Manufacture method of lithium lanthanum titanium oxide

A lithium-lanthanum-titanium oxide and compound technology, which is applied in the field of synthesis of lithium-lanthanum-titanium oxide compounds for solid-state electrolytes for lithium-ion batteries, can solve problems such as limited application and high price, and achieve simple and easy-to-operate experimental processes, lower synthesis temperature, and lower usage cost effect

Active Publication Date: 2007-05-30
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, few reports use wet chemical methods (such as sol-gel method) to synthesize LLTO, all of which use expensive alkoxide as raw material, which also limits its application.

Method used

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  • Manufacture method of lithium lanthanum titanium oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0033] Using ethanol as solvent, calcination at 800 °C to prepare Li 0.5 La 0.5 TiO 3 powder sample

[0034] 1) Ingredients: Lithium nitrate, lanthanum nitrate and tetrabutyl titanate were weighed according to the ratio of Li:La:Ti=1:1:2. And appropriate amount of acetylacetone. See the table below for specific weighing data.

[0035] raw material name

lithium nitrate

Lanthanum nitrate

Tetrabutyl titanate

Acetylacetone

Weighing quality (g)

6.895

32.49

68.06

4.00

[0036] 2) Sample preparation: dissolve the weighed lithium nitrate and lanthanum nitrate in 50ml of ethanol. Add appropriate amount of acetylacetone to tetrabutyl titanate and stir evenly. Adjust the pH value of the solution with acetic acid and control it within 1, then mix and stir the ethanol solution of lithium nitrate and lanthanum nitrate with the tetrabutyl titanate solution for about 30 minutes to obtain a clear and transparent solution.

[...

Embodiment 3

[0040] Using ethylene glycol monomethyl ether as a solvent, calcining at 800 °C to prepare Li 0.5 La 0.5 TiO 3 powder sample

[0041] 1) Ingredients: Lithium nitrate, lanthanum nitrate and tetrabutyl titanate were weighed according to the ratio of Li:La:Ti=1:1:2. And appropriate amount of acetylacetone. See the table below for specific weighing data.

[0042] raw material name

lithium nitrate

Lanthanum nitrate

Tetrabutyl titanate

Acetylacetone

Weighing quality (g)

6.895

32.49

68.06

4.00

[0043] 2) Sample preparation: dissolve the weighed lithium nitrate and lanthanum nitrate in 50ml of ethylene glycol monomethyl ether. Add appropriate amount of acetylacetone to tetrabutyl titanate and stir evenly. Use an appropriate amount of deionized water and acetic acid to adjust the pH value of the solution to within 1, then mix and stir the ethylene glycol monomethyl ether solution of lithium nitrate and lanthanum ni...

Embodiment 4

[0047] Using ethylene glycol monomethyl ether as solvent, calcining at 900 °C to prepare Li 0.5 La 0.5 TiO 3 powder sample

[0048] 5) Ingredients: Lithium nitrate, lanthanum nitrate and tetrabutyl titanate were weighed according to the ratio of Li:La:Ti=1:1:2. And appropriate amount of acetylacetone. See the table below for specific weighing data.

[0049] raw material name

lithium nitrate

Lanthanum nitrate

Tetrabutyl titanate

Acetylacetone

Weighing quality (g)

6.895

32.49

68.06

4.00

[0050] 6) Sample preparation: dissolve the weighed lithium nitrate and lanthanum nitrate in 50ml of ethylene glycol monomethyl ether. Add appropriate amount of acetylacetone to tetrabutyl titanate and stir evenly. Use an appropriate amount of deionized water and acetic acid to adjust the pH value of the solution to within 1, then mix and stir the ethylene glycol monomethyl ether solution of lithium nitrate and lanthanum nitr...

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Abstract

The invention discloses a making method of Li-La-Ti oxide in the lithium ion battery domain, which comprises the following steps: adopting lithium nitrate, lanthanum nitrate and butyl titanate as raw material with molecular formula as Li3xLa2/3-xTiO3 (0<x<0.16); setting the molar rate of Li, La and Ti at 1: 1: 2; adopting alcohol or ethylene glycol monomethyl ether as solvent; or adjusting pH value under 1 through water and acetate; drying solution; sintering under 800-900 deg.c for 2h; obtaining pure LLTO. the invention shortens experimental period and synthesizing temperature with grain size about 200nm, which possesses excellent compact and electric property.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, and relates to a method for synthesizing a solid electrolyte lithium lanthanum titanium oxide compound (LLTO) for lithium ion batteries. Background technique [0002] With the rapid development of electronic technology, a large number of portable electronic products such as notebook computers and mobile phones are increasingly widely used, and higher requirements are placed on secondary batteries that provide energy for these devices. Batteries are required to have smaller size, lighter weight and higher performance. Lithium-ion batteries are superior to other secondary batteries due to their high operating voltage, mass density, and energy density. Therefore, lithium-ion secondary batteries are being used and developed more and more widely. [0003] At present, the vast majority of commercially available electrolytes for lithium-ion batteries are in liquid or gel state. This type of electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G1/02C01G23/00C01F17/00C01D15/00H01M4/48H01M4/485
CPCY02E60/10
Inventor 南策文梅骜王晓亮
Owner TSINGHUA UNIV
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