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Oxide solid electrolyte material, and preparation method and application thereof

A technology of solid electrolytes and oxides, applied in circuits, electrical components, secondary batteries, etc., can solve the problems of few sources and high prices, and achieve the effects of low prices, wide sources, and high room temperature ionic conductivity

Active Publication Date: 2013-05-22
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the doping elements reported so far have shortcomings such as few sources and high prices.

Method used

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  • Oxide solid electrolyte material, and preparation method and application thereof
  • Oxide solid electrolyte material, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Example 1. Preparation of calcium-doped lithium-lanthanum-zirconium-based solid electrolyte material

[0027] Lithium source compound lithium carbonate 7.315 g, lanthanum source compound lanthanum oxide 11.404 g, zirconium source compound zirconia 6.161 g and calcium source compound calcium carbonate 0.5 g according to Li, La, Zr, Ca molar ratio is 7.92: 2.80: 2: 0.20 , the doping element accounts for 0.95% of the matrix material, ball milled in ethanol medium for 10 hours, then dried at 60°C, calcined at 900°C for 15 hours, ball milled in isopropanol for 12 hours, and dried at 75°C After 6 hours, pre-press molding under the pressure of 4MPa for 1 minute, then cold isostatic pressing under the pressure of 200MPa for 5 minutes, and sinter the green body after molding at 1200°C for 24 hours to obtain the calcium element provided by the present invention Doped lithium lanthanum zirconium oxide solid electrolyte material.

[0028]The lithium-lanthanum-zirconium-based solid...

Embodiment 2

[0029] Example 2, preparation of lithium lanthanum zirconium oxide solid electrolyte material doped with strontium element

[0030] 7.315 grams of the lithium source compound lithium carbonate, 11.404 grams of the lanthanum source compound lanthanum oxide, 6.161 grams of the zirconium source compound zirconia and 0.738 grams of the strontium source compound strontium carbonate according to the molar ratio of Li, La, Zr, and Sr are 7.92:2.80:2:0.20 , the doping element accounted for 2.2% of the matrix material, ball milled in ethanol medium for 10 hours, then dried at 60°C, calcined at 900°C for 15 hours, ball milled in isopropanol for 12 hours, and dried at 75°C After 8 hours, pre-press molding under a pressure of 4MPa for 5 minutes, then cold isostatic pressing under a pressure of 200MPa for 5 minutes, and sinter the green body after molding at 1200°C for 24 hours to obtain the strontium element provided by the present invention Doped lithium lanthanum zirconium oxide solid e...

Embodiment 3

[0034] Example 3, preparation of lithium lanthanum zirconium oxide solid electrolyte material doped with barium element

[0035] Lithium source compound lithium carbonate 7.315 grams, lanthanum source compound lanthanum oxide 11.404 grams, zirconium source compound zirconia 6.161 grams and calcium source compound barium carbonate 0.987 grams according to Li, La, Zr, Ba molar ratio is 7.92: 2.80: 2: 0.20 , the dopant element accounted for 3.27% of the matrix material, ball milled and mixed in ethanol medium for 10 hours, then dried at 60°C, calcined at 900°C for 15 hours, and then ball milled in isopropanol medium for 12 hours, at 75°C After drying for 8 hours, pre-press molding under a pressure of 4MPa for 10 minutes, then cold isostatic pressing under a pressure of 200MPa for 5 minutes, and sinter the green body after molding at 1200°C for 24 hours to obtain the barium Element doped lithium lanthanum zirconium oxide solid electrolyte material.

[0036] The lithium-lanthanum-...

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Abstract

The invention discloses a lithium-lanthanum-zirconium-oxygen-base oxide solid electrolyte material and a preparation method thereof. The solid electrolyte material is composed of a base material and a doping element, wherein the base material is a lithium-lanthanum-zirconium-oxygen solid electrolyte of which the chemical formula is Li7La3Zr2O12, the doping element is selected from at least one of calcium, strontium, barium and germanium, and the weight of the doping element does not exceed 15% of that of the base material. The preparation method comprises the following steps: a lithium source compound, a lanthanum source compound, a zirconium source compound and a doping element compound are evenly mixed, calcined and sintered to obtain the lithium-lanthanum-zirconium-oxygen-base oxide solid electrolyte material. The lithium-lanthanum-zirconium-oxygen-base oxide solid electrolyte material can be prepared under the conditions of wide sources of doping element, lower sintering temperature and shorter sintering time, and the total room-temperature ionic conductivity is greater than 1*10<-4>S / cm; and thus, the material has important application value.

Description

technical field [0001] The invention relates to an oxide solid electrolyte material and a preparation method and application thereof. Background technique [0002] Since its commercialization in the early 1990s, lithium-ion batteries have gradually occupied a growing market in the fields of consumer electronics, such as mobile phones, notebook computers, and digital cameras, due to their high energy density and power density. large market share. With the continuous prosperity of the national economy and the continuous improvement of modern technology, lithium-ion batteries have greatly expanded their application fields in today's society. For example, electric vehicles have emerged in recent years to reduce carbon dioxide emissions, and thin-film batteries have been produced with the miniaturization and integration of electronic devices. The improvement and perfection of lithium-ion battery technology has expanded its application fields. At the same time, new conditions of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562
CPCY02E60/12Y02E60/10
Inventor 南策文黄冕亚历山大沈洋林元华刘振国裴佳宁
Owner TSINGHUA UNIV
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