CN202474091U - Lithium ion battery pole piece and lithium ion battery - Google Patents
Lithium ion battery pole piece and lithium ion battery Download PDFInfo
- Publication number
- CN202474091U CN202474091U CN2011204254418U CN201120425441U CN202474091U CN 202474091 U CN202474091 U CN 202474091U CN 2011204254418 U CN2011204254418 U CN 2011204254418U CN 201120425441 U CN201120425441 U CN 201120425441U CN 202474091 U CN202474091 U CN 202474091U
- Authority
- CN
- China
- Prior art keywords
- lithium ion
- collector
- pole piece
- adhesive layer
- conductive adhesive
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- 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
Landscapes
- Battery Electrode And Active Subsutance (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The utility model relates to a lithium ion pole piece. The lithium ion pole piece comprises a current collector, an electric conduction glue line coated on the current collector and an electrode active material layer coated on the electric conduction glue line. The electric conduction glue line is added in the novel lithium ion pole piece, and therefore electron conduction property of the current collector in a process of charging-discharging large current is improved, adhesive property of the electrode active material and the current collector is strengthened and service life of the dynamic lithium ion battery is prolonged to more than 5,000 times at longest. The electric conduction glue line is capable of resisting corrosion of electrolyte lithium Hexafluorophosphate, chlorate, sulfonate and the like, and therefore pitting corrosion and dissolving of the current collector in a process of using a battery are lowered.
Description
[technical field]
The utility model relates to a kind of electrodes of lithium-ion batteries, particularly a kind of pole piece that is used in power-type lithium ion battery.
[background technology]
Along with the fast development of electronics industry, information technology, people to all kinds of appliances power sources require increasingly high.Polymer Li-ion battery is used to multiple mobile portable equipment, like mobile phone, camera, notebook computer, portable power tool, and national at present emerging strategic industry-electric automobile-lithium-ion-power cell field of vigorously supporting.And the also diversification day by day of the charging modes of battery as is used conventional power source charges, and the stand-by power supply battery charge uses that USB interface on the power consumption equipment charges etc.
The application of electric automobile at present is also increasingly high to the requirement of lithium-ion-power cell, heavy-current discharge, quick charge, long life, high power, high security etc.As shown in Figure 1; Because the pole piece (positive plate, negative plate) of conventional power-type lithium ion battery all is to comprise a collector S1 and be coated in the electrode active material layers S2 on the collector S1; It still is undesirable causing large current charge, rapid charge characteristic, useful life and the power-performance of conventional power-type lithium ion battery; Surpass 20C, useful life above 1000 times in charging current above 10C, discharging current, battery performance is depletion rapidly, and the power of battery also can be decayed rapidly along with the carrying out of charge and discharge cycles; Especially the bonding between collector and the active material worse and worse, generally reaching more than 800 time will normally use.In this case, need a kind of have good high power performance and the power-type lithium ion battery of long life (can reach more than 5000 times).
[utility model content]
The technical problem that the utility model will solve provides a kind of lithium ion pole piece, and it can improve battery performance.
Above-mentioned technical problem solves through following technical scheme:
A kind of lithium ion pole piece is characterized in that, comprises collector, is coated in the conductive adhesive layer on the collector and is coated in the electrode active material layers on the conductive adhesive layer.
The thickness of said conductive adhesive layer is 0.1 μ m～10 μ m.
Said collector is aluminium foil or Copper Foil or nickel screen.
The thickness of said collector is 5-30 μ m.
The utility model lithium ion pole piece has been set up conductive adhesive layer; Significantly improved collector to the electrical conductivity performance in the large current density electric process; Strengthened the adhesive property of electrode active material and collector, improved the long life of power-type lithium ion battery, length can reach more than 5000 times; Conductive adhesive layer can also the electrolyte resistance lithium hexafluoro phosphate and the corrosion of chlorate, sulfonate etc., reduces the spot corrosion and the dissolving on collector surface in the battery use.
The utility model also provides a kind of lithium ion battery; Comprise electrode assemblie, electrolyte and shell; Said electrode assemblie and said electrolyte are sealed in the said shell; Said electrode assemblie comprises positive plate, negative plate, it is characterized in that, said positive plate and said negative plate include collector, are coated in the conductive adhesive layer on the collector and are coated in the electrode active material layers on the conductive adhesive layer.
The utility model lithium ion battery possesses following characteristic:
High cycle life: 5000 capacity of normal temperature circulation can remain on more than 80%; 3000 circulations of 60 ℃ of circulations of high temperature can remain on more than 80%; Because corrosion such as hexafluorophosphoric acid lithium salts in can electrolyte resistance of the collector of coated with conductive glue-line, chlorate, sulfonate, battery can also guarantee the secure bond performance between electrode active material and the collector after having used 8000 times;
High safety performance: because the collector of coated with conductive glue-line has strengthened electron diffusion property and conduction, under large current charge and discharge scenario, the degree of polarization of pole piece is very little, and the thermal diffusivity of collector also significantly improves, and also can not blast, danger on fire;
High power performance is excellent; Heavy-current discharge performance significantly improves: general power-type lithium ion battery can only be accomplished the 20C discharge; But the highest 30-60C that accomplishes of the application's battery discharges; Rapid charge characteristic significantly improves, and general battery is the highest can only accomplish the 10C charging, and the highest 20-30C multiplying power of accomplishing of the application's battery is charged; Compare type lithium ion battery powered by conventional energy, the application's internal resistance of cell significantly reduces more than at least 50%.
[description of drawings]
Fig. 1 is the structural representation of lithium ion pole piece in the background technology;
Fig. 2 is the structural representation of the utility model lithium ion pole piece;
Fig. 3 is the structural representation of the electrode assemblie of the utility model lithium ion battery;
Fig. 4 is the enlarged diagram of the A part of Fig. 3.
[embodiment]
Lithium ion pole piece as shown in Figure 2, that the utility model provides comprises a collector 1, is coated in the conductive adhesive layer 2 on this collector 1 and is coated in the electrode active material layers 3 on the conductive adhesive layer 2.
Conductive adhesive layer 2 comprises conductive agent, binding agent and solvent; Conductive agent is one or more materials in carbon black, acetylene black, crystalline flake graphite, CNT, the carbon nano-fiber; Binding agent is pentacene or silicon crystal or polyolefin or resin or acrylate pressure sensitive adhesive or triethanolamine, and solvent is NMP (methyl pyrrolidone) or acetone or water or alcohol; By weight percentage, the concentration of conductive agent is 0.1%～10%, and the concentration of binding agent is 1-5%, and the concentration of solvent is 85%～98.9%.
Wherein, the thickness of conductive adhesive layer is 0.1 μ m～10 μ m, and collector is aluminium foil or Copper Foil or nickel screen, and the thickness of collector is 5-30 μ m.
The preparation flow of lithium ion pole piece is following: collector carries out the processing of weak acid or weak base earlier before coating; Remove surperficial oil stain or other impurity; To evenly be coated in collection liquid surface through spraying or typography by the conducting resinl solution that the said ratio relation prepares, the collector after the coating is again through baking, with solvent evaporates; Stay the uniform conductive glue-line, electrode coated active material forms electrode active material layers on conductive adhesive layer then; In this process; Can prepare multiple conducting resinl solution (mainly being that conductive agent is different), successively apply these conductive agent solution then, form the conductive adhesive layer of the different conductive agents of multilayer; For example, apply formation crystalline flake graphite conductive adhesive layer earlier and apply formation CNT conductive adhesive layer again.
The lithium ion pole piece has been set up conductive adhesive layer; Significantly improved collector to the electrical conductivity performance in the large current density electric process; Strengthened the adhesive property of electrode active material and collector, improved the long life of battery, length can reach more than 5000 times; Conductive adhesive layer can also the electrolyte resistance lithium hexafluoro phosphate and the corrosion of chlorate, sulfonate etc., reduces the spot corrosion and the dissolving on collector surface in the battery use.
Like Fig. 3 and shown in Figure 4; A kind of lithium ion battery that present embodiment provides; Comprise electrode assemblie 100, electrolyte and shell; Electrode assemblie 100 is sealed in the shell with electrolyte; Electrode assemblie 100 comprises positive plate 101, negative plate 102 that the rolling winding is put and the barrier film 103 that is used to separate positive plate 101 and negative plate 102, and positive plate 101 comprises a collector 111, is coated in the conductive adhesive layer 112 on this collector 111 and is coated in the active positive electrode material layer 113 on the conductive adhesive layer 112, and negative plate 102 comprises a collector 121, is coated in the conductive adhesive layer 122 on this collector 121 and is coated in the negative electrode active material layer 123 on the conductive adhesive layer 122.
Active positive electrode material can use any one material in existing any cobalt acid lithium, LiFePO4, LiMn2O4, lithium nickelate, manganese cobalt binary, nickel manganese binary, nickel cobalt binary or the nickel manganese cobalt ternary material, perhaps uses the composite material of any two kinds or three kinds in the above-mentioned material; Negative electrode active material uses Delanium or native graphite or soft carbon or hard carbon material; Electrolyte adopt contain EMC wait the material of organic solvent and hexafluorophosphoric acid lithium salts, sulfonate, chlorate.
Battery is made flow process:
Collection liquid surface is handled, and---------------both positive and negative polarity is cut, and------positive/negative plate is reeled (lamination), and---------fluid injection---changes into---high temperature polymerization---vacuum seal---capacity sorting---finished product to coating positive and negative electrode active material to the collector coating conductive glue in baking in encapsulation in the both positive and negative polarity film-making in the both positive and negative polarity press polish in the both positive and negative polarity baking.
The test contrast
The lithium ion battery that provides two kinds of structures now is to carry out the instance test relatively; Battery capacity is 22Ah, all adopts the takeup type structure, and identical materials is: the positive plate collector uses aluminium foil; The negative plate collector uses Copper Foil; Anode active material layer is used LiFePO4, and anode active material layer is used Delanium, and barrier film uses 25 μ m polyethylene, polypropylene composite diaphragm.
The application's battery: conductive adhesive layer comprises ground floor crystalline flake graphite conductive adhesive layer, second layer carbon black conductive glue-line, and the 3rd layer of CNT conductive adhesive layer, binding agent is a pentacene, and solvent uses NMP, and the conductive adhesive layer gross thickness is 10 μ m.
Control cell: conductive adhesive layer all is not set on the positive/negative plate.
Table one
Visible by table one, experimental result: the capacity and the conventional batteries of the lithium ion battery of the utility model are as good as, and 5000 residual capacities of normal temperature cycle life are more than 85%, and 60 ℃ of cycle lives can reach 3000 residual capacities more than 80%; The security performance test all can be passed through, and significantly is being superior to conventional batteries aspect quick charge and the heavy-current discharge performance.
The utility model is not limited to the foregoing description, based on simple replacement the foregoing description, that do not make creative work, should belong to the scope that the utility model discloses.
Claims (5)
1. an electrodes of lithium-ion batteries is characterized in that, comprises collector, is coated in the conductive adhesive layer on the collector and is coated in the electrode active material layers on the conductive adhesive layer.
2. lithium ion pole piece according to claim 1 is characterized in that, the thickness of said conductive adhesive layer is 0.1 μ m～10 μ m.
3. lithium ion pole piece according to claim 1 is characterized in that, said collector is aluminium foil or Copper Foil or nickel screen.
4. lithium ion pole piece according to claim 1 is characterized in that, the thickness of said collector is 5-30 μ m.
5. lithium ion battery; Comprise electrode assemblie, electrolyte and shell; Said electrode assemblie and said electrolyte are sealed in the said shell; Said electrode assemblie comprises positive plate, negative plate, it is characterized in that, said positive plate and said negative plate include collector, are coated in the conductive adhesive layer on the collector and are coated in the electrode active material layers on the conductive adhesive layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204254418U CN202474091U (en) | 2011-10-31 | 2011-10-31 | Lithium ion battery pole piece and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204254418U CN202474091U (en) | 2011-10-31 | 2011-10-31 | Lithium ion battery pole piece and lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202474091U true CN202474091U (en) | 2012-10-03 |
Family
ID=46922231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204254418U Expired - Lifetime CN202474091U (en) | 2011-10-31 | 2011-10-31 | Lithium ion battery pole piece and lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202474091U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104465126A (en) * | 2014-11-13 | 2015-03-25 | 超威电源有限公司 | Composite current collector resistant to corrosion and high in electroconductivity and manufacturing method thereof |
| CN104752684A (en) * | 2013-12-31 | 2015-07-01 | 比亚迪股份有限公司 | Negative plate and preparation method thereof as well as lithium ion secondary battery using same |
| CN105680053A (en) * | 2016-03-25 | 2016-06-15 | 江苏富朗特新能源有限公司 | Positive/negative pole roll stocked with insulation layer for lithium ion battery |
| CN106410209A (en) * | 2016-10-18 | 2017-02-15 | 深圳市河科科技有限公司 | Silver-gray electroconductive slurry for lithium battery current collector and its preparation method and use |
| CN107316977A (en) * | 2017-06-07 | 2017-11-03 | 天津市捷威动力工业有限公司 | A kind of Novel lithium ion power battery negative pole and lithium-ion-power cell |
| CN108134128A (en) * | 2017-12-25 | 2018-06-08 | 北京小米移动软件有限公司 | The battery core and polymer Li-ion battery of polymer Li-ion battery |
| CN109659564A (en) * | 2018-12-24 | 2019-04-19 | 珠海光宇电池有限公司 | A kind of negative electrode tab and preparation method thereof reducing lithium ion battery impedance |
| CN111554927A (en) * | 2019-02-12 | 2020-08-18 | 丰田自动车株式会社 | Laminated body |
-
2011
- 2011-10-31 CN CN2011204254418U patent/CN202474091U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104752684A (en) * | 2013-12-31 | 2015-07-01 | 比亚迪股份有限公司 | Negative plate and preparation method thereof as well as lithium ion secondary battery using same |
| CN104465126A (en) * | 2014-11-13 | 2015-03-25 | 超威电源有限公司 | Composite current collector resistant to corrosion and high in electroconductivity and manufacturing method thereof |
| CN104465126B (en) * | 2014-11-13 | 2017-06-06 | 超威电源有限公司 | A kind of anti-corrosion electric conducting composite current collector high and its manufacture method |
| CN105680053A (en) * | 2016-03-25 | 2016-06-15 | 江苏富朗特新能源有限公司 | Positive/negative pole roll stocked with insulation layer for lithium ion battery |
| CN106410209A (en) * | 2016-10-18 | 2017-02-15 | 深圳市河科科技有限公司 | Silver-gray electroconductive slurry for lithium battery current collector and its preparation method and use |
| CN107316977A (en) * | 2017-06-07 | 2017-11-03 | 天津市捷威动力工业有限公司 | A kind of Novel lithium ion power battery negative pole and lithium-ion-power cell |
| CN108134128A (en) * | 2017-12-25 | 2018-06-08 | 北京小米移动软件有限公司 | The battery core and polymer Li-ion battery of polymer Li-ion battery |
| CN108134128B (en) * | 2017-12-25 | 2020-08-11 | 北京小米移动软件有限公司 | Battery core of polymer lithium ion battery and polymer lithium ion battery |
| CN109659564A (en) * | 2018-12-24 | 2019-04-19 | 珠海光宇电池有限公司 | A kind of negative electrode tab and preparation method thereof reducing lithium ion battery impedance |
| CN111554927A (en) * | 2019-02-12 | 2020-08-18 | 丰田自动车株式会社 | Laminated body |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202474091U (en) | Lithium ion battery pole piece and lithium ion battery | |
| WO2020177623A1 (en) | Negative pole piece, secondary battery and apparatus thereof | |
| CN111313089B (en) | Preparation method of ion conductor/polyethylene oxide composite solid electrolyte based on ultraviolet crosslinking | |
| CN106602129B (en) | A kind of polyion battery and preparation method thereof | |
| CN104681820A (en) | Lithium ion battery current collector and lithium ion battery | |
| CN102082290A (en) | High-voltage high-energy-density lithium ion battery and manufacturing method thereof | |
| CN101630728A (en) | High energy density lithium secondary battery electrode and preparation method thereof | |
| CN102306755B (en) | Capacitor-battery bipolar inline combined nickel-hydrogen power capacitor battery | |
| CN104953186A (en) | Preparation technology of lithium ion battery and negative lithium supplementing device | |
| CN106169617A (en) | A kind of space safety high power lithium ion accumulator | |
| CN102157753A (en) | Fast-charging high-power winding column type lithium ion battery | |
| CN111211323A (en) | Soft package lithium ion battery of lithium iron phosphate system and preparation method thereof | |
| CN105742695A (en) | Lithium-ion battery and preparation method thereof | |
| CN103022566A (en) | Soaking method for isolating membrane of ceramic isolating membrane lithium ion battery | |
| CN114744294A (en) | Electrochemical device and electronic device | |
| CN103427084A (en) | Positive electrode sizing agent of ultralow-temperature lithium battery and ultralow-temperature lithium battery | |
| CN113594464A (en) | Electrochemical device and electronic device | |
| CN109244531A (en) | A kind of high purity copper matrix graphite alkene composite lithium ion cell and preparation method thereof | |
| CN218867198U (en) | Battery and electric equipment | |
| CN207459090U (en) | A kind of lithium ion battery | |
| CN202384420U (en) | Diaphragm for lithium ion batteries and lithium ion battery | |
| CN102299375B (en) | Lithium ion power battery and preparation method thereof | |
| CN102709587B (en) | A kind of lithium ion battery and cathode current collector thereof | |
| CN102779974B (en) | Nano cell and process this nano cell manufacture method | |
| CN205050932U (en) | Positive plate and battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 209 No. 519000 Guangdong province Zhuhai city Doumen District Xinqing Science and Technology Industrial Park, Mount Everest Boulevard Patentee after: Zhuhai Guanyu Battery Co.,Ltd. Address before: 209 No. 519000 Guangdong province Zhuhai city Doumen District Xinqing Science and Technology Industrial Park, Mount Everest Boulevard Patentee before: ZHUHAI COSLIGHT BATTERY Co.,Ltd. Address after: 209 No. 519000 Guangdong province Zhuhai city Doumen District Xinqing Science and Technology Industrial Park, Mount Everest Boulevard Patentee after: ZHUHAI COSLIGHT BATTERY Co.,Ltd. Address before: 209 No. 519000 Guangdong province Zhuhai city Doumen District Xinqing Science and Technology Industrial Park, Mount Everest Boulevard Patentee before: ZHUHAI COSLIGHT BATTERY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121003 |
|
| CX01 | Expiry of patent term |