CN110120493A - A kind of lithium ion cell positive benefit lithium method - Google Patents
A kind of lithium ion cell positive benefit lithium method Download PDFInfo
- Publication number
- CN110120493A CN110120493A CN201810120654.6A CN201810120654A CN110120493A CN 110120493 A CN110120493 A CN 110120493A CN 201810120654 A CN201810120654 A CN 201810120654A CN 110120493 A CN110120493 A CN 110120493A
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- Prior art keywords
- lithium
- lithium ion
- positive
- ion cell
- mends
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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
- 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
-
- 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
-
- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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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
Abstract
A kind of lithium ion cell positive benefit lithium method, the benefit lithium for lithium ion cell positive.In positive pulping process, the materials such as lithium material and positive main material, conductive agent, binder and solvent will be mended and be uniformly mixed, then process is coated with, rolls, assembling, lithium battery is made in fluid injection, chemical conversion, the processes such as partial volume.Compared with prior art, the present invention without changing technique, it is easy to operate；Without inert atmosphere protection; to environment without particular/special requirement; it is transformed without to existing production technology and equipment; it only need to be under existing production environment, equipment and process conditions; lithium material will be mended in positive pulping process to be uniformly mixed with materials such as main material, binder and conductive agents, not need to increase additional equipment cost；The invention belongs to " wet process benefit lithiums ", avoid dust pollution and safety problem that dry method mends lithium.After lithium ion battery is by mending lithium, its first charge discharge efficiency and battery capacity can be improved, to increase the energy density of battery.
Description
Technical field
The present invention relates to technical field of lithium ion, the method for specifically a kind of lithium ion cell positive benefit lithium.
Background technique
Lithium ion battery is due to becoming application range most with advantages such as high voltage, high-energy density and long circulation lifes
One of wide secondary cell.But with portable electronic device micromation, standby for a long time continuous development and electrical salf-walking
Vehicle, electric car etc. be high-power, high-energy device enabling, all mentions to the energy density of the lithium ion battery as accumulation power supply
Increasingly higher demands are gone out.
During the initial charge of battery, since the solid electrolyte interface film that negative electrode tab surface is formed can consume part
The Li to come is migrated from positive plate+, thereby result in Li in positive electrode+Loss cause electricity to reduce the capacity of battery
The reduction of pond first charge discharge efficiency.The especially table when the active material in negative electrode tab is alloy material (such as silicon alloy and tin alloy)
Now it is particularly evident, so in order to improve the first charge discharge efficiency of battery, the application for mending lithium technology seems especially urgent.
Presently the most common benefit lithium technology is divided into cathode and mends lithium and anode benefit lithium, and wherein cathode is mended lithium technology and mainly used
The techniques such as lithium powder and lithium foil supplement cathode irreversible capacity loss during initial charge, and this method process conditions are harsh, throw
Money is big, and the use of lithium metal causes biggish security risk.Such as Publication No. CN1290209C patent application mention by
Lithium metal, negative electrode material and on-aqueous liquid are mixed to form slurry, and slurry is coated on collector, then dry slurries, roll-in
After electrolyte is perfused, diffuse into lithium powder inside active material.Although this method can be improved first charge discharge efficiency, but due to metal
Lithium reactivity is higher, and whole operation needs carry out in anhydrous dry environment, and want strict temperature control, leads to process
It is complicated.Further, since lithium powder is lighter, it is easy to float in the slurry, causes the difficulty of addition.Publication No. CN102916164A
Patent by addition organolithium, although the patent can reach benefit lithium, improve the purpose of first effect, the solvent of organolithium is positive
The hexane solution and phenyl lithium of hexane solution, tert-butyl lithium, solution is toxic, and operates needs and grasp in inert protective gas
Make, increases cost and operation difficulty.The patent of invention of publication number CN105206779A discloses a kind of ceramic diaphragm, existing
On the basis of basement membrane, coat one layer of Li2MnO3, Li2MnO3-LiNiCoMnO2, Li5FeO4, Li5Fe5O8 etc. can removal lithium embedded from
The compound of son, although this method can play the role of mending lithium in charge and discharge process, in the mistake of diaphragm coating compound
Will definitely increase equipment, technique, the cost of material in journey, can also change after diaphragm coating tensile strength, the gas permeability of diaphragm with
And the performances such as porosity.
Summary of the invention
In order to overcome the deficiencies of the prior art, goal of the invention of the invention is to provide a kind of lithium ion cell positive benefit lithium side
Method, to solve the problems, such as that battery first charge discharge efficiency is low in charge and discharge process.
For achieving the above object, the present invention will mend lithium material and positive main material, conduction in positive pulping process
Agent, binder and solvent material are uniformly mixed, then by being coated with, rolling, assembling, fluid injection, chemical conversion, partial volume process be made lithium from
Sub- battery.
It is described to mend the positive electrode that lithium material is high capacity；The high capacity positive electrode is Li2MnO3, Li2MnO3-
LiNiCoMnO2、Li5Fe5O8、Li5FeO4、Li1+xNi0.5Mn1.5O4Or Li2NiO2One or more of material；High capacity is just
Pole material during the charging process, Li+Element is deviate from from high capacity positive electrode, is embedded into cathode and supplements first charge-discharge not
Reversible capacity.
The ratio that the amount of the high capacity positive electrode accounts for positive main material is 0.1-20%.
Further, it is 0.5-3% that the amount of high capacity positive electrode, which accounts for the ratio of positive main material,.
The anode main material is cobalt acid lithium, LiMn2O4, nickle cobalt lithium manganate, nickel cobalt aluminic acid lithium ion battery positive electrode
It is one or more of.
The conductive agent is one of SUPER-P, KS-6, KS-15, VGCF, SFG6, ECP, carbon nanotube, graphene
Or it is several.
The binder is one or more of PVDF, PTFE, LA132, LA133, CMC and SBR.
The solvent is one or more of NMP or water.
Compared with prior art, the present invention without changing technique, it is easy to operate；Without inert atmosphere protection, to environment without
Particular/special requirement is transformed without to existing production technology and equipment, only need to be in existing production environment, equipment and process conditions
Under, lithium material will be mended in positive pulping process and will be uniformly mixed with materials such as main material, binder and conductive agents, not need to increase
Add additional equipment cost；The invention belongs to " wet process benefit lithiums ", avoid dust pollution and safety problem that dry method mends lithium.Lithium from
After sub- battery is by mending lithium, its first charge discharge efficiency and battery capacity can be improved, to increase the energy density of battery.
Specific embodiment
Embodiment one: in positive pulping process, by Li5FeO4Mend lithium material and cobalt acid lithium main material, SUPER-P conductive agent,
The materials such as PVDF binder and nmp solvent are uniformly mixed, wherein Li5FeO4Amount be cobalt acid lithium weight 2%, then through painting
Cloth, roll, assemble, lithium ion battery is made in fluid injection, chemical conversion, the processes such as partial volume.
Embodiment two: in positive pulping process, by Li5FeO4Mend lithium material and LiMn2O4 main material, SUPER-P conductive agent,
The materials such as PVDF binder and nmp solvent are uniformly mixed, wherein Li5FeO4Amount be LiMn2O4 weight 1%, then through painting
Cloth, roll, assemble, lithium ion battery is made in fluid injection, chemical conversion, the processes such as partial volume.
Embodiment three: in positive pulping process, Li2MnO3-LiNiCoMnO2 is mended into lithium material and nickle cobalt lithium manganate master
The materials such as material, SUPER-P, kS-6 conductive agent, PVDF binder and nmp solvent are uniformly mixed, wherein Li2MnO3-
The amount of LiNiCoMnO2 is the 5% of nickle cobalt lithium manganate weight, then by being coated with, rolling, assembling, fluid injection, chemical conversion, the works such as partial volume
Lithium ion battery is made in sequence.
Example IV: in positive pulping process, by Li2NiO2Mend lithium material and nickle cobalt lithium manganate main material, SUPER-P,
The materials such as kS-6 conductive agent, PVDF binder and nmp solvent are uniformly mixed, wherein Li2NiO2Amount be nickle cobalt lithium manganate weight
4%, then by being coated with, rolling, assembling, fluid injection, chemical conversion, the processes such as partial volume lithium ion battery is made.
Embodiment five: in positive pulping process, by Li2NiO2Mend lithium material and LiFePO4 main material, SUPER-P, PVDF
The materials such as binder and nmp solvent are uniformly mixed, wherein Li2NiO2Amount be LiFePO4 weight 5%, then by coating,
It rolls, assemble, lithium ion battery is made in fluid injection, chemical conversion, the processes such as partial volume.
Embodiment six: in positive pulping process, by Li2NiO2Lithium material is mended to lead with LiMn2O4 main material, SUPER-P, kS-6
The materials such as electric agent, LA132 binder and deionized water solvent are uniformly mixed, wherein Li2NiO2Amount be LiMn2O4 weight 1%,
Then by being coated with, rolling, assembling, fluid injection, chemical conversion, the processes such as partial volume lithium ion battery is made.
Embodiment seven: in positive pulping process, Li2MnO3 is mended into lithium material and nickle cobalt lithium manganate main material, carbon nanotube
The materials such as conductive agent, PVDF binder and deionized water solvent are uniformly mixed, and wherein the amount of Li2MnO3 is nickle cobalt lithium manganate weight
5%, then by being coated with, rolling, assembling, fluid injection, chemical conversion, the processes such as partial volume lithium ion battery is made.
The lithium ion battery of different systems performance comparison such as table 1 before and after mending lithium:
It should be noted that negative electrode material of the invention be graphite, silicon, silica and silicon and silicon oxygen and graphite mixture,
And other tin alloys etc..
Claims (8)
1. a kind of lithium ion cell positive mends lithium method, it is characterised in that: in positive pulping process, lithium material and anode will be mended
Main material, conductive agent, binder and solvent material are uniformly mixed, then by being coated with, rolling, assembling, fluid injection, chemical conversion, partial volume work
Lithium ion battery is made in sequence.
2. a kind of lithium ion cell positive according to claim 1 mends lithium method, it is characterised in that: the benefit lithium material is
The positive electrode of high capacity；The high capacity positive electrode be Li2MnO3, Li2MnO3-LiNiCoMnO2, Li5Fe5O8,
Li5FeO4、Li1+xNi0.5Mn1.5O4Or Li2NiO2One or more of material；High capacity positive electrode during the charging process,
Li+Element is deviate from from high capacity positive electrode, is embedded into the irreversible capacity that first charge-discharge is supplemented in cathode.
3. a kind of lithium ion cell positive according to claim 2 mends lithium method, it is characterised in that: the high capacity anode
The ratio that the amount of material accounts for positive main material is 0.1-20%.
4. a kind of lithium ion cell positive according to claim 3 mends lithium method, it is characterised in that: high capacity positive electrode
Amount account for positive main material ratio be 0.5-3%.
5. a kind of lithium ion cell positive according to claim 1 mends lithium method, it is characterised in that: the anode main material is
The one or more of cobalt acid lithium, LiMn2O4, nickle cobalt lithium manganate, nickel cobalt aluminic acid lithium ion battery positive electrode.
6. a kind of lithium ion cell positive according to claim 1 mends lithium method, it is characterised in that: the conductive agent is
One or more of SUPER-P, KS-6, KS-15, VGCF, SFG6, ECP, carbon nanotube, graphene.
7. a kind of lithium ion cell positive according to claim 1 mends lithium method, it is characterised in that: the binder is
One or more of PVDF, PTFE, LA132, LA133, CMC and SBR.
8. a kind of lithium ion cell positive according to claim 1 mends lithium method, it is characterised in that: solvent is NMP or water
One or more of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810120654.6A CN110120493A (en) | 2018-02-07 | 2018-02-07 | A kind of lithium ion cell positive benefit lithium method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810120654.6A CN110120493A (en) | 2018-02-07 | 2018-02-07 | A kind of lithium ion cell positive benefit lithium method |
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| CN110120493A true CN110120493A (en) | 2019-08-13 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110993939A (en) * | 2019-10-21 | 2020-04-10 | 肇庆遨优动力电池有限公司 | Lithium ion battery and preparation method thereof |
| CN112701277A (en) * | 2020-12-24 | 2021-04-23 | 中国科学院宁波材料技术与工程研究所 | Lithium ion battery prelithiation additive and application thereof |
| CN113097453A (en) * | 2020-01-09 | 2021-07-09 | 荣盛盟固利新能源科技有限公司 | Lithium pre-embedding method for positive electrode of lithium ion battery |
| CN113381056A (en) * | 2021-05-28 | 2021-09-10 | 万向一二三股份公司 | Lithium ion battery with long cycle life and method for prolonging cycle life of lithium ion battery |
| CN113471413A (en) * | 2020-03-31 | 2021-10-01 | 北京卫蓝新能源科技有限公司 | Composite lithium supplement slurry, preparation method and application |
| CN113488610A (en) * | 2021-06-07 | 2021-10-08 | 万向一二三股份公司 | Lithium ion battery anode, lithium ion battery and preparation method of battery |
| CN113540595A (en) * | 2021-06-18 | 2021-10-22 | 万向一二三股份公司 | Formation method for improving high-nickel ternary material battery cell interface |
| CN114335428A (en) * | 2021-12-30 | 2022-04-12 | 重庆冠宇电池有限公司 | Positive plate, preparation method and battery |
-
2018
- 2018-02-07 CN CN201810120654.6A patent/CN110120493A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110993939A (en) * | 2019-10-21 | 2020-04-10 | 肇庆遨优动力电池有限公司 | Lithium ion battery and preparation method thereof |
| CN113097453A (en) * | 2020-01-09 | 2021-07-09 | 荣盛盟固利新能源科技有限公司 | Lithium pre-embedding method for positive electrode of lithium ion battery |
| CN113471413A (en) * | 2020-03-31 | 2021-10-01 | 北京卫蓝新能源科技有限公司 | Composite lithium supplement slurry, preparation method and application |
| CN112701277A (en) * | 2020-12-24 | 2021-04-23 | 中国科学院宁波材料技术与工程研究所 | Lithium ion battery prelithiation additive and application thereof |
| CN113381056A (en) * | 2021-05-28 | 2021-09-10 | 万向一二三股份公司 | Lithium ion battery with long cycle life and method for prolonging cycle life of lithium ion battery |
| CN113488610A (en) * | 2021-06-07 | 2021-10-08 | 万向一二三股份公司 | Lithium ion battery anode, lithium ion battery and preparation method of battery |
| CN113540595A (en) * | 2021-06-18 | 2021-10-22 | 万向一二三股份公司 | Formation method for improving high-nickel ternary material battery cell interface |
| CN114335428A (en) * | 2021-12-30 | 2022-04-12 | 重庆冠宇电池有限公司 | Positive plate, preparation method and battery |
| CN114335428B (en) * | 2021-12-30 | 2024-01-30 | 重庆冠宇电池有限公司 | Positive plate, preparation method and battery |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190813 |
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| WD01 | Invention patent application deemed withdrawn after publication |