CN111211255A - Water-based lithium titanate battery and preparation method thereof - Google Patents
Water-based lithium titanate battery and preparation method thereof Download PDFInfo
- Publication number
- CN111211255A CN111211255A CN202010015674.4A CN202010015674A CN111211255A CN 111211255 A CN111211255 A CN 111211255A CN 202010015674 A CN202010015674 A CN 202010015674A CN 111211255 A CN111211255 A CN 111211255A
- Authority
- CN
- China
- Prior art keywords
- lithium titanate
- electrolyte
- lithium
- water
- titanate battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 83
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 70
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000003792 electrolyte Substances 0.000 claims abstract description 87
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 19
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 19
- 239000006258 conductive agent Substances 0.000 claims abstract description 9
- 229910003002 lithium salt Inorganic materials 0.000 claims abstract description 9
- 159000000002 lithium salts Chemical class 0.000 claims abstract description 9
- 239000007787 solid Substances 0.000 claims abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 36
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 29
- 239000006230 acetylene black Substances 0.000 claims description 24
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 claims description 23
- 239000011248 coating agent Substances 0.000 claims description 19
- 238000000576 coating method Methods 0.000 claims description 19
- 239000011888 foil Substances 0.000 claims description 19
- 239000002904 solvent Substances 0.000 claims description 18
- 239000000853 adhesive Substances 0.000 claims description 16
- 230000001070 adhesive effect Effects 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 16
- 239000004745 nonwoven fabric Substances 0.000 claims description 14
- 238000004537 pulping Methods 0.000 claims description 14
- 230000002209 hydrophobic effect Effects 0.000 claims description 11
- 238000000354 decomposition reaction Methods 0.000 claims description 9
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 8
- 229910001416 lithium ion Inorganic materials 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 5
- 239000002002 slurry Substances 0.000 claims description 4
- 150000003949 imides Chemical class 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000002086 nanomaterial Substances 0.000 claims description 3
- 239000012188 paraffin wax Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 230000003075 superhydrophobic effect Effects 0.000 claims description 3
- 239000000123 paper Substances 0.000 claims 1
- 238000004806 packaging method and process Methods 0.000 abstract description 7
- 230000008961 swelling Effects 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000003292 glue Substances 0.000 abstract description 2
- 239000007772 electrode material Substances 0.000 abstract 2
- 238000004064 recycling Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 6
- 239000005486 organic electrolyte Substances 0.000 description 6
- 238000005192 partition Methods 0.000 description 6
- 239000002985 plastic film Substances 0.000 description 6
- 229920006255 plastic film Polymers 0.000 description 6
- 239000008151 electrolyte solution Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 238000006460 hydrolysis reaction Methods 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 239000002360 explosive Substances 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229940093429 polyethylene glycol 6000 Drugs 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- QSZMZKBZAYQGRS-UHFFFAOYSA-N lithium;bis(trifluoromethylsulfonyl)azanide Chemical compound [Li+].FC(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)F QSZMZKBZAYQGRS-UHFFFAOYSA-N 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- 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
- H01M10/36—Accumulators not provided for in groups H01M10/05-H01M10/34
-
- 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
- H01M10/36—Accumulators not provided for in groups H01M10/05-H01M10/34
- H01M10/38—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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/626—Metals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
- H01M50/1245—Primary casings; Jackets or wrappings characterised by the material having a layered structure characterised by the external coating on the casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/138—Primary casings; Jackets or wrappings adapted for specific cells, e.g. electrochemical cells operating at high temperature
-
- 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
- H01M2300/0002—Aqueous electrolytes
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Cell Electrode Carriers And Collectors (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention provides a water-based lithium titanate battery and a preparation method thereof, belonging to the technical field of ion batteries and electrolyte. The present invention synthesizes an aqueous electrolyte having a wide electrochemical window by using an organic lithium salt, water and solid polyethylene glycol as electrolytes. The lithium titanate electrode active material disclosed by the invention has better efficiency by using the metallic aluminum as a conductive agent of the lithium titanate electrode active material and matching with the water-based electrolyte. The electrolyte is in a glue state, can well retain moisture, has good environmental adaptability, can be used under the condition of no packaging, and has low requirement on preparation environment. On the other hand, the lithium titanate battery can timely discharge gas decomposed by the electrolyte through the porous current collector and the package, can be communicated with the outside, and can timely discharge the decomposed gas, so that the lithium titanate battery is prevented from swelling. The water-based lithium titanate battery has the characteristics of good safety performance and recycling.
Description
Technical Field
The invention belongs to the technical field of ion batteries and electrolytes. In particular to a water-based lithium titanate battery and a preparation method thereof.
Technical Field
Currently, lithium ion batteries use flammable and explosive organic solvents as electrolyte solvents. The potential safety hazard of the organic electrolyte is very large. How to solve the safety problem of the lithium ion battery has received great attention in recent years. One approach to solve the safety problem of lithium ion batteries is to use aqueous electrolytes.
Compared with the organic electrolyte, the water system electrolyte has the advantages of low price, environmental protection, no safety problems of flammability, easy explosion and the like of the organic electrolyte. However, aqueous electrolytes have a significant disadvantage, namely low operating voltages. Because the thermodynamically stable potential of water is only around 1.23V. Water hydrolyzes at a lower voltage than organic electrolytes. Therefore, increasing the hydrolysis voltage of the aqueous solvent in the aqueous ion battery electrolyte is the key to realizing a high-performance aqueous electrochemical capacitor.
The negative electrode of the lithium titanate lithium ion battery adopts lithium titanate. Since lithium titanate has a relatively low working potential (1.55vvs. li) and a relatively high decomposition potential of water (2.2V vs. li), an aqueous electrolyte is difficult to use in a lithium titanate battery. The reaction potential of lithium titanate is difficult to achieve by the aqueous electrolyte.
Another problem of the lithium titanate battery is that the electrolyte of the lithium titanate battery is easily decomposed, so that the battery is easily swelled and the use performance of the battery is affected. How to solve the problem of lithium titanate battery bulge is one of the main problems influencing the application of lithium titanate batteries.
Compared with the traditional lithium titanate battery, the battery has high requirements on the environment, is particularly sensitive to moisture, and is difficult to scrap, dispose or recycle, thereby easily causing resource waste.
Disclosure of Invention
The invention aims to provide a solution for the problems of lithium titanate batteries.
Aiming at the problem that organic electrolyte is flammable and explosive, water system electrolyte is adopted to replace flammable and explosive organic electrolyte, and therefore safety performance of a lithium battery is further improved.
A water system lithium titanate battery is characterized in that the lithium titanate battery comprises a positive electrode, a negative electrode, a piece of separating paper, a conductive agent, an electrolyte and a current collector; non-woven fabrics are used as separation paper, lithium manganate is used as a positive electrode, lithium titanate is used as a negative electrode, solid polyethylene glycol and water are used as solvents in electrolyte, and lithium bistrifluoromethanesulfonylimide and lithium bistrifluoromethylsulfonyl imide are used as electrolytes; the mass ratio of the solid polyethylene glycol to the water is 8:2-9:1, the electrolyte concentration is 5-11mol/kg, and the molar ratio of the lithium ions to the water is reduced to below 1: 1.
Further, the electrolyte is a single lithium salt, or a mixture of lithium salts.
Further, the lithium titanate electrode adopts acetylene black or aluminum powder or aluminum wires as a conductive agent, and the mass ratio of the acetylene black to the aluminum is 0-1.
Further, the current collector is a porous current collector and comprises a porous carbon cloth and a porous aluminum foil.
The preparation method of the water-based lithium titanate battery is characterized in that the lithium manganate electrode is prepared, and the lithium manganate: acetylene black: the adhesive is prepared from the following components in percentage by weight: 1:1, dispersing and pulping, then coating on a porous aluminum foil, compacting and drying; preparing a lithium titanate electrode, wherein the lithium titanate: acetylene black or \ and aluminum powder: the adhesive is prepared from the following components in percentage by weight: 1:1 (the mass ratio of acetylene black or/and aluminum powder is 0-1) is uniformly dispersed to prepare slurry, then the slurry is coated on a porous aluminum foil, and the porous aluminum foil is compacted and dried at 5-10 MPa; the drying temperature is 75-85 ℃.
Further, the lithium titanate battery is packaged by adopting a package with a vent valve or a package with a through hole; the gas generated by the decomposition of the electrolyte is released through the pores.
Furthermore, the lithium titanate battery is coated with a hydrophobic coating outside, and the hydrophobic coating is paraffin or a super-hydrophobic nano material.
Since the water decomposition voltage is relatively low, when a voltage is applied to the electrodes (water decomposition voltage is reached), hydrolysis reaction occurs at the interface where the water solvent contacts the electrodes or the water solvent contacts the electrodes. In the electrolyte, water can be roughly divided into free water and bound water, the hydrolysis voltage of free water is relatively low (1.23V), and the hydrolysis voltage of bound water is relatively high (can reach and even exceed 3V). Therefore, the content of free water in the aqueous electrolyte solution is reduced, and the decomposition of the aqueous electrolyte solution can be effectively suppressed.
The method is mainly used for reducing the content of free water molecules in the electrolyte together, so that the working voltage of the electrolyte is improved, and the electrolyte can reach the working potential of the lithium titanate cathode.
The invention utilizes the solid polyethylene glycol with large molecular weight to be mixed and dissolved with water, and free water can be effectively reduced because the polyethylene glycol can generate hydrogen bonds with water. On the other hand, the high-concentration electrolyte further reduces the free water in the electrolyte by utilizing the strong adsorption effect between cations and water, thereby greatly improving the working voltage of the aqueous electrolyte. The solvent is solid polyethylene glycol and water in a mass ratio of 8:2-9:1, and the electrolyte is lithium salt with high solubility, such as lithium bistrifluoromethanesulfonylimide, lithium bistrifluoromethylsulfonyl imide and the like. The electrolyte can be a single lithium salt or a mixture of multiple lithium salts, and the concentration of the electrolyte is 5-11 mol/kg. The molar ratio of lithium ions to water is reduced to 1:1 or less by the high concentration of lithium salt, thereby allowing the electrolyte to achieve a wide operating potential.
The lithium titanate electrode adopts acetylene black and aluminum powder or aluminum wires as conductive agents, can be used as the conductive agents independently, and can also be used in a mixed manner. The mass ratio of the acetylene black to the aluminum may be 0 to 1. Because aluminum has better stability in an aqueous electrolyte, the aluminum powder or aluminum wires are used as a conductive agent, and compared with pure acetylene black, the aluminum powder or aluminum wires can better inhibit the decomposition of the electrolyte and have higher coulombic efficiency.
Aiming at the problem of swelling of a lithium titanate battery, the swelling problem is solved by a mode of timely discharging electrolyte to decompose and generate gas. We use a porous current collector such as a porous carbon cloth, a porous aluminum foil, etc. The gas generated by the decomposition of the electrolyte is released through the pores. The electrolyte is in a glue state, the solid polyethylene glycol has good moisture retention, the concentration of water in the electrolyte can be well maintained, and the lithium titanate battery manufactured by the method can work even in a non-packaging state and has good stability.
The electrolyte solution has the characteristics, and unlike the conventional battery packaging, the electrolyte solution discharges gas generated by decomposition of the electrolyte solution through the packaging with a ventilation function. The lithium titanate battery package can be a package with an air release valve or a package with a through hole, so that gas can be discharged in time, and a battery pack is prevented from swelling.
The invention adopts through hole type packaging to prevent the battery performance from being reduced due to the change of the water content in the electrolyte caused by the water absorption of the battery pack caused by humid air. The lithium titanate battery is coated with the hydrophobic coating which can be paraffin or a super-hydrophobic nano material on the outer package, so that the moisture in the adsorbed air can be reduced, the moisture in the air adsorbed by the battery can be inhibited, and the concentration of the water in the electrolyte can be ensured.
Compared with the traditional lithium titanate battery, the battery has high requirements on the environment, is particularly sensitive to moisture, and is difficult to recycle. Due to the open type packaging of the lithium titanate battery and the good environment adaptability of the electrolyte, the battery can be conveniently recycled.
In the aspect of lithium titanate batteries, the advantages of the invention are as follows:
the method adopted by the invention is simple and universal, and can improve the safety performance of the lithium ion battery.
2 the ion battery related by the invention has very low preparation environment requirement compared with the conventional ion battery because the electrolyte has good environment adaptability, and can greatly reduce the investment in the aspect of production and preparation conditions.
3 the invention adopts metal aluminum as conductive agent, which is matched with water system electrolyte, and has better performance, low price of metal aluminum and low use cost.
4 due to the open type packaging of the lithium titanate battery and the good environmental adaptability of the electrolyte, the battery can be conveniently recycled.
Drawings
FIG. 1 is a schematic view showing the structure of an aqueous lithium titanate battery according to the present invention,
fig. 2 is a charge-discharge curve of a lithium titanate battery of example 1.
Detailed Description
Example 1
Preparing a lithium manganate electrode, namely preparing lithium manganate: acetylene black: the adhesive is prepared from the following components in percentage by weight: 1:1, dispersing and pulping, then coating on a porous aluminum foil, compacting, and drying at 80 ℃. Preparing a lithium titanate electrode, wherein the lithium titanate: acetylene black: the adhesive is prepared from the following components in percentage by weight: 1:1, uniformly dispersing and pulping, then coating on a porous aluminum foil, compacting at 5-10MPa, and drying at 80 ℃. Preparing electrolyte, namely preparing 5mol/kg electrolyte by using lithium bistrifluoromethanesulfonylimide as electrolyte, polyethylene glycol 2000 as solubilizer and water as solvent, wherein the mass ratio of the polyethylene glycol 2000 to the water is 9: 1. Non-woven fabrics are made of partition paper, lithium manganate is used as a positive electrode, lithium titanate is used as a negative electrode, the glue-like electrolyte is coated on the non-woven fabrics, the glue-like electrolyte is packaged by a porous aluminum plastic film, and a hydrophobic material is sprayed on the surface of the glue-like electrolyte.
Example 2
Preparing a lithium manganate electrode, namely preparing lithium manganate: acetylene black: the adhesive is prepared from the following components in percentage by weight: 1:1, dispersing and pulping, then coating on porous carbon cloth, compacting, and drying at 80 ℃. Preparing a lithium titanate electrode, wherein the lithium titanate: acetylene black: the adhesive is prepared from the following components in percentage by weight: 1:1, uniformly dispersing and pulping, then coating on a porous aluminum foil, compacting at 5-10MPa, and drying at 80 ℃. Preparing electrolyte, namely preparing 5mol/kg electrolyte by using lithium bistrifluoromethanesulfonylimide as electrolyte, polyethylene glycol 2000 as solubilizer and water as solvent, wherein the mass ratio of the polyethylene glycol 2000 to the water is 9: 1. Non-woven fabrics are made of partition paper, lithium manganate is used as a positive electrode, lithium titanate is used as a negative electrode, the glue-like electrolyte is coated on the non-woven fabrics, the glue-like electrolyte is packaged by a porous aluminum plastic film, and a hydrophobic material is sprayed on the surface of the glue-like electrolyte.
Example 3
Preparing a lithium manganate electrode, namely preparing lithium manganate: acetylene black: the adhesive is prepared from the following components in percentage by weight: 1:1, dispersing and pulping, then coating on a porous aluminum foil, compacting, and drying at 80 ℃. Preparing a lithium titanate electrode, wherein the lithium titanate: acetylene black: the adhesive is prepared from the following components in percentage by weight: 1:1, uniformly dispersing and pulping, then coating on a porous aluminum foil, compacting at 5-10MPa, and drying at 80 ℃. Preparing an electrolyte, namely preparing 11mol/kg electrolyte by using lithium bistrifluoromethanesulfonylimide as an electrolyte, using polyethylene glycol 2000 as a solubilizer and using water as a solvent, wherein the mass ratio of the polyethylene glycol 2000 to the water is 8: 2. Non-woven fabrics are made of partition paper, lithium manganate is used as a positive electrode, lithium titanate is used as a negative electrode, the glue-like electrolyte is coated on the non-woven fabrics, the glue-like electrolyte is packaged by a porous aluminum plastic film, and a hydrophobic material is sprayed on the surface of the glue-like electrolyte.
Example 4
Preparing a lithium manganate electrode, namely preparing lithium manganate: acetylene black: the adhesive is prepared from the following components in percentage by weight: 1:1, dispersing and pulping, then coating on porous carbon cloth, compacting, and drying at 80 ℃. Preparing a lithium titanate electrode, wherein the lithium titanate: acetylene black: the adhesive is prepared from the following components in percentage by weight: 1:1, uniformly dispersing and pulping, then coating on a porous aluminum foil, compacting at 5-10MPa, and drying at 80 ℃. Preparing electrolyte, namely preparing 5.5mol/kg electrolyte by using lithium bistrifluoromethanesulfonimide as electrolyte, polyethylene glycol 6000 as solubilizer and water as solvent, wherein the mass ratio of the polyethylene glycol 6000 to the water is 8: 2. Non-woven fabrics are made of partition paper, lithium manganate is used as a positive electrode, lithium titanate is used as a negative electrode, the glue-like electrolyte is coated on the non-woven fabrics, the glue-like electrolyte is packaged by a porous aluminum plastic film, and a hydrophobic material is sprayed on the surface of the glue-like electrolyte.
Example 5
Preparing a lithium manganate electrode, namely preparing lithium manganate: acetylene black: the adhesive is prepared from the following components in percentage by weight: 1:1, dispersing and pulping, then coating on a porous aluminum foil, compacting, and drying at 80 ℃. Preparing a lithium titanate electrode, wherein the lithium titanate: aluminum powder: acetylene black: the adhesive is prepared from the following components in percentage by weight: 0.8:0.2: 1, uniformly dispersing and pulping, then coating on a porous aluminum foil, compacting at 5-10MPa, and drying at 80 ℃. Preparing electrolyte, namely preparing 5.5mol/kg electrolyte by using lithium bistrifluoromethanesulfonylimide as electrolyte, polyethylene glycol 2000 as solubilizer and water as solvent, wherein the mass ratio of the polyethylene glycol 2000 to the water is 9: 1. Non-woven fabrics are made of partition paper, lithium manganate is used as a positive electrode, lithium titanate is used as a negative electrode, the glue-like electrolyte is coated on the non-woven fabrics, the glue-like electrolyte is packaged by a porous aluminum plastic film, and a hydrophobic material is sprayed on the surface of the glue-like electrolyte.
Example 6
Preparing a lithium manganate electrode, namely preparing lithium manganate: acetylene black: the adhesive is prepared from the following components in percentage by weight: 1:1, dispersing and pulping, then coating on a porous aluminum foil, compacting, and drying at 80 ℃. Preparing a lithium titanate electrode, wherein the lithium titanate: aluminum powder: the adhesive is prepared from the following components in percentage by weight: 1:1, uniformly dispersing and pulping, then coating on a porous aluminum foil, compacting at 5-10MPa, and drying at 80 ℃. Preparing electrolyte, namely preparing 5.5mol/kg electrolyte by using lithium bistrifluoromethanesulfonylimide as electrolyte, polyethylene glycol 2000 as solubilizer and water as solvent, wherein the mass ratio of the polyethylene glycol 2000 to the water is 9: 1. Non-woven fabrics are made of partition paper, lithium manganate is used as a positive electrode, lithium titanate is used as a negative electrode, the glue-like electrolyte is coated on the non-woven fabrics, the glue-like electrolyte is packaged by a porous aluminum plastic film, and a hydrophobic material is sprayed on the surface of the glue-like electrolyte.
Claims (7)
1. The water-based lithium titanate battery is characterized by comprising a positive electrode, a negative electrode, a separation paper,
Conductive agent, electrolyte, current collector; non-woven fabrics are used as separation paper, lithium manganate is used as a positive electrode, lithium titanate is used as a negative electrode, solid polyethylene glycol and water are used as solvents in electrolyte, and lithium bistrifluoromethanesulfonylimide and lithium bistrifluoromethylsulfonyl imide are used as electrolytes; the mass ratio of the solid polyethylene glycol to the water is 8:2-9:1, the electrolyte concentration is 5-11mol/kg, and the molar ratio of the lithium ions to the water is reduced to below 1: 1.
2. The aqueous lithium titanate cell of claim 1, wherein the electrolyte is a single lithium salt or a mixture of lithium salts.
3. The aqueous lithium titanate battery according to claim 1, wherein the lithium titanate electrode uses acetylene black or aluminum powder or aluminum wire as a conductive agent, and the mass ratio of the acetylene black to the aluminum is 0 to 1.
4. The aqueous lithium titanate battery of claim 1, wherein the current collector is a porous current collector comprising a porous carbon cloth or a porous aluminum foil.
5. The method of producing an aqueous lithium titanate battery according to any one of claims 1 to 4, wherein the lithium manganate electrode is produced by: acetylene black: the adhesive is prepared from the following components in percentage by weight: 1:1, dispersing and pulping, then coating on a porous aluminum foil, compacting and drying; preparing a lithium titanate electrode, wherein the lithium titanate: acetylene black or \ and aluminum powder: the adhesive is prepared from the following components in percentage by weight: 1:1 (the mass ratio of acetylene black or/and aluminum powder is 0-1) is uniformly dispersed to prepare slurry, then the slurry is coated on a porous aluminum foil, and the porous aluminum foil is compacted and dried at 5-10 MPa; the drying temperature is 75-85 ℃.
6. The method for preparing an aqueous lithium titanate battery according to claim 5, wherein the lithium titanate battery is packaged with a vent valve or a package having a through hole; the gas generated by the decomposition of the electrolyte is released through the pores.
7. The method of claim 5, wherein the outer casing of the lithium titanate battery is coated with a hydrophobic coating, and the hydrophobic coating is paraffin or super-hydrophobic nano-material.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010015674.4A CN111211255B (en) | 2020-01-07 | 2020-01-07 | Water-based lithium titanate battery and preparation method thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010015674.4A CN111211255B (en) | 2020-01-07 | 2020-01-07 | Water-based lithium titanate battery and preparation method thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
CN111211255A true CN111211255A (en) | 2020-05-29 |
CN111211255B CN111211255B (en) | 2021-05-07 |
Family
ID=70788980
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202010015674.4A Active CN111211255B (en) | 2020-01-07 | 2020-01-07 | Water-based lithium titanate battery and preparation method thereof |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN111211255B (en) |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015086256A (en) * | 2013-10-29 | 2015-05-07 | 株式会社大成化研 | Granular or pasty fluid containing carbon nano-tube |
US20150214555A1 (en) * | 2011-11-15 | 2015-07-30 | Polyplus Battery Company | Lithium sulfur batteries and electrolytes and sulfur cathodes thereof |
JP2015191781A (en) * | 2014-03-28 | 2015-11-02 | 日産自動車株式会社 | Electrolyte for zinc secondary batteries and zinc secondary battery |
CN105449294A (en) * | 2014-09-26 | 2016-03-30 | 苏州宝时得电动工具有限公司 | Battery |
WO2017142990A1 (en) * | 2016-02-17 | 2017-08-24 | Eos Energy Storage, Llc | Halogen-based electrolyte containing carbon |
CN107256986A (en) * | 2017-07-27 | 2017-10-17 | 中国科学院宁波材料技术与工程研究所 | A kind of aqueous electrolyte and Water based metal ion battery |
US20170301949A1 (en) * | 2015-02-12 | 2017-10-19 | Fujifilm Corporation | All solid state secondary battery, solid electrolyte composition used therefor, electrode sheet for battery using the same, and method for manufacturing electrode sheet for battery and all solid state secondary battery |
CN110429267A (en) * | 2019-08-19 | 2019-11-08 | 河南师范大学 | The method for preparing nanoscale flake sodium-ion battery positive material using multi-template agent |
-
2020
- 2020-01-07 CN CN202010015674.4A patent/CN111211255B/en active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150214555A1 (en) * | 2011-11-15 | 2015-07-30 | Polyplus Battery Company | Lithium sulfur batteries and electrolytes and sulfur cathodes thereof |
JP2015086256A (en) * | 2013-10-29 | 2015-05-07 | 株式会社大成化研 | Granular or pasty fluid containing carbon nano-tube |
JP2015191781A (en) * | 2014-03-28 | 2015-11-02 | 日産自動車株式会社 | Electrolyte for zinc secondary batteries and zinc secondary battery |
CN105449294A (en) * | 2014-09-26 | 2016-03-30 | 苏州宝时得电动工具有限公司 | Battery |
US20170301949A1 (en) * | 2015-02-12 | 2017-10-19 | Fujifilm Corporation | All solid state secondary battery, solid electrolyte composition used therefor, electrode sheet for battery using the same, and method for manufacturing electrode sheet for battery and all solid state secondary battery |
WO2017142990A1 (en) * | 2016-02-17 | 2017-08-24 | Eos Energy Storage, Llc | Halogen-based electrolyte containing carbon |
CN107256986A (en) * | 2017-07-27 | 2017-10-17 | 中国科学院宁波材料技术与工程研究所 | A kind of aqueous electrolyte and Water based metal ion battery |
CN110429267A (en) * | 2019-08-19 | 2019-11-08 | 河南师范大学 | The method for preparing nanoscale flake sodium-ion battery positive material using multi-template agent |
Non-Patent Citations (1)
Title |
---|
MITHA ET AL.: "Thixotropic gel electrolyte containing poly(ethylene glycol) with high zinc ion concentration for the secondary aqueous Zn/LiMn2O4 battery", 《JOURNAL OF ELECTROANALYTICAL CHEMISTRY》 * |
Also Published As
Publication number | Publication date |
---|---|
CN111211255B (en) | 2021-05-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2020119594A1 (en) | Organogel polymer electrolyte, preparation method therefor and application thereof, sodium-based dual-ion battery and preparation method therefor | |
CN108172833B (en) | Zinc-based dual-ion battery and preparation method thereof | |
Li et al. | Rational design of an Allyl-rich Triazine-based covalent organic framework host used as efficient cathode materials for Li-S batteries | |
CN101562078B (en) | Super-capacitor and preparation method thereof | |
CN109167012A (en) | Multi-layer compound structure diaphragm and preparation method thereof and lithium-sulfur cell | |
CN110112475A (en) | It is a kind of to contain the sodium-ion battery anode and its preparation method and application for mending sodium additives | |
CN108807819A (en) | Diaphragm and preparation method thereof and lithium-sulfur cell | |
CN111653744A (en) | Sodium ion battery positive electrode sodium supplement additive, sodium ion battery positive electrode plate and sodium ion battery | |
CN105514378A (en) | Lithium-sulfur battery positive-pole composite material with imitated cellular structure and preparation method thereof | |
KR101503807B1 (en) | A manufacture method of lithium ion capacitor using lithium metal powder | |
CN102496746B (en) | Water-soluble lithium ion battery | |
CN101662020A (en) | Secondary aluminum battery and preparation of anode active material thereof | |
CN112574659A (en) | Electrode plate protective layer of lithium secondary battery and preparation method thereof | |
CN107331861A (en) | A kind of based lithium-ion battery positive plate and preparation method thereof | |
CN111697217A (en) | Preparation method of silicon/graphite composite cathode of lithium ion battery | |
CN105428620A (en) | Superconducting composite adhesive electrode paste, preparation method of superconducting composite adhesive electrode paste and preparation method of electrode slice of sulfur anode of superconducting lithium-sulfur battery | |
CN109411758B (en) | Preparation method of aqueous conductive adhesive for lithium ion battery cathode | |
CN111211255B (en) | Water-based lithium titanate battery and preparation method thereof | |
CN110380013A (en) | Ultra high power density lithium fluorocarbon positive electrode for battery material and preparation method and application | |
CN112322223A (en) | Modification method and application of lithium ion battery silicon-based negative electrode material binder | |
CN103804708A (en) | Poly(vinylidene fluoride-hexafluoropropenyl) gel polymer film as well as preparation and application thereof | |
CN110474051B (en) | Application of common dye rhodamine B as organic anode material of lithium ion battery | |
CN105529445A (en) | Negative electrode of lithium ion battery | |
CN102354620A (en) | All-solid-state supercapacitor and manufacturing method thereof | |
CN112151803B (en) | Preparation process of lithium ion battery cathode slurry |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |