CN112002937A - Gel electrolyte for aluminum ion battery and preparation method and application thereof - Google Patents

Gel electrolyte for aluminum ion battery and preparation method and application thereof Download PDF

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CN112002937A
CN112002937A CN202010787818.8A CN202010787818A CN112002937A CN 112002937 A CN112002937 A CN 112002937A CN 202010787818 A CN202010787818 A CN 202010787818A CN 112002937 A CN112002937 A CN 112002937A
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aluminum
ion battery
gel electrolyte
polyamide
aluminum ion
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杜惠平
刘治东
林孟昌
杜丽
吕子川
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Shandong University of Science and Technology
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Shandong University of Science and Technology
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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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/054—Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00—Electrolytes
    • H01M2300/0085—Immobilising or gelification of electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00—Electrolytes
    • H01M2300/0088—Composites
    • H01M2300/0091—Composites in the form of mixtures
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
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  • Secondary Cells (AREA)
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Abstract

The invention provides a gel electrolyte for preparing an aluminum ion battery, which comprises the step of adding polyamide into prepared AlCl according to a certain mass ratio3Heating and stirring the base ionic liquid at a certain temperature for a period of time to obtain a gel-type substance, namely the prepared ionic liquid gel. The ionic liquid is prepared from AlCl3And component A. The invention also discloses application of the gel electrolyte in preparation of an aluminum ion battery. The gel has the characteristics of high conductivity, low fluidity, reversible deposition of aluminum and the like, and can be used as an aluminum ion battery electrolyte.

Description

Gel electrolyte for aluminum ion battery and preparation method and application thereof
Technical Field
The invention relates to the technical field of batteries, in particular to a gel electrolyte for an aluminum ion battery and a preparation method and application thereof.
Background
Lithium ion batteries have limited their development due to the scarcity of lithium resources and the flammability of organic electrolytes. Aluminum is the metal element with the largest content in the earth crust, the mining and production cost is low, and the process is mature. In addition, one aluminum ion can transfer three electrons, the theoretical specific capacity is 2980mAh/g, which is second to lithium (3870mAh/g), and the volumetric specific capacity is 8046mAh/cm3Among metal materials, the aluminum ion battery is the highest, and due to the ultrahigh volume and specific mass capacity, the aluminum ion battery becomes one of the best candidates for the next generation battery. The research on aluminum ion batteries is still in the initial stage relative to lithium ion batteries, and the limited selection of electrolytes limits the development thereof, so that the research on novel aluminum ion electrolytes is of great significance to the research on aluminum batteries. In 2016, doctor Linmontchang, a university of Stanford, Dacrojy, issued An ultra fast rechargeable aluminum-ion battery article, which opened the introduction of ultra long cycle aluminum ion batteries. However, AlCl is used3The base ionic liquid has extremely strong corrosivity and is easy to corrode the battery packaging material. In 2019, the long cycle of the aluminum ion battery made of Gel electrolyte of Gel Electrolytes with Wide electrode Window for High-rate Al-ion Batteries published by Beijing university of science and technology is not enough for 1000 cycles. Therefore, an electrolyte having low corrosiveness and capable of long-cycle is urgently required.
Disclosure of Invention
In order to improve the performance of the conventional aluminum ion battery, the invention firstly provides a preparation method and application of a novel safer and more excellent ionic liquid type gel electrolyte.
The invention researches different AlCl3And the gel electrolyte suitable for different aluminum ion batteries is researched according to the factors such as the ratio of the ionic liquid, the ratio of the ionic liquid to the polyamide, the heating temperature, the heating time and the like.
The invention also provides an ionic liquid for preparing the electrolyte of the aluminum ion battery, and the ionic liquid is prepared according to the preparation method.
The invention also provides a preparation method of the gel electrolyte for the aluminum ion battery, which comprises the following steps:
a) providing a dried polyamide; preferably, the polyamide is polyamide 6.
b) Adding proper amount of polyamide to AlCl3In the ionic liquid of the base series, the polyamide is completely soaked by the ionic liquid so as to be beneficial to the later two to be fully mixed;
c) heating and stirring at 40-150 deg.C for 1-12 hr to obtain gel electrolyte.
In one embodiment according to the present invention, the ionic liquid is prepared by a preparation method comprising the steps of:
1) drying treatment of component A and AlCl3；
2) Mixing AlCl3And EMIC in a molar ratio of 1-2: 1, slowly mixing;
3) stirring at room temperature until the mixture is completely dissolved to obtain a clear transparent or light yellow solution;
wherein the component A is selected from one or more of 1-ethyl-3-methylimidazole chloride salt (EMIC), acetamide, urea or triethylamine hydrochloride.
In one embodiment according to the invention, AlCl is present in step 1)3The drying treatment of EMIC is realized by the following steps:
AlCl3drying for 20-28h under the conditions of vacuum and 140 ℃ of 120-;
drying the component A for 20-28h under vacuum at 50-70 ℃.
In one embodiment according to the invention, the polyamide in step a) is dried by a process comprising the steps of:
drying the polyamide for at least 48h under the conditions of vacuum and 50-70 ℃.
In one embodiment according to the present invention, the method for preparing a gel electrolyte for an aluminum ion battery is characterized in that the ratio of the polyamide to the ionic liquid in step b) is 1: 1 to 50.
The invention further provides a gel electrolyte for an aluminum ion battery, which is prepared according to the preparation method.
The invention also provides the application of the gel electrolyte in preparing the aluminum ion battery. Preferably, the battery is selected from any one of an aluminum-sulfur battery, an aluminum-graphite battery, and an aluminum-oxide battery.
The invention further provides an aluminum ion battery, which comprises a positive electrode, an electrolyte, a diaphragm and a negative electrode;
the positive electrode and the negative electrode are respectively arranged on two sides of the diaphragm, and electrolytes are respectively filled between the positive electrode and the diaphragm and between the negative electrode and the diaphragm;
wherein the electrolyte is a gel electrolyte as described above;
the positive electrode is selected from graphite, sulfur, metal sulfide, metal oxide and the like;
the negative electrode is selected from aluminum foil, aluminum alloy, aluminum powder and the like;
the membrane is selected from glass fiber membrane, cellulose membrane, etc. Preferably, the aluminum ion battery is a button battery.
In one embodiment according to the present invention, the positive electrode in the aluminum ion battery is graphite, the negative electrode is aluminum foil, and the separator is glass fiber.
The preparation process is simple, and the required equipment is less; no waste water, waste gas or waste residue is generated, and the method is safe and environment-friendly; on the basis of inheriting the high ionic conductivity of the ionic liquid, the corrosion to the battery packaging material is reduced, so that the button battery can be assembled, and the AlCl is compensated3Unfortunately, the base ionic liquid can not be used for assembling the button cell.
Drawings
FIG. 1a shows AlCl3Schematic diagram of ionic liquid configured in different proportion with EMIC;
FIG. 1b shows different AlCl3A schematic diagram of ionic liquid type gel prepared by EMIC ionic liquid and polyamide according to a certain proportion;
FIG. 2 is a graph of rate capability tests of aluminum-graphite cells using different gels;
FIG. 3 is a long cycle plot of an aluminum-graphite cell using AE1.7 gel at 45 deg.C, 25 deg.C and-10 deg.C;
FIG. 4 is a graph showing the result of measurement of the charge/discharge performance of an aluminum-graphite battery using AU1.3+ PA gel at room temperature;
FIG. 5 is a graph showing the result of measurement of the charge/discharge performance of an aluminum-graphite battery using AA1.5+ PA gel at room temperature;
fig. 6 is a graph showing the results of the measurement of stable charge and discharge performance of the AT1.7+ PA gel for the aluminum-graphite battery AT room temperature.
Detailed Description
The following examples are intended to illustrate the present application but are not intended to limit the scope of the present application.
Specific embodiments of the present application will be described in more detail below. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.
Unless otherwise specified, the reagents used in the present invention are commercially available.
Example 1 preparation of gel electrolyte
1) Sufficient AlCl is added3EMIC was placed in a vacuum oven and heated to 130 ℃ and 60 ℃ under vacuum, respectively, and held at that temperature for 24 hours.
2) Sufficient polyamide is placed in a vacuum oven, heated to 60 ℃ under vacuum, and dried for 50 hours at 60 ℃.
3) Taking out the dried medicine, quickly placing into glove box (water and oxygen value is less than or equal to 0.1ppm) for standby
4) Weighing AlCl according to a certain molar ratio3With EMIC, slowly at room temperatureSlow mixing to obtain a clear solution. The solution is stirred for 6 hours at room temperature to prepare the ionic liquid with the required proportion for standby. Fig. 1a shows that 1.3, 1.5, 1.7 and 2.0 proportions of ionic liquids (named as AE1.3, AE1.5, AE1.7 and AE2.0 in sequence) are configured, and the ion concentrations in the ionic liquids are different in different proportions. Along with the increase of the proportion, Al in the ionic liquid2Cl7 -Increase in concentration of AlCl4 -The concentration of (c) is decreased.
5) Weighing a proper amount of AE series ionic liquid prepared in the step 4), and adding into a beaker; then weighing polyamide in a proper proportion, and adding the polyamide into a beaker to ensure that the polyamide is completely soaked by the ionic liquid.
6) And (3) placing the beaker in the step 5) on a magnetic stirring heating table, heating to 70 ℃, starting magnetic stirring, and keeping heating and stirring for 6 hours to obtain the finished product of the ionic liquid type gel. FIG. 1b shows gel electrolytes (named AE1.3+ PA, AE1.5+ PA, AE1.7+ PA and AE2.0+ PA in sequence) prepared corresponding to ionic liquids of 1.3, 1.5, 1.7 and 2.0 proportions, wherein the ion concentration in the gel electrolyte is different in different proportions, and the Al in the gel electrolyte increases along with the proportion2Cl7 -Increase in concentration of AlCl4 -The concentration of (c) is decreased.
Example 2 preparation of aluminum ion Battery
1) Mixing graphite and LA132 according to a ratio of 95:5, stirring for 3 hours at room temperature to obtain positive electrode material slurry, coating the slurry on a nickel foil, drying, and cutting into a wafer with the diameter of 12 cm. Drying, and placing into a glove box for later use.
2) Cutting the glass fiber into round pieces with the diameter of 18mm, drying and putting into a glove box for later use.
3) Cutting the aluminum foil into 16mm round pieces, drying and putting into a glove box for later use.
4) Uniformly coating the prepared gel electrolyte on the glass fiber diaphragm prepared in the step 2), then preparing the anode in the step 1), and symmetrically adhering the aluminum foils prepared in the step 3) to the two sides of the diaphragm to form the battery inner core.
5) Assembling 2032 button batteries with the prepared inner cores in the step 4). Thus obtaining the aluminum ion battery.
Example 3 Battery Performance testing
Aluminum foil is used as a negative electrode, a glass fiber diaphragm and graphite are used as a positive electrode, a gel electrolyte is filled between the positive electrode and the diaphragm and between the negative electrode and the diaphragm to assemble a 2032 type button cell, the button cell is placed for a period of time and then is subjected to constant current charge and discharge tests on a charge and discharge instrument, and the charge and discharge voltage intervals are respectively 1-2.4V (45 ℃), 1-2.45V (room temperature) and 1-2.45V and 1-2.6V (-10 ℃). It can be seen from fig. 2 that the AE1.7+ PA gel used for the aluminum-graphite battery has the best rate performance at room temperature, and fig. 3 is a graph showing the long cycle performance of the AE1.7+ PA gel used for the aluminum-graphite battery at different temperatures. Aluminum-graphite cells using AE1.7+ PA gel showed excellent long cycle performance at 45 ℃, 25 ℃ and-10 ℃.
Example 4 preparation of gel electrolyte
1) Sufficient AlCl is added3Urea (urea) was placed in vacuum ovens and heated to 130 ℃ and 80 ℃ under vacuum, respectively, and held at that temperature for 24 hours.
2) Sufficient polyamide is placed in a vacuum oven, heated to 60 ℃ under vacuum, and dried for 50 hours at 60 ℃.
3) Taking out the dried medicine, and quickly putting into a glove box (the water and oxygen values are less than or equal to 0.1ppm) for later use.
4) Weighing AlCl according to a certain molar ratio3Slowly mixing with Urea at room temperature to obtain solid-liquid mixture, stirring and heating at 60 deg.C for 10 hr to obtain transparent clear solution (here, AlCl)3The molar ratio to Urea was 1.3, designated AU1.3), ready for use.
5) Weighing a proper amount of AU series ionic liquid prepared in the step 4), and adding into a beaker; then weighing polyamide in a proper proportion, and adding the polyamide into a beaker to ensure that the polyamide is completely soaked by the ionic liquid.
6) And (3) placing the beaker in the step 5) on a magnetic stirring heating table, heating to 70 ℃, starting magnetic stirring, and keeping heating and stirring for 6 hours to obtain the finished product of the ionic liquid type gel, which is named as AU1.3+ PA.
Example 5 preparation of aluminum ion Battery
1) Mixing graphite and LA132 according to a ratio of 95:5, stirring for 3 hours at room temperature to obtain positive electrode material slurry, coating the slurry on a nickel foil, drying, and cutting into a wafer with the diameter of 12 cm. Drying, and placing into a glove box for later use.
2) Cutting the glass fiber into round pieces with the diameter of 18mm, drying and putting into a glove box for later use.
3) Cutting the aluminum foil into 16mm round pieces, drying and putting into a glove box for later use.
4) Uniformly coating the prepared gel electrolyte on the glass fiber diaphragm prepared in the step 2), then preparing the anode in the step 1), and symmetrically adhering the aluminum foils prepared in the step 3) to the two sides of the diaphragm to form the battery inner core.
5) Assembling 2032 button batteries with the prepared inner cores in the step 4). Thus obtaining the aluminum ion battery.
Example 6 Battery Performance testing
And (3) taking an aluminum foil as a negative electrode, a glass fiber diaphragm and graphite as a positive electrode, filling a gel electrolyte between the positive electrode and the diaphragm and between the negative electrode and the diaphragm to assemble a 2032 type button cell, standing for a period of time, and then carrying out constant-current charge and discharge tests on a charge and discharge instrument, wherein the charge and discharge voltage intervals are 1-2.45V (room temperature) respectively. It can be seen from fig. 4 that the AU1.3+ PA gel used for the aluminum-graphite battery has stable charge and discharge performance at room temperature.
Example 7 preparation of gel electrolyte
1) Sufficient AlCl is added3Acetamide (acetamide) was placed in a vacuum oven and heated to 130 ℃ and 50 ℃ under vacuum, respectively, and held at that temperature for 24 hours.
2) Sufficient polyamide is placed in a vacuum oven, heated to 60 ℃ under vacuum, and dried for 50 hours at 60 ℃.
3) Taking out the dried medicine, quickly placing into glove box (water and oxygen value is less than or equal to 0.1ppm) for standby
4) Weighing aluminum chloride and acetamide according to a certain molar ratio, slowly mixing at room temperature,
and stirred at room temperature for 6 hours to give a clear solution (here AlCl)3The molar ratio to acetamide was 1.5, designated AA1.5), for use.
5) Weighing a proper amount of AA series ionic liquid prepared in the step 4), and adding into a beaker; then weighing polyamide in a proper proportion, and adding the polyamide into a beaker to ensure that the polyamide is completely soaked by the ionic liquid.
6) And (3) placing the beaker in the step 5) on a magnetic stirring heating table, heating to 70 ℃, starting magnetic stirring, and keeping heating and stirring for 6 hours to obtain the finished product of the ionic liquid type gel, namely AA1.5+ PA.
Example 8 preparation of aluminum ion Battery
1) Mixing graphite and LA132 according to a ratio of 95:5, stirring for 3 hours at room temperature to obtain positive electrode material slurry, coating the slurry on a nickel foil, drying, and cutting into a wafer with the diameter of 12 cm. Drying, and placing into a glove box for later use.
2) Cutting the glass fiber into round pieces with the diameter of 18mm, drying and putting into a glove box for later use.
3) Cutting the aluminum foil into 16mm round pieces, drying and putting into a glove box for later use.
4) Uniformly coating the prepared gel electrolyte on the glass fiber diaphragm prepared in the step 2), then preparing the anode in the step 1), and symmetrically adhering the aluminum foils prepared in the step 3) to the two sides of the diaphragm to form the battery inner core.
5) Assembling 2032 button batteries with the prepared inner cores in the step 4). Thus obtaining the aluminum ion battery.
Example 9 Battery Performance testing
Taking aluminum foil as a negative electrode, a glass fiber diaphragm and graphite as a positive electrode, filling gel electrolyte between the positive electrode and the diaphragm and between the negative electrode and the diaphragm to assemble a 2032 type button cell, standing for a period of time, and then performing constant-current charge and discharge test on a charge and discharge instrument, wherein the charge and discharge voltage interval is 1-2.45V (room temperature), the current density is 100mA g, and the current density is 100mA g-1. It can be seen from fig. 5 that the aluminum-graphite battery has stable charge and discharge properties using the AA1.5+ PA gel at room temperature.
Example 10 preparation of gel electrolyte
1) Sufficient AlCl is added3Triethylamine hydrochloride (triethylamine hydrochloride) was placed in a vacuum oven, heated to 130 ℃ and 120 ℃ under vacuum, and kept at these temperatures for 24 hours.
2) Sufficient polyamide is placed in a vacuum oven, heated to 60 ℃ under vacuum, and dried for 50 hours at 60 ℃.
3) Taking out the dried medicine, quickly placing into glove box (water and oxygen value is less than or equal to 0.1ppm) for standby
4) Weighing aluminum chloride and triethylamine hydrochloride according to a certain molar ratio, slowly mixing at room temperature, and stirring at room temperature for 6 hours to obtain a transparent clear solution (here, AlCl)3The molar ratio to triethylamine hydrochloride was 1.7, designated AT1.7), for use.
5) Weighing a proper amount of AT series ionic liquid prepared in the step 4), and adding into a beaker; then weighing polyamide in a proper proportion, and adding the polyamide into a beaker to ensure that the polyamide is completely soaked by the ionic liquid.
6) And (3) placing the beaker in the step 5) on a magnetic stirring heating table, heating to 70 ℃, starting magnetic stirring, and keeping heating and stirring for 6 hours to obtain the finished product of the ionic liquid type gel, namely AT1.7+ PA.
Example 11 Battery Performance testing
Taking aluminum foil as a negative electrode, a glass fiber diaphragm and graphite as a positive electrode, filling gel electrolyte between the positive electrode and the diaphragm and between the negative electrode and the diaphragm to assemble a 2032 type button cell, standing for a period of time, and then performing constant-current charge and discharge test on a charge and discharge instrument, wherein the charge and discharge voltage interval is 1-2.45V (room temperature), the current density is 200mA g, and the current density is 200mA g-1. From fig. 6, it can be seen that AT1.7+ PA gel used in the aluminum-graphite battery AT room temperature has stable charge and discharge performance and extremely high coulombic efficiency (>99.5％)。
The above examples are summarized in the embodiments of the present invention, and the ratios of the aluminum ion batteries can be adjusted according to different systems to adapt to the battery system. The embodiments of the present invention are not limited to the above-described embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and are intended to be included in the scope of the present invention.

Claims (10)

1. A method of preparing a gel electrolyte for an aluminum ion battery, comprising:
a) providing a dried polyamide; preferably, the polyamide is polyamide 6;
b) adding proper amount of polyamide to AlCl3In the ionic liquid until the polyamide is completely soaked by the ionic liquid;
c) heating and stirring at 40-150 deg.C for 1-12 hr to obtain gel electrolyte.
2. A method for preparing a gel electrolyte for an aluminum ion battery, wherein the ionic liquid is prepared by a method comprising the steps of:
1) drying treatment of component A and AlCl3；
2) Mixing AlCl3And component A in a molar ratio of 1-2: 1, slowly mixing;
3) stirring at room temperature until the mixture is completely dissolved to obtain a clear transparent or light yellow solution;
wherein the component A is selected from one or more of 1-ethyl-3-methylimidazole chloride salt (EMIC), acetamide, urea or triethylamine hydrochloride.
3. The method of preparing the gel electrolyte of an aluminum ion battery according to claim 2, wherein the AlCl in the step 1)3The drying treatment of the component A is realized by the following steps:
AlCl3drying for 20-28h under the conditions of vacuum and 140 ℃ of 120-;
drying the component A for 20-28h under vacuum at 50-70 ℃.
4. The method of preparing a gel electrolyte for an aluminum ion battery according to claim 1, wherein the polyamide in the step a) is dried by a method comprising the steps of:
drying the polyamide for at least 48h under the conditions of vacuum and 50-70 ℃.
5. The method of preparing a gel electrolyte for an aluminum ion battery according to claim 1, wherein the ratio of the polyamide to the ionic liquid in step b) is 1: 1 to 50.
6. A gel electrolyte for an aluminum ion battery, wherein the gel electrolyte is produced according to the production method of any one of claims 1 to 5.
7. Use of the gel electrolyte of claim 6 in the preparation of an aluminum ion battery.
8. The use according to claim 7, wherein the aluminum-ion battery is selected from any one of an aluminum-sulfur battery, an aluminum-graphite battery, and an aluminum-oxide battery.
9. An aluminum ion battery is characterized by comprising a positive electrode, an electrolyte, a diaphragm and a negative electrode;
the positive electrode and the negative electrode are respectively arranged on two sides of the diaphragm, and electrolytes are respectively filled between the positive electrode and the diaphragm and between the negative electrode and the diaphragm;
wherein the electrolyte is a gel electrolyte according to claim 6;
the positive electrode is selected from any one of graphite, sulfur, metal sulfide and metal oxide;
the negative electrode is selected from any one of aluminum foil, aluminum alloy and aluminum powder;
the membrane is selected from a glass fiber membrane or a cellulose membrane.
10. The aluminum-ion battery of claim 9,
the positive electrode of the aluminum ion battery is graphite, the negative electrode of the aluminum ion battery is aluminum foil, and the diaphragm of the aluminum ion battery is glass fiber.
CN202010787818.8A 2020-08-07 2020-08-07 Gel electrolyte for aluminum ion battery and preparation method and application thereof Pending CN112002937A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112928262A (en) * 2021-02-24 2021-06-08 山东科技大学 Sodium-sulfur battery and preparation method thereof
CN113097565A (en) * 2021-03-29 2021-07-09 北京理工大学 Ionic liquid-like electrolyte for aluminum secondary battery and preparation method thereof

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