CN105406085A - Lithium battery copper foil pole piece and preparation method thereof - Google Patents
Lithium battery copper foil pole piece and preparation method thereof Download PDFInfo
- Publication number
- CN105406085A CN105406085A CN201510851562.1A CN201510851562A CN105406085A CN 105406085 A CN105406085 A CN 105406085A CN 201510851562 A CN201510851562 A CN 201510851562A CN 105406085 A CN105406085 A CN 105406085A
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- Prior art keywords
- copper foil
- lithium battery
- pole piece
- mixture
- sputtering
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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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/665—Composites
- H01M4/667—Composites in the form of layers, e.g. coatings
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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
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0421—Methods of deposition of the material involving vapour deposition
- H01M4/0423—Physical vapour deposition
- H01M4/0426—Sputtering
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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
-
- 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
- H01M4/139—Processes of manufacture
-
- 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)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Composite Materials (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention belongs to a lithium battery copper foil pole piece and a preparation method thereof, and belongs to the field of the lithium battery. According to the technical scheme adopted by the invention, the lithium battery copper foil pole piece is characterized in that the surface of the copper foil is covered with a mixture of indium tin oxide and carbon; the covering layer is 3-5um in thickness; and the indium tin oxide accounts for 93-95% of the mixture in percentage by mass. A flame-retardant and conductive sputtering material is added between a negative electrode active substance and the copper foil; when the negative active substance is burnt, the copper foil is prevented from being ignited on the premise of not influencing the electrochemical performance of the lithium battery so as to reduce the combustion intensity of the lithium battery and to further improve the safety performance of the lithium battery.
Description
Technical field
The invention belongs to lithium battery Copper Foil pole piece and preparation method thereof, belong to field of lithium.
Technical background
The electronic information epoch make to increase fast the demand of portable power source.Due to lithium battery there is memory-less effect, the advantage such as voltage is high, energy density is large, long service life, make it be with a wide range of applications in fields such as portable electric appts, electric automobile, space technologies, become the study hotspot paid close attention in recent years.
In recent years, the security incident that lithium battery causes is increasing, such as make a phone call when within 2013, people has people to make a phone call when i Phone charges to cause electric leakage clicked lethal, within 2011, one, Hangzhou electric taxi burns, and accidents caused reason is lithium battery.The security performance how effectively improving lithium battery becomes the emphasis of current research.
Summary of the invention
The object of this invention is to provide a kind of lithium battery Copper Foil pole piece and preparation method thereof, lithium battery protection Copper Foil when burning not being ignited, reducing lithium battery in combustion intensity, thus improving the security performance of lithium battery.
For achieving the above object, the technical solution used in the present invention is: lithium battery Copper Foil pole piece, is characterized in that, covers the mixture of tin indium oxide and carbon on the surface of Copper Foil, the thickness covering layer is 3-5um, and the mass percent that described tin indium oxide accounts for mixture is 93%-95%.
As preferably, the thickness covering layer is 3um.
The preparation method of lithium battery Copper Foil pole piece, comprises the following steps: will wait that clean surface in methyl alcohol inserted by the Copper Foil covering layer, then vacuumize under 50 DEG C of conditions;
Under vacuum, with the mixture of tin indium oxide and carbon for sputtering target, Copper Foil is sputtering base material, is splashed on Copper Foil by the mixture of tin indium oxide and carbon;
Copper Foil after above-mentioned sputtering mixture is carried out roll-in and obtain satisfactory Copper Foil pole piece to the parameter needed.
As preferably, the Vacuum Pressure negative pressure in sputtering operation is 1 × 10
-3pa-2 × 10
-3pa, the frequency of the radio-frequency power supply of sputtering is 11-12MHz, and voltage is 1-1.1KV.
As further preferred, the Vacuum Pressure negative pressure in sputtering operation is 1 × 10
-3pa, the frequency of the radio frequency electrical power supply of sputtering is 11MHz, and voltage is 1KV.
As preferably, the Vacuum Pressure negative pressure in sputtering operation is 2 × 10
-3pa, the frequency of the radio frequency electrical power supply of sputtering is 12MHz, and voltage is 1.1KV.
The invention has the advantages that: by impurity such as the oil stains of Copper Foil clean surface in methyl alcohol, then vacuumize under 50 DEG C of conditions, is beneficial to next step sputtering operation.After having sputtered, twin rollers extrudes, make the mixture of tin indium oxide and carbon be combined tightr with matrix Copper Foil.
By increase between negative electrode active material and Copper Foil one deck fire-retardant and conduction sputter material; under the prerequisite not affecting lithium battery chemical property, when negative electrode active material burns, protection Copper Foil is not ignited; reduce lithium battery combustion intensity, thus improve the security performance of lithium battery.
Accompanying drawing explanation
Fig. 1 is lithium battery copper foil structure schematic diagram of the present invention.
Fig. 2 is the internal resistance comparison diagram of the battery prepared of the Copper Foil of the mixture covering tin indium oxide and carbon in the present invention and common Copper Foil battery.
Reference numeral: 1, the mixture of tin indium oxide and carbon, 2, Copper Foil.
Embodiment
Lithium battery Copper Foil pole piece as shown in the figure, covers the mixture of tin indium oxide and carbon on the surface of Copper Foil, and the thickness covering layer is 3-5um, and the mass percent that described tin indium oxide accounts for mixture is 93%-95%, and the thickness covering layer is 3um.
The preparation method of lithium battery Copper Foil pole piece, will wait that clean surface in methyl alcohol inserted by the Copper Foil covering layer, then vacuumize under 50 DEG C of conditions; Under vacuum, with the mixture of tin indium oxide and carbon for sputtering target, Copper Foil is sputtering base material, is splashed on Copper Foil by the mixture of tin indium oxide and carbon; Copper Foil after above-mentioned sputtering mixture is carried out roll-in and obtain satisfactory Copper Foil pole piece to the parameter needed.
Vacuum Pressure negative pressure in sputtering operation is 1 × 10
-3pa-2 × 10
-3pa, the frequency of the radio-frequency power supply of sputtering is 11-12MHz, and voltage is 1-1.1KV.
Example example 1
By impurity such as the oil stains of Copper Foil clean surface in methyl alcohol, then vacuumize under 50 DEG C of conditions.With the mixture of tin indium oxide and carbon for sputtering target, metal copper foil is sputtering base material, and vacuum cavity is evacuated down to 1 × 10
-3pa, the frequency of radio frequency electrical power supply is 11MHz, and voltage is 1KV.Sputter rear taking-up.After having sputtered, twin rollers extrudes.
Adopt above-mentioned technique to prepare the surperficial Copper Foil covering the mixture of tin indium oxide and carbon, the thickness covering the mixture of tin indium oxide and carbon is 3um.The Copper Foil adopting the present embodiment to prepare respectively and common Copper Foil are as cathode of lithium battery collector, and other techniques are consistent, make lithium battery.At identical conditions, extrusion experiment is carried out to battery.Show that experimental result is: lithium battery batteries caught fire when deflection two is 2/5ths of common Copper Foil, ignition time 15s; The Copper Foil prepared of the present embodiment when deflection be two/batteries caught fire for the moment, ignition time 10s.Result can show that the security performance of the lithium battery of the Copper Foil of this embodiment practical is improved by experiment.
Embodiment 2
By impurity such as the oil stains of Copper Foil clean surface in methyl alcohol, then vacuumize under 50 DEG C of conditions.With the mixture of tin indium oxide and carbon for sputtering target, metal copper foil is sputtering base material, and vacuum cavity is evacuated down to 2 × 10
-3pa, the frequency of radio frequency electrical power supply is 12MHz, and voltage is 1.1KV.Sputter rear taking-up.After having sputtered, twin rollers extrudes.
Adopt above-mentioned technique to prepare the surperficial Copper Foil covering the mixture of tin indium oxide and carbon, the thickness covering the mixture of tin indium oxide and carbon is 5um.The Copper Foil adopting the present embodiment to prepare respectively and common Copper Foil are as cathode of lithium battery collector, and other techniques are consistent, make lithium battery.At identical conditions, test the internal resistance of two kinds of batteries respectively, the results are shown in accompanying drawing 2.
Can be drawn by Fig. 2, the lithium battery adopting the Copper Foil of the present embodiment to make is identical with the internal resistance of the lithium battery of common Copper Foil, can show that the chemical property of this invention on lithium battery does not affect.
Claims (6)
1. a lithium battery Copper Foil pole piece, is characterized in that, covers the mixture of tin indium oxide and carbon on the surface of Copper Foil, and the thickness covering layer is 3-5um, and the mass percent that described tin indium oxide accounts for mixture is 93%-95%.
2. lithium battery Copper Foil pole piece according to claim 1, is characterized in that, the thickness covering layer is 3um.
3. a preparation method for the lithium battery Copper Foil pole piece described in claim 1 or 2, is characterized in that: will wait that clean surface in methyl alcohol inserted by the Copper Foil covering layer, then vacuumize under 50 DEG C of conditions;
Under vacuum, with the mixture of tin indium oxide and carbon for sputtering target, Copper Foil is sputtering base material, is splashed on Copper Foil by the mixture of tin indium oxide and carbon;
Copper Foil after above-mentioned sputtering mixture is carried out roll-in and obtain satisfactory Copper Foil pole piece to the parameter needed.
4. the preparation method of lithium battery Copper Foil pole piece according to claim 3, is characterized in that, the Vacuum Pressure negative pressure in above-mentioned sputtering operation is 1 × 10
-3pa-2 × 10
-3pa, the frequency of the radio-frequency power supply of sputtering is 11-12MHz, and voltage is 1-1.1KV.
5. the preparation method of lithium battery Copper Foil pole piece according to claim 4, is characterized in that, the Vacuum Pressure negative pressure in above-mentioned sputtering operation is 1 × 10
-3pa, the frequency of the radio frequency electrical power supply of sputtering is 11MHz, and voltage is 1KV.
6. the preparation method of lithium battery Copper Foil pole piece according to claim 4, is characterized in that, the Vacuum Pressure negative pressure in above-mentioned sputtering operation is 2 × 10
-3pa, the frequency of the radio frequency electrical power supply of sputtering is 12MHz, and voltage is 1.1KV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510851562.1A CN105406085A (en) | 2015-11-30 | 2015-11-30 | Lithium battery copper foil pole piece and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510851562.1A CN105406085A (en) | 2015-11-30 | 2015-11-30 | Lithium battery copper foil pole piece and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN105406085A true CN105406085A (en) | 2016-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510851562.1A Pending CN105406085A (en) | 2015-11-30 | 2015-11-30 | Lithium battery copper foil pole piece and preparation method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10308222A (en) * | 1997-05-07 | 1998-11-17 | Nippon Glass Fiber Co Ltd | Positive electrode for lithium secondary battery, and lithium secondary battery using thereof |
| JPH11250900A (en) * | 1998-02-26 | 1999-09-17 | Sony Corp | Manufacture and manufacturing device for electrode for nonaqueous electrolyte secondary battery, electrode, and electrolyte secondary battery using its electrode |
| US20050118504A1 (en) * | 2003-11-27 | 2005-06-02 | Matsushita Electric Industrial Co., Ltd. | Energy device and method for producing the same |
| CN101958418A (en) * | 2010-03-04 | 2011-01-26 | 常德力元新材料有限责任公司 | Electrode current collector material of lithium ion battery and preparation method thereof |
| CN102037592A (en) * | 2008-05-22 | 2011-04-27 | 丰田自动车株式会社 | Secondary-battery current collector foil and method of manufacturing the same |
| CN103996858A (en) * | 2014-05-29 | 2014-08-20 | 山东神工海特电子科技有限公司 | Lithium ion battery negative electrode current collector material and preparation method |
-
2015
- 2015-11-30 CN CN201510851562.1A patent/CN105406085A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10308222A (en) * | 1997-05-07 | 1998-11-17 | Nippon Glass Fiber Co Ltd | Positive electrode for lithium secondary battery, and lithium secondary battery using thereof |
| JPH11250900A (en) * | 1998-02-26 | 1999-09-17 | Sony Corp | Manufacture and manufacturing device for electrode for nonaqueous electrolyte secondary battery, electrode, and electrolyte secondary battery using its electrode |
| US20050118504A1 (en) * | 2003-11-27 | 2005-06-02 | Matsushita Electric Industrial Co., Ltd. | Energy device and method for producing the same |
| CN102037592A (en) * | 2008-05-22 | 2011-04-27 | 丰田自动车株式会社 | Secondary-battery current collector foil and method of manufacturing the same |
| CN101958418A (en) * | 2010-03-04 | 2011-01-26 | 常德力元新材料有限责任公司 | Electrode current collector material of lithium ion battery and preparation method thereof |
| CN103996858A (en) * | 2014-05-29 | 2014-08-20 | 山东神工海特电子科技有限公司 | Lithium ion battery negative electrode current collector material and preparation method |
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Application publication date: 20160316 |
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