CN105895857A - Positive plate of high-energy power lithium battery - Google Patents
Positive plate of high-energy power lithium battery Download PDFInfo
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- CN105895857A CN105895857A CN201410739974.1A CN201410739974A CN105895857A CN 105895857 A CN105895857 A CN 105895857A CN 201410739974 A CN201410739974 A CN 201410739974A CN 105895857 A CN105895857 A CN 105895857A
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- lithium
- material layer
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- positive plate
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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
The invention discloses a positive plate of a high-energy power lithium battery. The positive plate comprises an aluminum foil, ternary material layers and lithium-manganese-iron-phosphate material layers. The adhesivity between the ternary material layers and the aluminum foil is high, the side reaction between the ternary materials and an electrolyte is also reduced by lithium-manganese-iron-phosphate at the outer layers, so that a gas generation phenomenon of the battery is reduced, the volume expansion of the ternary materials during the charging-discharging process is limited, and the structural stability is maintained; meanwhile, the lithium-manganese-iron-phosphate has good high-voltage resistance, and the battery can be prevented from being over-charged; the design of a dual-coating structure of the lithium-manganese-iron-phosphate and the ternary materials is adopted, the low-temperature performance of the ternary materials and the cycle performance of the lithium-manganese-iron-phosphate are combined, the thermal diffusion due to short circuit can be effectively relieved by the lithium-manganese-iron-phosphate at the outer layers in a needling test, thermal runaway is avoided, and the safety performance of the positive plate is improved.
Description
[technical field]
The present invention relates to field of lithium, particularly relate to a kind of high-energy dynamic lithium battery positive plate.
[background technology]
Along with wideling popularize of new-energy automobile, the demand of electrokinetic cell increases day by day.Compare lead-acid battery,
Ni-MH battery, nickel-cadmium cell, it is all that lithium battery has that running voltage is high, energy density big, has extended cycle life etc.
Many advantages, occupy the higher market share in electrokinetic cell field.And in dynamic lithium battery field, iron phosphate
Lithium and ternary material are each has something to recommend him, and LiFePO4 is that the battery security of positive pole is good, has extended cycle life, but
Running voltage is on the low side, and energy density need to improve；Ternary material is that the battery operating voltage of positive pole is high, energy
Metric density is high, but on the high side, and safety need to improve, and particularly ternary material battery is initially following
In ring, between ternary material surface and electrolyte, there is side reaction, the decomposition of electrolyte can be caused and aerogenesis,
In cyclic process, HF produced by electrolyte produces corrosion to ternary material, thus destroys its structure, impact electricity
Pond cyclical stability and high rate performance, simultaneously in lancing test, occur inside battery core that short circuit causes local temperature
Degree raises rapidly, and this high temperature can cause ternary material structural deterioration and releasing oxygen, easily causes electrolyte
Burn with barrier film, thus cause thermal runaway.Although currently some enterprise is by using LiFePO4And tri compound
Positive electrode, can reduce the cost of battery to a certain extent, improve cycle life, but reduce battery
Running voltage, and energy density is the most on the low side.
In view of this, it is necessary in fact to provide a kind of high-energy dynamic lithium battery positive plate to overcome drawbacks described above.
[summary of the invention]
It is an object of the invention to provide a kind of high-energy dynamic lithium battery positive plate, it is close that it not only improves energy
Degree, cycle life, moreover it is possible to effectively alleviate the side reaction between ternary material and electrolyte, reduce in electrolyte
The HF erosion to ternary material, protect material structure, suppress electrolyte decomposition under high voltages, thus
Improve the chemical property of battery.
To achieve these goals, the present invention is just adopting the following technical scheme that a kind of high-energy dynamic lithium battery
Pole piece, it includes aluminium foil, ternary material layer, iron manganese phosphate lithium material layer, and described ternary material layer is coated on
On aluminium foil, described iron manganese phosphate lithium material layer is coated on ternary material layer, and described ternary material layer is
Tertiary cathode material, conduction charcoal and the homogeneous mixture of binding agent, described iron manganese phosphate lithium material layer is phosphoric acid
Ferromanganese lithium, conduction charcoal and the homogeneous mixture of binding agent.
As a kind of improvement of the present invention a kind of high-energy dynamic lithium battery positive plate, in described ternary material layer
Ternary material be nickel-cobalt-manganese ternary LiNixCoyMn1-x-yO2With nickel cobalt aluminum ternary LiNi0.85Co0.1Al0.05O2In extremely
Few one, wherein, 0 ＜ x ＜ 1,0 ＜ y ＜ 1, x+y ＜ 1.
As a kind of improvement of the present invention a kind of high-energy dynamic lithium battery positive plate, described iron manganese phosphate for lithium material
Iron manganese phosphate for lithium chemical general formula in the bed of material is LiMn1-xFexPO4, wherein 0 ＜ x ＜ 1, described conduction charcoal is for leading
At least one in electro-graphitic, white carbon black, CNT and Graphene；Described binding agent is polyvinylidene fluoride
PVDF。
Owing to the adhesiveness between ternary material layer and aluminium foil is good, and the iron manganese phosphate for lithium of outer layer reduces three
Side reaction between unit's material and electrolyte, thus decrease the aerogenesis phenomenon of battery, limit ternary material
Volumetric expansion in charge and discharge process, and maintain its Stability Analysis of Structures.Meanwhile, iron manganese phosphate for lithium has again resistance to height
The advantage that pressure property is good, is avoided that over-charging of battery.The double coating structures using iron manganese phosphate for lithium and ternary material set
Meter, combines the cryogenic property of ternary material and the cycle performance of iron manganese phosphate for lithium, under lancing test, outward
Layer iron manganese phosphate for lithium can effectively delay the diffusion of short circuit heat, it is to avoid thermal runaway, thus promotes its security performance.
[accompanying drawing explanation]
Fig. 1 is double coating positive plate structural representations of the present invention a kind of high-energy dynamic lithium battery positive plate；
Fig. 2 is that the electric discharge of the lithium-ion-power cell of the present invention a kind of high-energy dynamic lithium battery positive plate is bent
Line and energy density profile；
Fig. 3 is the present invention a kind of high-energy dynamic lithium battery positive plate discharge curve at different temperatures；
Fig. 4 is the present invention a kind of high-energy dynamic lithium battery positive plate discharge curve under different multiplying；
Fig. 5 is the cyclic curve of the present invention a kind of high-energy dynamic lithium battery positive plate.
[detailed description of the invention]
Refer to shown in Fig. 1, below in conjunction with case study on implementation, the invention will be further described.
Embodiment is as follows:
1) ternary material layer is with nickel cobalt aluminum ternary: conductive agent: be proportioning slurrying at PVDF=96: 2: 2, and solvent is N-
Methyl pyrrolidone NMP, first joins PVDF stirring 2h in NMP and is completely dispersed dissolving, add and lead
Electricity agent dispersed with stirring 2h, is eventually adding ternary material dispersed with stirring 4h, is properly added NMP and regulates slurry viscosity
For 8000-10000mpa s, two-sided at aluminium foil is coated tertiary cathode slurry and dries, through 1.5MPa pressure
Ternary material layer is obtained after roll-in；
2) iron manganese phosphate lithium material layer is with iron manganese phosphate for lithium: conductive agent: be proportioning slurrying at PVDF=92: 4: 4, molten
Agent is N-Methyl pyrrolidone NMP, first PVDF joins stirring 2h in NMP and is completely dispersed dissolving,
Add conductive agent dispersed with stirring 2h, be eventually adding iron manganese phosphate for lithium dispersed with stirring 4h, be properly added NMP and adjust
Joint slurry viscosity is 4000-6000mpa s, and iron manganese phosphate for lithium slurry is coated in ternary material layer surface, warp
Iron manganese phosphate lithium material layer is obtained after 3.0MPa pressure roll-in；
3) positive plate of high-energy dynamic lithium battery is prepared after coated pole piece is carried out cut-parts, point bar.
Its operation principle: owing to the adhesiveness between ternary material layer and aluminium foil is good, and the iron manganese phosphate of outer layer
Lithium reduces again the side reaction between ternary material and electrolyte, thus decreases the aerogenesis phenomenon of battery, limit
Make ternary material volumetric expansion in charge and discharge process, and maintain its Stability Analysis of Structures.Meanwhile, iron manganese phosphate
Lithium has again the advantage that barotolerance is good, is avoided that over-charging of battery.Use iron manganese phosphate for lithium and ternary material
Double coating structures design, and combine the cryogenic property of ternary material and the cycle performance of iron manganese phosphate for lithium, at pin
Under thorn test, outer layer iron manganese phosphate for lithium can effectively delay the diffusion of short circuit heat, it is to avoid thermal runaway, thus promotes
Its security performance.
One high-energy dynamic lithium battery positive plate of the present invention, is not restricted in description and embodiment
Described, for the personnel of familiar field, therefore it is easily achieved additional advantage and amendment, therefore
In the case of the spirit and scope of the general concept limited without departing substantially from claim and equivalency range, the present invention
Be not limited to specific details, representational equipment and shown here as with describe examples shown.
Claims (3)
1. a high-energy dynamic lithium battery positive plate, it includes aluminium foil, ternary material layer, iron manganese phosphate
Lithium material layer, described ternary material layer is coated on aluminium foil, and described iron manganese phosphate lithium material layer is coated on three
Unit material layer on, it is characterised in that: described ternary material layer be tertiary cathode material, conduction charcoal and
The homogeneous mixture of binding agent, described iron manganese phosphate lithium material layer is iron manganese phosphate for lithium, conduction charcoal and binding agent
Homogeneous mixture.
A kind of high-energy dynamic lithium battery positive plate the most according to claim 1, its feature exists
In: the ternary material in described ternary material layer is nickel-cobalt-manganese ternary LiNixCoyMn1-x-yO2With nickel cobalt aluminum ternary
LiNi0.85Co0.1Al0.05O2In at least one, wherein, 0 ＜ x ＜ 1,0 ＜ y ＜ 1, x+y ＜ 1.
A kind of high-energy dynamic lithium battery positive plate the most according to claim 1, its feature exists
In: the iron manganese phosphate for lithium chemical general formula in described iron manganese phosphate lithium material layer is LiMn1-xFexPO4, wherein 0 ＜ x
＜ 1, described conduction charcoal is at least one in electrically conductive graphite, white carbon black, CNT and Graphene；Described
Binding agent is polyvinylidene fluoride PVDF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410739974.1A CN105895857A (en) | 2014-11-24 | 2014-11-24 | Positive plate of high-energy power lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410739974.1A CN105895857A (en) | 2014-11-24 | 2014-11-24 | Positive plate of high-energy power lithium battery |
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| Publication Number | Publication Date |
|---|---|
| CN105895857A true CN105895857A (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410739974.1A Pending CN105895857A (en) | 2014-11-24 | 2014-11-24 | Positive plate of high-energy power lithium battery |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111370697A (en) * | 2020-03-02 | 2020-07-03 | 沁新集团(天津)新能源技术研究院有限公司 | Lithium manganese iron phosphate/carbon-coated ternary material, preparation method thereof, lithium ion battery anode and lithium ion battery |
| CN112038580A (en) * | 2020-08-18 | 2020-12-04 | 天津力神电池股份有限公司 | Preparation method of lithium ion battery pole piece with special structure |
| CN113594412A (en) * | 2021-08-10 | 2021-11-02 | 星恒电源股份有限公司 | Lithium battery positive plate with sandwich structure and lithium battery |
| CN113921769A (en) * | 2021-08-18 | 2022-01-11 | 浙江南都电源动力股份有限公司 | Composite positive pole piece and preparation method and application thereof |
| US11228028B2 (en) | 2017-12-27 | 2022-01-18 | Industrial Technology Research Institute | Cathode of lithium ion battery |
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| CN101635344A (en) * | 2008-07-24 | 2010-01-27 | 东莞新能源科技有限公司 | Anode pole piece of secondary lithium ion battery and preparation method thereof |
| CN102412388A (en) * | 2011-11-03 | 2012-04-11 | 湖南丰源业翔晶科新能源股份有限公司 | Pole piece used for ternary material lithium ion battery anode and its coating method |
| CN102769131A (en) * | 2012-05-10 | 2012-11-07 | 浙江瓦力新能源科技有限公司 | Method for preparing manganese phosphate lithium / carbon composite material |
| CN102874789A (en) * | 2012-10-22 | 2013-01-16 | 苏州大学 | Lithium ion battery anode material lithium iron manganese phosphate and preparation method thereof |
| CN104134815A (en) * | 2013-07-19 | 2014-11-05 | 中航锂电（洛阳）有限公司 | Mixed positive electrode material and application thereof |
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2014
- 2014-11-24 CN CN201410739974.1A patent/CN105895857A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101635344A (en) * | 2008-07-24 | 2010-01-27 | 东莞新能源科技有限公司 | Anode pole piece of secondary lithium ion battery and preparation method thereof |
| CN102412388A (en) * | 2011-11-03 | 2012-04-11 | 湖南丰源业翔晶科新能源股份有限公司 | Pole piece used for ternary material lithium ion battery anode and its coating method |
| CN102769131A (en) * | 2012-05-10 | 2012-11-07 | 浙江瓦力新能源科技有限公司 | Method for preparing manganese phosphate lithium / carbon composite material |
| CN102874789A (en) * | 2012-10-22 | 2013-01-16 | 苏州大学 | Lithium ion battery anode material lithium iron manganese phosphate and preparation method thereof |
| CN104134815A (en) * | 2013-07-19 | 2014-11-05 | 中航锂电（洛阳）有限公司 | Mixed positive electrode material and application thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11228028B2 (en) | 2017-12-27 | 2022-01-18 | Industrial Technology Research Institute | Cathode of lithium ion battery |
| CN111370697A (en) * | 2020-03-02 | 2020-07-03 | 沁新集团(天津)新能源技术研究院有限公司 | Lithium manganese iron phosphate/carbon-coated ternary material, preparation method thereof, lithium ion battery anode and lithium ion battery |
| CN111370697B (en) * | 2020-03-02 | 2021-10-26 | 沁新集团(天津)新能源技术研究院有限公司 | Lithium manganese iron phosphate/carbon-coated ternary material, preparation method thereof, lithium ion battery anode and lithium ion battery |
| CN112038580A (en) * | 2020-08-18 | 2020-12-04 | 天津力神电池股份有限公司 | Preparation method of lithium ion battery pole piece with special structure |
| CN113594412A (en) * | 2021-08-10 | 2021-11-02 | 星恒电源股份有限公司 | Lithium battery positive plate with sandwich structure and lithium battery |
| CN113921769A (en) * | 2021-08-18 | 2022-01-11 | 浙江南都电源动力股份有限公司 | Composite positive pole piece and preparation method and application thereof |
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Application publication date: 20160824 |
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