A kind of oxide solid electrolyte material and its preparation method and application

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

Active Publication Date: 2015-09-30
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of oxide solid electrolyte material and its preparation method and application
  • A kind of oxide solid electrolyte material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0027] The lithium source compound lithium carbonate 7.315 g, the lanthanum source compound lanthanum oxide 11.404 g, the zirconium source compound zirconium oxide 6.161 g, and the calcium source compound calcium carbonate 0.5 g according to the molar ratio of Li, La, Zr, and Ca are 7.92: 2.80: 2: 0.20 , Doping elements accounted for 0.95% 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, then ball milled in isopropanol medium for 12 hours, and dried at 75°C After 6 hours, pre-compression molding was carried out at a pressure of 4 MPa for 1 minute, and then cold isostatically pressed at a pressure of 200 MPa for 5 minutes, and the formed body was sintered at 1200°C for 24 hours to obtain the calcium element provided by the present invention Doped with lithium lanthanum zirconium-based solid el...

Embodiment 2

[0029] Example 2. Preparation of strontium-doped lithium lanthanum zirconium-based solid electrolyte material

[0030] The lithium source compound lithium carbonate 7.315 g, the lanthanum source compound lanthanum oxide 11.404 g, the zirconium source compound zirconium oxide 6.161 g, and the strontium source compound strontium carbonate 0.738 g according to the molar ratio of Li, La, Zr, Sr are 7.92: 2.80: 2: 0.20 , Doping elements accounted for 2.2% 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, then ball-milled in isopropanol medium for 12 hours, and dried at 75°C After 8 hours, pre-compression molding was carried out at a pressure of 4 MPa for 5 minutes, and then cold isostatically pressed at a pressure of 200 MPa for 5 minutes, and the formed body was sintered at 1200°C for 24 hours to obtain the strontium element provided by the present invention Doped lithium lanthanum zirconium-based solid e...

Embodiment 3

[0034] Example 3 Preparation of barium-doped lithium lanthanum zirconium-based solid electrolyte material

[0035] The lithium source compound lithium carbonate 7.315 g, the lanthanum source compound lanthanum oxide 11.404 g, the zirconium source compound zirconium oxide 6.161 g, and the calcium source compound barium carbonate 0.987 g according to the molar ratio of Li, La, Zr, and Ba are 7.92: 2.80: 2: 0.20 , Doping elements accounted for 3.27% of the matrix material, ball milling and mixing in ethanol medium for 10 hours, then dried at 60 ℃, calcined at 900 ℃ for 15 hours, and then ball milled in isopropanol medium for 12 hours at 75 ℃ After drying for 8 hours, pre-compacting for 10 minutes at a pressure of 4 MPa, and then cold isostatically pressing at a pressure of 200 MPa for 5 minutes, the formed body is sintered at 1200°C for 24 hours to obtain the barium provided by the present invention Element-doped lithium lanthanum zirconium-based solid electrolyte material.

[0036] ...

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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 commercialization in the early 1990s, lithium-ion batteries have gradually occupied more and more areas in consumer electronics products, such as mobile phones, notebook computers, and digital cameras due to their higher 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 areas in today's society. Such as electric vehicles that have emerged in recent years to reduce carbon dioxide emissions, and thin-film batteries that 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, the new conditions of u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0562
CPCY02E60/10
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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