CN106935859A - A kind of novel rare-earth richness magnesium-based lithium-ion-power cell - Google Patents
A kind of novel rare-earth richness magnesium-based lithium-ion-power cell Download PDFInfo
- Publication number
- CN106935859A CN106935859A CN201710086431.8A CN201710086431A CN106935859A CN 106935859 A CN106935859 A CN 106935859A CN 201710086431 A CN201710086431 A CN 201710086431A CN 106935859 A CN106935859 A CN 106935859A
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- Prior art keywords
- pole piece
- ion
- power cell
- richness magnesium
- magnesium
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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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
-
- 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
-
- 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 belongs to technical field of lithium ion, it is related to a kind of novel rare-earth richness magnesium-based lithium-ion-power cell.The battery includes the battery case filled with electrolyte and anode pole piece and cathode pole piece in battery case, and barrier film is provided between anode pole piece and cathode pole piece.The anode sizing agent coating of anode pole piece dual coating including plus plate current-collecting body and on plus plate current-collecting body, contains the rare earth richness magnesium-based powder that quality proportioning is 1~5% in anode sizing agent coating.The present invention solves the technical problem of existing lithium ion battery poor performance at low temperatures.The present invention in anode pole piece by adding rare earth richness magnesium-based powder, discharge capacity of the lithium ion battery at 40 DEG C greatly improved, make lithium ion battery under 40 DEG C of low temperature environment also can normal work, expand range of application of the lithium ion battery in fields such as Aero-Space, military project, electric motor cars.
Description
Technical field
The invention belongs to technical field of lithium ion, it is related to a kind of novel rare-earth richness magnesium-based lithium-ion-power cell.
Background technology
Lithium ion battery has that specific capacity is big, operating voltage is high, has extended cycle life, memory-less effect, environmental pollution are small etc.
Advantage, from early 1990s be commercialized since, soon substitute NI-G and Ni-MH battery, be widely used in mobile phone,
In the portable electronics such as notebook computer, video camera.
In fields such as Aero-Space, military project, electric motor cars, it is desirable to battery can at -40 DEG C of even lower temperature normal work
Make.But the cryogenic property of current lithium ion battery is poor, and at -10 DEG C, capacity and operating voltage can be reduced substantially, at -20 DEG C
Performance can substantially deteriorate, specific discharge capacity rapid drawdown, constrain its further applying in above-mentioned field.
The content of the invention
In order to solve the technical problem of existing lithium ion battery poor performance at low temperatures, it is rich that the present invention provides a kind of novel rare-earth
Magnesium-based lithium-ion-power cell.
Technical solution of the invention is：A kind of novel rare-earth richness magnesium-based lithium-ion-power cell, including filled with electricity
The battery case and anode pole piece and cathode pole piece in battery case of liquid are solved, is set between anode pole piece and cathode pole piece
There is barrier film；It is characterized in that：The anode pole piece includes plus plate current-collecting body and dual coating is being just on plus plate current-collecting body
Pole slurry coating, contains the rare earth richness magnesium-based powder that quality proportioning is 1~5% in the anode sizing agent coating.
The component and quality proportioning of above-mentioned anode sizing agent coating be：91~96% positive active material, 1~5% it is dilute
Native richness magnesium-based powder, the binding agent B of 2~6% conductive agent A and 1~5%.
Above-mentioned rare earth richness magnesium-based powder be scandium oxide, yittrium oxide, lanthana, cerium oxide, praseodymium oxide, ytterbium oxide, titanium oxide,
One or more mixed powders with magnesia in zirconium oxide.
Above-mentioned positive active material is the one kind or several in LiMn2O4, LiFePO4, cobalt acid lithium and nickel-cobalt-manganese ternary material
Kind.
Above-mentioned conductive agent A is one or more in conductive black, crystalline flake graphite and CNT；The binding agent B is
Kynoar.
It is 1-METHYLPYRROLIDONE to prepare the solvent that the anode sizing agent coating used.
The cathode size coating of above-mentioned cathode pole piece dual coating including negative current collector and on negative current collector；It is described
The component and quality proportioning of cathode size coating be：90~95% negative electrode active material, 1~5% conductive agent C and 2~8%
Binding agent D.
Above-mentioned negative electrode active material is one or more in native graphite, carbonaceous mesophase spherules and Delanium.
Above-mentioned conductive agent C is one or more in conductive black, crystalline flake graphite and CNT；The binding agent D is
One or more in Kynoar, sodium carboxymethylcellulose and butadiene-styrene rubber.
Solvent that the cathode size coating used is prepared in 1-METHYLPYRROLIDONE, deionized water and absolute ethyl alcohol
One or more.
The beneficial effects of the present invention are：The present invention is significantly carried by adding rare earth richness magnesium-based powder in anode pole piece
Discharge capacity of the lithium ion battery at -40 DEG C high, makes the lithium ion battery also can normal work under -40 DEG C of low temperature environment
Make, expand range of application of the lithium ion battery in fields such as Aero-Space, military project, electric motor cars.
Specific embodiment
The invention provides one kind can at low ambient temperatures (- 40 DEG C) holding excellent properties lithium ion battery, including：Electricity
Pond shell, anode pole piece, cathode pole piece, barrier film and electrolyte.Anode pole piece includes plus plate current-collecting body and is coated on positive pole collection
The anode sizing agent coating of fluid both sides, cathode pole piece includes negative current collector and is coated on the negative pole slurry of negative current collector both sides
Material coating.Wherein, plus plate current-collecting body can select aluminium foil, and negative current collector can be from Copper Foil, the shape and electrolyte of battery
Species be not construed as limiting, can as needed select usual manner of the prior art.
Specifically, anode sizing agent be by positive active material, rare earth richness magnesium-based powder, conductive agent A, binding agent B with it is molten
Agent E is well mixed what is obtained.Wherein：The mass fraction of positive active material is 91~96%, the quality of rare earth richness magnesium-based powder
Fraction is 1~5%, and the mass fraction of conductive agent A is 2~6%, and the mass fraction of binding agent B is 1~5%.
Preferably, positive active material be LiMn2O4, LiFePO4, cobalt acid lithium and nickel-cobalt-manganese ternary material in one kind or
It is several；Rare earth richness magnesium-based powder is scandium oxide, yittrium oxide, lanthana, cerium oxide, praseodymium oxide, ytterbium oxide, titanium oxide, zirconium oxide
In one or more mixed powders with magnesia；Conductive agent A is the one kind in conductive black, crystalline flake graphite and CNT
Or it is several；Binding agent B is Kynoar；Solvent E is 1-METHYLPYRROLIDONE.
Negative electrode active material, conductive agent C, binding agent D are well mixed and obtained by cathode size with solvent F.Wherein：It is negative
The mass fraction of pole active material is that the mass fraction that 90~95%, mass fraction of conductive agent C is 1~5%, binding agent D is 2
~8%.
Preferably, negative electrode active material is one or more in native graphite, carbonaceous mesophase spherules and Delanium；Lead
Electric agent C is one or more in conductive black, crystalline flake graphite and CNT；Binding agent D is Kynoar, carboxymethyl fibre
One or more in the plain sodium of dimension and butadiene-styrene rubber；Solvent F is in 1-METHYLPYRROLIDONE, deionized water and absolute ethyl alcohol
Plant or several.
Technical scheme is further elaborated with reference to specific embodiment.
Embodiment one
Prepare anode sizing agent：Positive active material, rare earth richness magnesium-based powder, conductive agent A, binding agent B and solvent E are mixed
Close, stir, obtain anode sizing agent.Wherein, positive active material, rare earth richness magnesium-based powder, conductive agent A and binding agent B
Mass ratio is 92:3:3:2；Positive active material is LiMn2O4；Rare earth richness magnesium-based powder be scandium oxide, yittrium oxide, titanium oxide and
The mixed powder of magnesia, mass ratio is 3:3:3:1；Conductive agent A is conductive black, crystalline flake graphite and CNT, mass ratio
It is 1:1:1；Binding agent B is Kynoar；Solvent E is 1-METHYLPYRROLIDONE.
Prepare anode pole piece：Anode sizing agent is homogeneously applied to the two sides of aluminium foil, after dry out solvent, according to regulation size
Cut out, and roll-in pole piece is to specific thickness, is positioned over drying in vacuum drying oven.
Prepare cathode size：Negative electrode active material, conductive agent C, binding agent D are mixed with solvent F, is stirred, obtained
Cathode size.Wherein, the mass ratio of negative electrode active material, conductive agent C and binding agent D is 90:4:6；Negative electrode active material is behaved
Make graphite；Conductive agent C is conductive black and CNT, and mass ratio is 1:1；Binding agent D is Kynoar, carboxymethyl cellulose
Plain sodium and butadiene-styrene rubber, mass ratio are 1:2:3；Solvent F is 1-METHYLPYRROLIDONE, deionized water and absolute ethyl alcohol.
Prepare cathode pole piece：Cathode size is homogeneously applied to the two sides of Copper Foil, after dry out solvent, according to regulation size
Cut out, and roll-in pole piece is to specific thickness, is positioned over drying in vacuum drying oven.
Assembling battery：Anode pole piece, barrier film and cathode pole piece are wound into battery core, enter shell, electricity is injected after vacuum drying
Solution liquid, is finally sealed, and the assembling of lithium ion battery is completed after standing.
Embodiment two
Difference with embodiment one is：Rare earth richness magnesium-based powder is the mixed powder of cerium oxide, zirconium oxide and magnesia
Body, mass ratio is 4:3:3, remaining content is identical with embodiment one.
Embodiment three
Difference with embodiment one is：Positive active material, rare earth richness magnesium-based powder, conductive agent A and binding agent B
Mass ratio is 91:4:2:3, the mass ratio of negative electrode active material, conductive agent C and binding agent D is 95:3:2, remaining content with implement
Example one is identical.
Example IV
Difference with embodiment one is：Positive active material is cobalt acid lithium, and negative electrode active material is that mesocarbon is micro-
Ball, remaining content is identical with embodiment one.
Embodiment five
Difference with embodiment one is：Conductive agent A be conductive black, conductive agent C be crystalline flake graphite, remaining content with
Embodiment one is identical.
Embodiment six
Difference with embodiment one is：Binding agent D is Kynoar and sodium carboxymethylcellulose, and mass ratio is 1:
2, solvent F are 1-METHYLPYRROLIDONE and deionized water, and remaining content is identical with embodiment one.
In order to test the low temperature discharge capacity of rare earth richness magnesium-based lithium-ion-power cell of the present invention, the present invention uses embodiment
One technical scheme for providing is prepared for a collection of battery, and it is 1-1#, 1-2#, 1-3# and 1- therefrom to choose four battery number consecutivelies
4#, carries out charge-discharge test under the conditions of normal temperature (25 DEG C) and low temperature (- 40 DEG C) respectively.At the same time, from 2-1#, 2-2#,
Tetra- batteries of 2-3# and 2-4# carry out charge-discharge test under the same conditions as blank control group.Wherein, in blank control group
Four positive poles of battery in do not contain rare earth richness magnesium-based powder, the component of its anode sizing agent is that mass ratio is 95:3:2 just
Pole active material, conductive agent A and binding agent B, other parts are selected and the identical scheme of embodiment one.
The discharge-rate of table 1 is contrasted for the discharge capacity of 0.2C
The discharge-rate of table 2 is contrasted for the discharge capacity of 0.5C
It is dilute in the present invention compared with common lithium-ion-power cell (i.e. blank control group) from Tables 1 and 2
Native richness magnesium-based lithium-ion-power cell shows excellent charge-discharge performance under -40 DEG C of low temperature environment.At -40 DEG C,
Discharging efficiency of the rare earth richness magnesium-based lithium-ion-power cell under different discharge-rates is much high close to being even more than 80%
In the conventional lithium-ion battery without rare earth richness magnesium-based powder.
Claims (10)
1. a kind of novel rare-earth richness magnesium-based lithium-ion-power cell, including the battery case filled with electrolyte and outside battery
Anode pole piece and cathode pole piece in shell, are provided with barrier film between anode pole piece and cathode pole piece；It is characterized in that：The positive pole
The anode sizing agent coating of pole piece dual coating including plus plate current-collecting body and on plus plate current-collecting body, contains in the anode sizing agent coating
There is the rare earth richness magnesium-based powder that quality proportioning is 1~5%.
2. novel rare-earth according to claim 1 richness magnesium-based lithium-ion-power cell, it is characterised in that：The anode sizing agent
The component and quality proportioning of coating be：91~96% positive active material, 1~5% rare earth richness magnesium-based powder, 2~6%
The binding agent B of conductive agent A and 1~5%.
3. novel rare-earth according to claim 1 and 2 richness magnesium-based lithium-ion-power cell, it is characterised in that：The rare earth
Rich magnesium-based powder be scandium oxide, yittrium oxide, lanthana, cerium oxide, praseodymium oxide, ytterbium oxide, titanium oxide, zirconium oxide in one kind or
Several mixed powders with magnesia.
4. novel rare-earth according to claim 2 richness magnesium-based lithium-ion-power cell, it is characterised in that：The positive-active
Material is one or more in LiMn2O4, LiFePO4, cobalt acid lithium and nickel-cobalt-manganese ternary material.
5. novel rare-earth according to claim 4 richness magnesium-based lithium-ion-power cell, it is characterised in that：The conductive agent A
It is one or more in conductive black, crystalline flake graphite and CNT；The binding agent B is Kynoar.
6. novel rare-earth according to claim 5 richness magnesium-based lithium-ion-power cell, it is characterised in that：Prepare the positive pole
The solvent that slurry coating is used is 1-METHYLPYRROLIDONE.
7. novel rare-earth according to claim 1 and 2 richness magnesium-based lithium-ion-power cell, it is characterised in that：The negative pole
The cathode size coating of pole piece dual coating including negative current collector and on negative current collector；The group of the cathode size coating
Divide and quality proportioning is：90~95% negative electrode active material, the binding agent D of 1~5% conductive agent C and 2~8%.
8. novel rare-earth according to claim 7 richness magnesium-based lithium-ion-power cell, it is characterised in that：The negative electrode active
Material is one or more in native graphite, carbonaceous mesophase spherules and Delanium.
9. novel rare-earth according to claim 8 richness magnesium-based lithium-ion-power cell, it is characterised in that：The conductive agent C
It is one or more in conductive black, crystalline flake graphite and CNT；The binding agent D is Kynoar, carboxymethyl fibre
One or more in the plain sodium of dimension and butadiene-styrene rubber.
10. novel rare-earth according to claim 9 richness magnesium-based lithium-ion-power cell, it is characterised in that：Prepare described negative
The solvent that pole slurry coating is used is one or more in 1-METHYLPYRROLIDONE, deionized water and absolute ethyl alcohol.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710086431.8A CN106935859B (en) | 2017-02-17 | 2017-02-17 | Novel rare earth magnesium-rich lithium ion power battery |
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| CN201710086431.8A CN106935859B (en) | 2017-02-17 | 2017-02-17 | Novel rare earth magnesium-rich lithium ion power battery |
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| CN106935859B CN106935859B (en) | 2021-07-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108321429A (en) * | 2018-02-09 | 2018-07-24 | 西安中科爱姆特氢能源有限公司 | A kind of ultralow temperature extended-life lithium ion battery |
| CN108365222A (en) * | 2018-02-09 | 2018-08-03 | 西安中科爱姆特氢能源有限公司 | A kind of ultralow temperature rate lithium ion battery |
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| CN106935859B (en) | 2021-07-27 |
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