CN113258127B - Current collector-negative electrode integrated bipolar lithium secondary battery and method thereof - Google Patents
Current collector-negative electrode integrated bipolar lithium secondary battery and method thereof Download PDFInfo
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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
- H01M10/052—Li-accumulators
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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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- H01M10/058—Construction or manufacture
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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- 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
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- 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
Abstract
The invention discloses a bipolar lithium secondary battery with integrated current collector and negative electrode and a method thereof, wherein the bipolar lithium secondary battery comprises at least one positive electrode layer containing lithium transition metal oxide, at least one electrolyte layer and at least two current collector layers; two end sides of the bipolar lithium secondary battery, which are connected with the positive electrode lug and the negative electrode lug, are respectively provided with a current collector layer; the bipolar lithium secondary battery is provided with a lamination layer in the order of current collector layer, positive electrode layer and electrolyte layer from the positive electrode tab to the negative electrode tab. The secondary battery of the present invention has a bipolar layer integrating a current collector and a negative electrode, and a bipolar lithium secondary battery system is realized by connecting one surface of the current collector as a positive electrode and the other surface as an alloy negative electrode in series inside the bipolar layer composed of the above materials without a negative electrode active material.
Description
Technical Field
The invention belongs to the technical field of lithium batteries, and particularly relates to a bipolar lithium secondary battery with integrated current collector and negative electrode and a method thereof.
Background
Lithium ion batteries have been widely used in various fields such as small-sized mobile devices, new energy electric vehicles, and power grid energy storage systems due to various advantages such as high specific energy, long cycle life, and high safety. In order to meet the requirement of high-voltage system driving, a plurality of lithium batteries are generally connected in series externally, and insulating and sealing elements are arranged among the batteries. Therefore, the energy density of the battery can be improved by the method of internal series lamination using a bipolar lithium secondary battery. In bipolar lithium secondary batteries, a current collector is generally selected from stainless steel, titanium foil or composite foils of different materials as a carrier of an electrode coating layer. Further, the bipolar layer needs to be coated with a positive electrode active material and a negative electrode active material on both sides of the current collector, respectively. Therefore, the coating process of the positive and negative pole pieces in the bipolar electrode is complex, and the manufacturing cost of the current collector is high. Therefore, a new bipolar lithium battery system is needed to solve the deficiencies of the prior art.
Disclosure of Invention
In order to solve the technical problems, the invention provides a bipolar lithium secondary battery with integrated current collector and negative electrode and a method thereof.
The specific technical scheme adopted by the invention is as follows:
in a first aspect, the present invention provides a current collector-negative electrode integrated bipolar lithium secondary battery comprising at least one positive electrode layer containing lithium ions, at least one electrolyte layer, and at least two current collector layers; two end sides of the bipolar lithium secondary battery, which are connected with the positive electrode lug and the negative electrode lug, are respectively provided with a current collector layer; the bipolar lithium secondary battery is provided with a lamination layer in the order of current collector layer, positive electrode layer and electrolyte layer from the positive electrode tab to the negative electrode tab.
Preferably, the material of the current collector layer is one or more of aluminum foil and aluminum alloy, and the thickness is 20-200 μm.
Preferably, an insulating layer for preventing short circuit is coated outside each group of adjacent positive electrode layers and electrolyte layers.
Further, the insulating layer is one or more of a thermosetting adhesive, a thermoplastic adhesive, a polytetrafluoroethylene tape, a polyimide tape and a polyethylene terephthalate (PET) tape; the thermosetting adhesive is preferably one or more of epoxy resin, polyurethane, organic silicon and polyimide; the thermoplastic adhesive is preferably one or more of polyacrylate and polymethacrylate.
Preferably, the positive electrode layer is coated on the surface of the adjacent current collector layer.
Preferably, the positive electrode layer is composed of a positive electrode active material, a conductive agent and a binder, wherein the positive electrode active material accounts for 80-98 wt%; the positive electrode active material is lithium transition metal oxide, preferably one or more of lithium cobaltate, lithium iron phosphate, lithium nickel cobalt manganate, lithium nickel manganate and lithium manganate; the conductive agent is one or more of conductive carbon black, carbon fiber, ketjen black, carbon nano tube and graphite; the binder is one or more of polyvinylidene fluoride, polymethyl methacrylate, polytetrafluoroethylene, polyvinylidene fluoride-hexafluoropropylene, polyacrylonitrile, polyimide, polyethylene glycol, polyethylene oxide, polydopamine, lithium polyacrylate and polyvinylpyrrolidone.
Preferably, the electrolyte layer is one or more of a gel polymer electrolyte, a polymer electrolyte and an inorganic solid electrolyte; the gel polymer electrolyte is preferably one or more of polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene copolymer, polymethyl methacrylate, polyacrylonitrile and polyvinyl acetate; the polymer electrolyte is preferably one or more of polyethylene oxide, polypropylene oxide, polyethylene imine, polyethylene sulfide and polyvinyl acetate; the inorganic solid electrolyte is preferably Li 7 La 3 Zr 2 O 12 (LLZO) or Li 3x La 2/3-x TiO 3 (LLTO)。
Preferably, the positive electrode tab and the current collector layer attached to each other are connected by welding, and the negative electrode tab and the current collector layer attached to each other are connected by welding.
In a second aspect, the present invention provides a charge and discharge method using the bipolar lithium secondary battery of any one of the first aspects, specifically comprising:
when the bipolar lithium secondary battery is charged, lithium ions are separated from the positive electrode layer and move towards the negative electrode lug direction; after lithium ions pass through the electrolyte layer, alloying reaction or lithium deposition reaction occurs on the adjacent surface of the current collector layer and forms a negative electrode; under the condition that an additional negative electrode layer is not needed, the charging process of the bipolar lithium secondary battery is realized;
when the bipolar lithium secondary battery discharges, lithium accumulated on the surface of the current collector layer during charging is dealloyed and peeled off from the current collector layer; the lithium ions move towards the direction of the positive electrode lug, pass through the electrolyte layer and then return to the positive electrode layer again; the discharge process of the bipolar lithium secondary battery is achieved without an additional negative electrode layer.
Compared with the prior art, the invention has the following beneficial effects:
when the bipolar lithium secondary battery is charged, lithium ions are separated from the positive electrode layer and pass through the electrolyte layer to generate alloying reaction or metal lithium deposition reaction on the adjacent current collector layer to form a negative electrode, and lithium on the surface of the current collector is dealloyed and returns to the original positive electrode layer again when discharging. The invention can realize the series connection of the battery interiors by internally laminating different numbers of battery units, and prepare the bipolar lithium secondary battery system. According to the invention, one side of the positive current collector is used as an alloy negative electrode, so that a negative electrode active material is omitted, the specific energy of the battery is obviously improved, and in addition, the preparation process of the double electrodes is simplified, and the practicability of the double-electrode current collector is improved.
Drawings
Fig. 1 is a schematic structural view of a battery cell;
fig. 2 is a schematic view illustrating the operation of a bipolar lithium secondary battery (including a battery cell) in a first configuration;
fig. 3 is a schematic view illustrating the operation of a bipolar lithium secondary battery (including three battery cells) in a second configuration;
FIG. 4 is a schematic diagram of an insulating layer structure;
FIG. 5 is LiFePO of example 1 4 Charge-discharge curve graph of Al bipolar lithium secondary battery;
FIG. 6 shows the LiNi of example 3 1/3 Co 1/3 Mn 1/3 O 2 Charge-discharge curve graph of Al bipolar lithium secondary battery.
Detailed Description
The invention is further illustrated and described below with reference to the drawings and detailed description. The technical features of the embodiments of the invention can be combined correspondingly on the premise of no mutual conflict.
The invention provides a bipolar lithium secondary battery with integrated current collector and negative electrode, which comprises at least one positive electrode layer 2 containing lithium ions, at least one electrolyte layer 3 and at least two current collector layers 1. In a bipolar lithium secondary battery, a current collector layer 1 is provided on one end side connected to a positive electrode tab, and a current collector layer 1 is also provided on the other end side connected to a negative electrode tab. The bipolar lithium secondary battery is laminated in the order of the current collector layer 1, the positive electrode layer 2 and the electrolyte layer 3 from the positive electrode tab to the negative electrode tab.
That is, if the current collector layer 1-positive electrode layer 2-electrolyte layer 3 connected by the top-to-bottom lamination is regarded as one cell, as shown in fig. 1, the bipolar lithium secondary battery includes at least one cell, each cell is laminated and stacked, and the current collector layer 1 is laminated and provided at the bottom of the electrolyte layer 3 of the lowermost cell. The current collector layer 1 of the uppermost battery cell in the bipolar lithium secondary battery is connected to the positive electrode tab, and the current collector layer 1 of the lowermost battery cell is connected to the negative electrode tab, as shown in fig. 2.
As shown in fig. 3, when the battery cells are stacked on each other, the battery cells are connected in series with each other, for example, lithium iron phosphate is used as the positive electrode, aluminum foil is used as the current collector, and single LiFePO 4 The average discharge voltage of the/Al battery cell is about 3.0V, and the average discharge voltage of the 3 battery cells stacked together is as high as 9.0V. Meanwhile, aluminum tabs (including positive tabs and negative tabs) can be welded on the current collector layer of the first layer and the current collector layer of the last layer respectively, and the soft package battery can be assembled together.
In the bipolar lithium secondary battery, since the current collector layer has electron conductivity and no ion conductivity, lithium ions do not pass through the current collector layer during charge and discharge of the battery; since the positive electrode layer is generally a powdery material, the positive electrode layer can be coated on one surface of the current collector layer, so that the current collector layer also plays a role in supporting the positive electrode layer, and the current collector layer positioned at the uppermost layer can also increase the conductivity of the positive electrode.
In practical use, in order to make the bipolar lithium secondary battery performMore preferably, the material of the current collector layer 1 may be one or more of aluminum foil and aluminum alloy, and the thickness of the layer may be set to 20 to 200 μm. The positive electrode layer 2 is mainly composed of a positive electrode active material, a conductive agent and a binder, wherein the positive electrode active material accounts for 80-98wt%, and the slurry of the positive electrode active material, the conductive agent and the binder can be uniformly mixed and then coated on a current collector layer or pressed on the surface of the current collector layer after an electrode is manufactured by a dry method. The positive electrode active material may be a lithium transition metal oxide such as lithium cobalt oxide LiCoO 2 Lithium iron phosphate LiFePO 4 Lithium nickel cobalt manganese oxide LiNi x Co y Mn 1-x-y O 2 Lithium nickel manganese oxide LiNi 0.5 Mn 1.5 O 4 Or lithium manganate LiMn 2 O 4 One or more of the following; the conductive agent can be one or more of conductive carbon black, carbon fiber, ketjen black, carbon nano tube and graphite; the binder may be one or more of polyvinylidene fluoride (PVDF), polymethyl methacrylate (PMMA), polytetrafluoroethylene (PTFE), polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP), polyacrylonitrile (PAN), polyimide (PI), polyethylene glycol (PEG), polyethylene oxide (PEO), polydopamine (PDA), lithium polyacrylate (LiPAA), and polyvinylpyrrolidone (PVP). The electrolyte layer may be one or more of a gel polymer electrolyte, preferably one or more of polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene copolymer (PVDF-HFP), polymethyl methacrylate, polyacrylonitrile and polyvinyl acetate, a polymer electrolyte, preferably one or more of polyethylene oxide, polypropylene oxide, polyethylene imine, polyethylene sulfide and polyvinyl acetate, and an inorganic solid electrolyte, preferably Li 7 La 3 Zr 2 O 12 (LLZO) or Li 3x La 2/3-x TiO 3 (LLTO)。
In practical application, in order to make the performance of the bipolar lithium secondary battery better, insulating layers for preventing short circuits can be coated outside each group of adjacent positive electrode layers 2 and electrolyte layers 3, and the insulating layers can isolate the current collector layers of adjacent cells, so that on one hand, the electrolyte of the adjacent cells is prevented from penetrating each other, and on the other hand, the current collector layers of the adjacent cells can be prevented from contacting each other, thereby effectively avoiding internal short circuits between the adjacent cells. The insulating layer may be one or more of thermosetting adhesive, thermoplastic adhesive, polytetrafluoroethylene adhesive tape, polyimide adhesive tape and polyethylene terephthalate (PET) adhesive tape, wherein the thermosetting adhesive is preferably one or more of epoxy resin, polyurethane, organosilicon and polyimide, and the thermoplastic adhesive is preferably one or more of polyacrylate and polymethacrylate.
When the bipolar lithium secondary battery is used for charge and discharge, the specific method is as follows:
when the bipolar lithium secondary battery is charged, lithium ions are extracted from the positive electrode layer 2 and move toward the negative electrode tab. After lithium ions pass through the electrolyte layer 3, an alloying reaction or a lithium deposition reaction occurs at the adjacent surface of the current collector layer 1 and forms a negative electrode. The charging process of the bipolar lithium secondary battery is achieved without an additional negative electrode layer. When the bipolar lithium secondary battery is discharged, lithium accumulated on the surface of the current collector layer 1 is dealloyed and peeled off from the current collector layer 1 upon charging. The lithium ions move in the direction of the positive electrode tab, pass through the electrolyte layer 3, and then return to the positive electrode layer 2. The discharge process of the bipolar lithium secondary battery is achieved without an additional negative electrode layer. That is, a positive electrode structure is formed between the positive electrode layer in each battery cell and the opposite current collector plate in the adjacent battery cell through the electrolyte layer, so that the charge and discharge process of the battery can be realized without adding an additional negative electrode layer.
Example 1
The present embodiment provides a LiFePO 4 An Al bipolar lithium secondary battery, concretely comprising:
first LiFePO is added 4 Mixing with conductive carbon black and polyvinylidene fluoride according to 90:5:5 is put into N-methyl pyrrolidone (NMP) solution, evenly mixed, coated on an aluminum current collector and dried in vacuum. The current collector was chosen from aluminum foil with a thickness of 80 μm and the electrolyte was chosen from gel electrolyte (1M LiPF 6 EC/DEC+30% PVDF-HFP). And stacking the current collector/positive electrode layer, the electrolyte layer, the current collector/positive electrode layer and the current collector in sequence, wherein the open-circuit voltage of the prepared serial lithium secondary battery is 6.0V.
LiFePO 4 The charge-discharge curve of the Al bipolar lithium secondary battery is shown in fig. 5, and it can be seen from the figure that the charge plateau of the battery is located at about 6.3V and the discharge plateau is located at about 5.9V. Since the potential of the lithium aluminum alloy is about 0.3V, liFePO 4 The charging platform of the anode is about 3.45V, so that two LiFePO are formed 4 The charging platform after the Al series connection is up to 6.3V.
Example 2
The present embodiment provides a LiFePO 4 An Al bipolar lithium secondary battery, concretely comprising:
first LiFePO is added 4 Mixing with conductive carbon black and polyvinylidene fluoride according to 90:5:5, putting the mixture into N-methyl pyrrolidone solution, uniformly mixing, coating the mixture on an aluminum current collector, and drying the aluminum current collector in vacuum. The current collector is aluminum foil, the electrolyte is PEO polymer electrolyte, and the PEO electrolyte is uniformly coated on the surface of the positive electrode layer. The current collector/positive electrode layer, the electrolyte layer, the current collector/positive electrode layer and the current collector are sequentially stacked to obtain LiFePO 4 Al bipolar lithium secondary battery.
Example 3
The embodiment provides an LiNi 1/3 Co 1/3 Mn 1/3 O 2 An Al bipolar lithium secondary battery, concretely comprising:
first, liNi is added 1/3 Co 1/3 Mn 1/3 O 2 Mixing with conductive carbon black and polyvinylidene fluoride binder according to 90:5:5, putting the mixture into N-methyl pyrrolidone solution, uniformly mixing, coating the mixture on an aluminum current collector, and drying the aluminum current collector in vacuum. The current collector was aluminum foil, and the electrolyte was gel electrolyte (1M LiPF 6 EC/DEC+30% PVDF-HFP). Stacking the current collector/positive electrode layer, the electrolyte layer, the current collector/positive electrode layer and the current collector in sequence to obtain the LiNi 1/3 Co 1/3 Mn 1/3 O 2 Al bipolar lithium secondary battery. Two LiNi obtained 1/3 Co 1/3 Mn 1/3 O 2 The charge-discharge curve of the/Al battery series is shown in fig. 6, and it can be seen from the graph that the average charge voltage of the battery is about 6.8V and the average discharge voltage is about 6.3V.
Example 4
The present embodiment provides a LiCoO 2 An Al bipolar lithium secondary battery, concretely comprising:
LiCoO is firstly carried out 2 Mixing with conductive carbon black and polyvinylidene fluoride binder according to 90:5:5, putting the mixture into N-methyl pyrrolidone solution, uniformly mixing, coating the mixture on an aluminum current collector, and drying the aluminum current collector in vacuum. The current collector was aluminum foil, and the electrolyte was gel electrolyte (1M LiPF 6 EC/DEC+30% PVDF-HFP). Stacking the current collector/positive electrode layer, the electrolyte layer, the current collector/positive electrode layer and the current collector in sequence to obtain LiCoO 2 Al bipolar lithium secondary battery. Two prepared LiNi 1/3 Co 1/3 Mn 1/3 O 2 The average charge voltage after the Al cells are connected in series is about 7.0V, and the average discharge voltage is about 6.7V.
The above embodiment is only a preferred embodiment of the present invention, but it is not intended to limit the present invention. Various changes and modifications may be made by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present invention. Therefore, all the technical schemes obtained by adopting the equivalent substitution or equivalent transformation are within the protection scope of the invention.
Claims (6)
1. A bipolar lithium secondary battery with integrated current collector and negative electrode is characterized by comprising at least two battery units, wherein adjacent battery units are laminated and stacked; the battery unit consists of a current collector layer (1), a positive electrode layer (2) containing lithium ions and an electrolyte layer (3) which are laminated and connected from top to bottom; the bottom of the battery unit at the lowest part is provided with a current collector layer (1) in a bonding way and is connected with the negative electrode lug, and the current collector layer (1) of the battery unit at the highest part is connected with the positive electrode lug; the bipolar lithium secondary battery is formed by laminating and laminating a current collector layer (1), a positive electrode layer (2) and an electrolyte layer (3) in the order from the positive electrode lug to the negative electrode lug; the material of the current collector layer (1) is one or more of aluminum foil and aluminum alloy, and the thickness is 20-200 mu m;
the charge and discharge method of the bipolar lithium secondary battery comprises the following specific steps:
when the bipolar lithium secondary battery is charged, lithium ions are separated from the positive electrode layer (2) and move towards the negative electrode lug direction; after lithium ions pass through the electrolyte layer (3), alloying reaction or lithium deposition reaction occurs on the adjacent surface of the current collector layer (1) and forms a negative electrode; under the condition that an additional negative electrode layer is not needed, the charging process of the bipolar lithium secondary battery is realized;
when the bipolar lithium secondary battery discharges, lithium accumulated on the surface of the current collector layer (1) during charging is dealloyed and peeled off from the current collector layer (1); the lithium ions move towards the direction of the positive electrode lug, pass through the electrolyte layer (3) and then return to the positive electrode layer (2); under the condition that an additional negative electrode layer is not needed, the discharging process of the bipolar lithium secondary battery is realized;
insulating layers for preventing short circuits are coated outside the positive electrode layers (2) and the electrolyte layers (3) adjacent to each other;
the insulating layer is one or more of a thermosetting adhesive, a thermoplastic adhesive, a polytetrafluoroethylene adhesive tape, a polyimide adhesive tape and a PET adhesive tape; the thermosetting adhesive is preferably one or more of epoxy resin, polyurethane, organic silicon and polyimide; the thermoplastic adhesive is preferably one or more of polyacrylate and polymethacrylate.
2. The bipolar lithium secondary battery as claimed in claim 1, wherein the positive electrode layer (2) is coated on the surface of the adjacent current collector layer (1).
3. The bipolar lithium secondary battery as claimed in claim 1, wherein the positive electrode layer (2) is composed of a positive electrode active material, a conductive agent and a binder, wherein the positive electrode active material is 80 to 98wt%: the positive electrode active material is lithium transition metal oxide, preferably one or more of lithium cobaltate, lithium iron phosphate, lithium nickel cobalt manganate, lithium nickel manganate and lithium manganate; the conductive agent is one or more of conductive carbon black, carbon fiber, ketjen black, carbon nano tube and graphite; the binder is one or more of polyvinylidene fluoride, polymethyl methacrylate, polytetrafluoroethylene, polyvinylidene fluoride-hexafluoropropylene, polyacrylonitrile, polyimide, polyethylene glycol, polyethylene oxide, polydopamine, lithium polyacrylate and polyvinylpyrrolidone.
4. The bipolar lithium secondary battery of claim 1 wherein the electrolyte layer is one or more of a gel polymer electrolyte, a polymer electrolyte, and an inorganic solid state electrolyte; the gel polymer electrolyte is preferably one or more of polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene copolymer, polymethyl methacrylate, polyacrylonitrile and polyvinyl acetate: the polymer electrolyte is preferably one or more of polyethylene oxide, polypropylene oxide, polyethylene imine, polyethylene sulfide and polyvinyl acetate: the inorganic solid electrolyte is preferably Li 7 La 3 Zr 2 O 12 Or Li (lithium) 3x La 2/3-x TIO 3 。
5. The bipolar lithium secondary battery as claimed in claim 1, wherein the positive electrode tab and the current collector layer (1) attached to each other are connected by welding, and the negative electrode tab and the current collector layer (1) attached to each other are connected by welding.
6. A charge and discharge method using the bipolar lithium secondary battery according to any one of claims 1 to 5, characterized by comprising the steps of:
when the bipolar lithium secondary battery is charged, lithium ions are separated from the positive electrode layer (2) and move towards the negative electrode lug direction; after lithium ions pass through the electrolyte layer (3), alloying reaction or lithium deposition reaction occurs on the adjacent surface of the current collector layer (1) and forms a negative electrode; under the condition that an additional negative electrode layer is not needed, the charging process of the bipolar lithium secondary battery is realized;
when the bipolar lithium secondary battery discharges, lithium accumulated on the surface of the current collector layer (1) during charging is dealloyed and peeled off from the current collector layer (1); the lithium ions move towards the direction of the positive electrode lug, pass through the electrolyte layer (3) and then return to the positive electrode layer (2); the discharge process of the bipolar lithium secondary battery is achieved without an additional negative electrode layer.
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Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101388448A (en) * | 2006-09-14 | 2009-03-18 | 日产自动车株式会社 | Positive electrode for non-aqueous electrolyte secondary battery and non-aqueous electrolyte secondary battery using the same |
| CN102422476A (en) * | 2009-06-25 | 2012-04-18 | 日产自动车株式会社 | Bipolar secondary battery |
| CN103700807A (en) * | 2013-11-29 | 2014-04-02 | 徐敖奎 | High-voltage lithium ion battery and preparation method thereof |
| CN105449186A (en) * | 2015-11-18 | 2016-03-30 | 中国科学院深圳先进技术研究院 | Novel secondary battery and preparation method therefor |
| CN107615550A (en) * | 2016-05-06 | 2018-01-19 | 深圳先进技术研究院 | A kind of secondary cell and preparation method thereof |
| CN207097947U (en) * | 2017-08-11 | 2018-03-13 | 天津中能锂业有限公司 | Lithium-sulfur cell |
| CN109155434A (en) * | 2016-05-06 | 2019-01-04 | 深圳中科瑞能实业有限公司 | A kind of secondary cell and preparation method thereof |
| CN109768334A (en) * | 2018-12-25 | 2019-05-17 | 中国电子科技集团公司第十八研究所 | Preparation method of bipolar solid-state lithium secondary battery |
| CN110010954A (en) * | 2018-01-05 | 2019-07-12 | 三星电子株式会社 | Without cathode lithium metal battery and its manufacturing method |
| CN209447927U (en) * | 2019-03-04 | 2019-09-27 | 江西星盈科技有限公司 | All solid lithium metal battery |
| CN110635107A (en) * | 2019-10-24 | 2019-12-31 | 邦泰宏图（深圳）科技有限责任公司 | Bipolar solid-state lithium ion battery without base material and manufacturing method thereof |
| CN110785886A (en) * | 2017-06-26 | 2020-02-11 | 株式会社Lg化学 | Lithium secondary battery |
| WO2020091453A1 (en) * | 2018-10-31 | 2020-05-07 | 주식회사 엘지화학 | Lithium secondary battery |
| CN111370756A (en) * | 2020-02-24 | 2020-07-03 | 青岛大学 | High-voltage solid-state lithium battery and preparation method thereof |
| CN111710817A (en) * | 2020-06-28 | 2020-09-25 | 昆山宝创新能源科技有限公司 | Solid-state battery and preparation method and application thereof |
| CN111740153A (en) * | 2020-08-26 | 2020-10-02 | 清陶（昆山）能源发展有限公司 | All-solid-state lithium ion battery |
| CN112736277A (en) * | 2019-10-28 | 2021-04-30 | 天津中能锂业有限公司 | Solid electrolyte-lithium negative electrode complex, method for producing same, and all-solid-state lithium secondary battery |
-
2021
- 2021-05-31 CN CN202110599700.7A patent/CN113258127B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101388448A (en) * | 2006-09-14 | 2009-03-18 | 日产自动车株式会社 | Positive electrode for non-aqueous electrolyte secondary battery and non-aqueous electrolyte secondary battery using the same |
| CN102422476A (en) * | 2009-06-25 | 2012-04-18 | 日产自动车株式会社 | Bipolar secondary battery |
| CN103700807A (en) * | 2013-11-29 | 2014-04-02 | 徐敖奎 | High-voltage lithium ion battery and preparation method thereof |
| CN105449186A (en) * | 2015-11-18 | 2016-03-30 | 中国科学院深圳先进技术研究院 | Novel secondary battery and preparation method therefor |
| CN107615550A (en) * | 2016-05-06 | 2018-01-19 | 深圳先进技术研究院 | A kind of secondary cell and preparation method thereof |
| CN109155434A (en) * | 2016-05-06 | 2019-01-04 | 深圳中科瑞能实业有限公司 | A kind of secondary cell and preparation method thereof |
| CN110785886A (en) * | 2017-06-26 | 2020-02-11 | 株式会社Lg化学 | Lithium secondary battery |
| CN207097947U (en) * | 2017-08-11 | 2018-03-13 | 天津中能锂业有限公司 | Lithium-sulfur cell |
| CN110010954A (en) * | 2018-01-05 | 2019-07-12 | 三星电子株式会社 | Without cathode lithium metal battery and its manufacturing method |
| WO2020091453A1 (en) * | 2018-10-31 | 2020-05-07 | 주식회사 엘지화학 | Lithium secondary battery |
| CN109768334A (en) * | 2018-12-25 | 2019-05-17 | 中国电子科技集团公司第十八研究所 | Preparation method of bipolar solid-state lithium secondary battery |
| CN209447927U (en) * | 2019-03-04 | 2019-09-27 | 江西星盈科技有限公司 | All solid lithium metal battery |
| CN110635107A (en) * | 2019-10-24 | 2019-12-31 | 邦泰宏图（深圳）科技有限责任公司 | Bipolar solid-state lithium ion battery without base material and manufacturing method thereof |
| CN112736277A (en) * | 2019-10-28 | 2021-04-30 | 天津中能锂业有限公司 | Solid electrolyte-lithium negative electrode complex, method for producing same, and all-solid-state lithium secondary battery |
| CN111370756A (en) * | 2020-02-24 | 2020-07-03 | 青岛大学 | High-voltage solid-state lithium battery and preparation method thereof |
| CN111710817A (en) * | 2020-06-28 | 2020-09-25 | 昆山宝创新能源科技有限公司 | Solid-state battery and preparation method and application thereof |
| CN111740153A (en) * | 2020-08-26 | 2020-10-02 | 清陶（昆山）能源发展有限公司 | All-solid-state lithium ion battery |
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