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Nanometer lithium aluminium titanium phosphate solid electrolyte material and preparation method therefor

A lithium titanium aluminum phosphate and solid electrolyte technology, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, electrolyte immobilization/gelation, etc., can solve the complex preparation process, long time-consuming and low yield of nano-LATP solid electrolyte materials and other problems, to achieve the effect of high yield, short time-consuming, simple and easy-to-control process

Active Publication Date: 2016-06-15
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] The technical problem to be solved by the present invention is that the preparation process of the existing nano-LATP solid electrolyte material is complex, time-consuming, and low in yield, etc.

Method used

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  • Nanometer lithium aluminium titanium phosphate solid electrolyte material and preparation method therefor
  • Nanometer lithium aluminium titanium phosphate solid electrolyte material and preparation method therefor
  • Nanometer lithium aluminium titanium phosphate solid electrolyte material and preparation method therefor

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preparation example Construction

[0043] In the preparation method of above-mentioned nanometer LATP solid electrolyte material, the lithium source described in step 1) is lithium nitrate or lithium isopropoxide etc.; The mol ratio of lithium source and aluminum trichloride, titanium tetrachloride and phosphoric acid is (1+x ):x:(2‐x):3, x=0.3~0.5.

[0044] In the preparation method of the above-mentioned nano-LATP solid electrolyte material, the heating temperature in step 1) is 30°C to 70°C. The heating method can be a common method such as a water bath or a constant temperature blast oven.

[0045] In the preparation method of the above-mentioned nano-LATP solid electrolyte material, the drying temperature in step 1) is 100°C-130°C, and the drying time is 4h-6h.

[0046] In the preparation method of the above-mentioned nano-LATP solid electrolyte material, the heat treatment in step 2) refers to keeping the temperature at 300° C. for 2 hours to 4 hours.

[0047] In the preparation method of the above-ment...

Embodiment 1

[0051] Embodiment 1 uses the method of the present invention to prepare LATP solid electrolyte material

[0052] According to the stoichiometric ratio in LATP (x=0.4), take 15.17g of titanium tetrachloride and 2.67g of aluminum trichloride and dissolve in absolute ethanol, continue stirring for 30min, then add 4.8g of lithium nitrate or 4.62g of isopropanol Lithium and 14.7g phosphoric acid, continue stirring for 2h. The above solution was heated at 30°C until a viscous gel was formed. The obtained gel was dried in a blast oven at 100°C for 6 h until it was completely dry. After the dried solid is fully ground in a mortar, put it in a muffle furnace and slowly raise the temperature to 300°C at room temperature and keep it warm for 4 hours, then heat it up to 800°C for 2 hours, and the average particle size is about 70 nanometers after the reaction is completed. LATP solid electrolyte material.

[0053] Put the above-mentioned LATP solid electrolyte material after ball milli...

Embodiment 2

[0054] Example 2 Preparation of LATP solid electrolyte material using the method of the present invention

[0055] According to the stoichiometric ratio in LATP (x=0.4), take 15.17g of titanium tetrachloride and 2.67g of aluminum trichloride and dissolve in absolute ethanol, continue stirring for 30min, then add 4.8g of lithium nitrate or 4.62g of isopropanol Lithium and 14.7g phosphoric acid, continue stirring for 2h. The above solution was heated at 50°C until a viscous gel was formed. The obtained gel was dried in a blast oven at 100°C for 6 h until it was completely dried. After the dried solid is fully ground in a mortar, put it in a muffle furnace and slowly raise the temperature to 300°C at room temperature and keep it warm for 4 hours, then raise the temperature to 800°C and calcinate for 2 hours. After the reaction is completed, the average particle size is about 80 nanometers. LATP solid electrolyte material.

[0056] Put the above-mentioned LATP solid electrolyte...

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Abstract

The invention belongs to the preparation technical field of a lithium ion battery solid electrolyte, and specifically relates to a nanometer titanium aluminium lithium phosphate solid electrolyte material and a preparation method therefor. The invention provides the preparation method for a nanometer solid electrolyte material; the chemical formula of the material is Li<1+x>Al<x>Ti<2-x>(PO4)3, wherein x is 0.3-0.5; and the average grain diameter is 70-100nm. The preparation method provided by the invention has the advantages of mild conditions, simple and easily-controlled process, short time consumption and high yield, and industrial production of the solid electrolyte material can be realized; the nanometer LATP (titanium aluminium lithium phosphate) solid electrolyte material provided by the invention has uniform and controllable grain diameters, relatively high conductivity, and can be used for preparation of the all-solid-state lithium ion battery.

Description

technical field [0001] The invention belongs to the technical field of preparation of solid electrolytes for lithium ion batteries, and in particular relates to a nanometer titanium aluminum lithium phosphate solid electrolyte material and a preparation method thereof. Background technique [0002] Due to the advantages of light weight, high energy density, good cycle performance, no memory effect, and environmental protection, lithium-ion batteries have broad application prospects in mobile communications, electric vehicles, and national defense technology. [1,2] . At present, lithium-ion batteries generally use liquid electrolytes, which can easily cause thermal runaway of lithium-ion batteries, resulting in combustion or even explosion of the battery. The development of all-solid-state lithium-ion batteries based on solid electrolytes can solve the safety hazards caused by liquid electrolytes [3,4] . Polymer and inorganic solid electrolytes are two important types of s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/058B82Y30/00
CPCB82Y30/00H01M10/0562H01M10/058H01M2300/0085Y02E60/10Y02P70/50
Inventor 张楚虹刘新刚
Owner SICHUAN UNIV
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