Preparation method of high-stability artificial solid electrolyte interface film material

A solid electrolyte, high stability technology, used in electrolyte layer coatings, electrode manufacturing, circuits, etc., can solve problems such as poor thermal stability and safety performance to be improved, achieve good mechanical properties, slow down the shuttle effect, and prevent the effect of precipitation

Active Publication Date: 2020-04-17
安徽沃奥动力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a method for preparing a high-stability artificial solid electrolyte interface membrane material in view of the poor thermal stability and safety performance of lithium-ion batteries currently using graphite as the negative electrode.

Method used

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  • Preparation method of high-stability artificial solid electrolyte interface film material

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Experimental program
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Effect test

Embodiment 1

[0028] According to the mass ratio of 1:15, add tantalum ethoxide to high-purity water, stir and mix to obtain a high-purity tantalum ethoxide aqueous solution, and then according to a volume ratio of 1:1, stir and mix absolute ethanol and tantalum ethoxide high-purity aqueous solution and place at 55°C Under the heat preservation reaction for 25 minutes, the heat preservation reaction solution was obtained and added dropwise to the heat preservation reaction solution according to the mass fraction of 5% ammonia water, and the pH was adjusted to 8.5. After the heat preservation reaction for 25 minutes, it was left to cool to room temperature and filtered. After rinsing for 3 times, vacuum-dry at 75°C for 20 hours, collect the dried matrix particles and place them in a muffle furnace, raise the temperature to 750°C at a rate of 5°C / min, heat-preserve and calcinate for 2 hours, and grind through a 200-mesh sieve to obtain matrix particles; According to the mass ratio of 1:1, lith...

Embodiment 2

[0030] According to the mass ratio of 1:15, add tantalum ethoxide to high-purity water, stir and mix to obtain a high-purity tantalum ethoxide aqueous solution, and then according to a volume ratio of 1:1, stir and mix absolute ethanol and tantalum ethoxide high-purity aqueous solution and place at 57°C Under the heat preservation reaction for 27 minutes, the heat preservation reaction solution was obtained and added dropwise to the heat preservation reaction solution according to the mass fraction of 5% ammonia water, and the pH was adjusted to 8.5. After the heat preservation reaction for 27 minutes, it was left to cool to room temperature and filtered, and the filter cake was collected and deionized water After washing for 4 times, vacuum dry at 77°C for 22 hours, collect the dried matrix particles and place them in a muffle furnace, raise the temperature to 800°C at a rate of 5°C / min, heat-preserve and calcinate for 2.5 hours, and grind through a 200-mesh sieve to obtain mat...

Embodiment 3

[0032] According to the mass ratio of 1:15, add tantalum ethoxide to high-purity water, stir and mix to obtain tantalum ethoxide high-purity aqueous solution, and then according to the volume ratio 1:1, stir and mix absolute ethanol and tantalum ethoxide high-purity aqueous solution and place at 58°C Under the heat preservation reaction for 28 minutes, the heat preservation reaction solution was obtained and added dropwise to the heat preservation reaction solution according to the mass fraction of 5% ammonia water, and the pH was adjusted to 8.5. After the heat preservation reaction for 28 minutes, it was left to cool to room temperature and filtered. After washing 4 times, vacuum dry at 78°C for 23 hours, collect the dried matrix particles and place them in a muffle furnace, raise the temperature to 835°C at a rate of 5°C / min, heat-preserve and calcinate for 2.5 hours, and grind through a 200-mesh sieve to obtain matrix particles; Then, according to the mass ratio of 1:1, sti...

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Abstract

The invention relates to a preparation method of a high-stability artificial solid electrolyte interface film material, and belongs to the technical field of lithium batteries. According to the technical scheme, an ion beam deposition method is adopted, the problems of large leakage current, large dielectric loss, easy breakdown in the pulse polarization process and the like are imptobrf when thelithium tantalate composite film material is prepared by the traditional sol-gel method to reduce dielectric loss and leakage current and enhance breakdown resistance, a lithium tantalate film is prepared by an ion beam enhanced deposition method, a complex film-forming structure is formed with the lithium ions to prevent precipitation and slow down the shuttle effect. Meanwhile, the deposition film compound prepared through the method has characteristics of no corrosivity and matching with all the battery components. The passivation film is formed by the compact structure of the deposition film, and the compound has high ionic conductivity so as to improve the cycle performance of the lithium battery and prolong the service life of the material.

Description

technical field [0001] The invention relates to a preparation method of a high-stability artificial solid electrolyte interface film material, belonging to the technical field of lithium batteries. Background technique [0002] With the gradual depletion of oil resources and the environmental pollution caused by vehicle exhaust emissions, new energy vehicles have become the main development direction of future vehicles and become a research hotspot in the industry. Lithium-ion batteries, as the nuclear components of new energy vehicles, have received more and more attention. [0003] In order to better meet the needs of users and solve the problem of mileage anxiety, it is inevitable to develop batteries with higher specific energy to extend the cruising range of vehicles. Improving the specific energy of lithium-ion batteries requires increasing the gram capacity of active materials, widening the voltage window of batteries, and developing high-voltage lithium-ion batterie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/139H01M10/0525
CPCH01M4/0407H01M4/139H01M10/0525Y02E60/10
Inventor 赵玲玲
Owner 安徽沃奥动力科技有限公司
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