CN208923269U - The lithium ion cell electrode structure of high-specific surface area - Google Patents
The lithium ion cell electrode structure of high-specific surface area Download PDFInfo
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- CN208923269U CN208923269U CN201821494905.9U CN201821494905U CN208923269U CN 208923269 U CN208923269 U CN 208923269U CN 201821494905 U CN201821494905 U CN 201821494905U CN 208923269 U CN208923269 U CN 208923269U
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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
Abstract
The utility model is the lithium ion cell electrode structure of high-specific surface area.Its opposite face of positive/negative plate is spacedly distributed respectively in electrode structure the positive electrode fin that cross section is tooth form and the electrode coating that negative electrode material fin is constituted, the cross section is that its top of the fin of tooth form has circular arc, it is fin its tooth form cross-sectional shape of positive/negative plate distribution, in the same size, fin interval is equal, positive electrode fin and the mutual peak valley pairing of negative electrode material fin, wherein, the coating surface that the negative electrode material fin of negative plate is constituted is equipped with the diaphragm being bonded with it.The utility model have processing cost it is low, suitable for prepare miniature small size, height ratio capacity, high rate capability lithium ion battery outstanding advantages.
Description
Technical field
The utility model belongs to lithium ion battery, and in particular to a kind of lithium ion cell electrode structure of high-specific surface area.
Background technique
The so-called lithium ion cell electrode of the utility model includes pole plate and the electrode activity coating for being attached to the pole plate.
The energy density of lithium ion battery is mainly related with the thickness of electrode activity coating, and the coating layer thickness the thick, can store
The quantity of lithium ion is also more, and the energy density of battery can correspondingly increase.And power density is mainly moved with the lithium ion of battery
Shifting rate is related, and the distance between thicker positive and negative anodes of electrode activity coating are remoter, will affect the migration rate of lithium ion and cause
Power density decline.The electrode coating of conventional lithium ion battery is that two dimension accumulation is constituted, and is definite value in its slurry thickness and area
In the case where the specific surface area of electrode coating be substantially fixed value and be difficult to improve.
As it can be seen that energy density and power density are conflicts in two-dimentional battery, in order to obtain high comprehensive performance
Lithium ion battery, it is necessary to balancing battery energy density and power density, so the concept and products thereof of three-dimensional lithium junction battery is met the tendency of
And it gives birth to.
Lithium ion cell electrode coating uses three-dimensional structure, it can be achieved that not influencing while promoting the energy density of battery
Power density is common recognition in the industry, at present three-diemsnional electrode coating structure design in just like column staggered array type, sheet alternating expression,
The lithium ion diffusion length of concentric arry formula and random concentric type etc., these structure types will not be with the increase of thickness of electrode
And increase, therefore power density is not reduced while increasing energy density theoretically, but because these structures are excessively complicated, therefore
It is difficult to apply in production.
Summary of the invention
Purpose of the utility model is to solve the electrode coating of the existing three-dimensional structure of lithium ion battery structure is complicated still
The technical issues of not applying in production, and propose a kind of lithium ion cell electrode structure of high-specific surface area.
The utility model takes following technical scheme to achieve the above object: the lithium ion cell electrode knot of high-specific surface area
Structure, including positive/negative plate, are characterized in, its opposite face of positive/negative plate be spacedly distributed respectively have cross section be tooth form positive electrode
The electrode coating that fin and negative electrode material fin are constituted, the cross section are that its top of the fin of tooth form has circular arc, positive and negative anodes
Fin its tooth form cross-sectional shape of plate distribution, in the same size, fin interval is equal, positive electrode fin and negative electrode material fin
Mutual peak valley pairing, wherein the coating surface that the negative electrode material fin of negative plate is constituted is equipped with the diaphragm being bonded with it.
Height at the top of the positive or negative polar board surface to fin circular arc is 50 μm -500 μm, the distance between at the top of circular arc
It is 100 μm -500 μm.
The positive plate is made of foamed aluminium, and negative plate is made of foam copper.
The beneficial effects of the utility model and advantage are: this electrode structure its high ratio compared with existing two-dimensional electrode structure
The characteristics of surface area be it will be apparent that compared with disclosed three-diemsnional electrode structure its structure feature easy to process be also it is aobvious and
It is clear to.This electrode structure is particularly suited for using low temperature direct write 3D printing technique and application easy to produce, especially in low temperature -10
Being printed under conditions of to -20 degrees Celsius becomes solid-state for organic solvent and deionized water and reduces loss, is conducive to freeze
Drying forms porous electrode coating.Flowing or deflection due to the positive and negative pole material slurry of this electrode structure is equal, beats
All fins after print can generate consistent micro-deformation and can guarantee the reliability of this electrode structure, so-called micro-deformation packet
Include the circular arc formed at the top of the fin that cross section is tooth form.If the electrode plate of this electrode structure is higher using surface roughness
The fin attachment that its positive and negative pole material of foam copper and foamed aluminium is constituted is stronger.Tab is set in this electrode structure and is packaged in
Shell, injection electrolyte can become monomer lithium ion battery.The utility model is with processing cost is low, it is miniature to be suitable for preparing
Small size, height ratio capacity, high rate capability lithium ion battery outstanding advantages.
Detailed description of the invention
Attached drawing 1 is this electrode structure embodiments structural schematic diagram.
In attached drawing: 1 positive plate, 1-1 positive electrode fin, 2 negative plates, 2-1 negative electrode material fin, 3 diaphragms.
Specific embodiment
The utility model is further illustrated below with reference to embodiment and attached drawing.
Embodiment as shown in Figure 1, the opposite face difference for the negative plate 2 that the positive plate 1 and foam copper that foamed aluminium is constituted are constituted
The electrode coating being made of positive electrode fin 1-1 and negative electrode material fin 2-1 that the cross section being spacedly distributed is tooth form.
The cross section is that its top the positive electrode fin 1-1 and negative electrode material fin 2-1 of tooth form has circular arc, positive and negative
Fin its tooth form cross-sectional shape of pole plate distribution, in the same size, fin interval is equal.
The mutual peak valley pairing of positive electrode fin 1-1 and negative electrode material fin 2-1, the negative electrode material fin 2-1 of negative plate 2
The coating surface of composition is equipped with the diaphragm 3 being bonded with it.Due to having circular arc, the positive electrode of peak valley pairing at the top of fin
There is the gap for accommodating electrolyte between fin 1-1 and negative electrode material fin 1-2.
Height at the top of the positive or negative polar board surface to fin circular arc is 50 μm -500 μm, the distance between at the top of circular arc
It is 100 μm -500 μm, size is determined according to battery capacity.
The utility model constitutes its tooth form cross-sectional shape, in the same size, fin interval phase using the 3D printing of low temperature direct write
Deng positive electrode fin 1-1 and negative electrode material fin 2-1, since there are equal flowings or deformation for positive and negative pole material slurry
Amount, therefore its deforming tops of fin that positive/negative plate is distributed after printing form circular arc.
The lithium ion cell electrode structure of above-mentioned high-specific surface area can be applied to lithium ion battery cell, through conductive gluing
Connecing fixed tab, cell package, being filled with electrolyte is monomer lithium ion battery.
Claims (2)
1. the lithium ion cell electrode structure of high-specific surface area, including positive/negative plate, it is characterised in that: its opposite face of positive/negative plate
Being spacedly distributed respectively has the positive electrode fin that cross section is tooth form and the electrode coating that negative electrode material fin is constituted, the cross
Section is that its top of the fin of tooth form has a circular arc, fin its tooth form cross-sectional shape of positive/negative plate distribution, in the same size, convex
Rib interval is equal, positive electrode fin and the mutual peak valley pairing of negative electrode material fin, wherein the negative electrode material fin structure of negative plate
At coating surface be equipped with the diaphragm that is bonded with it, the height at the top of the positive or negative polar board surface to fin circular arc is 50 μm-
500 μm, the distance between circular arc top is 100 μm -500 μm.
2. lithium ion cell electrode structure according to claim 1, it is characterised in that: the positive plate is by foamed aluminium structure
At negative plate is made of foam copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821494905.9U CN208923269U (en) | 2018-09-13 | 2018-09-13 | The lithium ion cell electrode structure of high-specific surface area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821494905.9U CN208923269U (en) | 2018-09-13 | 2018-09-13 | The lithium ion cell electrode structure of high-specific surface area |
Publications (1)
| Publication Number | Publication Date |
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| CN208923269U true CN208923269U (en) | 2019-05-31 |
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| CN201821494905.9U Active CN208923269U (en) | 2018-09-13 | 2018-09-13 | The lithium ion cell electrode structure of high-specific surface area |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109309193A (en) * | 2018-09-13 | 2019-02-05 | 深圳光韵达机电设备有限公司 | The lithium ion cell electrode structure and its processing method of high-specific surface area and application |
| CN113036233A (en) * | 2019-12-09 | 2021-06-25 | 中国科学院大连化学物理研究所 | Zinc-based single cell electrode structure and application |
-
2018
- 2018-09-13 CN CN201821494905.9U patent/CN208923269U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109309193A (en) * | 2018-09-13 | 2019-02-05 | 深圳光韵达机电设备有限公司 | The lithium ion cell electrode structure and its processing method of high-specific surface area and application |
| CN113036233A (en) * | 2019-12-09 | 2021-06-25 | 中国科学院大连化学物理研究所 | Zinc-based single cell electrode structure and application |
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