CN109301353A - The pre- lithium preparation process of cathode - Google Patents
The pre- lithium preparation process of cathode Download PDFInfo
- Publication number
- CN109301353A CN109301353A CN201811024636.4A CN201811024636A CN109301353A CN 109301353 A CN109301353 A CN 109301353A CN 201811024636 A CN201811024636 A CN 201811024636A CN 109301353 A CN109301353 A CN 109301353A
- Authority
- CN
- China
- Prior art keywords
- lithium
- interlayer
- cathode
- negative electrode
- electrode tab
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The present invention provides a kind of pre- lithium preparation process of cathode, including positive plate, interlayer, negative electrode tab and overflow means, by positive plate, interlayer and negative electrode tab successively lamination or winding together with, wherein, positive plate is that positive active material is formed coated in plus plate current-collecting body two sides, negative electrode tab is that negative electrode active material is formed coated in negative current collector two sides, and interlayer is the poromerics with electrolyte；Then plus plate current-collecting body is connected using overflow means with negative current collector, positive plate, interlayer and negative electrode tab is made to form galvanic interaction, the lithium in positive active material is migrated by interlayer to cathode, pre- benefit lithium is carried out to cathode pole piece, to form the cathode of pre- lithium.It is this method simple process, low in cost, prelithiation electric current can be efficiently controlled, the coulombic efficiency for the first time of negative electrode material is improved.
Description
Technical field
The present invention relates to lithium ion battery production technical fields, more particularly to a kind of pre- lithium preparation process of cathode.
Background technique
Lithium ion battery has many advantages, such as output voltage height, effect without memory, at present extensively by battery of mobile phone, electricity
Electrical automobile industry is applied；Meanwhile raising performance of lithium ion battery also becomes the problem of most paying close attention in lithium electricity industry, especially mentions
High lithium battery capacity and the service life for extending lithium battery.
Having an important procedure in Production Process of Lithium Battery is chemical conversion, and the purpose is to make during lithium battery initial charge
Its negative terminal surface forms solid electrolyte film (SEI film).But the formation of SEI film can consume part lithium, cause material therefrom
Thus the loss of lithium, battery capacity also reduce.In addition, SEI film can continue to consume and repair during lithium battery is recycled
Multiple, dead lithium can continue to increase inside positive and negative anodes, and the capacity of battery continues to decline, and result in battery cycle life reduction.
Decline to reduce battery capacity caused by the irreversible consumption of lithium ion in first charge-discharge and recycling
Problem is supplemented lithium ion battery negative electrode amount of activated lithium, in advance so as to improve performance of lithium ion battery.
Summary of the invention
The purpose of the present invention is to provide a kind of simple processes, low in cost, can efficiently control prelithiation electric current, mention
The coulombic efficiency for the first time of high negative electrode material, and significantly improve the lithium ion battery negative material prelithiation side of its cycle performance
Method.
The present invention solves its technical problem technical solution to be taken: a kind of pre- lithium preparation process of cathode, including just
Pole piece, interlayer, negative electrode tab and overflow means, successively lamination or winding are together, such as extensive raw for positive plate-interlayer-negative electrode tab
Continuous pole piece can be used in production and interlayer is wound into a roll the pre- benefit lithium of progress, can effective improving production efficiency.
Positive plate is that positive active material is coated in plus plate current-collecting body two sides, and negative electrode tab is negative electrode active material coated in negative
Pole collector two sides, positive active material can be in the various lithium-containing materials such as LiFePO4, cobalt acid lithium, lithium carbonate, ternary material
One or more.
Interlayer is the poromerics such as the non-woven fabrics for infiltrating electrolyte, diaphragm, will electrolysis by the way of infiltration or spraying
Liquid is uniformly diffused on interlayer, and interlayer material can be the poromerics such as non-woven fabrics, diaphragm.
Then plus plate current-collecting body is connected with negative current collector using overflow means, overflow means, which can control, passes through electric current
Size makes positive plate, interlayer, negative electrode tab form galvanic interaction, and the lithium in positive active material is migrated by interlayer to cathode,
Pre- benefit lithium is carried out to cathode pole piece, to form the cathode of pre- lithium.
The beneficial effects of the present invention are: conventional negative electrode tab is formed after coating active material, benefit lithium can not be carried out, and
Cathode prepared by the present invention: 1, using positive active material as lithium source, securely and reliably, other pre- lithium sources for mending lithium are at present
Lithium metal, lithium metal is more active, burning, explosion etc. easily occurs, and be difficult to control.2, it can be mass produced, promote life
Efficiency is produced, is wound into a roll using continuous pole piece and interlayer, significant increase production efficiency.3, lithium source is at low cost, using low price
Lithium-containing materials, it is at low cost compared with lithium metal.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the schematic illustration of preferred embodiment.
In figure: 1, positive plate, 2, negative electrode tab, 3, interlayer, 4, plus plate current-collecting body, 5, negative current collector, 6, overflow means.
Specific embodiment
Presently in connection with attached drawing, the present invention is described in detail.This figure is simplified schematic diagram, is only illustrated in a schematic way
Basic structure of the invention, therefore it only shows the composition relevant to the invention.
As shown in Figure 1, a kind of pre- lithium preparation process of cathode of the invention, including positive plate 1, interlayer 3, negative electrode tab 2 and mistake
Flow device 6, positive plate 1, interlayer 3 and negative electrode tab 2 successively lamination, plus plate current-collecting body 4 and negative current collector 5 respectively with overflow means
6 connections, interlayer 3 infiltrated electrolyte, and positive plate 1, interlayer 3 and negative electrode tab 2 is made to form galvanic interaction, in positive active material
Lithium migrated to cathode by interlayer 3, to cathode pole piece carry out it is pre- mend lithium, pass through the electric current that overflow means 6 adjust control conducting
Size.Overflow means 6 are the equal of a slide rheostat, control size of current by adjusting the size of resistance.
Positive plate 1 is that positive active material is coated in 4 two sides of plus plate current-collecting body, and negative electrode tab 2 is negative electrode active material coating
In 5 two sides of negative current collector, positive active material can be the various materials containing lithium such as LiFePO4, cobalt acid lithium, lithium carbonate, ternary material
One or more of material.
Interlayer 3 is to infiltrate the poromerics such as non-woven fabrics, the diaphragm of electrolyte, will electrolysis by the way of infiltration or spraying
Liquid is uniformly diffused on interlayer 3, and 3 material of interlayer can be the poromerics such as non-woven fabrics, diaphragm.
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff
Various changes and amendments can be carried out without departing from the scope of the present invention completely.The technical scope of this invention is not
The content being confined on specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (5)
1. a kind of pre- lithium preparation process of cathode, it is characterised in that:, will be positive including positive plate, interlayer, negative electrode tab and overflow means
Piece, interlayer and negative electrode tab successively lamination or winding together with, wherein positive plate be positive active material be coated in plus plate current-collecting body
Two sides are formed, and negative electrode tab is that negative electrode active material is formed coated in negative current collector two sides, and interlayer is the micropore with electrolyte
Material；Then plus plate current-collecting body is connected using overflow means with negative current collector, positive plate, interlayer and negative electrode tab is made to form original
Cell reaction, the lithium in positive active material are migrated by interlayer to cathode, to cathode pole piece carry out it is pre- mend lithium, to be formed pre-
The cathode of lithium.
2. the pre- lithium preparation process of cathode as described in claim 1, it is characterised in that: the poromerics be non-woven fabrics or every
Film.
3. the pre- lithium preparation process of cathode as described in claim 1, it is characterised in that: the overflow means control is big by electric current
It is small.
4. the pre- lithium preparation process of cathode as described in claim 1, it is characterised in that: the positive active material is ferric phosphate
One or more of lithium, cobalt acid lithium, lithium carbonate and ternary material.
5. the pre- lithium preparation process of cathode as described in claim 1, it is characterised in that: the interlayer is using infiltration or the side sprayed
Electrolyte is uniformly diffused on interlayer by formula.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811024636.4A CN109301353A (en) | 2018-09-04 | 2018-09-04 | The pre- lithium preparation process of cathode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811024636.4A CN109301353A (en) | 2018-09-04 | 2018-09-04 | The pre- lithium preparation process of cathode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109301353A true CN109301353A (en) | 2019-02-01 |
Family
ID=65166181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811024636.4A Withdrawn CN109301353A (en) | 2018-09-04 | 2018-09-04 | The pre- lithium preparation process of cathode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109301353A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112018324A (en) * | 2019-05-31 | 2020-12-01 | 宁德时代新能源科技股份有限公司 | Negative pole piece, battery cell and lithium ion battery |
| CN114975874A (en) * | 2021-02-22 | 2022-08-30 | 上海轩玳科技有限公司 | Electrochemical lithium supplementing method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105845894A (en) * | 2016-05-04 | 2016-08-10 | 合肥国轩高科动力能源有限公司 | Pre-lithiation method and device for negative pole pieces of lithium-ion battery |
| CN105870452A (en) * | 2016-05-19 | 2016-08-17 | 宁德新能源科技有限公司 | Anode material, lithium ion battery with anode material and preparation method |
| CN107464919A (en) * | 2017-09-12 | 2017-12-12 | 合肥国轩高科动力能源有限公司 | A kind of method of prelithiation lithium ion battery negative electrode |
| CN107768743A (en) * | 2016-08-18 | 2018-03-06 | 中信国安盟固利动力科技有限公司 | A kind of lithium ion battery mends lithium method |
-
2018
- 2018-09-04 CN CN201811024636.4A patent/CN109301353A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105845894A (en) * | 2016-05-04 | 2016-08-10 | 合肥国轩高科动力能源有限公司 | Pre-lithiation method and device for negative pole pieces of lithium-ion battery |
| CN105870452A (en) * | 2016-05-19 | 2016-08-17 | 宁德新能源科技有限公司 | Anode material, lithium ion battery with anode material and preparation method |
| CN107768743A (en) * | 2016-08-18 | 2018-03-06 | 中信国安盟固利动力科技有限公司 | A kind of lithium ion battery mends lithium method |
| CN107464919A (en) * | 2017-09-12 | 2017-12-12 | 合肥国轩高科动力能源有限公司 | A kind of method of prelithiation lithium ion battery negative electrode |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112018324A (en) * | 2019-05-31 | 2020-12-01 | 宁德时代新能源科技股份有限公司 | Negative pole piece, battery cell and lithium ion battery |
| CN112018324B (en) * | 2019-05-31 | 2021-07-30 | 宁德时代新能源科技股份有限公司 | Negative pole piece, battery cell and lithium ion battery |
| CN114975874A (en) * | 2021-02-22 | 2022-08-30 | 上海轩玳科技有限公司 | Electrochemical lithium supplementing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105845894B (en) | A kind of lithium ion battery negative electrode carries out the method and device of prelithiation | |
| WO2011079482A1 (en) | Battery | |
| CN102856532B (en) | A kind of preparation method of lithium-rich anode strip of lithium ion battery | |
| CN104037458B (en) | Manufacturing method of lithium ion energy storage device | |
| KR20140039022A (en) | Battery | |
| CN109273704A (en) | A kind of lithium anode and preparation method thereof with high-ratio surface protective layer | |
| CN106252663B (en) | Metal-organic framework materials CuBDC nanometer sheet and its preparation method and application | |
| CN105742695B (en) | A kind of lithium ion battery and preparation method thereof | |
| CN110120493A (en) | A kind of lithium ion cell positive benefit lithium method | |
| CN109524621A (en) | A kind of prelithiation method and device for the lithium ion battery negative electrode that prelithiation degree is controllable | |
| CN102157753A (en) | Fast-charging high-power winding column type lithium ion battery | |
| CN107069133B (en) | A kind of method of lithium in recycling lithium cell cathode material | |
| CN110858660A (en) | Lithium ion battery, preparation method thereof and electric vehicle | |
| CN204315663U (en) | A kind of aluminium-sulfur battery Graphene coating negative pole | |
| CN109301353A (en) | The pre- lithium preparation process of cathode | |
| CN114645299A (en) | Electrolysis device | |
| CN109004151A (en) | A kind of preparation method applied to the functional interlayer in lithium-sulfur cell | |
| CN110212164B (en) | Method for improving energy density of lithium ion battery by using lithium salt | |
| CN105591104B (en) | A kind of iron phosphate lithium electrode and preparation method thereof for alkaline secondary cell negative electrode | |
| CN104733189A (en) | Lithium ion-type supercapacitor ternary composite negative electrode material and preparation method thereof | |
| CN111146007A (en) | Zinc ion hybrid supercapacitor and preparation method thereof | |
| CN111129480A (en) | MoO for sodium ion battery2Preparation method of/N-C composite electrode material | |
| CN109659475A (en) | A kind of preparation method of high-performance high-voltage lithium ion battery | |
| CN102340042B (en) | A kind of solar-energy photo-voltaic cell | |
| CN104409783A (en) | Method using rare earth for modification of lead storage battery electrode plates |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190201 |
|
| WW01 | Invention patent application withdrawn after publication |