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Lithium lanthanum zirconium tantalum oxide solid electrolyte and preparation method and application thereof

A solid electrolyte, lithium lanthanum zirconium technology, applied in electrolytes, non-aqueous electrolyte battery electrodes, electrolyte immobilization/gelation and other directions, can solve the problems of impurities in lithium lanthanum zirconium tantalum oxygen and affect the use of solid electrolytes, and achieve electrical conductivity. The effect of increasing the rate and improving the performance

Inactive Publication Date: 2021-09-07
KUNSHAN BAOTRON NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the above methods all have the problem that there are impurities in the lithium lanthanum zirconium tantalum oxide, which affects the subsequent use as a solid electrolyte

Method used

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  • Lithium lanthanum zirconium tantalum oxide solid electrolyte and preparation method and application thereof
  • Lithium lanthanum zirconium tantalum oxide solid electrolyte and preparation method and application thereof
  • Lithium lanthanum zirconium tantalum oxide solid electrolyte and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0062] In this example, lithium lanthanum zirconium tantalum oxygen solid electrolyte was prepared according to the following method:

[0063] Lithium source (lithium hydroxide), zirconium source (zirconia), lanthanum source (lanthanum oxide), tantalum source (tantalum oxide), sintering aid (alumina) and first solvent (isopropanol) were sand milled and mixed ( The mass ratio of lithium source, lanthanum source, zirconium source, tantalum source and sintering aid is 19.6:32:14.1:7.2:1, and the total mass of lithium source, zirconium source, lanthanum source, tantalum source and sintering aid is the same as described The mass ratio of the first solvent is 0.5:1. After spray drying, sintering is carried out. The sintering temperature is 900°C, and the sintering time is 8h. The obtained sintered product is stirred and dispersed with the second solvent (ethanol) and the ceramic membrane is washed and purified. (the pore diameter of the ceramic membrane tube is 50nm, and the mass ra...

Embodiment 2

[0074] In this example, lithium lanthanum zirconium tantalum oxygen solid electrolyte was prepared according to the following method:

[0075] Lithium source (lithium hydroxide), zirconium source (zirconia), lanthanum source (lanthanum oxide), tantalum source (tantalum oxide), sintering aid (alumina) and first solvent (isopropanol) were sand milled and mixed ( The mass ratio of lithium source, lanthanum source, zirconium source, tantalum source and sintering aid is 20.4:32:14.1:3.6:1, and the total mass of lithium source, zirconium source, lanthanum source, tantalum source and sintering aid is the same as described The mass ratio of the first solvent is (0.2:1), sintering is carried out after spray drying, the sintering temperature is 850°C, and the sintering time is 9h, and the obtained sintered product is stirred and dispersed with the second solvent (N-methylpyrrolidone) Wash and purify the ceramic membrane (the pore diameter of the ceramic membrane tube is 10nm, the mass r...

Embodiment 3

[0085] In this example, lithium lanthanum zirconium tantalum oxygen solid electrolyte was prepared according to the following method:

[0086] Lithium source (lithium hydroxide), zirconium source (zirconia), lanthanum source (lanthanum oxide), tantalum source (tantalum oxide), sintering aid (alumina) and first solvent (isopropanol) were sand milled and mixed ( The mass ratio of lithium source, lanthanum source, zirconium source, tantalum source and sintering aid is 18.9:2:14.1:10.8:1, and the total mass of lithium source, zirconium source, lanthanum source, tantalum source and sintering aid is the same as described The mass ratio of the first solvent is 0.7:1), and sintering is carried out after spray drying, the sintering temperature is 950°C, and the sintering time is 7h, and the obtained sintered product is mixed with the second solvent (isopropanol and N,N-dimethylformamide) was stirred and dispersed and washed and purified by ceramic membrane (the pore size of the ceramic...

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Abstract

The invention provides a lithium lanthanum zirconium tantalum oxide solid electrolyte and a preparation method and application thereof. The method comprises the following steps: mixing a lithium source, a zirconium source, a lanthanum source, a tantalum source, a sintering aid and a first solvent, drying, sintering, mixing the obtained sintered product with a second solvent, and washing a ceramic membrane to obtain the lithium lanthanum zirconium tantalum oxide solid electrolyte. According to the preparation method provided by the invention, the lithium lanthanum zirconium tantalum oxide material prepared in batches is subjected to high purification treatment, the PH value, the alkali content and the content of magnetic elements such as iron can be effectively reduced, chloride ions and sulfate ions can be effectively removed, so that the material can be directly applied to the field of solid-state batteries, meanwhile, the lithium ion conductivity is improved, and the performance of the solid-state battery is improved.

Description

technical field [0001] The invention belongs to the technical field of batteries, and relates to a lithium-lanthanum-zirconium-tantalum-oxygen solid electrolyte and a preparation method and application thereof. Background technique [0002] The large-scale use of traditional fuel vehicles is considered to be one of the reasons for the gradual depletion of oil resources and the increasing greenhouse effect. In response to the above problems, domestic and foreign automakers and institutions are gradually adopting electric vehicles to replace traditional fuel vehicles. Liquid lithium-ion batteries are adopted by automobile manufacturers as the main power source for battery vehicles due to their high energy density and long cycle life. With the increasing development of the electric vehicle industry, the current liquid lithium-ion batteries are gradually unable to meet the requirements, such as mileage requirements and safety requirements. At present, electric vehicles equippe...

Claims

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Application Information

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IPC IPC(8): H01M10/0562C01G35/00H01M4/13H01M4/139H01M10/0525
CPCH01M10/0525H01M10/0562H01M4/13H01M4/139C01G35/006H01M2300/0071H01M2300/0085C01P2006/80Y02E60/10
Inventor 熊伟强谢普李艳红石兴菊尚旭梁世硕
Owner KUNSHAN BAOTRON NEW ENERGY TECH CO LTD
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