CN103824998A - Lithium ion battery pole piece - Google Patents
Lithium ion battery pole piece Download PDFInfo
- Publication number
- CN103824998A CN103824998A CN201210462723.4A CN201210462723A CN103824998A CN 103824998 A CN103824998 A CN 103824998A CN 201210462723 A CN201210462723 A CN 201210462723A CN 103824998 A CN103824998 A CN 103824998A
- Authority
- CN
- China
- Prior art keywords
- pole piece
- lithium
- electrode material
- lithium ion
- ion 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.)
- Pending
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Classifications
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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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
- 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
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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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a lithium ion battery pole piece, which is characterized in that a conductive coating is spread between a current collector and an electrode material of the pole piece, wherein the single-face thickness of the conductive coating is 0.1 to 10 microns. Compared with a conventional lithium ion battery pole piece, the lithium ion battery pole piece has the advantages of strong binding force of the electrode material and the current collector and low pole piece resistance; a lithium battery manufactured by the pole piece is high in rate performance, low in change rate of internal resistance in a circulation process and long in cycle life.
Description
Technical field
The present invention relates to a kind of electrodes of lithium-ion batteries, belong to electrodes of lithium-ion batteries structure-design technique field.
Background technology
Existing electrodes of lithium-ion batteries is made up of collector and the electrode material that is coated in collection liquid surface.Because the collector of electrodes of lithium-ion batteries mostly is ganoid metal foil (conventionally just very aluminium foil, negative pole is Copper Foil), for making electrode material and collector reach good combination effect, must in electrode material, contain the binding agent of higher proportion; And in circulating battery process along with lithium ion constantly embeds and deviates from electrode material, the continuous dilation of electrode material volume, the combination effect of electrode material and collector worse and worse, very easily comes off from collector.Therefore the lithium ion battery of producing by existing electrodes of lithium-ion batteries, internal resistance is higher, high-rate discharge ability is poor, cyclic process internal resistance raises comparatively fast, cycle life is also poor.
Summary of the invention
Technical problem to be solved by this invention is, a kind of electrodes of lithium-ion batteries is provided, the in the situation that of containing higher proportion binding agent in not needing electrode material, also can make to reach good combination effect between electrode material and collector, make the performance such as high rate performance, cycle life of pole piece resistance, making battery improve or promote simultaneously.
For solving the problems of the technologies described above, the invention provides a kind of electrodes of lithium-ion batteries, comprise collector, be coated in the electrode material of collection liquid surface, its improvements are to be provided with conductive coating between described collector and electrode material, and the one side thickness of conductive coating is 0.1～10 μ m.
Described conductive coating is made up of one or more conductive compositions.
One side thickness is preferably 2 μ m～5 μ m.
Adopt electrodes of lithium-ion batteries of the present invention, have advantages of electrode material and pole piece collector adhesion is good, pole piece resistance is little, lithium battery good rate capability, the cyclic process internal resistance rate of change made by this pole piece be little, have extended cycle life.
Accompanying drawing explanation
Accompanying drawing is cross-sectional view of the present invention.
Embodiment
Electrodes of lithium-ion batteries provided by the invention, is made up of pole piece collector 1, the conductive coating 2 and the electrode material 3 that are coated on pole piece collector.
Described electrodes of lithium-ion batteries is in the time making, first at described pole piece collector (aluminium foil just very conventionally, negative pole is Copper Foil) upper coating one deck conductive coating, described conductive coating is the mixture of one or more conductive compositions, and dry, control the one side thickness of described conductive coating at 0.1 μ m～10 μ m, be preferably 2 μ m～5 μ m; Then coated electrode material again on the pole piece collector that applied conductive coating, makes described electrodes of lithium-ion batteries after oven dry.
The performance comparison of the battery of lithium ion battery and the existing electrodes of lithium-ion batteries making of below making for the present embodiment:
[internal resistance performance]
[high rate performance]
[cycle performance]
Visible according to above test result, electrodes of lithium-ion batteries of the present invention all has greatly improved at aspects such as internal resistance, circulation internal resistance rate of change, high rate performance and cycle performances compared with the battery of the electrodes of lithium-ion batteries made of prior art.
Electrodes of lithium-ion batteries of the present invention is by first applying one deck conductive coating before coated electrode material on pole piece collector, can effectively increase the adhesion between electrode material and pole piece collector, and can suitably reduce the content of binding agent in electrode material, thereby internal resistance, circulation internal resistance rate of change, high rate performance and the cycle performance etc. that can make to make battery improve.
Claims (2)
1. an electrodes of lithium-ion batteries, comprises collector, is coated in the electrode material of collection liquid surface, it is characterized in that being provided with conductive coating between described collector and electrode material, and the one side thickness of conductive coating is 0.1～10 μ m.
2. electrodes of lithium-ion batteries according to claim 1, is characterized in that: the one side thickness of described conductive coating is 2～5 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210462723.4A CN103824998A (en) | 2012-11-16 | 2012-11-16 | Lithium ion battery pole piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210462723.4A CN103824998A (en) | 2012-11-16 | 2012-11-16 | Lithium ion battery pole piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103824998A true CN103824998A (en) | 2014-05-28 |
Family
ID=50759941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210462723.4A Pending CN103824998A (en) | 2012-11-16 | 2012-11-16 | Lithium ion battery pole piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103824998A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113929188A (en) * | 2020-06-29 | 2022-01-14 | 佛山市顺德区美的饮水机制造有限公司 | Electrode structure, purification structure and electrode preparation method |
| CN114074981A (en) * | 2020-08-12 | 2022-02-22 | 云米互联科技(广东)有限公司 | Electric deionization water purification device and household water purification device |
-
2012
- 2012-11-16 CN CN201210462723.4A patent/CN103824998A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113929188A (en) * | 2020-06-29 | 2022-01-14 | 佛山市顺德区美的饮水机制造有限公司 | Electrode structure, purification structure and electrode preparation method |
| CN114074981A (en) * | 2020-08-12 | 2022-02-22 | 云米互联科技(广东)有限公司 | Electric deionization water purification device and household water purification device |
| CN114074981B (en) * | 2020-08-12 | 2024-03-19 | 云米互联科技(广东)有限公司 | Electrodeionization water purification device and household water purification device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140528 |