CN109309191A - A kind of novel long-life energy storage lithium ion battery pole piece and lithium ion battery - Google Patents
A kind of novel long-life energy storage lithium ion battery pole piece and lithium ion battery Download PDFInfo
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- CN109309191A CN109309191A CN201710619112.9A CN201710619112A CN109309191A CN 109309191 A CN109309191 A CN 109309191A CN 201710619112 A CN201710619112 A CN 201710619112A CN 109309191 A CN109309191 A CN 109309191A
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- pole piece
- lithium ion
- ion battery
- active material
- energy storage
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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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
- 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
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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
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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
- H01M4/64—Carriers or collectors
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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 present invention discloses a kind of novel long-life energy storage lithium ion battery pole piece, including passivation collector, conductive priming coat, active material layer and the inorganic, ceramic layer stacked gradually, wherein, the inorganic, ceramic layer includes binder 25-30% and inorganic ceramic particle 70-75%.The application provides a kind of novel long-life energy storage lithium ion battery pole piece and lithium ion battery, by the way that inorganic, ceramic layer is added in its electrode surface, activation polarization is reduced, so that battery has good recycling performance and longer service life.
Description
Technical field
The present invention relates to technical field of lithium ion, and in particular to a kind of novel long-life energy storage lithium ion battery pole
Piece and lithium ion battery.
Background technique
Today's society population is continuously increased, and economy continues to develop, it is contemplated that the middle period next century, energy demand will be doubled.
Current 90% energy comes from fossil fuel, with the accelerated growth of energy demand, if continuing consumption of fossil fuels, will make
At the accelerated growth of the discharge amounts such as nitric oxide, carbon dioxide, make increasing environmental pollution, greenhouse effects enhancing.
Must tap a new source of energy such as nuclear energy, solar energy, wind energy, water conservancy energy, tide energy and geothermal energy thus, realize the energy
Clean manufacturing.Battery is the important medium for rationally and efficiently using these new energy, such as improves the energy as stored energy source device
Commercial cultivation rate realizes the zero-emission etc. of auto-pollution as the power supply device of electric car, thus using electricity as main energy sources
Modern society in, battery occupies particularly important status in terms of realizing social sustainable development.
Meanwhile in energy-storage system, battery be determine use cost an important factor for one of, this is because energy convert
The general service life of system up to 10 years or more, and at present used in energy-storage battery charge and discharge cycles using after 500 times,
Performance only keeps original 95% or so, and service life is only in 3-4.Therefore, battery is the critical component of whole system, certainly
Determine use cost and economic benefit.
Summary of the invention
In view of this, the application provides a kind of novel long-life energy storage lithium ion battery pole piece and lithium ion battery, lead to
It crosses and inorganic, ceramic layer is added in its electrode surface, reduce activation polarization, so that battery has good recycling
Performance and longer service life.
In order to solve the above technical problems, technical solution provided by the invention is a kind of novel long-life energy storage lithium-ion electric
Pond pole piece and lithium ion battery, including passivation collector, conductive priming coat, active material layer and the inorganic ceramic stacked gradually
Layer, wherein the inorganic, ceramic layer includes binder 25-30% and inorganic ceramic particle 70-75%.
Preferably, the inorganic ceramic particle includes in silicon carbide, silicon nitride, diaspore, boron nitride or diboron trioxide
It is one or more.
Preferably, the inorganic ceramic particle includes one of silicon carbide, silicon nitride or diaspore or a variety of.
Preferably, the inorganic ceramic particle is diaspore.
Preferably, the inorganic ceramic grain diameter is in the range of 0.1 μm -5 μm.
Preferably, the inorganic ceramic grain diameter is in the range of 0.1 μm -2 μm.
Preferably, the passivation collector includes the first passivation collector and the second passivation collector, wherein the first passivation
Collector is through chemistry or electrochemical passivation treated aluminium foil；Second passivation collector is to handle through chemistry or electrochemical passivation
Copper foil afterwards.
Preferably, the conductive priming coat includes binder 40-50%, graphene 25-40% and carbon nanotube 15-
35%.
Preferably, the active material layer includes binder 1-5%, active material 85-95%, graphene 1-5% and carbon
Nanotube 1-5%.
Preferably, the binder includes the first pole piece binder and the second pole piece binder, wherein the first pole piece bonding
Agent includes Kynoar, polyamidoimide, polyacrylonitrile-one of methyl methacrylate or sodium carboxymethylcellulose
Or it is a variety of；The second pole piece binder includes butadiene-styrene rubber, xanthan gum, polyacrylic acid, propylene glycol methyl ether acetate or poly- second
One of enol.
Preferably, the first pole piece binder includes Kynoar, polyamidoimide or sodium carboxymethylcellulose
One of or it is a variety of；The second pole piece binder includes one of butadiene-styrene rubber, xanthan gum or polyacrylic acid or a variety of.
Preferably, the first pole piece binder is Kynoar；The second pole piece binder is butadiene-styrene rubber.
Preferably, the active material includes the first active material and the second active material, wherein the first active material packet
Include one of LiFePO4, cobalt acid lithium or LiMn2O4 or a variety of；Second active material includes graphite, silicon-carbon cathode or lithium
One of barium oxide is a variety of.
Preferably, first active material is LiFePO4；Second active material is graphite.
A kind of novel long-life energy storage lithium ion battery, including the novel long-life energy storage lithium ion battery of above-mentioned one kind
Pole piece.
The present invention provides a kind of novel long-life energy storage lithium ion battery pole piece, including the passivation afflux stacked gradually
Body, conductive priming coat, active material layer and inorganic, ceramic layer, wherein the passivation collector include first be passivated collector and
Second passivation collector, wherein the first passivation collector is through chemistry or electrochemical passivation treated aluminium foil；Second passivation collection
Fluid is through chemistry or electrochemical passivation treated copper foil.Wherein, collector exists by the purpose of chemistry or electrochemical treatments
In the surface area for increasing electrolytic copper foil and electrode aluminium foil improves following for battery to increase the cementability of itself and conductive priming coat
Ring service performance.
Wherein, the conductive priming coat includes binder 40-50%, graphene 25-40% and carbon nanotube 15-35%,
The active material layer includes binder 1-5%, active material 85-95%, graphene 1-5% and carbon nanotube 1-5%.
Wherein, graphene is added in conductive priming coat and active material layer and the purpose of carbon nanotube is, line style two
The graphene of the carbon nanotube and face type two-dimensional structure of tieing up structure realizes the combination in perfect line and face in the liquid phase, to realize
Good conductive network improves the chemical property of battery, meanwhile, carbon nanotube and graphene and active material particle are effectively mixed
After conjunction, three-dimensional network conductive structure can be formed with active material, greatly improve the electric conductivity of active material, further
Gram specific capacity for improving active material plays, and improves the absorbent of pole piece, improves the cycle performance of battery.Wherein, living
Property substance include the first active material and the second active material, wherein the first active material includes LiFePO4, cobalt acid lithium or manganese
One of sour lithium is a variety of；Second active material includes one of graphite, silicon-carbon cathode or lithium-barium oxide or more
Kind.Wherein, in the first active material, LiFePO4 as the application preferred embodiment, which is because, with cobalt acid lithium and mangaic acid
Lithium is compared, and LiFePO4 raw material source is more extensive, and price is more cheap and does not have the problem of any environmental pollution, theoretical
Specific capacity is 170mAh/g, has very high capacity, simultaneously because its lattice stability is good, lithium ion insertion abjection will not be right
Lattice has too big influence, has excellent cycle life and cycle performance, therefore, as the preferred embodiment of the application.Its
In, in the second active material, graphite as the application preferred embodiment, which is because, with silicon-carbon cathode and lithium-barium oxide
It compares, graphite has that electronic conductivity is higher, lithium ion diffusion coefficient is bigger, volume change is more before and after embedding lithium for layer structure
Small, embedding lithium capacity is higher, the embedding more low advantage of lithium point, therefore, as the preferred embodiment of the application.
Wherein, the inorganic ceramic particle includes in silicon carbide, silicon nitride, diaspore, boron nitride or diboron trioxide
It is one or more.Wherein, diaspore is as the preferred embodiment of the application, which is because, other opposite inorganic ceramic particles, water
Aluminium stone has better conductivity of heat, when micro-short circuit local temperature, which occurs, for inside battery increases, can rapidly disperse heat, reduces
Thermal runaway odds.Wherein, the application also proposes that the partial size by inorganic ceramic particle is limited in 0.1 μm -5 μm of range
It is interior, which is because, the size of inorganic ceramic grain diameter largely determines the quality of its performance, partial size is more tiny and equal
It is even, be more conducive to the raising of material property, and when partial size is in 0.1 μm of micron order below, performance reaches unanimity substantially.
Wherein, the binder includes the first pole piece binder and the second pole piece binder, wherein the first pole piece binder
Including Kynoar, polyamidoimide, polyacrylonitrile-one of methyl methacrylate or sodium carboxymethylcellulose or
It is a variety of；The second pole piece binder includes butadiene-styrene rubber, xanthan gum, polyacrylic acid, propylene glycol methyl ether acetate or polyethylene
One of alcohol.Wherein, Kynoar as the application propose the first pole piece binder preferred embodiment, which is because,
In the polymer of polyvinylidene fluoride, fluorine content therein reaches 593%, about 8 times high compared with other binders, thermoplastic poly- inclined
Vinyl fluoride has good chemical stability, temperature characterisitic, mechanical performance and processing performance, therefore, preferably poly- in this application
Vinylidene is as the first pole piece binder.Wherein, butadiene-styrene rubber proposes the preferred side of the second pole piece binder as the application
Case is and low in cost, which is because, it has good water-fast and ageing-resistant performance with respect to other binders, is conducive to mention
The cycle performance and cycle life of high battery.
The positive achievement that the present invention obtains are as follows:
1, collector increases the surface area of collector, with conductive priming coat after chemistry or electrochemical passivation processing
Caking property also greatly increases, to improve the cycle performance of battery；
2, carbon nanotube and graphene are introduced in conductive priming coat and active material layer, are formed by it with active material
Three-dimensional network conductive structure improve the absorbent of pole piece to increase the electric conductivity of active material, improve battery
Cycle performance；
3, inorganic ceramic layer is introduced on the surface of pole piece, because inorganic ceramic has the performances such as high temperature resistant, thermostabilization, and
Improve the security performance of battery；Simultaneously as inorganic, ceramic layer is easy to be infiltrated by electrolyte, electrochemistry plan is reduced, from
And improve the service life of battery；
4, it due to the synergistic effect between passivation collector, conductive coating, active material and ceramic spraying layer, protects
Battery has been demonstrate,proved in cyclic process, pole piece is not easily to fall off, meanwhile, the transmission rate of lithium ion in active material is improved, is reduced
The impedance of battery, improves the service life of battery.
In conclusion the application provides a kind of novel long-life energy storage lithium ion battery pole piece and lithium ion battery, lead to
It crosses and inorganic, ceramic layer is added in its electrode surface, reduce activation polarization, so that battery has good recycling
Performance and longer service life.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of pole piece of the present invention
Explanation is numbered in figure:
1- is passivated collector；2- conduction priming coat；3- active material layer；4- inorganic, ceramic layer.
Specific embodiment
It is right combined with specific embodiments below in order to make those skilled in the art more fully understand technical solution of the present invention
The present invention is described in further detail.
The research of lithium ion battery starts from the 1980s, Sony Corporation of Japan at the beginning of the nineties releases first generation lithium first
Ion battery, lithium ion battery start to realize commercialization.Since it is with excellent performance: such as energy density height, operating voltage
Height, small in size, light weight, environmental-friendly without memory effect, self discharge is small, have extended cycle life and have attracted much attention and
Favor.Over 30 years, lithium ion battery has been widely used for mobile phone, computer, on the portable electronics such as video camera.Currently
Carry out the commercialization research of hybrid vehicle.
In energy-storage system, battery be determine use cost an important factor for one of, this is because energy conversion system
General service life up to 10 years or more, and at present used in energy-storage battery charge and discharge cycles using after 500 times, performance
Original 95% or so is only kept, service life is only in 3-4.Therefore, battery is the critical component of whole system, is decide
Use cost and economic benefit.
The critical material of lithium ion battery includes positive electrode, negative electrode material, electrolyte, diaphragm and collector etc..Bonding
Auxiliary material of the agent as lithium ion battery, although in cell production process, binder be only used for electrode material mixing and
Coating stage is the indispensable component part of battery, there is very big influence to the performance of battery.
In view of this, the application provides a kind of novel long-life energy storage lithium ion battery pole piece and lithium ion battery, lead to
It crosses and inorganic, ceramic layer is added in its electrode surface, reduce activation polarization, so that battery has good recycling
Performance and longer service life.
In order to solve the above problem, the application proposes a kind of novel long-life energy storage lithium ion battery pole piece, including successively
The passivation collector of stacking, conductive priming coat, active material layer and inorganic, ceramic layer.Collector be in lithium ion battery can not or
One of scarce building block, it can not only carry active material, but also the electric current that electrode active material generates can be collected
And export, the internal resistance of lithium ion battery is advantageously reduced, the coulombic efficiency, cyclical stability and high rate performance of battery are improved.Its
In, passivation collector described herein includes the first passivation collector and the second passivation collector, wherein the first passivation afflux
Body is through chemistry or electrochemical passivation treated aluminium foil；Second passivation collector is that treated through chemistry or electrochemical passivation
Copper foil.Collector is by the purpose of chemistry or electrochemical treatments, increases the surface area of electrolytic copper foil and electrode aluminium foil, thus
The cementability for increasing itself and conductive priming coat improves the recycling performance of battery.
Wherein, the conductive priming coat includes binder 40-50%, graphene 25-40% and carbon nanotube 15-35%,
The active material layer includes binder 1-5%, active material 85-95%, graphene 1-5% and carbon nanotube 1-5%.Its
In, graphene is added in conductive priming coat and active material layer and the purpose of carbon nanotube is, the carbon of line style two-dimensional structure
The graphene of nanotube and face type two-dimensional structure realizes the combination in perfect line and face in the liquid phase, to realize good conduction
Network improves the chemical property of battery, meanwhile, it, can after carbon nanotube and graphene are effectively mixed with active material particle
Three-dimensional network conductive structure is formed with active material, the electric conductivity of active material is greatly improved, further improves work
Property substance gram specific capacity play, improve the absorbent of pole piece, improve the cycle performance of battery.Wherein, active material packet
Include the first active material and the second active material, wherein the first active material includes in LiFePO4, cobalt acid lithium or LiMn2O4
It is one or more；Second active material includes one of graphite, silicon-carbon cathode or lithium-barium oxide or a variety of.Wherein,
In first active material, LiFePO4 as the application preferred embodiment, which is because, compared with cobalt acid lithium and LiMn2O4,
LiFePO4 raw material source is more extensive, and price is more cheap and does not have the problem of any environmental pollution, theoretical specific capacity
For 170mAh/g, there is very high capacity, simultaneously because its lattice stability is good, lithium ion insertion abjection there will not be lattice
Too big influence has excellent cycle life and cycle performance, therefore, as the preferred embodiment of the application.Wherein, second
In active material, graphite as the application preferred embodiment, which is because, carbon material is by people to be studied and applied earliest
It is so far still that everybody pays close attention to and one of the emphasis of research in just coming for lithium ion battery commercialization, the crystallinity of graphite is high, and
With good layer structure, it is well suited for the insertion and abjection of lithium ion, compared with silicon-carbon cathode and lithium-barium oxide, electronics
Conductivity is higher, lithium ion diffusion coefficient is bigger, layer structure volume change before and after embedding lithium is smaller, embedding lithium capacity is higher, embedding
The more low advantage of lithium point, therefore, as the preferred embodiment of the application.
Wherein, the inorganic ceramic particle includes in silicon carbide, silicon nitride, diaspore, boron nitride or diboron trioxide
It is one or more.Wherein, diaspore is as the preferred embodiment of the application, which is because, other opposite inorganic ceramic particles, water
Aluminium stone has better conductivity of heat, when micro-short circuit local temperature, which occurs, for inside battery increases, can rapidly disperse heat, reduces
Thermal runaway odds.Wherein, the application also proposes that the partial size by inorganic ceramic particle is limited in 0.1 μm -5 μm of range
It is interior, which is because, the size of inorganic ceramic grain diameter largely determines the quality of its performance, partial size is more tiny and equal
It is even, be more conducive to the raising of material property, and when partial size is in 0.1 μm of micron order below, performance reaches unanimity substantially.
Wherein, the binder includes the first pole piece binder and the second pole piece binder, wherein the first pole piece binder
Including Kynoar, polyamidoimide, polyacrylonitrile-one of methyl methacrylate or sodium carboxymethylcellulose or
It is a variety of；The second pole piece binder includes butadiene-styrene rubber, xanthan gum, polyacrylic acid, propylene glycol methyl ether acetate or polyethylene
One of alcohol.Wherein, Kynoar as the application propose the first pole piece binder preferred embodiment, which is because,
Kynoar is apolar chain shape substance, and chemical property is stablized, is widely used in commercial Li-ion battery, bond effect
It is good, it is scattered, and in polymer, fluorine content reaches 593%, about 8 times high compared with other binders, thermoplastic Kynoar
With good chemical stability, temperature characterisitic, mechanical performance and processing performance, therefore, preferred polyvinylidene fluoride in this application
Alkene is as the first pole piece binder.Wherein, butadiene-styrene rubber proposes the preferred embodiment of the second pole piece binder as the application, former
Because being, other opposite binders have good water-fast and ageing-resistant performance, and low in cost, are conducive to improve battery
Cycle performance and cycle life.
The application proposes a kind of novel long-life energy storage lithium ion battery pole piece, including the passivation afflux stacked gradually
Body, conductive priming coat, active material layer and inorganic, ceramic layer, wherein the inorganic, ceramic layer includes binder 25-30% and nothing
Machine ceramic particle 70-75%.Wherein, the inorganic ceramic particle includes silicon carbide, silicon nitride, diaspore, boron nitride or three oxygen
Change one of two boron or a variety of, partial size is in the range of 0.1 μm -5 μm.Wherein, the passivation collector includes first blunt
Change collector and the second passivation collector, wherein the first passivation collector is through chemistry or electrochemical passivation treated aluminium foil；
Second passivation collector is through chemistry or electrochemical passivation treated copper foil；The conduction priming coat includes binder 40-
50%, graphene 25-40% and carbon nanotube 15-35%；The active material layer includes binder 1-5%, active material 85-
95%, graphene 1-5% and carbon nanotube 1-5%.
Wherein, the binder includes the first pole piece binder and the second pole piece binder, wherein the first pole piece binder
Including Kynoar, polyamidoimide, polyacrylonitrile-one of methyl methacrylate or sodium carboxymethylcellulose or
It is a variety of；The second pole piece binder includes butadiene-styrene rubber, xanthan gum, polyacrylic acid, propylene glycol methyl ether acetate or polyethylene
One of alcohol；Preferably, the first pole piece binder includes Kynoar, polyamidoimide or carboxymethyl cellulose
One of sodium is a variety of；The second pole piece binder includes one of butadiene-styrene rubber, xanthan gum or polyacrylic acid or more
Kind；Wherein, the active material includes the first active material and the second active material, wherein the first active material includes phosphoric acid
One of iron lithium, cobalt acid lithium or LiMn2O4 are a variety of；Second active material includes graphite, silicon-carbon cathode or the oxidation of lithium vanadium
One of object is a variety of.
A kind of novel long-life energy storage lithium ion battery, including the novel long-life energy storage lithium-ion electric of above-mentioned one kind
Pond pole piece.
Below in conjunction with the embodiment of the present invention, technical solution of the present invention is clearly and completely described, it is clear that
Described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the implementation in the present invention
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The scope of protection of the invention.
Embodiment 1
A kind of novel long-life energy storage lithium ion battery pole piece, including stack gradually passivation collector, conductive primary coat
Layer, active material layer and inorganic, ceramic layer, wherein the passivation collector includes the first passivation collector and the second passivation afflux
Body, wherein the first passivation collector is through chemical passivation treated aluminium foil, and the second passivation collector is to handle through chemical passivation
Copper foil afterwards；Wherein, the conductive priming coat includes binder 25%, graphene 40% and carbon nanotube 35%；Wherein, described
Active material layer includes binder 2%, active material 95%, graphene 2% and carbon nanotube 1%；Wherein, the inorganic ceramic
Layer includes binder 50% and inorganic ceramic particle 50%, and the inorganic ceramic particle is diaspore, and partial size is at 0.1 μm -1 μm
In the range of.
Wherein, the binder includes the first pole piece binder and the second pole piece binder, wherein the first pole piece binder
For Kynoar, the second pole piece binder is butadiene-styrene rubber；Wherein, the active material includes the first active material and second
Active material, the first active material are LiFePO4, and the second active material is graphite.
A kind of novel long-life energy storage lithium ion battery, including the novel long-life energy storage lithium ion battery of above-mentioned one kind
Pole piece.
Embodiment 2
A kind of novel long-life energy storage lithium ion battery pole piece, including stack gradually passivation collector, conductive primary coat
Layer, active material layer and inorganic, ceramic layer, wherein the passivation collector includes the first passivation collector and the second passivation afflux
Body, wherein the first passivation collector is through chemical passivation treated aluminium foil, and the second passivation collector is to handle through chemical passivation
Copper foil afterwards；Wherein, the conductive priming coat includes binder 50%, graphene 25% and carbon nanotube 25%；Wherein, described
Active material layer includes binder 5%, active material 87%, graphene 3% and carbon nanotube 5%；Wherein, the inorganic ceramic
Layer includes binder 30% and inorganic ceramic particle 70%, and the inorganic ceramic particle is diaspore, and partial size is at 2 μm -3 μm
In range.
Wherein, the binder includes the first pole piece binder and the second pole piece binder, wherein the first pole piece binder
For sodium carboxymethylcellulose, the second pole piece binder is polyacrylic acid；Wherein, the active material include the first active material and
Second active material, the first active material are cobalt acid lithium, and the second active material is lithium-barium oxide.
A kind of novel long-life energy storage lithium ion battery, including the novel long-life energy storage lithium ion battery of above-mentioned one kind
Pole piece.
Embodiment 3
A kind of novel long-life energy storage lithium ion battery pole piece, including stack gradually passivation collector, conductive primary coat
Layer, active material layer and inorganic, ceramic layer, wherein the passivation collector includes the first passivation collector and the second passivation afflux
Body, wherein the first passivation collector is through chemical passivation treated aluminium foil, and the second passivation collector is to handle through chemical passivation
Copper foil afterwards；Wherein, the conductive priming coat includes binder 40%, graphene 30% and carbon nanotube 30%；Wherein, described
Active material layer includes binder 1%, active material 94%, graphene 3% and carbon nanotube 2%；Wherein, the inorganic ceramic
Layer includes binder 25% and inorganic ceramic particle 75%, and the inorganic ceramic particle is diaspore, and partial size is at 4 μm -5 μm
In range.
Wherein, the binder includes the first pole piece binder and the second pole piece binder, wherein the first pole piece binder
For polyamidoimide, the second pole piece binder is xanthan gum；Wherein, the active material includes the first active material and second
Active material, the first active material are LiMn2O4, and the second active material is silicon-carbon cathode.
A kind of novel long-life energy storage lithium ion battery, including the novel long-life energy storage lithium ion battery of above-mentioned one kind
Pole piece.
Comparative example 1
A kind of conventional electrodes of lithium-ion batteries, including the collector, conductive priming coat and active material layer stacked gradually,
Wherein, the collector is aluminium foil；Wherein, the conductive priming coat includes binder 25%, graphene 40% and carbon nanotube
35%；Wherein, the active material layer includes active material 95%, binder 2%, graphene 2% and carbon nanotube 1%.Its
In, the binder includes the first pole piece binder and the second pole piece binder, wherein the first pole piece binder is polyvinylidene fluoride
Alkene, the second pole piece binder are butadiene-styrene rubber；Wherein, the active material includes the first active material and the second active material,
First active material is LiFePO4, and the second active material is graphite.
A kind of conventional lithium ion battery, including a kind of above-mentioned conventional electrodes of lithium-ion batteries.
By the battery in embodiment 1-3 and the battery in comparative example 1 under the conditions of charge and discharge blanking voltage is 2.5~3.8V
1C/1C charge-discharge performance is carried out, while both batteries are subjected to safety test, every kind of test 5 packet batteries of each survey, comparison
The test result of two kinds of batteries does not occur smoldering, catch fire to test and passing through until test terminates.
By contrast test as can be seen that using battery obtained by based lithium-ion battery positive plate of the invention cyclicity
It can be better than the prior art, and security performance makes battery have longer make better than the security performance of the battery of the same prior art
Use the service life.
The above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
Limitation of the invention, protection scope of the present invention should be defined by the scope defined by the claims..For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, several improvements and modifications can also be made, these change
It also should be regarded as protection scope of the present invention into retouching.
Claims (10)
1. a kind of novel long-life energy storage lithium ion battery pole piece, which is characterized in that including stack gradually passivation collector,
Conductive priming coat, active material layer and inorganic, ceramic layer, wherein the inorganic, ceramic layer includes binder 25-30% and inorganic
Ceramic particle 70-75%.
2. the novel long-life energy storage lithium ion battery pole piece of one kind described according to claim 1, which is characterized in that the nothing
Machine ceramic particle includes one of silicon carbide, silicon nitride, diaspore, boron nitride or diboron trioxide or a variety of.
3. a kind of novel long-life energy storage lithium ion battery pole piece according to claim 2, which is characterized in that described inorganic
Ceramic particle partial size is in the range of 0.1 μm -5 μm.
4. the novel long-life energy storage lithium ion battery pole piece of one kind described according to claim 1, which is characterized in that described blunt
Changing collector includes the first passivation collector and the second passivation collector, wherein the first passivation collector is through chemistry or electrification
Aluminium foil after learning Passivation Treatment；Second passivation collector is through chemistry or electrochemical passivation treated copper foil.
5. the novel long-life energy storage lithium ion battery pole piece of one kind described according to claim 1, which is characterized in that described to lead
Electric priming coat includes binder 40-50%, graphene 25-40% and carbon nanotube 15-35%.
6. the novel long-life energy storage lithium ion battery pole piece of one kind described according to claim 1, which is characterized in that the work
Property material layer includes binder 1-5%, active material 85-95%, graphene 1-5% and carbon nanotube 1-5%.
7. according to claim 1, the novel long-life energy storage lithium ion battery pole piece of 5 or 6 described one kind, which is characterized in that institute
State binder include the first pole piece binder and the second pole piece binder, wherein the first pole piece binder include Kynoar,
Polyamidoimide, polyacrylonitrile-one of methyl methacrylate or sodium carboxymethylcellulose or a variety of；Second pole
Piece binder includes one of butadiene-styrene rubber, xanthan gum, polyacrylic acid, propylene glycol methyl ether acetate or polyvinyl alcohol.
8. a kind of novel long-life energy storage lithium ion battery pole piece according to claim 7, which is characterized in that described first
Pole piece binder includes one of Kynoar, polyamidoimide or sodium carboxymethylcellulose or a variety of；Described second
Pole piece binder includes one of butadiene-styrene rubber, xanthan gum or polyacrylic acid or a variety of.
9. a kind of novel long-life energy storage lithium ion battery pole piece according to claim 6, which is characterized in that the activity
Substance includes the first active material and the second active material, wherein the first active material includes LiFePO4, cobalt acid lithium or mangaic acid
One of lithium is a variety of；Second active material includes one of graphite, silicon-carbon cathode or lithium-barium oxide or a variety of.
10. a kind of novel long-life energy storage lithium ion battery, which is characterized in that new including one kind described in claim 1-9
The long-life energy storage lithium ion battery pole piece of type.
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| CN113471404A (en) * | 2020-03-15 | 2021-10-01 | 深圳格林德能源集团有限公司 | Inorganic ceramic coating negative plate of lithium ion battery and manufacturing method thereof |
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