CN105958010A - Composite negative electrode of lithium-ion battery and production method - Google Patents
Composite negative electrode of lithium-ion battery and production method Download PDFInfo
- Publication number
- CN105958010A CN105958010A CN201610456010.5A CN201610456010A CN105958010A CN 105958010 A CN105958010 A CN 105958010A CN 201610456010 A CN201610456010 A CN 201610456010A CN 105958010 A CN105958010 A CN 105958010A
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- ion battery
- lithium ion
- raw material
- negative pole
- carbon film
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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
- H01M4/139—Processes of manufacture
- H01M4/1393—Processes of manufacture of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
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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
- H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
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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
- H01M4/134—Electrodes based on metals, Si or alloys
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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
- H01M4/139—Processes of manufacture
- H01M4/1395—Processes of manufacture of electrodes based on metals, Si or alloys
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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
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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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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention provides a composite negative electrode of a lithium-ion battery and a production method. A carbon film is adopted by the negative electrode of the lithium-ion battery as a current collector, and high-specific capacity materials of silicon, tin, aluminum and the like are adopted as negative electrode active materials. High-specific capacity negative electrode powder active materials of the silicon, the tin and the like are added to a liquid carbon-source raw material for mixing to prepare the negative electrode raw material; the negative electrode raw material is added to a melting tank containing a high-temperature and high-density molten liquid and a liquid raw material thin layer is formed on the surface of the molten liquid; the liquid raw material thin layer is heated and the carbon-source raw material is carbonized at a high temperature to form a solid negative electrode thin film; and the negative electrode thin film is taken out and processed into the negative electrode of the lithium-ion battery.
Description
Technical field
The present invention relates to chemical cell, particularly lithium ion battery.
Background technology
Lithium ion battery negative generally uses material with carbon element as active substance, and Copper Foil is as collector, and macromolecular material is as binding agent.Copper Foil and macromolecular material are all not involved in the electrochemical reaction of battery charging and discharging, and the density of copper is big, and the ratio accounting for negative pole is great, are unfavorable for improving the specific energy of lithium ion battery.High polymer binder is insulant, affects the electric conductivity of negative pole, is unfavorable for that lithium ion battery promotes electrical property.The specific capacity ratio of material with carbon element is relatively low, and the specific energy that will improve lithium ion battery further is relatively difficult.
Summary of the invention
It is an object of the invention to provide the lithium ion battery negative of a kind of height ratio capacity, the specific energy of lithium ion battery can be greatly improved.The lithium ion battery negative of the present invention uses carbon film as collector, and the material such as the silicon of height ratio capacity, stannum, aluminum is embedded in carbon film as negative electrode active material, without high polymer binder.Concrete production procedure is as follows, the first step, the height ratio capacity negative electrode powder body active substance such as silicon, stannum joins the mixing of liquid carbon source raw material, prepares negative pole raw material；Second step, is added to melt the liquid bath that melts of liquid equipped with high-temperature high-density by negative pole raw material, and negative pole raw material is melting liquid surface formation liquid charging stock thin layer；3rd step, liquid charging stock thin layer heating carbon source raw material high temperature cabonization, form solid negative film；4th step, negative film takes out and is processed into lithium ion battery negative.Described carbon source raw material can be asphalt, coal tar pitch, it is also possible to viscose glue or other macromolecular materials.The liquid that melts of described high-temperature high-density can be motlten metal, it is also possible to is fuse salt.
A kind of lithium ion battery, is mainly made up of positive pole, negative pole, barrier film, electrolyte and shell.Positive pole can be lithium cobaltate cathode can also be iron phosphate lithium positive pole, it is also possible to be ternary material positive pole or lithium manganate cathode；Negative pole is compound carbon film negative pole, and active substance is the height ratio capacity material such as silicon, stannum.
Accompanying drawing explanation
Accompanying drawing 1 is the schematic diagram of lithium ion battery composite cathode, wherein 21--carbon film, 22 active substances.
Accompanying drawing 2 is the lithium ion battery composite cathode schematic diagram of multiple structure, wherein 41 mesophase carbon film layer, the active substance that 42 mesophase carbon film layers are embedding, 43 graphite-phase carbon film layers.
Detailed description of the invention
Embodiment one
The lithium ion battery negative of the present invention uses carbon film as collector, and silicon is as negative electrode active material, and silica flour is embedded in carbon film, without high polymer binder.Concrete production procedure is as follows, and silica flour is joined asphalt, is mixed with negative pole raw material by the first step；Second step, is added to negative pole raw material melt liquid bath equipped with molten tin, forms liquid charging stock thin layer melting tin surfaces；3rd step, liquid charging stock thin layer heated asphalt high temperature cabonization, form solid negative film, heating-up temperature is more than 1000 degrees Celsius；4th step, negative film takes out and is processed into lithium ion battery negative.Described negative pole makes rectangular lithium ion battery together with iron phosphate lithium positive pole, barrier film, electrolyte and shell.
Embodiment two
The lithium ion battery negative of the present invention uses carbon film as collector, and stannum is as negative electrode active material, and glass putty is embedded in carbon film, without high polymer binder.Concrete production procedure is as follows, and glass putty is joined asphalt, is mixed with negative pole raw material by the first step；Second step, is added to negative pole raw material melt liquid bath equipped with molten tin, forms liquid charging stock thin layer melting tin surfaces；3rd step, liquid charging stock thin layer heated asphalt high temperature cabonization, form solid negative film, heating-up temperature is more than 1000 degrees Celsius；4th step, negative film takes out and is processed into lithium ion battery negative.Described negative pole makes rectangular lithium ion battery together with iron phosphate lithium positive pole, barrier film, electrolyte and shell.
Embodiment three
The lithium ion battery negative of the present invention uses carbon film as collector, and silicon is as negative electrode active material, and silica flour is embedded in carbon film, without high polymer binder.Concrete production procedure is as follows, and silica flour is joined coal tar pitch, is mixed with negative pole raw material by the first step；Second step, is added to negative pole raw material melt liquid bath equipped with molten tin, forms liquid charging stock thin layer melting tin surfaces；3rd step, liquid charging stock thin layer heated asphalt high temperature cabonization, form solid negative film；4th step, negative film takes out and is processed into lithium ion battery negative.Described negative pole makes column lithium ion battery together with lithium manganate cathode, barrier film, electrolyte and shell.
Embodiment four
The lithium ion battery negative of the present invention uses carbon film as collector, and stannum is as negative electrode active material, and glass putty is embedded in carbon film, without high polymer binder.Concrete production procedure is as follows, and glass putty is joined coal tar pitch, is mixed with negative pole raw material by the first step；Second step, is added to negative pole raw material melt liquid bath equipped with molten tin, forms liquid charging stock thin layer melting tin surfaces；3rd step, liquid charging stock thin layer heated asphalt high temperature cabonization, form solid negative film；4th step, negative film takes out and is processed into lithium ion battery negative.Described negative pole makes column lithium ion battery together with lithium manganate cathode, barrier film, electrolyte and shell.
Embodiment five
The lithium ion battery negative of the present invention uses carbon film as collector, and silicon is as negative electrode active material, and silica flour is embedded in carbon film, without high polymer binder.Concrete production procedure is as follows, and silica flour is joined asphalt, is mixed with negative pole raw material by the first step；Second step, is added to negative pole raw material melt liquid bath equipped with molten tin, forms liquid charging stock thin layer melting tin surfaces；3rd step, liquid charging stock thin layer heated asphalt high temperature cabonization, form solid negative film；4th step, negative film takes out and is processed into lithium ion battery negative.Described negative pole makes flexible packing lithium ion battery together with ternary material positive pole, barrier film, electrolyte and shell.
Embodiment six
The lithium ion battery negative of the present invention uses carbon film as collector, and stannum is as negative electrode active material, and glass putty is embedded in carbon film, without high polymer binder.Concrete production procedure is as follows, and glass putty is joined asphalt, is mixed with negative pole raw material by the first step；Second step, is added to negative pole raw material melt liquid bath equipped with molten tin, forms liquid charging stock thin layer melting tin surfaces；3rd step, liquid charging stock thin layer heated asphalt high temperature cabonization, form solid negative film；4th step, negative film takes out and is processed into lithium ion battery negative.Described negative pole makes column lithium ion battery together with lithium cobaltate cathode, barrier film, electrolyte and shell.
Embodiment seven
The lithium ion battery negative of the present invention uses carbon film as collector, and stannum is as negative electrode active material, and glass putty is embedded in the outer layer carbon film of compound carbon film, without high polymer binder.Concrete production procedure is as follows, and glass putty is joined coal tar pitch, is mixed with negative pole raw material by the first step；Second step, by two of negative pole raw material to graphite film；3rd step, heating is coated with negative pole raw material to graphite film, asphalt high-temperature carbonization, the compound carbon film of formation；4th step, takes out compound carbon film and is processed into lithium ion battery negative.Described negative pole makes column lithium ion battery together with lithium cobaltate cathode, barrier film, electrolyte and shell.
Embodiment eight
The lithium ion battery negative of the present invention uses carbon film as collector, and silicon is as negative electrode active material, and silica flour is embedded in the outer layer carbon film of compound carbon film, without high polymer binder.Concrete production procedure is as follows, and silica flour is joined coal tar pitch, is mixed with negative pole raw material by the first step；Second step, by two of negative pole raw material to graphite film；3rd step, heating is coated with negative pole raw material to graphite film, asphalt high-temperature carbonization, the compound carbon film of formation；4th step, takes out compound carbon film and is processed into lithium ion battery negative.Described negative pole makes flexible packing lithium ion battery together with ternary material positive pole, barrier film, electrolyte and shell.
Embodiment nine
The lithium ion battery negative of the present invention uses carbon film as collector, and stannum is as negative electrode active material, and glass putty is embedded in carbon film, without high polymer binder.Concrete production procedure is as follows, and glass putty is joined coal tar pitch, is mixed with negative pole raw material by the first step；Second step, by two of negative pole raw material to graphite film；3rd step, heating is coated with negative pole raw material to graphite film, asphalt high-temperature carbonization, formation composite negative pole thin film；4th step, takes out negative film and is processed into lithium ion battery negative.Described negative pole makes column lithium ion battery together with iron phosphate lithium positive pole, barrier film, electrolyte and shell.
Embodiment ten
The lithium ion battery negative of the present invention uses carbon film as collector, and silicon is as negative electrode active material, and silica flour is embedded in carbon film, without high polymer binder.Concrete production procedure is as follows, and silica flour is joined coal tar pitch, is mixed with negative pole raw material by the first step；Second step, by two of negative pole raw material to graphite film；3rd step, heating is coated with negative pole raw material to graphite film, asphalt high-temperature carbonization, formation composite negative pole thin film；4th step, takes out negative film and is processed into lithium ion battery negative.Described negative pole makes flexible packing lithium ion battery together with lithium manganate cathode, barrier film, electrolyte and shell.
Embodiment 11
The lithium ion battery negative of the present invention uses carbon film as collector, and silicon is as negative electrode active material, and silica flour is embedded in outer layer carbon film, without high polymer binder.Concrete production procedure is as follows, and silica flour is joined asphalt, is mixed with negative pole raw material by the first step；Second step, is added to negative pole raw material melt liquid bath equipped with molten tin, forms liquid charging stock thin layer melting tin surfaces；3rd step, liquid charging stock thin layer heated asphalt high temperature cabonization, form compound carbon film；4th step, compound carbon film takes out, at compound carbon film coated on two surfaces aluminium sesquioxide slurry；5th step, heat drying, form composite negative pole film；6th step, composite negative pole film is processed into lithium ion battery negative.Described negative pole makes rectangular lithium ion battery together with iron phosphate lithium positive pole, barrier film, electrolyte and shell.
Embodiment 12
The lithium ion battery negative of the present invention uses carbon film as collector, and stannum is as negative electrode active material, and glass putty is embedded in outer layer carbon film, without high polymer binder.Concrete production procedure is as follows, and glass putty is joined asphalt, is mixed with negative pole raw material by the first step；Second step, is added to negative pole raw material melt liquid bath equipped with molten tin, forms liquid charging stock thin layer melting tin surfaces；3rd step, liquid charging stock thin layer heated asphalt high temperature cabonization, form compound carbon film；4th step, compound carbon film takes out at negative pole coated on two surfaces aluminium sesquioxide slurry；5th step, heat drying, form composite negative pole film；6th step, composite negative pole film is processed into lithium ion battery negative.Described negative pole makes flexible packing lithium ion battery together with lithium manganate cathode, barrier film, electrolyte and shell.
Above-described embodiment is the certain applications of the present invention, and different carbon source material, different negative electrode active material, different processing technique and different positive electrode have many combinations, and these combinations can realize the present invention.
Claims (10)
1. a lithium ion battery composite cathode, it is characterised in that the collector of composite negative pole is carbon film, the active substance of height ratio capacity is embedded in carbon film.
Lithium ion battery composite cathode the most according to claim 1, it is characterised in that the active substance of height ratio capacity is silicon.
Lithium ion battery composite cathode the most according to claim 1, it is characterised in that the active substance of height ratio capacity is stannum.
Lithium ion battery composite cathode the most according to claim 1, it is characterised in that composite negative current collector carbon film is Colophonium carbon film.
Lithium ion battery composite cathode the most according to claim 1, it is characterised in that the collector carbon film of composite negative pole is sandwich, intermediate layer is graphite, and outer layer is mesocarbon, and active substance is embedded in outer layer carbon film.
6. the production method of a lithium ion battery composite cathode, it is characterised in that production procedure mainly includes 1) negative electrode active material joins carbon source raw material, and mix homogeneously prepares negative pole raw material；2) negative pole raw material melts liquid surface at high-temperature high-density and forms thin layer of fluid；3) negative pole raw material heating carbonization forms composite negative pole carbon film；4) composite negative pole carbon film is processed into lithium ion battery negative.
Lithium ion battery composite cathode production method the most according to claim 6, it is characterised in that carbon source raw material is Colophonium, melting liquid is motlten metal.
8. the production method of a lithium ion battery composite cathode, it is characterised in that production procedure mainly includes 1) negative electrode active material joins carbon source raw material, and mix homogeneously prepares negative pole raw material；2) negative pole raw material is at two of carbon film；3) negative pole raw material heating, its carbon source raw material carbonization forms composite negative pole carbon film；4) composite negative pole carbon film is processed into lithium ion battery negative.
Lithium ion battery composite cathode production method the most according to claim 8, it is characterised in that carbon film used is graphite film.
10. a lithium ion battery, is mainly made up of positive pole, negative pole, barrier film, electrolyte, shell, it is characterised in that negative pole is the lithium ion battery composite cathode described in claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610456010.5A CN105958010A (en) | 2016-06-22 | 2016-06-22 | Composite negative electrode of lithium-ion battery and production method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610456010.5A CN105958010A (en) | 2016-06-22 | 2016-06-22 | Composite negative electrode of lithium-ion battery and production method |
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| CN201610456010.5A Pending CN105958010A (en) | 2016-06-22 | 2016-06-22 | Composite negative electrode of lithium-ion battery and production method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101459238A (en) * | 2008-12-23 | 2009-06-17 | 大连海事大学 | Manufacturing method for high capacity composite electrode of lithium ionic cell |
| CN101465416A (en) * | 2008-12-31 | 2009-06-24 | 大连海事大学 | High specific capacity composite electrode pole piece for lithium ion battery |
| CN104241601A (en) * | 2014-07-02 | 2014-12-24 | 宁波艾特米克锂电科技有限公司 | Preparation method of metal-current-collector-free lithium battery or super-capacitor electrode |
| CN104810504A (en) * | 2014-01-24 | 2015-07-29 | 中国科学院金属研究所 | Flexible graphene current collector and active material integrated electrode pole piece and preparation method thereof |
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2016
- 2016-06-22 CN CN201610456010.5A patent/CN105958010A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101459238A (en) * | 2008-12-23 | 2009-06-17 | 大连海事大学 | Manufacturing method for high capacity composite electrode of lithium ionic cell |
| CN101465416A (en) * | 2008-12-31 | 2009-06-24 | 大连海事大学 | High specific capacity composite electrode pole piece for lithium ion battery |
| CN104810504A (en) * | 2014-01-24 | 2015-07-29 | 中国科学院金属研究所 | Flexible graphene current collector and active material integrated electrode pole piece and preparation method thereof |
| CN104241601A (en) * | 2014-07-02 | 2014-12-24 | 宁波艾特米克锂电科技有限公司 | Preparation method of metal-current-collector-free lithium battery or super-capacitor electrode |
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Application publication date: 20160921 |