Lithium lanthanum zirconium oxide solid electrolyte material and its preparation method and application

A solid electrolyte, lithium lanthanum zirconium oxide technology, applied in circuits, electrical components, secondary batteries, etc., can solve problems such as waste of lithium raw materials, achieve the effects of saving consumption, reducing production costs, and high room temperature ionic conductivity

Inactive Publication Date: 2011-12-14
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this content has a certain degree of experience and blindness, and it also causes a large waste of lithium raw materials

Method used

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  • Lithium lanthanum zirconium oxide solid electrolyte material and its preparation method and application
  • Lithium lanthanum zirconium oxide solid electrolyte material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1, preparation Li 7+x La 3 Zr 2 o 12+0.5x (x=-0.35) lithium lanthanum zirconium oxygen solid electrolyte material

[0024] 6.976 grams of the lithium source compound lithium hydroxide, 12.217 grams of the lanthanum source compound lanthanum oxide, and 6.161 grams of the zirconium source compound zirconia were ball-milled and mixed in an isopropanol medium according to the molar ratio of Li, La and Zr of 6.65:3:2 for 18 hours, then dried at 75°C, calcined at 800°C for 15 hours, ball milled in isopropanol medium for 24 hours, dried at 80°C, pre-pressed at 4MPa, and then cooled at 200MPa After isostatic pressing for 5 minutes, the green body after molding was sintered at 1200 ° C for 35 hours to obtain the Li 7+x La 3Zr 2 o 12+0.5x (x=-0.35) lithium lanthanum zirconium oxygen solid electrolyte material.

[0025] The lithium lanthanum zirconium oxygen solid electrolyte material has a total resistance of 27574 ohms, a thickness of 1.71 mm, a diameter of 11...

Embodiment 2

[0026] Embodiment 2, preparation Li 7+x La 3 Zr 2 o 12+0.5x (x=0) Lithium Lanthanum Zirconium Oxygen Solid Electrolyte Material

[0027] 7.343 grams of the lithium source compound lithium hydroxide, 12.217 grams of the lanthanum source compound lanthanum oxide and 6.161 grams of the zirconium source compound zirconia were ball milled and mixed in an isopropanol medium according to the molar ratio of Li, La and Zr of 7:3:2 for 18 hours, then dried at 75°C, calcined at 800°C for 15 hours, ball milled in isopropanol medium for 24 hours, dried at 80°C, pre-pressed at 4MPa, and then cooled at 200MPa After isostatic pressing for 5 minutes, the green body after molding was sintered at 1200 ° C for 35 hours to obtain the Li 7+x La 3 Zr 2 o 12+0.5x (x=0) lithium lanthanum zirconium oxygen solid electrolyte material.

[0028] The lithium lanthanum zirconium oxygen solid electrolyte material has a total resistance of 523 ohms, a thickness of 0.93 mm, a diameter of 10.85 mm, and a...

Embodiment 3

[0031] Embodiment 3, preparation Li 7+x La 3 Zr 2 o 12+0.5x (x=0.35) lithium lanthanum zirconium oxygen solid electrolyte material

[0032] 7.710 grams of the lithium source compound lithium hydroxide, 12.217 grams of the lanthanum source compound lanthanum oxide, and 6.161 grams of the zirconium source compound zirconia were ball milled and mixed in an isopropanol medium according to the molar ratio of Li, La and Zr of 7.35:3:2 for 18 hours, then dried at 75°C, calcined at 800°C for 15 hours, ball milled in isopropanol medium for 24 hours, dried at 80°C, pre-pressed at 4MPa, and then cooled at 200MPa After isostatic pressing for 5 minutes, the green body after molding was sintered at 1200 ° C for 35 hours to obtain the Li 7+x La 3 Zr 2 o 12+0.5x (x=0) lithium lanthanum zirconium oxygen solid electrolyte material.

[0033] The lithium lanthanum zirconium oxygen solid electrolyte material has a total resistance of 911 ohms, a thickness of 1.23 mm, a diameter of 11.17 mm...

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Abstract

The invention discloses a lithium lanthanum zirconium oxygen solid electrolyte material. The molecular formula of the material is shown as Li7+xLa3Zr2O12+0.5x, wherein -0.35≤x≤+0.35. The structure of the lithium lanthanum zirconium oxygen solid electrolyte material is a cubic garnet structure; the total ion conductivity of the lithium lanthanum zirconium oxygen solid electrolyte material at room temperature is greater than 1×10-4 S / cm. The method comprises the steps of: mixing the lithium source compound, the lanthanum source compound and the zirconium source compound according to the molar ratio of Li, La and Zr (7+x):3:2, and then calcining and sintering to obtain the lithium Lanthanum zirconium oxide solid electrolyte material; wherein, -0.35≤x≤+0.35. This material can prepare lithium lanthanum zirconium oxide solid electrolyte material at lower lithium content and lower sintering temperature, and the total room temperature ion conductivity can be greater than 1×10-4S / cm, which has important applications value.

Description

technical field [0001] The invention belongs to the field of lithium-ion batteries, and relates to a lithium-lanthanum-zirconium-oxygen 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 tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/0525
CPCY02E60/122Y02E60/12Y02E60/10
Inventor 南策文黄冕刘亭邓玉峰
Owner TSINGHUA UNIV
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