CN217562607U - Porous copper foil of negative current collector - Google Patents
Porous copper foil of negative current collector Download PDFInfo
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- CN217562607U CN217562607U CN202220841419.XU CN202220841419U CN217562607U CN 217562607 U CN217562607 U CN 217562607U CN 202220841419 U CN202220841419 U CN 202220841419U CN 217562607 U CN217562607 U CN 217562607U
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- copper foil
- increase
- aperture
- mass flow
- flow body
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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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- Battery Electrode And Active Subsutance (AREA)
Abstract
The utility model relates to a lithium ion battery field, and a porous copper foil of negative pole mass flow body is disclosed, including the copper foil, the aperture has been seted up on the copper foil, the bar groove has been seted up between the aperture, this kind of novel porous copper foil of negative pole mass flow body of being applied to can increase the surface area of original copper foil through setting up the aperture, make the battery capacity of lithium cell improve, also effectively increase the bonding effect between copper foil and the negative electrode material, also formed the whole of inseparable interlock simultaneously, along with the adhesive force increase, the situation of peeling off between coating and the mass flow body can be alleviated, be favorable to life-cycle's increase, the effectual internal resistance that has reduced, secondly can provide bigger reaction interface for the electrode reaction and carry lithium ion battery's multiplying power performance effectively.
Description
Technical Field
The utility model relates to a lithium ion battery field specifically is a porous copper foil of negative pole mass flow body.
Background
The copper foil is used as a negative electrode material in four main materials, namely a positive electrode material, a negative electrode material, a separation membrane and electrolyte for manufacturing the battery, and is a core material for current flowing; the higher production precision is generally 6 mu m at present; the copper foil is one of indispensable key materials for producing the lithium battery; the thinning is the development direction of the high-end copper foil, so that the copper foil is thinned, the endurance mileage of the lithium battery can be increased, and the method is one of the core fields of global new energy battery competition; besides being used for manufacturing lithium batteries, the lithium ion battery is also widely applied to industrial calculators, communication equipment and the like.
The capacity of the lithium battery manufactured by the existing copper foil is limited, and the contact area between the copper foil and the negative electrode material is insufficient, so that the internal resistance is high, and the rate capability of the lithium battery is poor.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The utility model provides a not enough to prior art, the utility model provides a porous copper foil of negative pole mass flow body to solve the problem that the background art provided.
(II) technical scheme
In order to achieve the above object, the utility model provides a following technical scheme: the porous copper foil of the negative current collector comprises a copper foil, wherein small holes are formed in the copper foil, and strip-shaped grooves are formed between the small holes.
Preferably, the depth of the strip-shaped groove is half of that of the copper foil.
Preferably, the apertures are oval in shape.
Preferably, the small holes are arranged in a staggered mode.
(III) advantageous effects
Compared with the prior art, the utility model discloses possess following beneficial effect:
1. this kind of novel be applied to negative pole mass flow body porous copper foil, can increase the surface area of original copper foil through setting up the aperture, make the battery capacity of lithium cell improve, also effectively increase the bonding effect that has improved between copper foil and the negative electrode material, the whole of inseparable interlock has also been formed simultaneously, along with the adhesion increase, the condition of peeling off between coating and the mass flow body can be alleviated, be favorable to life-cycle's increase, the effectual internal resistance that has reduced, secondly can provide bigger reaction interface for the electrode reaction and carry lithium ion battery's multiplying power performance effectively.
2. This kind of novel be applied to negative pole mass flow body porous copper foil, through setting up the surface area that the bar groove can further increase copper foil itself, the degree of depth that the bar groove was seted up is the half of copper foil simultaneously, sets up like this and not only can increase the surface area, can not destroy the toughness of copper foil itself yet.
Drawings
Fig. 1 is a schematic view of an overall structure of the present invention;
fig. 2 is a schematic view of the whole local amplification structure of the present invention.
In the figure: 1. copper foil; 2. a small hole; 3. a strip-shaped groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Examples
Referring to fig. 1-2, a porous copper foil for a negative current collector includes a copper foil 1, a small hole 2 is formed on the copper foil 1, and a strip-shaped groove 3 is formed between the small holes 2.
As shown in fig. 2, the groove 3 is formed to have a depth of one half of the copper foil 1, and the groove 3 is formed to have a depth of one half of the copper foil 1 so as not to deteriorate the toughness of the copper foil 1 itself, and the groove 3 further increases the surface area of the copper foil 1.
As shown in fig. 2, the apertures 2 are provided in an elliptical shape, and the elliptical shape can increase the flow velocity between the anode materials compared to a circular shape having the same radius.
As shown in fig. 2, the small holes 2 are arranged in a staggered manner, which can improve the smoothness of the negative electrode material flowing between the copper foils 1.
The working principle is as follows: when the lithium ion battery is used, the small holes 2 formed in the copper foil 1 are used for increasing the porosity, so that the surface area of the copper foil 1 is increased, the copper foil 1 can contain more negative electrode materials, the battery capacity of the lithium ion battery is improved, the contact area between the copper foil 1 and the negative electrode materials is also effectively increased, the bonding effect between the copper foil 1 and the negative electrode materials is improved, the negative electrode materials pass through gaps of the copper foil 1 after the copper foil 1 with the small holes 2 is formed, a tightly meshed whole is formed, the stripping condition between a coating and a current collector can be relieved along with the increase of adhesive force, the increase of the cycle life is facilitated, the internal resistance is effectively reduced, and a larger reaction interface can be provided for electrode reaction to effectively improve the multiplying power performance of the lithium ion battery.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a porous copper foil of negative pole mass flow body, includes copper foil (1), its characterized in that, aperture (2) have been seted up on copper foil (1), bar groove (3) have been seted up between aperture (2).
2. The negative electrode current collector porous copper foil as claimed in claim 1, wherein the depth of the strip-shaped groove (3) is set to be one-half of the copper foil (1).
3. The negative current collector porous copper foil according to claim 1, wherein the small holes (2) are arranged in an oval shape.
4. The negative electrode current collector porous copper foil according to claim 1, wherein the small holes (2) are arranged in a staggered manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220841419.XU CN217562607U (en) | 2022-04-13 | 2022-04-13 | Porous copper foil of negative current collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220841419.XU CN217562607U (en) | 2022-04-13 | 2022-04-13 | Porous copper foil of negative current collector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217562607U true CN217562607U (en) | 2022-10-11 |
Family
ID=83470501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220841419.XU Active CN217562607U (en) | 2022-04-13 | 2022-04-13 | Porous copper foil of negative current collector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217562607U (en) |
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2022
- 2022-04-13 CN CN202220841419.XU patent/CN217562607U/en active Active
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