CN107256970A - A kind of processing method of lithium ion battery base band - Google Patents
A kind of processing method of lithium ion battery base band Download PDFInfo
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- CN107256970A CN107256970A CN201710439969.2A CN201710439969A CN107256970A CN 107256970 A CN107256970 A CN 107256970A CN 201710439969 A CN201710439969 A CN 201710439969A CN 107256970 A CN107256970 A CN 107256970A
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- Prior art keywords
- base band
- passed
- quartz pipe
- battery base
- gas
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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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/663—Selection of materials containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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 invention discloses a kind of processing method of lithium ion battery base band, belong to electrochemical technology field.This method comprises the following steps：(1) battery base band is placed in quartz pipe by, and inert gas is passed through into the quartz pipe, while the quartz pipe is heated up, stops being passed through inert gas when the quartz pipe is warming up to cracking temperature；(2) stops being passed through after inert gas, and cracked gas is passed through into the quartz pipe, and cracking reaction occurs for the cracked gas, stops being passed through cracked gas after 5~7 hours, obtains the base band of Surface Creation carbon-coating.This method shows one layer of uniform carbon-coating of generation using cracking mode in base band, and because it introduces the organic gel of insulation on base band surface, undope non-conductive material so that battery conductive performance obtains higher lifting；And the processing method, in base band Surface Creation carbon-coating, because cracking reaction speed is slow, is easily controlled using cracking mode, therefore uniform in the carbon layers having thicknesses of base band Surface Creation.
Description
Technical field
The present invention relates to electrochemical technology field, a kind of processing method of lithium ion battery base band is particularly related to.
Background technology
Lithium ion battery is the secondary chemical-electrical of the repeatable discharge and recharge most with prospects of people's accreditation so far
Source, it has the energy density more much higher than Cd-Ni secondary battery and lead-acid battery, and with less energy density per unit volume, battery
Inside, without the element to environment with severe contamination, is one of electrochmical power source system of current people's most study, is had very well
Development prospect.
In the base band of lithium ion battery first, positive pole aluminium foil is easily aoxidized, the fine and close oxide layer of Surface Creation, causes to lead
Electrically it is deteriorated；Although negative copper foil oxidation is slower, in storage electric process, if overlong time, can also there is certain journey
The oxidation of degree, because the presence of oxide layer, causes high-rate battery discharge poor performance.
Traditional processing method is one layer of conductive carbon of coating in base band, and specific method is to press conductive carbon with CMC, water
Ratio is well mixed, and can't see obvious particle, then is uniformly scraped slurry on aluminium foil with scraper, is dried, is obtained coating conductive
The aluminium foil of layer, although battery conductive can be improved, but have the presence of part organic gel in conductive carbon layer, and organic gel is insulation
Body, makes high-rate battery discharge performance boost relatively low.
The content of the invention
In view of this, it is an object of the invention to propose not having in a kind of processing method of lithium ion battery base band, this method
Have and introduce the organic gel of insulation on base band surface, increase substantially high-rate battery discharge performance.
A kind of processing method of the lithium ion battery base band provided based on the above-mentioned purpose present invention, is comprised the following steps：
(1) battery base band is placed in quartz pipe by, and inert gas is passed through into the quartz pipe, while will be described
Quartz pipe heats up, and stops being passed through inert gas when the quartz pipe is warming up to cracking temperature；
(2) stops being passed through after inert gas, and cracked gas is passed through into the quartz pipe, and the cracked gas occurs
Cracking reaction, stops being passed through cracked gas after 5~7 hours, obtains the base band of Surface Creation carbon-coating.
Preferably, the battery base band in the step (1) is positive battery base band.
Preferably, the battery base band in the step (1) is negative battery base band.
Preferably, the battery base band in the step (1) is positive battery base band and negative battery base band.
Preferably, the speed that is passed through of inert gas is 3~8ml/s in the step (1), and the inert gas is nitrogen.
Preferably, cracking temperature is 600~700 DEG C in the step (1).
Preferably, the speed that is passed through of cracked gas is 3~8ml/s in the step (2)；The cracked gas be acetylene or
Ethene.
Crack temperature range in the step (1) is 600~700 DEG C, if cracking temperature is less than 600 DEG C, nothing
Cracking reaction occurs for method；If cracking temperature is higher than 700 DEG C, cracking reaction is too fast, it is impossible to equal control thickness.
The velocity interval that is passed through of inert gas is 3~8ml/s in the step (1), due to quartz pipe gas discharge end
Flue be insertion water in, when speed be less than 3ml/l when, it is impossible to see bubbling in water, it is impossible to determine whether gas lead to
Cross, when speed is higher than 8ml/s, even if there is the phenomenon of gas leakage elsewhere, it can be seen that bubbling in the water of rear end, it is impossible to which investigation is
It is no to have gas leakage elsewhere.
The velocity interval that is passed through of cracked gas is 3~8ml/s, the hydrogen generated due to cracking reaction in the step (2)
Discharged via the flue of quartz pipe gas discharge end, the flue of quartz pipe gas discharge end is inserted in water, when
When speed is less than 3ml/l, it is impossible to see bubbling in water, it is impossible to determine whether that gas passes through, when speed is higher than 8ml/s, i.e.,
Make the phenomenon for having gas leakage elsewhere, it can be seen that bubbling in the water of rear end, it is impossible to which whether investigation has gas leakage elsewhere.
Cracked gas is passed through into quartz pipe, the air in quartz pipe can be effectively removed, prevent from being passed through cracking gas
By the dioxygen oxidation in air during body, so as to cause the security incidents such as burning.
From the above it can be seen that the advantages of the present invention are：
(1) processing method for the lithium ion battery base band that the present invention is provided, generation one is shown using cracking mode in base band
The uniform carbon-coating of layer, because it does not introduce the organic gel of insulation on base band surface, undope non-conductive material so that battery conductive
Performance obtains higher lifting.
(2) processing method for the lithium ion battery base band that the present invention is provided, using cracking mode in base band Surface Creation carbon
Layer, because cracking reaction speed is slow, is easily controlled, therefore uniform in the carbon layers having thicknesses of base band Surface Creation.
(3) processing method for the lithium ion battery base band that the present invention is provided, simple to operate, convenient and swift, cost-effective, raw
Efficiency high is produced, be particularly suitable for use in factorial praluction.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with specific embodiment, to this hair
It is bright to be further described.
Embodiment 1
Positive battery base band is placed in quartz pipe, is then blocked at quartz pipe two ends and in two ends Ge Liuyi holes, will
Two flues are inserted in the holes of left and right respectively, wherein a flue is passed through end as gas, another flue is used as gas
Body outlet side；Quartz pipe is put into reacting furnace, being passed through end via gas is passed through nitrogen and while heat up quartz pipe, nitrogen
Speed is passed through for 3ml/s, the nitrogen being passed through is discharged by being passed through after quartz pipe by gas discharge end；When the temperature in quartz pipe
When reaching 600 DEG C, stopping is passed through nitrogen；End is passed through via gas and is passed through acetylene, and acetylene is passed through speed for 5ml/s, the second being passed through
Cracking reaction occurs in quartz pipe for alkynes, and cracking reaction generates hydrogen and in base band Surface Creation solid carbon, the hydrogen of generation
Discharged via gas discharge end, stop being passed through acetylene after 6 hours, and stop heating, cooling obtains the positive pole of Surface Creation carbon-coating
Battery base band.
Through measurement, the positive battery base band carbon layer on surface average thickness is 2 microns, and base band shows that integral thickness is uniform.
The positive battery base band and the negative battery base band handled without same procedure are fabricated to battery, battery is tested
20C discharge capacities, it is 85% to obtain battery 20C discharge capacities.
Embodiment 2
Negative battery base band is placed in quartz pipe, is then blocked at quartz pipe two ends and in two ends Ge Liuyi holes, will
Two flues are inserted in the holes of left and right respectively, wherein a flue is passed through end as gas, another flue is used as gas
Body outlet side；Quartz pipe is put into reacting furnace, being passed through end via gas is passed through nitrogen and while heat up quartz pipe, nitrogen
Speed is passed through for 8ml/s, the nitrogen being passed through is discharged by being passed through after quartz pipe by gas discharge end；When the temperature in quartz pipe
When reaching 700 DEG C, stopping is passed through nitrogen；End is passed through via gas and is passed through ethene, and ethene is passed through speed for 3ml/s, the second being passed through
Cracking reaction occurs in quartz pipe for alkene, and cracking reaction generates hydrogen and in base band Surface Creation solid carbon, the hydrogen of generation
Discharged via gas discharge end, stop being passed through ethene after 6 hours, and stop heating, cooling obtains the negative pole of Surface Creation carbon-coating
Battery base band.
Through measurement, the negative battery base band carbon layer on surface average thickness is 2.5 microns, and base band shows that integral thickness is equal
It is even.
The negative battery base band and the positive battery base band handled without same procedure are fabricated to battery, battery is tested
20C discharge capacities, it is 89% to obtain battery 20C discharge capacities.
Embodiment 3
Positive battery base band is placed in quartz pipe, is then blocked at quartz pipe two ends and in two ends Ge Liuyi holes, will
Two flues are inserted in the holes of left and right respectively, wherein a flue is passed through end as gas, another flue is used as gas
Body outlet side；Quartz pipe is put into reacting furnace, being passed through end via gas is passed through nitrogen and while heat up quartz pipe, nitrogen
Speed is passed through for 5ml/s, the nitrogen being passed through is discharged by being passed through after quartz pipe by gas discharge end；When the temperature in quartz pipe
When reaching 700 DEG C, stopping is passed through nitrogen；End is passed through via gas and is passed through ethene, and ethene is passed through speed for 8ml/s, the second being passed through
Cracking reaction occurs in quartz pipe for alkene, and cracking reaction generates hydrogen and in base band Surface Creation solid carbon, the hydrogen of generation
Discharged via gas discharge end, stop being passed through ethene after 5 hours, and stop heating, cooling obtains the positive pole of Surface Creation carbon-coating
Battery base band.
Through measurement, the positive battery base band carbon layer on surface average thickness is 3 microns, and base band shows that integral thickness is uniform.
The positive battery base band and the negative battery base band handled without same procedure are fabricated to battery, battery is tested
20C discharge capacities, it is 91% to obtain battery 20C discharge capacities.
Embodiment 4
Negative battery base band is placed in quartz pipe, is then blocked at quartz pipe two ends and in two ends Ge Liuyi holes, will
Two flues are inserted in the holes of left and right respectively, wherein a flue is passed through end as gas, another flue is used as gas
Body outlet side；Quartz pipe is put into reacting furnace, being passed through end via gas is passed through nitrogen and while heat up quartz pipe, nitrogen
Speed is passed through for 8ml/s, the nitrogen being passed through is discharged by being passed through after quartz pipe by gas discharge end；When the temperature in quartz pipe
When reaching 600 DEG C, stopping is passed through nitrogen；End is passed through via gas and is passed through acetylene, and acetylene is passed through speed for 3ml/s, the second being passed through
Cracking reaction occurs in quartz pipe for alkynes, and cracking reaction generates hydrogen and in base band Surface Creation solid carbon, the hydrogen of generation
Discharged via gas discharge end, stop being passed through acetylene after 7 hours, and stop heating, cooling obtains the negative pole of Surface Creation carbon-coating
Battery base band.
Through measurement, the negative battery base band carbon layer on surface average thickness is 2.7 microns, and base band shows that integral thickness is equal
It is even.
The negative battery base band and the positive battery base band handled without same procedure are fabricated to battery, battery is tested
20C discharge capacities, it is 90% to obtain battery 20C discharge capacities.
Embodiment 5
Negative battery base band is placed in quartz pipe, is then blocked at quartz pipe two ends and in two ends Ge Liuyi holes, will
Two flues are inserted in the holes of left and right respectively, wherein a flue is passed through end as gas, another flue is used as gas
Body outlet side；Quartz pipe is put into reacting furnace, being passed through end via gas is passed through nitrogen and while heat up quartz pipe, nitrogen
Speed is passed through for 6ml/s, the nitrogen being passed through is discharged by being passed through after quartz pipe by gas discharge end；When the temperature in quartz pipe
When reaching 650 DEG C, stopping is passed through nitrogen；End is passed through via gas and is passed through ethene, and ethene is passed through speed for 6ml/s, the second being passed through
Cracking reaction occurs in quartz pipe for alkene, and cracking reaction generates hydrogen and in base band Surface Creation solid carbon, the hydrogen of generation
Discharged via gas discharge end, stop being passed through ethene after 6.5 hours, and stop heating, cooling obtains the negative of Surface Creation carbon-coating
Pole battery base band.
Through measurement, the negative battery base band carbon layer on surface average thickness is 2.3 microns, and base band shows that integral thickness is equal
It is even.
The negative battery base band and the positive battery base band handled without same procedure are fabricated to battery, battery is tested
20C discharge capacities, it is 92% to obtain battery 20C discharge capacities.
Embodiment 6
Positive battery base band and negative battery base band are respectively placed in quartz pipe, then by two quartz pipe two ends
Block and in two ends Ge Liuyi holes, two flues are inserted in the holes of left and right respectively, wherein a flue is used as gas respectively
Body is passed through end, and another flue is used as gas discharge end；Two quartz pipes are put into reacting furnace, respectively via gas
It is passed through end and is passed through nitrogen and the quartz pipe that heats up simultaneously, it is 4ml/s that nitrogen, which is passed through speed, and the nitrogen being passed through passes through quartz pipe
Discharged by by gas discharge end；When the temperature in quartz pipe reaches 630 DEG C, stopping is passed through nitrogen；Respectively via gas
It is passed through end and is passed through acetylene, acetylene is passed through speed for 5ml/s, and cracking reaction occurs in quartz pipe for the acetylene being passed through, and cracking is anti-
Hydrogen should be generated and in base band Surface Creation solid carbon, the hydrogen of generation is discharged via gas discharge end, stop being passed through after 7 hours
Acetylene, and stop heating, cooling obtains the negative battery base band of Surface Creation carbon-coating and the positive battery base of Surface Creation carbon-coating
Band.
Through measurement, positive battery base band carbon layer on surface average thickness is 2.5 microns, and base band shows that integral thickness is uniform；
Negative battery base band carbon layer on surface average thickness is 2.6, and base band shows that integral thickness is uniform.
Positive battery base band and negative battery base band are fabricated to battery, battery 20C discharge capacities is tested, obtains the battery
20C discharge capacities are 95%.
Comparative example 1
One layer of conductive carbon layer is respectively coated in positive battery base band and negative battery base band surface using conventional method, and will
Treated positive battery base band and negative battery base band are fabricated to battery, test battery 20C discharge capacities.
After measured, using the positive battery base band and negative battery base band carbon layer on surface uneven thickness of conventional process
It is even, and the battery 20C discharge capacities prepared are 53%.
From embodiment 1~6 and comparative example 1, the processing method for the lithium ion battery base band that the present invention is provided, using splitting
Solution mode shows to generate one layer of uniform carbon-coating in base band, because it does not introduce the organic gel of insulation on base band surface, undoped
Non-conductive material so that battery conductive performance obtains higher lifting；And the processing method is using cracking mode in base band table
Face generates carbon-coating, because cracking reaction speed is slow, is easily controlled, therefore uniform in the carbon layers having thicknesses of base band Surface Creation；
This method is simple, convenient quick, cost-effective, suitable for factorial praluction.
Those of ordinary skills in the art should understand that：The discussion of any of the above embodiment is exemplary only, not
It is intended to imply that the scope of the present disclosure (including claim) is limited to these examples；Under the thinking of the present invention, above example
Or can also not be combined between the technical characteristic in be the same as Example, and there is the different aspect of the present invention as described above
Many other changes, in order to it is concise they provided not in details.Therefore, within the spirit and principles of the invention,
Any omission, modification, equivalent substitution, improvement for being made etc., should be included in the scope of the protection.
Claims (7)
1. a kind of processing method of lithium ion battery base band, it is characterised in that comprise the following steps：
(1) battery base band is placed in quartz pipe by, and inert gas is passed through into the quartz pipe, while by the quartz
Pipeline temperature rise, stops being passed through inert gas when the quartz pipe is warming up to cracking temperature；
(2) stops being passed through after inert gas, cracked gas is passed through into the quartz pipe, the cracked gas is cracked
Reaction, stops being passed through cracked gas after 5~7 hours, obtains the base band of Surface Creation carbon-coating.
2. the processing method of lithium ion battery base band according to claim 1, it is characterised in that the electricity in the step (1)
Pond base band is positive battery base band.
3. the processing method of lithium ion battery base band according to claim 1, it is characterised in that the electricity in the step (1)
Pond base band is negative battery base band.
4. the processing method of lithium ion battery base band according to claim 1, it is characterised in that the electricity in the step (1)
Pond base band is positive battery base band and negative battery base band.
5. the processing method of the lithium ion battery base band according to any one of Claims 1 to 4, it is characterised in that the step
(1) speed that is passed through of inert gas is 3~8ml/s in, and the inert gas is nitrogen.
6. the processing method of the lithium ion battery base band according to any one of Claims 1 to 4, it is characterised in that the step
(1) cracking temperature is 600~700 DEG C in.
7. the processing method of the lithium ion battery base band according to any one of Claims 1 to 4, it is characterised in that the step
(2) cracked gas is passed through speed for 3~8ml/s in；The cracked gas is acetylene or ethene.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710439969.2A CN107256970A (en) | 2017-06-12 | 2017-06-12 | A kind of processing method of lithium ion battery base band |
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| CN201710439969.2A CN107256970A (en) | 2017-06-12 | 2017-06-12 | A kind of processing method of lithium ion battery base band |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS642251A (en) * | 1987-06-24 | 1989-01-06 | Matsushita Electric Ind Co Ltd | Organic electrolyte battery |
| CN1777965A (en) * | 2003-03-31 | 2006-05-24 | 东洋铝株式会社 | Foil for negative electrode of capacitor and process 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 |
| CN103515616A (en) * | 2012-06-27 | 2014-01-15 | 万向电动汽车有限公司 | Positive electrode piece of lithium-ion power battery and preparation method thereof |
| CN103579630A (en) * | 2012-07-18 | 2014-02-12 | 海洋王照明科技股份有限公司 | Preparation method for aluminum foil current collector and application |
| CN104659371A (en) * | 2013-12-20 | 2015-05-27 | 湖南省正源储能材料与器件研究所 | High-temperature-resistant low-resistance high-organic-compatibility coated-carbon aluminum foil and preparation method thereof |
| CN105336912A (en) * | 2015-09-14 | 2016-02-17 | 哈尔滨工业大学 | Method for enhancing lithium ion battery current collector and active material adhesion |
-
2017
- 2017-06-12 CN CN201710439969.2A patent/CN107256970A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS642251A (en) * | 1987-06-24 | 1989-01-06 | Matsushita Electric Ind Co Ltd | Organic electrolyte battery |
| CN1777965A (en) * | 2003-03-31 | 2006-05-24 | 东洋铝株式会社 | Foil for negative electrode of capacitor and process 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 |
| CN103515616A (en) * | 2012-06-27 | 2014-01-15 | 万向电动汽车有限公司 | Positive electrode piece of lithium-ion power battery and preparation method thereof |
| CN103579630A (en) * | 2012-07-18 | 2014-02-12 | 海洋王照明科技股份有限公司 | Preparation method for aluminum foil current collector and application |
| CN104659371A (en) * | 2013-12-20 | 2015-05-27 | 湖南省正源储能材料与器件研究所 | High-temperature-resistant low-resistance high-organic-compatibility coated-carbon aluminum foil and preparation method thereof |
| CN105336912A (en) * | 2015-09-14 | 2016-02-17 | 哈尔滨工业大学 | Method for enhancing lithium ion battery current collector and active material adhesion |
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Application publication date: 20171017 |