CN205846132U - A kind of porous polyimide negative pole lithium ion battery with high energy density battery core - Google Patents
A kind of porous polyimide negative pole lithium ion battery with high energy density battery core Download PDFInfo
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- CN205846132U CN205846132U CN201620762334.7U CN201620762334U CN205846132U CN 205846132 U CN205846132 U CN 205846132U CN 201620762334 U CN201620762334 U CN 201620762334U CN 205846132 U CN205846132 U CN 205846132U
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- Prior art keywords
- negative pole
- porous polyimide
- lithium ion
- energy density
- ion battery
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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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- 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
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Abstract
This utility model relates to field of lithium ion battery, disclose a kind of porous polyimide negative pole lithium ion battery with high energy density battery core, including positive pole, negative pole, electrolyte, described negative pole includes negative current collector, the porous polyimide negative electrode layer (3) being coated on described negative pole currect collecting surface, is coated on the porous ceramic layer (4) on described porous polyimide negative electrode layer surface；The porosity of described porous polyimide negative electrode layer is 5 20%, and aperture is 5 50 microns；Described positive pole and negative pole cross laminates or winding.There is not the loss in initial charge SEI film forming procedure to capacity in lithium ion battery of the present utility model, constantly reparation and the solvent molecule that the most there is not SEI insert altogether and cause battery capacity attenuation problem.Battery does not contains barrier film simultaneously, and volume is little, making is simple, and energy density is high, and safety is good.
Description
Technical field
This utility model relates to field of lithium ion battery, particularly relates to a kind of porous polyimide negative pole high-energy density lithium
Ion battery battery core.
Background technology
Day by day serious along with the problem such as environmental pollution and energy resource consumption, new forms of energy industry obtains the generally pass in the annual world
Note.Lithium ion battery becomes near owing to it has the advantage such as environmental friendliness, energy density is high, have extended cycle life, affordable
Study hotspot over Nian.It is widely used, especially at electric automobile in fields such as number, energy storage, communication, electric motor cars
Field, the rate of rise with annual 50% is being promoted.
Traditional anode material for lithium-ion batteries is generally cobalt acid lithium, LiMn2O4, iron manganese phosphate for lithium, nickle cobalt lithium manganate, nickel
The lithium-containing compound that the electrochemical redox current potentials such as cobalt lithium aluminate are higher, negative pole generally uses material with carbon element, as graphite, hard charcoal,
Soft charcoal etc..But, the gram volume of material with carbon element is relatively low so that the energy density of battery nearly reaches the limit.And in cyclic process with
The reasons such as the most damaged of SEI film and reparation, and the common embedding of solvent molecule, cause battery capacity decay very fast.Novel
Although negative material such as silicon class negative pole, stannum negative pole etc. have higher gram volume, but still cannot avoid loop attenuation problem.
Meanwhile, all including barrier film in existing lithium ion battery, traditional membrane thicknesses is thicker, occupies substantial amounts of body
The energy density of battery that is long-pending, that indirectly affect.And need to isolate both positive and negative polarity at battery apparatus, more take
Time.
Utility model content
In order to solve above-mentioned technical problem, this utility model provides a kind of porous polyimide negative pole high-energy density lithium
Ion battery battery core.This utility model uses the polyimides of high molecular as lithium ion battery negative material, relies on polyamides
Acyl group generation electrochemical oxidation-reduction reaction in imines molecule completes energy transfer.Use polyimides as negative material,
There is not the loss to capacity in graphite type material initial charge SEI film forming procedure, the most there is not constantly repairing and solvent of SEI
Molecule inserts altogether and causes battery capacity attenuation problem.Lithium ion battery the most of the present utility model does not contains barrier film, and volume is little, system
Making simple, energy density is high, and safety is good.
Concrete technical scheme of the present utility model is: a kind of porous polyimide negative pole lithium ion battery with high energy density electricity
Core, including positive pole, negative pole, electrolyte.Described negative pole includes negative current collector, is coated on the porous of described negative pole currect collecting surface
Polyimides negative electrode layer, it is coated on the porous ceramic layer on described porous polyimide negative electrode layer surface；Described porous polyimide
The porosity of negative electrode layer is 5-20%, and aperture is 5-50 micron；Described positive pole and negative pole cross laminates or winding.
Described porous polyimide negative electrode layer is formed by the solidification of polyimides cathode size；Described porous polyimide negative pole
The thickness of layer is 50-200 micron；Described polyimides cathode size includes 70-83 weight portion polyimides, 15-20 weight portion
Conductive agent, 2-10 parts by weight binder, 1-3 weight portion porogen, 40-80 weight parts organic solvent；Wherein polyimides, conduction
The summation of agent and binding agent is 100 weight portions.
Polyimides is a kind of special engineering plastics, its have high temperature resistant (more than 400 DEG C), corrosion-resistant, good mechanical property,
Synthesize simple advantage, containing a large amount of carboxyl groups in its strand, owing to acyl group has many oxidation states, at certain condition
Under, can be with metal ion such as lithium ion, sodium ion generation redox reaction, thus polyimides can be as lithium-ion electric
The negative material in pond.This utility model with conventional lithium ion battery positive electrode as positive pole, using high molecular polyimides as
Negative material, relies on the acyl group generation electrochemical oxidation-reduction reaction in polyimide molecule to complete energy transfer.Use polyamides
As negative material, there is not the loss to capacity in graphite type material initial charge SEI film forming procedure, do not exist in imines
Constantly reparation and the solvent molecule of SEI insert altogether and cause battery capacity attenuation problem.
In this utility model, porous polyimide negative electrode layer is cellular, it is possible to rely on hole Electolyte-absorptive to enter
One step reduces negative electrode lithium ion conduction and hinders.
Meanwhile, uniformly coat the porous ceramic layer of porous in polyimides negative terminal surface, porous ceramic layer substitute tradition every
Film, on the one hand porous ceramic layer has higher porosity, can be with conducting lithium ions, and on the other hand porous ceramic layer serves height
Temperature iris action, when battery core generation internal short-circuit, porous ceramic layer still can intercept both positive and negative polarity bump contact, prevent further
Only battery thermal runaway.Additionally, porous ceramic layer has relatively low thickness, compared with traditional barrier film, use porous ceramic layer will
Battery core volume can be reduced greatly, improve battery core volume energy density.The gram volume of polyimides of the present utility model up to
180-240mAh/g。
Further, in this utility model, porous polyimide negative electrode layer matches with porous ceramic layer, has extra having
Benefit effect: owing to negative pole porous polyimide negative electrode layer is that the binding agent formation in macromolecular material, with ceramic size is stronger
Adhesion, thus porous ceramic layer can be bonded on porous polyimide negative electrode layer closely, will not occur ceramic size
It is coated in coming off or the problem such as dry linting of occurring on tradition negative pole.Just because of porous ceramic layer and porous polyimide negative electrode layer
Can fit closely so that the contact interface between porous ceramic layer and negative pole is more tight, favorably reduces lithium ion conduction
Interface impedance, improve battery rate charge-discharge performance.And porous polyimide negative electrode layer is owing to being plastic material, has more
Good toughness, time in cell fabrication processes by negative pole curling or bending, not easy fracture, the porous ceramic layer being attached on negative pole
It is not easy to come off.
As preferably, described negative current collector is Copper Foil.
As preferably, described negative current collector is the Copper Foil that surface-coated has conductive coating.
Being pre-coated with conductive coating on Copper Foil, conduction priming coat can improve gluing between polyimides and copper foil current collector
Knot effect, and overcome the best shortcoming of polyimides electric conductivity further.
As preferably, the thickness of described Copper Foil is 8-12 micron.
As preferably, the thickness of described conductive coating is 1.5-2.5 micron.
As preferably, the thickness of described porous polyimide negative electrode layer is 50-200 micron；The thickness of described porous ceramic layer
Degree is 5-30 micron.
As preferably, described positive pole includes plus plate current-collecting body, is coated on the positive electrode material layer of described anode collection surface
。
As preferably, the material of described positive electrode material layer selected from cobalt acid lithium, LiMn2O4, iron manganese phosphate for lithium, nickle cobalt lithium manganate,
Nickel cobalt lithium aluminate；Described plus plate current-collecting body is aluminium foil.
As preferably, described aluminum foil thickness is 8-12 micron, and the thickness of described positive electrode material layer is 50-200 micron.
Being compared with the prior art, the beneficial effects of the utility model are:
This utility model uses the polyimides of high molecular as lithium ion battery negative material, relies on polyimides to divide
Acyl group generation electrochemical oxidation-reduction reaction in son completes energy transfer.Use polyimides as negative material, do not exist
Loss to capacity in graphite type material initial charge SEI film forming procedure, the most do not exist SEI constantly repair and solvent molecule altogether
Insert and cause battery capacity attenuation problem.Lithium ion battery the most of the present utility model does not contains barrier film, and volume is little, making is simple
Single, energy density is high, and safety is good.
Accompanying drawing explanation
Fig. 1 is embodiment 1 lithium ion battery cell both positive and negative polarity package assembly schematic diagram；
Fig. 2 is embodiment 2 lithium ion battery cell both positive and negative polarity package assembly schematic diagram.
Reference is: Copper Foil 1, conductive coating 2, porous polyimide negative electrode layer 3, porous ceramic layer 4, plus plate current-collecting body
5, positive electrode material layer 6.
Detailed description of the invention
Below in conjunction with embodiment, the utility model will be further described.
Embodiment 1
A kind of porous polyimide negative pole lithium ion battery with high energy density battery core, including positive pole, negative pole, electrolyte.Institute
State positive pole and negative pole cross laminates.
As it is shown in figure 1, described negative pole include Copper Foil 1, the porous polyimide negative electrode layer 3 being coated on described copper foil surface,
It is coated on the porous ceramic layer 4 on described porous polyimide negative electrode layer surface.Described positive pole includes plus plate current-collecting body 5, is coated on
The positive electrode material layer 6 of described anode collection surface.
Wherein, the thickness of described Copper Foil is 10 microns；The thickness of described porous polyimide negative electrode layer is 125 microns；Institute
The porosity stating porous polyimide negative electrode layer is 12%, and aperture is 5-50 micron；The thickness of described porous ceramic layer is 10 micro-
Rice.
Described plus plate current-collecting body is aluminium foil, and thickness is 10 microns, and the thickness of described positive electrode material layer is 125 microns.Described
The material of positive electrode material layer is LiFePO4.
Embodiment 2
A kind of porous polyimide negative pole lithium ion battery with high energy density battery core, including positive pole, negative pole, electrolyte.Institute
State positive pole and negative pole cross laminates.
As in figure 2 it is shown, described negative pole includes scribbling the Copper Foil 1 of conductive coating 2, being coated on described negative pole currect collecting surface
Porous polyimide negative electrode layer 3, it is coated on the porous ceramic layer 4 on described porous polyimide negative electrode layer surface.Described positive pole bag
Include plus plate current-collecting body 5, be coated on the positive electrode material layer 6 of described anode collection surface.
Wherein, the thickness of described Copper Foil is 10 microns, and the thickness of described conductive coating is 2 microns；Described porous polyamides is sub-
The thickness of amine negative electrode layer is 125 microns；The porosity of described porous polyimide negative electrode layer is 12%, and aperture is 5-50 micron；Institute
The thickness stating porous ceramic layer is 10 microns.
Described plus plate current-collecting body is aluminium foil, and thickness is 10 microns, and the thickness of described positive electrode material layer is 125 microns.Described
The material of positive electrode material layer is LiFePO4.
Embodiment 3
A kind of porous polyimide negative pole lithium ion battery with high energy density battery core, including positive pole, negative pole, electrolyte.Institute
State positive pole and negative pole cross laminates.
Described negative pole includes scribbling the Copper Foil 1 of conductive coating 2, being coated on the porous polyamides Asia of described negative pole currect collecting surface
Amine negative electrode layer 3, it is coated on the porous ceramic layer 4 on described porous polyimide negative electrode layer surface.Described positive pole includes anode collection
Body 5, it is coated on the positive electrode material layer 6 of described anode collection surface.
Wherein, the thickness of described Copper Foil is 8 microns, and the thickness of described conductive coating is 1.5 microns；Described porous polyamides is sub-
The thickness of amine negative electrode layer is 50 microns；The porosity of described porous polyimide negative electrode layer is 5%, and aperture is 5-10 micron；Described
The thickness of porous ceramic layer is 5 microns.
Described plus plate current-collecting body is aluminium foil, and thickness is 8 microns, and the thickness of described positive electrode material layer is 50 microns.Described just
The material of pole material layer is cobalt acid lithium.
Embodiment 4
A kind of porous polyimide negative pole lithium ion battery with high energy density battery core, including positive pole, negative pole, electrolyte.Institute
State positive pole and negative pole cross laminates.
Described negative pole includes scribbling the Copper Foil 1 of conductive coating 2, being coated on the porous polyamides Asia of described negative pole currect collecting surface
Amine negative electrode layer 3, it is coated on the porous ceramic layer 4 on described porous polyimide negative electrode layer surface.Described positive pole includes anode collection
Body 5, it is coated on the positive electrode material layer 6 of described anode collection surface.
Wherein, the thickness of described Copper Foil is 12 microns, and the thickness of described conductive coating is 2.5 microns；Described porous polyamides
The thickness of imines negative electrode layer is 200 microns；The porosity of described porous polyimide negative electrode layer is 20%, and aperture is 5-50 micron；
The thickness of described porous ceramic layer is 30 microns.
Described plus plate current-collecting body is aluminium foil, and thickness is 12 microns, and the thickness of described positive electrode material layer is 200 microns.Described
The material of positive electrode material layer is LiMn2O4.
Raw materials used, equipment in this utility model, unless otherwise noted, is the conventional raw material of this area, equipment；This reality
With novel middle method therefor, unless otherwise noted, it is the conventional method of this area.
The above, be only preferred embodiment of the present utility model, not impose any restrictions this utility model, every
Any simple modification, change and the equivalent transformation made above example according to this utility model technical spirit, all still falls within
The protection domain of technical solutions of the utility model.
Claims (9)
1. a porous polyimide negative pole lithium ion battery with high energy density battery core, including positive pole, negative pole, electrolyte, it is special
Levy and be: described negative pole includes negative current collector, is coated on the porous polyimide negative electrode layer of described negative pole currect collecting surface
(3) porous ceramic layer (4) on described porous polyimide negative electrode layer surface, it is coated on；Described porous polyimide negative electrode layer
Porosity is 5-20%, and aperture is 5-50 micron；Described positive pole and negative pole cross laminates or winding.
2. a kind of porous polyimide negative pole lithium ion battery with high energy density battery core as claimed in claim 1, its feature exists
In, described negative current collector is Copper Foil (1).
3. a kind of porous polyimide negative pole lithium ion battery with high energy density battery core as claimed in claim 1, its feature exists
In, described negative current collector is the Copper Foil (1) that surface-coated has conductive coating (2).
4. a kind of porous polyimide negative pole lithium ion battery with high energy density battery core, its feature
Being, the thickness of described Copper Foil is 8-12 micron.
5. a kind of porous polyimide negative pole lithium ion battery with high energy density battery core as claimed in claim 3, its feature exists
In, the thickness of described conductive coating is 1.5-2.5 micron.
6. a kind of porous polyimide negative pole lithium ion battery with high energy density battery core as claimed in claim 1, its feature exists
In, the thickness of described porous polyimide negative electrode layer is 50-200 micron；The thickness of described porous ceramic layer is 5-30 micron.
7. a kind of porous polyimide negative pole lithium ion battery with high energy density battery core as claimed in claim 1, its feature exists
In, described positive pole includes plus plate current-collecting body (5), is coated on the positive electrode material layer (6) of described anode collection surface.
8. a kind of porous polyimide negative pole lithium ion battery with high energy density battery core as claimed in claim 7, its feature exists
In, the material of described positive electrode material layer is selected from cobalt acid lithium, LiMn2O4, iron manganese phosphate for lithium, nickle cobalt lithium manganate, nickel cobalt lithium aluminate；Institute
Stating plus plate current-collecting body is aluminium foil.
9. a kind of porous polyimide negative pole lithium ion battery with high energy density battery core as claimed in claim 8, its feature exists
In, described aluminum foil thickness is 8-12 micron, and the thickness of described positive electrode material layer is 50-200 micron.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620762334.7U CN205846132U (en) | 2016-07-19 | 2016-07-19 | A kind of porous polyimide negative pole lithium ion battery with high energy density battery core |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620762334.7U CN205846132U (en) | 2016-07-19 | 2016-07-19 | A kind of porous polyimide negative pole lithium ion battery with high energy density battery core |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106847507A (en) * | 2017-03-22 | 2017-06-13 | 中国工程物理研究院化工材料研究所 | A kind of ultra-thin impulse capacitor and preparation method thereof |
| CN113097568A (en) * | 2021-03-30 | 2021-07-09 | 宁德新能源科技有限公司 | Electrochemical device and electronic device using the same |
-
2016
- 2016-07-19 CN CN201620762334.7U patent/CN205846132U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106847507A (en) * | 2017-03-22 | 2017-06-13 | 中国工程物理研究院化工材料研究所 | A kind of ultra-thin impulse capacitor and preparation method thereof |
| CN106847507B (en) * | 2017-03-22 | 2019-04-23 | 中国工程物理研究院化工材料研究所 | A kind of ultra-thin impulse capacitor and preparation method thereof |
| CN113097568A (en) * | 2021-03-30 | 2021-07-09 | 宁德新能源科技有限公司 | Electrochemical device and electronic device using the same |
| CN113097568B (en) * | 2021-03-30 | 2022-09-02 | 宁德新能源科技有限公司 | Electrochemical device and electronic device using the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161228 Termination date: 20200719 |