A Method for Preparing Glass Electrolyte with Effective Control of Water Vapor Removal Rate

Abstract

The invention discloses a glassy electrolyte preparation method capable of effectively controlling a water vapor removal speed. The method comprises the following steps: weighing reactants, grinding,dropping deionized water, continuously grinding, scraping into a small liner, covering the upper part of the small liner by an unsealed bag, sealing paste into the small liner, placing the small linerin the center of a large liner, uniformly filling with CaO powder, taking out the bag, inverting the liner cover of the small liner, covering the small liner, covering the liner cover of the large liner, sealing, putting into a reactor, adding the reactor into a drying oven, and reacting; taking out, immediately transferring into a glove box, cleaning impurity gases, digging out the reaction product in the small liner, grinding and drying; and transferring to the glove box, and cleaning impurity gases again, thereby obtaining the glassy electrolyte. According to the method disclosed by the invention, the water vapor removal speed is effectively controlled by adopting a relatively simple and economic method, water vapor produced in the reaction is successfully removed, and the solid glassyelectrolyte with excellent water absorption property is obtained.

Description

technical field [0001] The invention relates to the field of solid electrolytes for lithium ion batteries, in particular to a method for preparing glass electrolytes that can effectively control the removal rate of water vapor. Background technique [0002] In lithium-ion batteries, safety issues are the main barriers to battery development. At present, battery manufacturers can produce high-quality household electronic equipment, and battery safety accidents are controlled within one millionth. However, this failure rate is still very high for HEVs and BEVs. The destruction of a single battery pack will generate a large amount of heat and flames, which will be transmitted to adjacent battery packs and cause accidents to destroy the entire battery pack. Therefore, a lot of effort has been put into solving the safety problem of lithium-ion batteries at present. [0003] Traditional organic liquid electrolytes are widely used at present, but there are generally safety probl...

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Problems solved by technology

[0007] However, this solid glass electrolyte has strong water absorption, so it is necessary to strictly isolate the air during the preparation process and remove the water vapor generated by the reaction at high temperature, and the removal rate must be reasonably controlled

If it is too fast, the required structural transformation cannot take place during the reaction, and the resulting product is not conductive, and an ideal glass table solid electrolyte cannot be obtained; if it is too slow, the reaction time is too long and the generated water vapor may not be completely removed. Can't wait for expected product

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