Chalcogenide microcrystalline glass material with function of lithium ion conductor and preparation method thereof

A technology of glass-ceramic and ion conductor, applied in the field of chalcogenide glass-ceramic and its preparation, can solve unseen problems, achieve high lithium ion conductivity, improve atmospheric erosion resistance and thermodynamic performance, and improve atmospheric erosion resistance effect of ability

Inactive Publication Date: 2010-08-25
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no product of chalcogenide glass-ceramics with the function...

Method used

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  • Chalcogenide microcrystalline glass material with function of lithium ion conductor and preparation method thereof
  • Chalcogenide microcrystalline glass material with function of lithium ion conductor and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0024] A chalcogenide glass-ceramic material with the function of lithium ion conductor, its molar composition is expressed as: 56GeS 2 24Ga 2 S 3 · 20LiI.

[0025] The specific preparation method is as follows:

[0026] 1). Select raw materials: according to 56GeS 2 24Ga 2 S 3 20LiI selects elemental Ge, Ga, S and compound LiI raw materials, the purity of elemental Ge, Ga, S and compound LiI are respectively ≥ 99.999%, and it is used for later use;

[0027] 2).In an environment full of inert gas, mix Ge, Ga, S and compound LiI raw materials, after grinding and mixing to make batches, put them in a container and vacuumize, the vacuum degree is 10 -3 ~10 -6 Pa, then seal the container and place it in a heating device;

[0028] 3). Preparation of the basic glass: heat the container containing the batch material in step 2), first slowly raise the temperature to 595°C-605°C at a rate of less than 3°C / min, and keep it at this temperature for 3-5 hours, Then heat up to 900-...

Embodiment 2

[0036] A chalcogenide glass-ceramic material with the function of lithium ion conductor, its molar composition is expressed as: 65GeS 2 25Ga 2 S 3 · 10LiI.

[0037] The specific preparation method is as follows:

[0038] 1). Select raw materials: according to 65GeS 2 25Ga 2 S 3 10LiI, select elemental Ge, Ga, S and compound LiI raw materials, the purity of elemental Ge, Ga, S and compound LiI are respectively ≥ 99.999% (mass), and set aside;

[0039] 2). Carry out according to embodiment 1 of 2).

[0040] 3). Carry out according to embodiment 1 of 3).

[0041] 4). Carry out according to embodiment 1 of 4).

[0042] 65 GeS 2 25Ga 2 S 3 Determination of the glass transition temperature of 10LiI base glass: Obtain the differential thermal curve at a heating rate of 10°C / min through a differential calorimeter, and then find out the start temperature of the glass transition of 402°C and the end temperature of 418°C by extrapolating the tangent method , and the midpoint ...

Embodiment 3

[0048] A chalcogenide glass-ceramic material with the function of lithium ion conductor, its molar composition is expressed as: 65GeS 2 20Ga 2 S 3 · 15LiI.

[0049] The specific preparation method is as follows:

[0050] 1). Select raw materials: according to 65GeS 2 20Ga 2 S 3 15LiI, select elemental Ge, Ga, S and compound LiI raw materials, the purity of elemental Ge, Ga, S and compound LiI are respectively ≥ 99.999% (mass), and set aside;

[0051] 3). Carry out according to embodiment 1 of 3).

[0052] 4). Carry out according to embodiment 1 of 4).

[0053] 65 GeS 2 20Ga 2 S 3 Determination of the glass transition temperature of 15LiI base glass: Obtain the differential thermal curve at a heating rate of 10°C / min through a differential calorimeter, and then use the extrapolation tangent method to find the glass transition start temperature of 371°C and end temperature of 389°C , and take the midpoint temperature of 380°C between the start temperature and the end ...

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Abstract

The invention provides a chalcogenide microcrystalline glass material with the function of an ion conductor, which is characterized in that the molar composition of the material has the chemical formula of (100-x-y) GeS2. xGa2S3. yLiI, wherein x=20-25, and y=10-20. A preparation method of the chalcogenide microcrystalline glass material comprises the steps of: first, preparing chalcogenide glass by using a melt quenching method, and obtaining the chalcogenide microcrystalline glass with the function of the ion conductor by precise heat treatment and controllable micritization of base glass. Compared with base chalcogenide glass, the chalcogenide microcrystalline glass with the solid electrolyte function of the ion conductor obviously improves the conductivity, and improves the atmospheric corrosion resistance and thermodynamic stability.

Description

technical field [0001] The invention relates to a chalcogenide glass-ceramic with the function of a lithium ion conductor and a preparation process thereof, belonging to the field of functional glass ceramic materials. Background technique [0002] Compared with polymer organic lithium ion conductor materials, inorganic lithium ion conductor materials are widely used in electrochromic devices, electrochemical sensors, etc. All fields have broad application prospects. [0003] Among the inorganic lithium ion conductor glass materials, the ionic conductivity of oxide glass is generally low at low temperature and room temperature, and it is difficult to meet the requirements for use at low temperature and room temperature. Chalcogen elements have higher polarizability than oxygen elements, so compared with oxide glasses of corresponding composition, chalcogenide glasses have much higher electrical conductivity, and are one of the candidate materials for use at low temperature ...

Claims

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Application Information

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IPC IPC(8): C03C10/16
Inventor 陶海征林常规黄赛赵修建
Owner WUHAN UNIV OF TECH
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