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Preparation method of high-conductivity lithium ion solid-state electrolyte

A solid electrolyte and solid electrolyte technology, applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, circuits, etc., can solve problems such as poor environmental stability, and achieve the effects of improving conductivity, reducing energy, and increasing lithium ion concentration

Inactive Publication Date: 2018-04-10
GUIZHOU MEILING POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sulfide solid electrolytes often have high ionic conductivity, but due to their high hygroscopicity, their environmental stability is poor, and there is still a long way to go for practical commercial applications.

Method used

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  • Preparation method of high-conductivity lithium ion solid-state electrolyte
  • Preparation method of high-conductivity lithium ion solid-state electrolyte
  • Preparation method of high-conductivity lithium ion solid-state electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Put the raw CH 3 COOLi, Al(NO 3 ) 3 ·9H 2 O, Ti (OC 4 H 9 ) 4 , NH 4 H 2 PO 4 Weighing according to the molar ratio of 1.3:0.3:1.7:3, add the raw materials to the reaction beaker in turn, and keep stirring at room temperature to form a light yellow slurry; slowly add ammonia water to the reaction beaker, and at the same time add a small amount of deionized water, pH = 12; then the reaction beaker was magnetically stirred in a water bath at 90°C for 0.5h to form a uniform, stable and layered white precipitate. Transfer the stable and layered white precipitate to a crucible and place it in a blast drying oven, heat at 150 °C for 10 h and dry to obtain a white precursor; the precursor is heated in air at a heating rate of 5 °C / min to 800 °C, and kept at 800°C for 12h to obtain white powder. First grind manually for 5 minutes, and then use a planetary ball mill for 6 hours at a speed of 200 r / min. The grinding medium is zirconia spheres, and the mass ratio of the ...

Embodiment 2

[0026] Put the raw CH 3 COOLi, Al(NO 3 ) 3 ·9H 2 O, Ti (OC 4 H 9 ) 4 , NH 4 H 2 PO 4 Weighing according to the molar ratio of 1.5:0.3:1.7:3, add the raw materials into the reaction beaker in turn, and keep stirring at room temperature to form a light yellow slurry; slowly add ammonia water to the reaction beaker, and at the same time add a small amount of deionized water, pH = 12; then the reaction beaker was magnetically stirred in a water bath at 95°C for 1.5h to form a uniform and stable layered white precipitate. Transfer the stably stratified white precipitate to a crucible and place it in a blast drying oven, heat at 150 °C for 14 h and dry to obtain a white precursor; the precursor is heated to 750 °C at a heating rate of 5 °C / min in air, And kept at 750℃ for 10h to obtain white powder. First grind manually for 5 minutes, and then use a planetary ball mill for 6 hours at a speed of 200 r / min. The grinding medium is zirconia spheres, and the mass ratio of the s...

Embodiment 3

[0028] Put the raw CH 3 COOLi, Al(NO 3 ) 3 ·9H 2 O, Ti (OC 4 H 9 ) 4 , NH 4 H 2 PO 4Weighing according to the molar ratio of 1.4:0.3:1.7:3, add the raw materials into the reaction beaker in turn, and keep stirring at room temperature to form a pale yellow slurry; slowly add ammonia water to the reaction beaker, and at the same time add a small amount of deionized water, pH = 12; then the reaction beaker was magnetically stirred in a water bath at 80°C for 1 h to form a uniform, stable and layered white precipitate. Transfer the stably stratified white precipitate to a crucible and place it in a blast drying oven, heat at 150 °C for 14 h and dry to obtain a white precursor; the precursor is heated to 650 °C at a heating rate of 5 °C / min in air, and kept at 650°C for 8h to obtain white powder. First grind manually for 5 minutes, and then use a planetary ball mill for 6 hours at a speed of 200 r / min. The grinding medium is zirconia spheres, and the mass ratio of the sph...

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Abstract

The invention provides a preparation method of a high-conductivity lithium ion solid-state electrolyte. The solid-state electrolyte has a stoichiometric formula of Li1+xAlxTi2-x(PO4)3, wherein x is greater than or equal to 0 and less than or equal to 0.5. The invention provides an Al<3+>-doped NASICON-type lithium ion solid electrolyte, wherein x is equal to 0.3. The Al<3+>-doped NASICON-type lithium ion solid electrolyte reduces the energy needed by the lithium ion transition. Through control of preparation process parameters such as a heating rate, a pre-sintering temperature, pre-sinteringtime, a calcination temperature and calcination time, the solid-state electrolyte having excellent performances is prepared so that the solid-state electrolyte has ionic conductivity of more than 10-5S / cm at the room temperature and is conducive to the design and assembly of all solid state lithium ion batteries.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a preparation method of a high conductivity lithium ion solid electrolyte. Background technique [0002] With the development of the industrial society, the increase in energy usage and the increasingly depletion of non-renewable resources, people's demand for new energy is becoming more and more urgent, and the requirements for energy storage technology are becoming more and more strict. At present, the most widely used energy storage means is electrochemical energy storage, that is, the use of battery devices to perform electrochemical reactions to convert energy. Lithium-ion batteries have a very broad development prospect in terms of energy storage due to their high energy density and long service life. [0003] However, at present, commercial lithium-ion batteries often use organic electrolytes. Due to their flammability and leakage, there is a great safety ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/058
CPCH01M10/0562H01M10/058Y02E60/10Y02P70/50
Inventor 杨程响石斌万伟华王庆杰陈铤张云朋
Owner GUIZHOU MEILING POWER SUPPLY CO LTD
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