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Method for coating through all-solid-state lithium-ion electrolyte material Li<7>La<3>Zr<2>O<12>

An electrolyte material, lithium-ion technology, applied in electrolytes, circuits, electrical components, etc., can solve the problems of reducing battery manufacturing costs, complicated operation, inconvenience, etc., and achieve the effect of avoiding burnout

Inactive Publication Date: 2016-04-13
QINGDAO NENGXUN NEW ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Third, some solid electrolytes are not sensitive to moisture and can maintain good chemical stability in the air for a long time. Therefore, the whole process of manufacturing solid-state batteries does not necessarily require the protection of an inert atmosphere, which will reduce the manufacturing cost of batteries to a certain extent.
The entire synthesis process has to go through two high-temperature treatments, and it takes tens of hours in total
It can be seen that its operation is complicated and inconvenient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Lithium acetate and lanthanum acetate are dissolved in water, the lithium ion concentration is 0.05mol / L, and the lanthanum ion concentration is 0.02mol / L;

[0024] (2) tetrabutyl zirconate is dissolved in the ethanol-acetic acid mixed solution that volume ratio is 1:5, and the concentration of tetrabutyl zirconate is 0.05mol / L;

[0025] (3) Under stirring, add 7.5mL of the solution of step (1) to 2mL of the solution of step (2), then 2g of ground lithium cobaltate powder, after ultrasonic wave for 30min, age for 12 hours to obtain a gel;

[0026] (4) After drying the gel in step (3) at 100°C for 2 hours, transfer it to a muffle furnace, heat up to 650°C at a rate of 2°C / min and calcinate for 3 hours, and cool naturally in the furnace to obtain coated Li 7 La 3 Zr 2 o 12 lithium cobalt oxide.

Embodiment 2

[0028] (1) Lithium acetate and lanthanum acetate are dissolved in water, the lithium ion concentration is 0.1mol / L, and the lanthanum ion concentration is 0.042mol / L;

[0029] (2) tetrabutyl zirconate is dissolved in the ethanol-acetic acid mixed solution that volume ratio is 1:7, and the concentration of tetrabutyl zirconate is 0.1mol / L;

[0030] (3) Add 7.2 mL of the solution of step (1) to 2 mL of the solution of step (2) under stirring, then 2 g of ground titanium disulfide powder, and age for 10 hours after ultrasonication for 50 minutes to obtain a gel;

[0031] (4) After drying the gel in step (3) at 80°C for 2 hours, transfer it to a muffle furnace, heat up to 600°C for 5 hours at a rate of 3°C / min and calcine for 5 hours, then cool naturally in the furnace to obtain coated Li 7 La 3 Zr 2 o 12 titanium disulfide solid powder.

Embodiment 3

[0033] (1) Lithium acetate and lanthanum acetate are dissolved in water, the lithium ion concentration is 0.075mol / L, and the lanthanum ion concentration is 0.03mol / L;

[0034] (2) tetrabutyl zirconate is dissolved in the ethanol-acetic acid mixed solution that volume ratio is 1:10, and the concentration of tetrabutyl zirconate is 0.025mol / L;

[0035] (3) Add 10 mL of the solution of step (1) to 8 mL of the solution of step (2) under stirring, then 2.5 g of ground lithium iron phosphate powder, after ultrasonic wave for 40 min, age for 12 hours to obtain a gel;

[0036] (4) After drying the gel in step (3) at 100°C for 1 hour, transfer it to a muffle furnace, heat up to 630°C for 5 hours at a rate of 2°C / min and calcine for 5 hours, then cool naturally in the furnace to obtain coated Li 7 La 3 Zr 2 o 12 lithium iron phosphate solid powder.

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Abstract

The invention discloses a method for coating through an all-solid-state lithium-ion electrolyte material Li<7>La<3>Zr<2>O<12>. The method comprises the following steps: (1) dissolving lithium acetate and lanthanum acetate into water; (2) dissolving zirconium n-butoxide into an ethanol-acetate solution; and (3) adding the solution obtained in the step (1) to the solution obtained in the step (2) under a stirring condition, adding a positive active material, carrying out ultrasonic treatment for 30-60 minutes, ageing for 10-12 hours, drying the obtained gel at 80-100 DEG C for 1-2 hours, heating the gel to 600-650 DEG C for burning for 3-5 hours, and naturally cooling the product to obtain the Li<7>La<3>Zr<2>O<12>-coated positive active material. Compared with an existing method, the method provided in the invention can make the burning temperature obviously lowered; and burning loss of a lithium element at a high temperature is avoided.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a lithium ion electrolyte material coated with an all-solid lithium battery. 7 La 3 Zr 2 o 12 Methods. Background technique [0002] In recent years, serious safety accidents have occurred in large-capacity lithium-ion batteries in the auxiliary power supply of electric vehicles and aircrafts. The cause of these problems is related to the use of flammable organic solvents in lithium-ion batteries. Although measures such as adding flame retardants, using high-temperature-resistant ceramic diaphragms, surface modification of positive and negative materials, optimizing battery structure design, optimizing BMS, coating phase-change flame-retardant materials on the outer surface of batteries, and improving cooling systems can achieve considerable To a certain extent, the safety of existing lithium-ion batteries can be improved, but these measures cannot f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/0525
CPCH01M10/0525H01M10/0562H01M2300/0077Y02E60/10
Inventor 林展刘培杨李全国高学会刘磊许阳阳
Owner QINGDAO NENGXUN NEW ENERGY TECH CO LTD
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