CN215731843U - Integrated solid-state lithium battery without negative electrode - Google Patents
Integrated solid-state lithium battery without negative electrode Download PDFInfo
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- CN215731843U CN215731843U CN202122028759.9U CN202122028759U CN215731843U CN 215731843 U CN215731843 U CN 215731843U CN 202122028759 U CN202122028759 U CN 202122028759U CN 215731843 U CN215731843 U CN 215731843U
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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 utility model discloses a non-negative integrated solid lithium battery, which comprises a first aluminum foil layer, a lithium-containing positive electrode layer, an organic-inorganic composite solid electrolyte layer and a second aluminum foil layer which are sequentially stacked, wherein the organic-inorganic composite solid electrolyte layer is coated on one side surface, close to the first aluminum foil layer, of the second aluminum foil layer, the lithium-containing positive electrode layer is coated on one side surface, close to the second aluminum foil layer, of the first aluminum foil layer, the organic-inorganic composite solid electrolyte layer and the lithium-containing positive electrode layer are bonded through a bonding agent, the first aluminum foil layer serves as a positive current collector, and the second aluminum foil layer serves as a negative current collector. The cathode-free integrated solid-state lithium battery provided by the utility model has the advantages that the interface resistance between the organic-inorganic composite solid electrolyte layer and the second aluminum foil layer is smaller, the energy density of the solid-state lithium battery is improved, and the preparation process of the solid-state lithium battery is simplified.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to the technical field of lithium batteries, in particular to an integrated solid-state lithium battery without a negative electrode.
[ background of the utility model ]
Compared with a lithium ion battery, the solid-state lithium battery based on the solid electrolyte has the characteristics of high energy density, long cycle life, safety, reliability and the like, is one of research hotspots in the field of energy storage at present, and is expected to be widely applied to the fields of electric automobiles, portable electronic equipment and the like in the future. The solid electrolyte is the core of the solid lithium battery and mainly comprises oxides, sulfides, polymers and a composite solid electrolyte. Currently, the key to the development of solid-state lithium batteries is to design and prepare a solid-state electrolyte with both high ionic conductivity and high chemical/electrochemical stability, solving the solid-solid interface problem between the solid-state electrolyte and the electrode, because the solid-state electrolyte cannot wet the positive and negative electrodes like a liquid electrolyte (Nano Energy,2017,33: 363-.
Most of the existing solid-state lithium batteries have the following layered structures: in the solid-state lithium battery with the structure, the interface resistance between the lithium metal negative electrode and the solid electrolyte is higher, and the surface of the metal lithium is easy to contact with air in the battery assembling process to generate lithium dendrites, so that the interface resistance is further increased. Therefore, it is necessary to provide an integrated solid-state lithium battery without a negative electrode to solve the above problems.
[ Utility model ] content
The utility model discloses an integrated solid-state lithium battery without a negative electrode, which omits a lithium metal negative electrode, directly adopts an aluminum foil as a negative electrode function, can effectively reduce the interface resistance between the negative electrode and a solid electrolyte, improves the energy density of the solid-state lithium battery, and simplifies the preparation process of the solid-state lithium battery.
In order to achieve the purpose, the technical scheme of the utility model is as follows:
the organic-inorganic composite solid electrolyte layer is coated on one side surface, close to the first aluminum foil layer, of the second aluminum foil layer, the lithium-containing positive electrode layer is coated on one side surface, close to the second aluminum foil layer, of the first aluminum foil layer, the organic-inorganic composite solid electrolyte layer and the lithium-containing positive electrode layer are bonded through a bonding agent, the first aluminum foil layer serves as a positive current collector, and the second aluminum foil layer serves as a negative current collector.
Preferably, the first aluminum foil layer has a thickness of 20 μm.
Preferably, the organic-inorganic electrolyte is coated to a thickness of 40 μm.
Preferably, the second aluminum foil has a thickness of 50 μm.
Preferably, the organic-inorganic composite solid electrolyte layer includes organic polymer electrolyte particles and inorganic electrolyte particles, and the inorganic electrolyte particles are 5 μm.
Compared with the prior art, the utility model provides a solid-state lithium cell of integration of no negative pole's beneficial effect lies in:
(1) the interface resistance between the organic-inorganic composite solid electrolyte layer and the negative current collector is small, so that the rate capability of the solid lithium battery is improved, the lithium metal is prevented from being exposed to air, and the formation of lithium dendrite is inhibited;
(2) the design without the negative electrode simplifies the preparation process of the solid-state lithium battery, is beneficial to industrial popularization, and simultaneously improves the energy density of the solid-state lithium battery.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
fig. 1 is a schematic diagram of a layered structure of an integrated solid-state lithium battery without a negative electrode according to the present invention.
[ detailed description ] embodiments
The following description of the present invention is provided to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention and to make the above objects, features and advantages of the present invention more comprehensible.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual values, and between the individual values may be combined with each other to yield one or more new ranges of values, which ranges of values should be considered as specifically disclosed herein.
Referring to fig. 1, the present invention provides an integrated solid-state lithium battery 100 without a negative electrode, which includes a first aluminum foil layer 1, a lithium-containing positive electrode layer 2, an organic-inorganic composite solid electrolyte layer 3, and a second aluminum foil layer 4 stacked in sequence.
The organic-inorganic composite solid electrolyte layer 3 is coated on the surface of one side, close to the first aluminum foil layer 1, of the second aluminum foil layer 4, the first aluminum foil layer 1 serves as a positive current collector, and the second aluminum foil layer 4 serves as a negative current collector. The second aluminum foil layer 4 directly serves as a negative electrode, so that a traditional lithium metal negative electrode structure is omitted, and lithium dendrites are formed when the lithium metal negative electrode is exposed in the air, so that the interface resistance is increased, and therefore compared with the prior art, the negative-electrode-free integrated solid lithium battery 100 provided by the utility model can inhibit the formation of the lithium dendrites and reduce the interface resistance between the organic-inorganic composite solid electrolyte layer 3 and the second aluminum foil layer 4.
The lithium-containing positive electrode layer 2 is coated on the surface of one side of the first aluminum foil layer 1 close to the second aluminum foil layer 4. Preferably, the thickness of the first aluminum foil layer 1 is 20 μm; the organic-inorganic electrolyte is coated to a thickness of 40 μm; the thickness of the second aluminum foil 4 is 50 μm.
The lithium-containing positive electrode layer 2 includes LiFePO4 active material, and further, the lithium-containing positive electrode layer 2 further includes LiTFSI, Super P (SP), PVDF, and SCN. The mass ratio of the components in the lithium-containing positive electrode layer 2 is LiFePO4: LiTFSI: Super P (SP) and PVDF: SCN is 10:7.5:2:1.5: 0.6.
The organic-inorganic composite solid electrolyte layer 3 and the lithium-containing positive electrode layer 2 are bonded by a bonding agent, the bonding agent is cyclized polyacrylonitrile or other derivatives, and specifically, the bonding agent is subjected to special heat treatment, and the heat treatment temperature is 250-350 ℃. By using the binder to bond the lithium-containing positive electrode layer 2 and the organic-inorganic composite solid electrolyte layer 3, a large amount of conductive carbon is not used, and irreversible capacity is reduced.
The organic-inorganic composite solid electrolyte layer 3 comprises organic polymer electrolyte particles and inorganic electrolyte particles, wherein the organic polymer electrolyte particles are EPO and LiTFSI, and the molar ratio of the organic polymer electrolyte particles to the inorganic polymer electrolyte particles is 10: 1. The inorganic electrolyte particles are LLZTO having a particle size of 5 μm, and the volume percentage of the inorganic electrolyte particles in the organic-inorganic composite solid electrolyte layer 3 is 80%.
Compared with the prior art, the utility model provides a solid-state lithium cell of integration of no negative pole's beneficial effect lies in:
(1) the interface resistance between the organic-inorganic composite solid electrolyte layer and the negative current collector is small, so that the rate capability of the solid lithium battery is improved, the lithium metal is prevented from being exposed to air, and the formation of lithium dendrite is inhibited;
(2) the design without the negative electrode simplifies the preparation process of the solid-state lithium battery, is beneficial to industrial popularization, and simultaneously improves the energy density of the solid-state lithium battery.
The embodiments of the present invention have been described in detail, but the present invention is not limited to the described embodiments. Various changes, modifications, substitutions and alterations to these embodiments will occur to those skilled in the art without departing from the spirit and scope of the present invention.
Claims (5)
1. The integrated solid-state lithium battery without the negative electrode is characterized by comprising a first aluminum foil layer, a lithium-containing positive electrode layer, an organic-inorganic composite solid electrolyte layer and a second aluminum foil layer which are sequentially stacked, wherein the organic-inorganic composite solid electrolyte layer is coated on one side surface, close to the first aluminum foil layer, of the second aluminum foil layer, the lithium-containing positive electrode layer is coated on one side surface, close to the second aluminum foil layer, of the first aluminum foil layer, the organic-inorganic composite solid electrolyte layer and the lithium-containing positive electrode layer are bonded through a bonding agent, the first aluminum foil layer serves as a positive electrode current collector, and the second aluminum foil layer serves as a negative electrode current collector.
2. The lithium non-negative integrated solid-state battery of claim 1, wherein the first aluminum foil layer has a thickness of 20 μm.
3. The non-negative integrated solid lithium battery according to claim 1, wherein the organic-inorganic composite solid electrolyte layer is coated to a thickness of 40 μm.
4. The non-negative integrated solid-state lithium battery according to claim 1, wherein the second aluminum foil has a thickness of 50 μm.
5. The non-negative integrated solid lithium battery according to claim 1, wherein the organic-inorganic composite solid electrolyte layer includes organic polymer electrolyte particles and inorganic electrolyte particles, and the inorganic electrolyte particles are 5 μm.
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| CN202122028759.9U CN215731843U (en) | 2021-08-26 | 2021-08-26 | Integrated solid-state lithium battery without negative electrode |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116613324A (en) * | 2023-07-14 | 2023-08-18 | 福建巨电新能源股份有限公司 | Secondary lithium battery without negative electrode structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116613324A (en) * | 2023-07-14 | 2023-08-18 | 福建巨电新能源股份有限公司 | Secondary lithium battery without negative electrode structure |
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