CN115732770A - Flexible self-healing electrolyte membrane, preparation method thereof and battery - Google Patents

Flexible self-healing electrolyte membrane, preparation method thereof and battery Download PDF

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Publication number
CN115732770A
CN115732770A CN202211561928.8A CN202211561928A CN115732770A CN 115732770 A CN115732770 A CN 115732770A CN 202211561928 A CN202211561928 A CN 202211561928A CN 115732770 A CN115732770 A CN 115732770A
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electrolyte membrane
zinc
healing
gum
maleic
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陈人杰
李蕊
王晓丹
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Beijing Institute of Technology BIT
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Beijing Institute of Technology BIT
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The invention provides a flexible self-healing electrolyte membrane, a preparation method thereof and a battery, wherein the method comprises the following steps: adding maleic gum into an organic solvent, stirring until the maleic gum is dissolved, adding zinc salt, continuously stirring to obtain uniform suspension, pouring the suspension into a container, and drying to obtain the flexible self-healing electrolyte membrane. The electrolyte membrane prepared by the method has uniform texture, is in a porous shape, and has good conductivity (the conductivity can reach 0.8 to 1.6 x 10 under the environment of 60℃) ‑4 S cm ‑1 ) And has the bendable and self-healing performance (the electrolyte membrane can be recovered by hot pressing after being sheared). Zinc-MnO assembled by using the film 2 Full cell, showing good energy density (0.1 ag) ‑1 Has a specific mass capacity of 50mAh g at the current density of (2) ‑1 ) And cycle performance. The electrolyte membrane prepared by the invention has the advantages of simple preparation method, flexibility, self-healing property, stable performance, safe use and the likeHas the advantages of simple process and low cost.

Description

Flexible self-healing electrolyte membrane, preparation method thereof and battery
Technical Field
The invention relates to the technical field of batteries, in particular to a flexible self-healing electrolyte membrane, a preparation method thereof and a battery.
Background
Lithium ion Chi Mu has prompted researchers to find other energy storage systems to replace lithium ion batteries because of its disadvantages of high cost, low safety, and lithium resource scarcity. Recently, water-based zinc ion batteries have attracted much attention due to their advantages of green safety, outstanding theoretical capacity, low raw material cost, and the like.
The zinc ion battery system has the biggest disadvantages that the metallic zinc anode has poor cycle reversibility, and the zinc dendrite grows seriously in aqueous electrolyte and the electrochemical performance is unstable. Researches show that the instability of the metal zinc negative electrode performance can be relieved by replacing the aqueous liquid electrolyte with the solid electrolyte composed of chemically inert materials with high mechanical strength.
However, due to Zn 2+ The limitations of high charge density, achieving solid zinc ion electrolytes with high conductivity remains challenging. Previous research efforts on solid electrolytes for zinc ion batteries have focused primarily on the development of poly (ethylene oxide) (PEO) and different zinc salt systems, however, these systems have low solid electrolyte ionic conductivity (ranging from 10) -7 About S/cm), poor contact with the electrode, poor mechanical properties, and incapability of bending, stretching, twisting and other deformations, and is not enough for solid zinc ion battery application. Therefore, the development of new zinc ion solid electrolyte with high conductivity and high stability to meet the application of zinc ion batteries is an extremely important research and development direction.
Disclosure of Invention
The embodiment of the invention provides a preparation method of a flexible self-healing electrolyte membrane, which comprises the following steps:
adding maleic gum into an organic solvent, stirring until the maleic gum is dissolved, adding zinc salt, continuously stirring to obtain uniform suspension, pouring the suspension into a container, and drying to obtain the flexible self-healing electrolyte membrane.
Preferably, the mass ratio of the maleic gum to the zinc salt is 1:1-1:3;
preferably, the optimal mass ratio of the maleic gum to the zinc trifluoromethanesulfonate is 1:2. the conductivity of the solid electrolyte membrane prepared from the above-mentioned proportion of the maleic gum and the zinc trifluoromethanesulfonate is optimal.
Preferably, the mass/volume ratio of the maleic gum to the organic solvent is 1.
Preferably, the zinc salt comprises zinc triflate or zinc triflate acetate.
Preferably, the container comprises a glass; the temperature of the drying step is room temperature, and the time is 5-8 hours;
preferably, the organic solvent comprises chloroform;
preferably, the time for adding the maleic gum into the organic solvent and stirring until the maleic gum is dissolved is 1-2 hours; the time for adding the zinc salt and continuing stirring is 10 to 12 hours.
Preferably, the maleic gum is a trans isomer of rubber, and the main component is a trans polymer of isoamylene.
The invention also provides a flexible self-healing electrolyte membrane which is characterized by being prepared by any one of the methods.
The invention also provides zinc-MnO 2 A method of making a full cell, the method comprising the steps of:
firstly, a negative electrode shell is placed, a zinc negative electrode is placed on the negative electrode shell, the flexible self-healing electrolyte membrane is placed on the zinc negative electrode, and then MnO is added 2 The positive plate is arranged above the electrolyte membrane, covers the gasket, the elastic sheet and the positive shell, and is packaged by a battery packaging machine to obtain zinc-MnO 2 And (4) full cell.
The invention also provides a flexible self-healing electrolyte membrane, which is characterized in that the electrolyte membrane takes maleic gum as a matrix and zinc salt as a salt body, and the mass ratio of the maleic gum to the zinc salt is 1:1-1:3.
preferably, the zinc salt comprises zinc triflate or zinc triflate acetate;
preferably, the electrolyte membrane is in a porous shape, and the conductivity can reach 0.8-1.6 x 10 under the environment of 60 DEG C -4 S cm -1
The invention also provides zinc-MnO 2 A battery, characterized in that the battery comprises any one of the electrolyte membranes described above.
Preferably, theThe battery further includes: zinc negative electrodes and MnO respectively disposed at both sides of the electrolyte membrane 2 And (4) a positive plate.
The invention aims to improve the poorer electrochemical and mechanical stability of a zinc ion battery, firstly applies the maleic gum to the preparation of a zinc ion solid electrolyte membrane, and provides a preparation method of a flexible self-healing all-solid zinc ion electrolyte membrane, wherein the electrolyte membrane prepared by the method has uniform texture, is in a porous shape and has good conductivity (the conductivity can reach 0.8-1.6 x 10 under the environment of 60℃) -4 S cm -1 ) And has a flexible and self-healing property (the electrolyte membrane can be recovered by hot pressing after being cut). All-solid-state zinc-MnO assembled by using said film 2 Full cell, showing good energy density (0.1 Ag) -1 Has a specific mass capacity of 50mAh g at the current density of (2) -1 Above) and cycle performance. The electrolyte membrane prepared by the invention has the advantages of simple preparation method, flexibility, self-healing property, safe use and the like.
Drawings
The features and advantages of the present invention will be more clearly understood by reference to the accompanying drawings, which are illustrative and not to be construed as limiting the invention in any way, and in which:
FIG. 1 (a) is a diagram of an all-solid electrolyte membrane; (b) scanning electron micrographs of all-solid electrolyte membranes.
FIG. 2 is a graph of the conductivity of all-solid electrolyte membranes prepared in accordance with the present invention at various temperatures.
FIG. 3 is a self-healing performance test chart of the all-solid electrolyte membrane.
FIG. 4 shows Zn-MnO 2 And (5) a full cell cycling stability diagram.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention takes the maleic gum and the zinc trifluoromethanesulfonate or the zinc trifluoromethanesulfonate acetate as the raw materials and the trichloromethane as the solvent to prepare the flexible self-healing all-solid-state zinc ion electrolyte at the normal temperature. Wherein, in a trichloromethane solvent, the maleic gum and zinc trifluoromethanesulfonate or zinc trifluoromethanesulfonate acetate are crosslinked and can be dried at normal temperature to form the flexible self-healing electrolyte membrane.
Example 1:
(1) Adding 1.0g of maleic gum into 20ml of chloroform solvent, stirring for 1h, adding 1.5g of zinc trifluoromethanesulfonate, and continuously stirring for 10-12 h to obtain uniform suspension.
(2) And (3) pouring the suspension obtained in the step (1) into a glassware, and drying at normal temperature for 5-8 h to obtain the self-healing solid electrolyte membrane.
(3) The solid electrolyte membrane measured a conductivity of 0.8 x 10 under 60 degrees environment -4 S cm -1 . The test method comprises the following steps: and placing the gasket on a button cell cathode shell, adding the prepared electrolyte membrane, then placing the other gasket on the membrane, adding the elastic sheet, packaging into the button cell by using a packaging machine, measuring the resistance of the button cell by using an alternating current impedance method, and calculating to obtain the conductivity of the button cell.
Example 2:
(1) Adding 1.0g of maleic gum into 20ml of chloroform solvent, stirring for 2h, adding 2.0g of zinc trifluoromethanesulfonate, and continuously stirring for 10-12 h to obtain uniform suspension.
(2) Pouring the suspension obtained in the step 1 into a glassware, drying at normal temperature for 5-8 h to obtain a bendable self-healing solid electrolyte membrane, as shown in fig. 1 (a), wherein the surface of the electrolyte membrane is observed to be in a porous shape under a scanning electron microscope, as shown in fig. 1 (b).
(3) The conductivity of the solid electrolyte membrane is measured to be 1.6 x 10 under the environment of 60 DEG C -4 S cm -1 And the conductivity rises continuously along with the rise of the temperature, and under the environment of 80 ℃, the conductivity can reach 3.2 x 10 -4 S cm -1 See fig. 2.
(4) When the obtained solid electrolyte membrane (fig. 3 a) is sheared (fig. 3 b), the crack is self-healed to a complete solid electrolyte membrane after hot pressing (fig. 3 c).
(5) A zinc negative electrode, a solid electrolyte membrane and MnO 2 And sequentially overlapping the positive electrodes into a battery mould for pressurization and packaging. The obtained battery monomer is 0.1Ag -1 Has a specific mass capacity of 50mAh g at the current density of (2) -1 (calculated based on the positive active material) 200 cycles can be performed, see fig. 4.
Example 3:
(1) Adding 1.0g of maleic gum into 20ml of chloroform solvent, stirring for 1h, adding 2.5 g zinc trifluoromethanesulfonate, and continuously stirring for 10-12 h to obtain uniform suspension.
(2) Pouring the suspension obtained in the step 1 into a glass ware, and drying at normal temperature for 5-8 h to obtain the self-healing solid electrolyte membrane.
(3) The conductivity was measured to be 1.2 x 10 -4 S cm -1
Example 4:
(1) Adding 1.0g of maleic gum into 30ml of chloroform solvent, stirring for 1h, adding 3g of zinc trifluoromethanesulfonate, and continuously stirring for 10-12 h to obtain uniform suspension.
(2) Pouring the suspension obtained in the step 1 into a glass ware, and drying at normal temperature for 5-8 h to obtain the self-healing solid electrolyte membrane.
Figure BDA0003984988300000051
The foregoing embodiments are merely illustrative of the principles of this invention and its efficacy, rather than limiting it, and various modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the invention, which is defined in the appended claims.

Claims (10)

1. A method for preparing a flexible self-healing electrolyte membrane, comprising the steps of:
adding maleic gum into an organic solvent, stirring until the maleic gum is dissolved, adding zinc salt, continuously stirring to obtain uniform suspension, pouring the suspension into a container, and drying to obtain the flexible self-healing electrolyte membrane.
2. The method according to claim 1, characterized in that the mass ratio of the maleic gum to the zinc salt is 1:1-1:3;
preferably, the zinc salt comprises zinc triflate or zinc triflate acetate;
preferably, the mass/volume ratio of the maleic gum to the organic solvent is 1.
3. The method of claim 1, wherein the container comprises a glass vessel; the temperature of the drying step is room temperature, and the time is 5~8 hours;
preferably, the organic solvent comprises chloroform;
preferably, the time for adding the maleic gum into the organic solvent and stirring until the maleic gum is dissolved is 1~2 hours; the time for adding the zinc salt and continuing stirring is 10 to 12 hours.
4. The method of claim 1 wherein the maleic gum is a trans isomer of rubber and the major component is a trans polymer of isoamylene.
5. A flexible self-healing electrolyte membrane prepared by the method of any one of claims 1 to 4.
6. Zinc-MnO 2 A method for producing a full cell, characterized by comprising the steps of:
placing the negative casing first, placing the zinc negative electrode on the negative casing, placing the flexible self-healing electrolyte membrane of claim 5 on the zinc negative electrode, and then placing the MnO 2 The positive plate is arranged in the electrolysisCovering the film with the gasket, spring plate and positive electrode shell, and packaging with battery packaging machine to obtain zinc-MnO 2 And (4) full cell.
7. A flexible self-healing electrolyte membrane is characterized in that the electrolyte membrane takes maleic gum as a matrix and takes zinc salt as a salt body, and the mass ratio of the maleic gum to the zinc salt is 1:1-1:3.
8. the electrolyte membrane according to claim 7, wherein the zinc salt comprises zinc triflate or zinc triflate acetate;
preferably, the electrolyte membrane is in a porous shape, and the conductivity can reach 0.8 to 1.6 x 10 under the environment of 60 DEG C -4 S cm -1
Preferably, the electrolyte membrane has a bendable and self-healing property, that is, the electrolyte membrane can be restored by hot pressing after being cut.
9. Zinc-MnO 2 A battery comprising the electrolyte membrane according to any one of claims 7 to 8.
10. The battery of claim 9, further comprising: zinc cathode and MnO respectively arranged at two sides of the electrolyte membrane 2 And (4) a positive plate.
CN202211561928.8A 2022-12-07 2022-12-07 Flexible self-healing electrolyte membrane, preparation method thereof and battery Pending CN115732770A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1524302A (en) * 2001-04-19 2004-08-25 П Recombinant separator
CN104810549A (en) * 2015-04-20 2015-07-29 江苏科技大学 Method for preparing porous gel polymer electrolyte doped with composite nanoparticles
CN109860647A (en) * 2018-12-19 2019-06-07 苏州柔能纳米科技有限公司 Alkaline flexible electrolyte film of zinc-manganese battery and preparation method thereof
CN113437360A (en) * 2021-05-20 2021-09-24 上海大学 Novel gel electrolyte for zinc battery and preparation method thereof
WO2022133021A1 (en) * 2020-12-18 2022-06-23 Phillips 66 Company Ex situ electrolyte additives for batteries
CN115172868A (en) * 2022-07-06 2022-10-11 北京理工大学 Self-healing gel polymer electrolyte and preparation method and application thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1524302A (en) * 2001-04-19 2004-08-25 П Recombinant separator
CN104810549A (en) * 2015-04-20 2015-07-29 江苏科技大学 Method for preparing porous gel polymer electrolyte doped with composite nanoparticles
CN109860647A (en) * 2018-12-19 2019-06-07 苏州柔能纳米科技有限公司 Alkaline flexible electrolyte film of zinc-manganese battery and preparation method thereof
WO2022133021A1 (en) * 2020-12-18 2022-06-23 Phillips 66 Company Ex situ electrolyte additives for batteries
CN113437360A (en) * 2021-05-20 2021-09-24 上海大学 Novel gel electrolyte for zinc battery and preparation method thereof
CN115172868A (en) * 2022-07-06 2022-10-11 北京理工大学 Self-healing gel polymer electrolyte and preparation method and application thereof

Non-Patent Citations (1)

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Title
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