CN110451781B - Chlorine-doped molybdenum phosphate glass with high ionic conductivity and preparation method thereof - Google Patents

Chlorine-doped molybdenum phosphate glass with high ionic conductivity and preparation method thereof Download PDF

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CN110451781B
CN110451781B CN201910586447.4A CN201910586447A CN110451781B CN 110451781 B CN110451781 B CN 110451781B CN 201910586447 A CN201910586447 A CN 201910586447A CN 110451781 B CN110451781 B CN 110451781B
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张宗辉
任进军
胡丽丽
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Shanghai Institute of Optics and Fine Mechanics of CAS
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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B19/00—Other methods of shaping glass
    • C03B19/02—Other methods of shaping glass by casting molten glass, e.g. injection moulding
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/12—Silica-free oxide glass compositions
    • C03C3/23—Silica-free oxide glass compositions containing halogen and at least one oxide, e.g. oxide of boron
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/582—Halogenides
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Abstract

A transparent chlorine-doped molybdenum phosphate glass with high ionic conductivity and a preparation method thereof, the chlorine-doped molybdenum phosphate glass comprises the following molar components: 14.81 to 19.05 mol% LiCl, 29.63 to 38.10 mol% Li2O, 9.52-51.85 mol% MoO3And 3.70 to 33.33 mol% of P2O5. The invention adopts a platinum crucible, and raw material medicines are melted in a high-temperature furnace and cast on a cast iron mould to prepare the chlorine-doped molybdenum phosphate glass. By adjusting MoO3The content of the lead-acid salt in the series of chlorine-doped molybdenum phosphate glass electrolytes improves the ionic conductivity of the series of chlorine-doped molybdenum phosphate glass electrolytes by about 250 times at normal temperature, and reaches 10‑5S/cm level and obviously improved chemical stability. The invention has good visible light transmission and high ionic conductivity, and can be easily drawn into optical fibers. Has an extreme in all-solid-state lithium batteries, optogenetics and electrophysiologyHas wide application prospect.

Description

Chlorine-doped molybdenum phosphate glass with high ionic conductivity and preparation method thereof
Technical Field
The invention relates to phosphate glass capable of being used for all-solid-state lithium ion batteries and conductive optical fibers, in particular to chlorine-doped molybdenum phosphate glass with high ionic conductivity and transparent visible light and a preparation method thereof.
Background
Currently, phosphate glass is widely used in various fields, such as fast ion conductor glass, high-energy laser glass, bioglass and the like, due to flexible component ratio, good glass forming performance and the like. The ionic conductivity, chemical stability, mechanical property and the like of the phosphate glass can be greatly regulated and controlled by introducing different modifier cations into the phosphate glass. Especially, with the development of pure electric vehicles and wearable electronic devices in recent years, the lithium ion battery of the traditional liquid electrolyte far cannot meet the harsh requirements of high electric quantity density, large current, safety and reliability, and the novel all-solid-state lithium battery becomes a breakthrough of the next battery technology. The fast ion conductor glass has higher normal temperature ion conductivity and is an ideal material of solid electrolyte in the all-solid-state lithium battery. Meanwhile, the phosphate glass with high ionic conductivity also has good light transmittance in a visible light region, so that the phosphate glass can be used for gene activation and synchronous detection in optogenetics, and the application fields of electrophysiology and the like.
In general, the incorporation of halides into phosphate glasses tends to increase the ionic conductivity of the glass, but also reduces the chemical stability of the phosphate glass. And the chemical stability of the phosphate glass can be improved by introducing the transition metal element. The transition metal elements generally have larger ionic radii and can extend the phosphate glass network so that Li+Increase of ion transport channel and reduction of Li+Ion activation energy, and thus ion conductivity can be improved. The invention provides a chlorine-doped molybdenum phosphate glass and a preparation method thereof.
In known patent publication CN109906374A, water picrashiki et al proposed the use of various sulfide glasses as electrolyte materials of solid-state batteries, due to the higher ionic conductivity of sulfide glasses relative to oxide glasses. However, sulfide glass has poor chemical stability, is easy to oxidize or absorb water and denature in air, and sulfide has certain biological toxicity. Therefore, oxide glasses are more suitable for a wide range of applications. Generally, there are few oxide glasses with high ionic conductivity, and at the same time, oxide glasses with high ionic conductivity, good chemical stability and transparency are more difficult to prepare, and similar reports are not found in related patents at present.
The invention comprises a high ionic conductivity and transparent chlorine-doped molybdenum phosphate glass and a preparation method thereof. By using MoO3Replacing part of P in the glass2O5To improve the chemical stability of the phosphate glass, and simultaneously increase the glass network structure and enlarge Li+And the ion transport channel is used for reducing the activation energy of ions and improving the ionic conductivity, so that the chlorine-doped phosphate glass can be used in a high-performance all-solid-state lithium ion battery. Meanwhile, the chlorine-doped molybdenum phosphate glass has good light transmittance in a visible light region, has excellent light conductivity and electrical conductivity after being drawn into an optical fiber, and greatly expands the application prospect in the aspects of optogenetics and electrophysiology.
Disclosure of Invention
The invention aims to provide transparent chlorine-doped molybdenum phosphate glass with high ionic conductivity and a preparation method thereof.
The technical scheme of the invention is as follows:
the composition characteristics of a transparent chlorine-doped molybdophosphoric acid glass with high ionic conductivity are described as follows:
Figure BDA0002114593710000021
the invention also provides a preparation method of the chlorine-doped molybdenum phosphate glass, which comprises the following steps:
according to the composition and mole percentage of the above-mentioned chlorine-doped molybdenum phosphate glass, using anhydrous LiCl and Li2CO3、LiPO3And MoO3Is used as a raw material for preparing the high-purity,calculating the mass of each raw material and weighing the corresponding raw materials;
secondly, placing the weighed raw materials in an agate mortar for fully grinding to form mixed powder;
thirdly, placing the powder prepared in the second step into a platinum crucible, and melting the powder in a high-temperature furnace at 700-900 ℃ for 10-60 minutes. In the melting process, a platinum crucible is required to be covered, so that the volatilization of raw materials is reduced;
fourthly, pouring the molten and clarified glass liquid on a preheated iron mold, and rapidly pressing the glass melt by using another preheated iron mold to obtain a transparent and uniform glass sheet;
fifthly, quickly transferring the obtained glass sheet to a muffle furnace for annealing treatment, wherein the annealing temperature is about glass transition temperature (T)g) And after the temperature is kept for 3-24 hours, cooling to room temperature at a cooling rate of 0.1-10 ℃/h, and then taking out the glass.
The invention has the technical effects that:
due to MoO3To gradually replace P in the glass2O5The chemical stability of the chlorine-doped molybdenum phosphate glass is improved, the glass network structure is enlarged, and Li is enlarged+The ion transport channel reduces the ion activation energy and improves the ion conductivity, so that the chlorine-doped molybdenum phosphate glass prepared by the method has high ion conductivity, good chemical stability and transparency, and can be used in the fields of high-performance all-solid-state lithium ion batteries, optogenetics, electrophysiology and the like.
Drawings
FIG. 1 is an AC complex impedance spectrum of samples of example 1#, example 2# and example 3# in accordance with the present invention at room temperature, wherein the insets are the room temperature ionic conductivity vs. MoO of the samples in each example3The variation trend of the content is shown.
Detailed Description
The components of 3 specific examples of the transparent chlorine-doped molybdenum phosphate glass with high ionic conductivity according to the invention are as follows:
table 1: glass formula of specific 7 implementation cases
Figure BDA0002114593710000031
Example 1 #:
the raw materials are shown in table 1, and the specific preparation process is as follows:
raw materials (total 5g) were weighed:
Figure BDA0002114593710000032
the weighed raw materials are placed in an agate mortar to be fully ground to form mixed powder, and the mixed powder is placed in a platinum crucible and melted in a high-temperature furnace at 800 ℃. In the melting process, a platinum crucible is covered with a cover, so that the volatilization of raw materials is reduced. And pouring the molten and clarified glass liquid on a preheated iron mold, and quickly pressing the glass melt by using another preheated iron plate to obtain transparent and uniform glass sheets. And quickly transferring the obtained glass sheet to a muffle furnace for annealing treatment, wherein the annealing temperature is 320 ℃, keeping the temperature for 3 hours, then cooling to room temperature at the cooling rate of 0.5 ℃/h, and then taking out the glass finished product. The measured value of the ionic conductivity of the glass sample prepared in this example at room temperature was 4.2X 10-8S/cm。
Example 2 #:
the raw materials are shown in table 1, and the specific preparation process is as follows:
raw materials (total 5g) were weighed:
Figure BDA0002114593710000041
the weighed raw materials are placed in an agate mortar to be fully ground to form mixed powder, and the mixed powder is placed in a platinum crucible and melted in a high-temperature furnace at 800 ℃. In the melting process, a platinum crucible is covered with a cover, so that the volatilization of raw materials is reduced. Pouring the molten and clarified glass liquid on a preheated iron mould, and quickly pressing the glass melt by using another preheated iron plate to obtain the glassTo a transparent and homogeneous glass sheet. And (3) rapidly transferring the obtained glass sheet to a muffle furnace for annealing treatment, wherein the annealing temperature is 340 ℃, keeping the temperature for 3 hours, then cooling to room temperature at the cooling rate of 0.5 ℃/h, and then taking out the glass finished product. The measured value of the ionic conductivity of the glass sample prepared in this example at room temperature was 3.5X 10-7S/cm。
Example 3 #:
the raw materials are shown in table 1, and the specific preparation process is as follows:
raw materials (total 5g) were weighed:
Figure BDA0002114593710000042
the weighed raw materials are placed in an agate mortar to be fully ground to form mixed powder, and the mixed powder is placed in a platinum crucible and melted in a high-temperature furnace at 800 ℃. In the melting process, a platinum crucible is covered with a cover, so that the volatilization of raw materials is reduced. And pouring the molten and clarified glass liquid on a preheated iron mold, and quickly pressing the glass melt by using another preheated iron plate to obtain transparent and uniform glass sheets. And (3) quickly transferring the obtained glass sheet to a muffle furnace for annealing treatment, wherein the annealing temperature is 235 ℃, keeping the temperature for 3 hours, then cooling to room temperature at the cooling rate of 0.5 ℃/h, and then taking out the glass finished product. The measured value of the ionic conductivity of the glass sample prepared in this example at room temperature was 1.1X 10-5S/cm。
Example 4 #:
the raw materials are shown in table 1, and the specific preparation process is as follows:
raw materials (total 5g) were weighed:
Figure BDA0002114593710000043
the weighed raw materials are placed in an agate mortar to be fully ground to form mixed powder, and the mixed powder is placed in a platinum crucible and melted in a high-temperature furnace at 800 ℃. In the melting process, a platinum crucible is covered with a cover, so that the volatilization of raw materials is reduced. After melting and clarifyingThe molten glass is poured on a preheated iron mold, and another preheated iron plate is rapidly used for pressing glass melt to obtain transparent and uniform glass sheets. And (3) rapidly transferring the obtained glass sheet to a muffle furnace for annealing treatment, wherein the annealing temperature is 350 ℃, keeping the temperature for 3 hours, then cooling to room temperature at the cooling rate of 0.5 ℃/h, and then taking out the glass finished product. The measured value of the ionic conductivity of the glass sample prepared in this example at room temperature was 9.1X 10-8S/cm。
Example 5 #:
the raw materials are shown in table 1, and the specific preparation process is as follows:
raw materials (total 5g) were weighed:
Figure BDA0002114593710000051
the weighed raw materials are placed in an agate mortar to be fully ground to form mixed powder, and the mixed powder is placed in a platinum crucible and melted in a high-temperature furnace at 800 ℃. In the melting process, a platinum crucible is covered with a cover, so that the volatilization of raw materials is reduced. And pouring the molten and clarified glass liquid on a preheated iron mold, and quickly pressing the glass melt by using another preheated iron plate to obtain transparent and uniform glass sheets. And (3) rapidly transferring the obtained glass sheet to a muffle furnace for annealing treatment, wherein the annealing temperature is 325 ℃, keeping the temperature for 3 hours, then cooling to room temperature at the cooling rate of 0.5 ℃/h, and then taking out the glass finished product. The measured value of the ionic conductivity of the glass sample prepared in this example at room temperature was 6.1X 10-7S/cm。
Example 6 #:
the raw materials are shown in table 1, and the specific preparation process is as follows:
raw materials (total 5g) were weighed:
Figure BDA0002114593710000052
the weighed raw materials are put into an agate mortar for full grinding to form mixed powder, the powder is put into a platinum crucible,melting at 800 deg.C in high temperature furnace. In the melting process, a platinum crucible is covered with a cover, so that the volatilization of raw materials is reduced. And pouring the molten and clarified glass liquid on a preheated iron mold, and quickly pressing the glass melt by using another preheated iron plate to obtain transparent and uniform glass sheets. And (3) rapidly transferring the obtained glass sheet to a muffle furnace for annealing treatment, wherein the annealing temperature is 285 ℃, keeping the temperature for 3 hours, then cooling to room temperature at the cooling rate of 0.5 ℃/h, and then taking out the glass finished product. The measured value of the ionic conductivity of the glass sample prepared in this example at room temperature was 5.7X 10-7S/cm。
Example 7 #:
the raw materials are shown in table 1, and the specific preparation process is as follows:
raw materials (total 5g) were weighed:
Figure BDA0002114593710000053
Figure BDA0002114593710000061
the weighed raw materials are placed in an agate mortar to be fully ground to form mixed powder, and the mixed powder is placed in a platinum crucible and melted in a high-temperature furnace at 800 ℃. In the melting process, a platinum crucible is covered with a cover, so that the volatilization of raw materials is reduced. And pouring the molten and clarified glass liquid on a preheated iron mold, and quickly pressing the glass melt by using another preheated iron plate to obtain transparent and uniform glass sheets. And (3) quickly transferring the obtained glass sheet to a muffle furnace for annealing treatment, wherein the annealing temperature is 260 ℃, keeping the temperature for 3 hours, then cooling to room temperature at the cooling rate of 0.5 ℃/h, and then taking out the glass finished product. The measured value of the ionic conductivity of the glass sample prepared in this example at room temperature was 1.1X 10-6S/cm。
Experiments have shown that by using MoO3To replace part of P in the glass2O5Can improve the chemical stability of the phosphate glass, increase the glass network structure and enlarge Li+Ion transport channel to reduce ion activation energy and increase ion conductivity, the highest normal temperature conductivity appeared in example 3# and reached 10-5The S/cm grade enables the chlorine-doped molybdenum phosphate glass to be used in high-performance all-solid-state lithium ion batteries. Meanwhile, the chlorine-doped molybdenum phosphate glass has good light transmittance in a visible light region, has excellent light guide and electrical conductivity after being drawn into an optical fiber, and greatly expands the application prospect in the aspects of optogenetics and electrophysiology.

Claims (2)

1. The chlorine-doped molybdenum phosphate glass with high ionic conductivity is characterized by comprising the following components in percentage by mole:
Figure FDA0003500067550000011
the preparation method comprises the following steps:
calculating and weighing the mass required by each raw material according to the composition and the mol percentage of the chlorine-doped molybdenum phosphate glass;
secondly, placing the weighed raw materials in an agate mortar for fully grinding to form mixed powder;
thirdly, placing the powder prepared in the second step into a platinum crucible, and melting the powder in a high-temperature furnace at 700-900 ℃ for 10-60 minutes; in the melting process, a platinum crucible is required to be covered to reduce the volatilization of raw materials;
pouring the molten and clarified glass liquid on a preheated iron mold, and pressing the glass melt by using another preheated iron mold to obtain a transparent and uniform glass sheet;
fifthly, transferring the obtained glass sheet to a muffle furnace for annealing treatment, wherein the annealing temperature is glass transition temperature (T)g) And after the temperature is kept for 3-24 hours, cooling to room temperature at a cooling rate of 0.1-10 ℃/h, and then taking out the glass.
2. According to claim 1The chlorine-doped molybdenum phosphate glass with high ionic conductivity is characterized in that the raw materials of the components of the chlorine-doped molybdenum phosphate glass are respectively anhydrous LiCl and Li2CO3、LiPO3And MoO3。
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102696141A (en) * 2009-12-16 2012-09-26 丰田自动车株式会社 Method of producing a sulfide solid electrolyte material, sulfide solid electrolyte material, and lithium battery

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US7390591B2 (en) * 2002-10-15 2008-06-24 Polyplus Battery Company Ionically conductive membranes for protection of active metal anodes and battery cells

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CN102696141A (en) * 2009-12-16 2012-09-26 丰田自动车株式会社 Method of producing a sulfide solid electrolyte material, sulfide solid electrolyte material, and lithium battery

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Electronic and ionic conductivity of glasses inside the;Bih, L;《Solid State Ionics》;20000731;第132卷(第1-2期);全文 *
Enhanced ionic conductivity of the solid electrolyte for lithium-ion batteries;Tron, Artur;《Journal of Solid State Chemistry》;20180228;第258卷;全文 *
Investigations of molybdenum redox phenomenon in Li2O-MoO3-P2O5 phosphate glasses;Bih, L.;《Journal of Molecular Structure》;20080115;第872卷(第1期);全文 *
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