a lithium battery, belonging to the technical field of lithium batteries. The solid electrolytestructure of the invention comprises a polymer lithium salt composite membrane and an inorganic porous membrane, wherein the inorganic porous membrane has a plurality of pore channels which are filledwith the polymer lithium salt composite membrane. The solid electrolyte structure provided by the invention integrates the characteristics of good structural flexibility and contact interface performance of an organic polymer solid electrolyte and the characteristics of high security and structural stability under high-voltage conditions of an inorganic solid electrolyte, so an all-solid-state lithium battery with good performance can be designed. A preparation method for a solid electrolyte in the invention can efficiently prepare an organic-inorganic hybrid solid electrolyte, is simple in process flow and can meet the demands of large-scale production and manufacturing.

Description

【Technical field】 [0001] The invention relates to the technical field of lithium batteries, in particular to a solid electrolyte structure, a preparation method thereof, and a lithium battery. 【Background technique】 [0002] As an important energy storage unit, lithium batteries have been widely used in electronic products, electric vehicles, renewable energy storage and other fields. Traditional liquid electrolyte lithium batteries that have been commercialized at this stage have problems such as low energy density, poor safety, and long charging and discharging times. In contrast, solid-state lithium batteries have the characteristics of high safety, long cycle life, high specific capacity, and high energy density, and are expected to develop into the next generation of commercial lithium batteries. [0003] The lithium battery in which the positive and negative electrode materials and the electrolyte are solid is called an all-solid lithium battery. The thickness of a si...

AI Technical Summary

Problems solved by technology

Among them, the organic polymer electrolyte has the characteristics of flexible structure and good contact interface performance; while the inorganic solid electrolyte has the characteristics of high safety and stable structure under high voltage conditions, but after it is assembled into a solid-state battery, the interface impedance between the electrolyte and the electrode is relatively low. High and poor cycle stability

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