CN107492660A - Anode sizing agent, positive plate and lithium ion battery - Google Patents
Anode sizing agent, positive plate and lithium ion battery Download PDFInfo
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- CN107492660A CN107492660A CN201610414773.3A CN201610414773A CN107492660A CN 107492660 A CN107492660 A CN 107492660A CN 201610414773 A CN201610414773 A CN 201610414773A CN 107492660 A CN107492660 A CN 107492660A
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- sizing agent
- anode
- lithium ion
- ion battery
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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
- 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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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 provides a kind of anode sizing agent, positive plate and lithium ion battery.The anode sizing agent includes positive electrode active materials and solvent.The anode sizing agent also includes anode additive, and the anode additive includes the polyphenylene phosphonic acids diphenyl sulphone (DPS) ester shown in formula 1.In formula 1, n is 1~30.After the anode sizing agent of the present invention is applied in lithium ion battery, on the premise of the energy density of lithium ion battery is not influenceed, high-temperature storage performance, high temperature cyclic performance and the high rate performance of lithium ion battery can be greatly improved.
Description
Technical field
The present invention relates to field of lithium ion battery, more particularly to a kind of anode sizing agent, positive plate and lithium ion battery.
Background technology
As the application of the electronic products such as smart mobile phone, notebook computer and tablet personal computer is more and more extensive, lithium ion
Working power of the battery as electronic product, have the characteristics that energy density height, memory-less effect, operating voltage are high, just progressively
Substitute traditional Ni-Cd, MH-Ni battery.Expansion and power, the hair of energy storage device however as electronics market demand
Exhibition, requirement of the people to lithium ion battery improve constantly, and exploitation is with high-energy-density and the lithium ion for meeting fast charging and discharging
Battery turns into the task of top priority.
The method of the high rate performance of raising lithium ion battery has following several in the prior art.The first is to pass through optimization
Electrolyte forms, and improves the high rate performance and cycle performance of lithium ion battery.Second is the composition for changing positive electrode active materials,
For example, high rate performance is improved by using lithium iron phosphate/carbon composite cathode active material；By bulk phase-doped from TiN
LiFePO4Improve high rate performance；By improving high rate performance from lithium manganate anode active material.But this method is only applicable
In single positive electrode active materials.The third is the particle nanosizing for the both positive and negative polarity active material for making lithium ion battery.
Although above-mentioned several method improves the high rate performance of lithium ion battery to a certain extent, at the same time
Reduce the cyclical stability and high-temperature storage performance of lithium ion battery.
The content of the invention
In view of problem present in background technology, it is an object of the invention to provide a kind of anode sizing agent, positive plate and lithium
Ion battery, after the anode sizing agent is applied in lithium ion battery, in the premise for the energy density for not influenceing lithium ion battery
Under, high-temperature storage performance, high temperature cyclic performance and the high rate performance of lithium ion battery can be greatly improved.
In order to achieve the above object, in one aspect of the invention, the invention provides a kind of anode sizing agent, it includes positive pole
Active material and solvent.The anode sizing agent also includes anode additive, and the anode additive includes the polyphenyl shown in formula 1
Base phosphonic acids diphenyl sulphone (DPS) ester.In formula 1, n is 1~30.
In another aspect of this invention, the invention provides a kind of positive plate, it includes plus plate current-collecting body and positioned at just
Positive pole diaphragm on the collector of pole.The positive pole diaphragm includes positive electrode active materials.The positive pole diaphragm also includes：Positive pole adds
Agent, the anode additive include the polyphenylene phosphonic acids diphenyl sulphone (DPS) ester shown in formula 1.In formula 1, n is 1~30.
In still another aspect of the invention, the invention provides a kind of lithium ion battery, it is included according to the opposing party of the present invention
Positive plate described in face.
Relative to prior art, beneficial effects of the present invention are：
Include polyphenylene phosphonic acids diphenyl sulphone (DPS) ester in the anode sizing agent of the present invention, the anode sizing agent is applied in lithium-ion electric
Chi Zhong, on the premise of the energy density of lithium ion battery is not influenceed, the high temperature storage of lithium ion battery can be greatly improved
Energy, high temperature cyclic performance and high rate performance.
Anode sizing agent of the invention is easily prepared, reproducible, manufacturing cost is low, is advantageous to large-scale industrial production.
Embodiment
The following detailed description of anode sizing agent, positive plate and the lithium ion battery according to the present invention.
Illustrate anode sizing agent according to a first aspect of the present invention first.
Anode sizing agent according to a first aspect of the present invention includes positive electrode active materials and solvent.The anode sizing agent also wraps
Anode additive is included, the anode additive includes the polyphenylene phosphonic acids diphenyl sulphone (DPS) ester shown in formula 1.In formula 1, n is 1~30.
In anode sizing agent described according to a first aspect of the present invention, polyphenylene phosphonic acids diphenyl sulphone (DPS) ester in charging process,
Feng Zhi functional groups and phenyl functional group, which disconnect, to coat film forming in surface of positive electrode active material, improve the work of positive electrode active materials
Property site, while suppress the reaction of surface of positive electrode active material and electrolyte, so as to not influence lithium ion battery energy close
On the premise of degree, improve high-temperature storage performance, high temperature cyclic performance and the high rate performance of lithium ion battery.
In anode sizing agent described according to a first aspect of the present invention, it is preferable that n is 20~25.
In anode sizing agent described according to a first aspect of the present invention, the weight of the anode additive is lived for the positive pole
The 0.01%~5% of the weight of property material.When the content of anode additive is too low, to the performance improvement effect of lithium ion battery
Unobvious.When the too high levels of anode additive, because the anode additive does not have electric conductivity so as to trigger electrode to hinder
Anti- increase, the high temperature cyclic performance of lithium ion battery is caused to deteriorate.Preferably, the weight of the anode additive is the positive pole
The 0.05%~0.5% of the weight of active material.
In anode sizing agent described according to a first aspect of the present invention, the specific species of the positive electrode active materials is without spy
Other limitation, it can be selected according to the actual requirements.Specifically, the positive electrode active materials are selected from the transiting metal oxidation of lithium
Thing, the lithium for being coated with inorganic compound transition metal oxide in one or more.Wherein, in the transiting metal oxidation of lithium
The method of thing Surface coating inorganic compound is not particularly limited, and can be selected according to the actual requirements, as long as by selected by
The inorganic compound selected is coated on the surface of the transition metal oxide of lithium.
In anode sizing agent described according to a first aspect of the present invention, in the transition metal for the lithium for being coated with inorganic compound
In oxide, the weight of inorganic compound is the 0.005%~5% of the weight of the transition metal oxide of lithium.Preferably, it is inorganic
The weight of compound is the 0.05%~4% of the weight of the transition metal oxide of lithium.It is further preferred that inorganic compound
Weight is the 0.05%~3% of the weight of the transition metal oxide of lithium.It is further preferred that the weight of inorganic compound is
The 0.05%~2% of the weight of the transition metal oxide of lithium.
In anode sizing agent described according to a first aspect of the present invention, the transition metal oxide of the lithium is selected from
LiCoO2、LiMn2O4、LiMnO2、Li2MnO4、LiFePO4、LiMn1-xMxO2、Li1+aMn1-xM’xO2、LiCo1-xAxO2、LiMn2- yB’yO4、Li2Mn1-xO4、LiFe1-xCxPO4In one or more.Wherein, 0<a<0.2,0<x<1,0<y<2.
In anode sizing agent described according to a first aspect of the present invention, LiMn1-xMxO2、Li1+aMn1-xM’xO2For to LiMnO2
The dopant material obtained after being doped.Wherein, the element M of doping is not particularly limited, and can be carried out according to the actual requirements
Selection.Specifically, one or more of the M in Ni, Co, Al, Cr, Mg, Zr, Mo, V, Ti, B, F, Y.Preferably, M is selected from
One or more in Co, Al, Cr, Mg, Zr, Ti, Y.It is further preferred that the one kind of M in Al, Cr, Mg, Zr, Ti, Y
It is or several.It is further preferred that one or more of the M in Al, Cr, Mg, Ti, Y.The element M of doping ' it is not special
Limitation, can be selected according to the actual requirements.Specifically, M ' is selected from Ni, Co, Mn, Al, Cr, Mg, Zr, Mo, V, Ti, B, F, Y
In one or more.Preferably, one or more of the M ' in Co, Mn, Al, Cr, Mg, Zr, Ti, Y.Further preferably
Ground, one or more of the M ' in Mn, Al, Cr, Mg, Zr, Ti, Y.It is further preferred that M ' is selected from Al, Cr, Mg, Ti, Y
In one or more.
In anode sizing agent described according to a first aspect of the present invention, LiCo1-xAxO2For to LiCoO2After being doped
The dopant material arrived.Wherein, the elements A of doping is not particularly limited, and can be selected according to the actual requirements.Specifically, A
One or more in Ni, Al, Cr, Mg, Zr, Mo, V, Ti, B, F, Y.Preferably, A be selected from Co, Al, Cr, Mg, Zr, Ti,
One or more in Y.It is further preferred that one or more of the A in Al, Cr, Mg, Zr, Ti, Y.Still more preferably
Ground, one or more of the A in Al, Cr, Mg, Ti, Y.
In anode sizing agent described according to a first aspect of the present invention, LiMn2-yB’yO4For to LiMn2O4After being doped
Obtained dopant material.Wherein, the element B of doping ' it is not particularly limited, it can be selected according to the actual requirements.Specifically
Ground, one or more of the B ' in Ni, Co, Al, Cr, Mg, Zr, Mo, V, Ti, B, F, Y.Preferably, B ' be selected from Co, Al, Cr,
One or more in Mg, Zr, Ti, Y.It is further preferred that one or more of the B ' in Al, Cr, Mg, Zr, Ti, Y.More
It is further preferred that one or more of the B ' in Al, Cr, Mg, Ti, Y.
In anode sizing agent described according to a first aspect of the present invention, LiFe1-xCxPO4For to LiFePO4After being doped
Obtained dopant material.Wherein, the Elements C of doping is not particularly limited, and can be selected according to the actual requirements.Specifically
Ground, one or more of the C in Ni, Co, Mn, Al, Cr, Mg, Zr, Mo, V, Ti, B, F, Y.Preferably, C be selected from Co, Mn,
One or more in Al, Cr, Mg, Zr, Ti, Y.It is further preferred that the one kind of C in Mn, Al, Cr, Mg, Zr, Ti, Y
It is or several.It is further preferred that one or more of the C in Al, Cr, Mg, Ti, Y.
In anode sizing agent described according to a first aspect of the present invention, the method for doping is not particularly limited, can root
Selected according to actual demand, as long as by selected element doping into positive electrode active materials.Particularly, from body phase
Doping method adulterates selected element in positive electrode active materials.
In anode sizing agent described according to a first aspect of the present invention, it is preferable that the positive electrode active materials are selected from doping
Positive electrode active materials afterwards, i.e., selected from LiMn1-xMxO2、Li1+aMn1-xM’xO2、LiCo1-xAxO2、LiMn2-yB’yO4、Li2Mn1- xO4、LiFe1-xCxPO4In one or more.Positive electrode active materials after doping can further lift times of lithium ion battery
Rate performance, and the high-temperature storage performance and high temperature cyclic performance of lithium ion battery are not influenceed.It is further preferred that it is described just
Pole active material is selected from the positive electrode active materials obtained by the surface of positive electrode active material coated inorganic compound after doping, i.e.,
Selected from the LiMn for being respectively coated by inorganic compound1-xMxO2、Li1+aMn1-xM’xO2、LiCo1-xAxO2、LiMn2-yB’yO4、
Li2Mn1-xO4、LiFe1-xCxPO4In one or more.
In anode sizing agent described according to a first aspect of the present invention, the weight of doped chemical (M, M ', A, B ', C) is base
Material is (i.e. undoped with preceding positive electrode active materials LiCoO2、LiMn2O4、LiMnO2、Li2MnO4、LiFePO4) weight 0.01~
10%.Preferably, the weight of doped chemical is the 0.05~5% of the weight of base material.It is further preferred that the weight of doped chemical
For the 0.05~3% of the weight of base material.It is further preferred that the weight of doped chemical for base material weight 0.05~
1.5%.
In anode sizing agent described according to a first aspect of the present invention, the inorganic compound is selected from Al2O3、AlF3、
AlPO4、Li3PO4、Li4P2O7、ZrO2、MgO、TiO2、Y2O3、LiAlO2、LiNiPO4In one or more.Preferably, it is described
Inorganic compound is selected from Al2O3、AlPO4、Li3PO4、Li4P2O7、ZrO2、MgO、TiO2、Y2O3、LiNiPO4In one kind or several
Kind.It is further preferred that the inorganic compound is selected from Al2O3、ZrO2、MgO、TiO2、Y2O3In one or more.More enter one
Preferably, the inorganic compound is selected from Al to step2O3、MgO、TiO2In one or more.
In anode sizing agent described according to a first aspect of the present invention, the anode sizing agent also includes conductive agent.
In anode sizing agent described according to a first aspect of the present invention, the not special limit of species of the conductive agent
System, can be selected according to the actual requirements.Specifically, the conductive agent is selected from conductive black, superconduction carbon black, electrically conductive graphite, second
One or more in acetylene black, CNT.Preferably, the conductive agent is in conductive black, electrically conductive graphite, acetylene black
It is one or more of.It is further preferred that one or more of the conductive agent in conductive black, acetylene black.Further
Preferably, the conductive agent is selected from conductive black.The conductive black can be Super-P.
In anode sizing agent described according to a first aspect of the present invention, the weight of the conductive agent is the positive-active material
The 0.005~5% of the weight of material.Preferably, the weight of the conductive agent for the positive electrode active materials weight 0.05~
4%.It is further preferred that the weight of the conductive agent is the 0.05~3% of the weight of the positive electrode active materials.Further
Preferably, the weight of the conductive agent is the 0.05~2% of the weight of the positive electrode active materials.
In anode sizing agent described according to a first aspect of the present invention, the anode sizing agent also includes binding agent.
In anode sizing agent described according to a first aspect of the present invention, the specific species of the binding agent is not special
Limitation, as long as cohesive effect can be played.Specifically, the binding agent is selected from polyvinyl alcohol, polyurethane, polyacrylic acid
One or more in ester, Kynoar (PVDF), butyl rubber, epoxy resin, vinyl acetate resin, chlorinated rubber.It is excellent
Selection of land, one or more of the binding agent in polyurethane, epoxy resin, Kynoar, polyacrylate.
In anode sizing agent described according to a first aspect of the present invention, the weight of the binding agent is the positive-active material
The 0.005%~5% of the weight of material.Preferably, the weight of the binding agent is the weight of the positive electrode active materials
0.05%~4%.It is further preferred that the weight of the binding agent for the positive electrode active materials weight 0.05%~
3%.It is further preferred that the weight of the binding agent is the 0.05%~2% of the weight of the positive electrode active materials.
In anode sizing agent described according to a first aspect of the present invention, the not special limit of specific species of the solvent
System, can be selected according to the actual requirements.Preferably, the solvent is organic solvent.The organic solvent be selected from tetrahydrofuran,
One or more in pyridine, 1-METHYLPYRROLIDONE, pyrroles.Preferably, the organic solvent is selected from tetrahydrofuran, N- methyl
One or more in pyrrolidones.It is further preferred that the organic solvent is selected from 1-METHYLPYRROLIDONE.
In anode sizing agent described according to a first aspect of the present invention, the weight of the solvent is the positive electrode active materials
0.01 times~50 times of weight.Preferably, the weight of the solvent is 0.1 times~the 35 of the weight of the positive electrode active materials
Times.It is further preferred that the weight of the solvent is 1 times~10 times of the weight of the positive electrode active materials.It is further excellent
Selection of land, the weight of the solvent are 1.5 times~6 times of the weight of the positive electrode active materials.
In anode sizing agent described according to a first aspect of the present invention, the not special limit of preparation method of anode sizing agent
System, from conventional method.For example, positive electrode active materials, anode additive, conductive agent and binding agent are added in solvent
It is well mixed, obtain anode sizing agent.
Secondly the positive plate of explanation according to a second aspect of the present invention.
Positive plate according to a second aspect of the present invention includes plus plate current-collecting body and the cathode film on plus plate current-collecting body
Piece.The positive pole diaphragm includes described according to a first aspect of the present invention positive electrode active materials and anode additive.
In positive plate described according to a second aspect of the present invention, the positive pole diaphragm can be by according to a first aspect of the present invention
Described anode sizing agent is at least formed after drying.Wherein drying is for removing the solvent in anode sizing agent.As in positive pole
The amount of the solvent remained in the positive pole diaphragm formed after slurry drying, the requirement that can regard the specific condition of production determine." at least
Through drying " the step of referring to being formed the solvent removed in anode sizing agent of positive pole diaphragm, certainly according to practical condition also
There are other steps, such as cold pressing, cutting etc., be not limited according to this certainly.
In positive plate described according to a second aspect of the present invention, the positive pole diaphragm may also include according to the present invention first
Conductive agent described in aspect.
In positive plate described according to a second aspect of the present invention, the positive pole diaphragm may also include according to the present invention first
Binding agent described in aspect.
In positive plate described according to a second aspect of the present invention, the plus plate current-collecting body is aluminium foil.
In positive plate described according to a second aspect of the present invention, the thickness of institute's plus plate current-collecting body is 5 microns~30 microns.
Preferably, the thickness of institute's plus plate current-collecting body is 12 microns.
Illustrate lithium ion battery according to a third aspect of the present invention again.
Positive plate described according to a second aspect of the present invention is included according to the lithium ion battery of the 3rd invention of the invention.
Negative plate, electrolyte and barrier film are also included according to the lithium ion battery of the 3rd invention of the invention.
In lithium ion battery described according to a third aspect of the present invention, the specific kind of negative plate, electrolyte and barrier film
Class is not particularly limited, and can be selected according to the actual requirements.
With reference to embodiment, the application is expanded on further.It should be understood that these embodiments be merely to illustrate the application without
For limiting scope of the present application.
In the examples below, used material, reagent and instrument be not as having specified otherwise, commercially
Purchase obtains.
For convenience of description, the positive electrode active materials and anode additive used in the following embodiments are write a Chinese character in simplified form as follows：
Positive electrode active materials 1：In LiCoO2Middle doping accounts for LiCoO2Weight be 0.1% Al and account for LiCoO2Weight
The dopant material formed by 0.1% Mg, the dopant material weight then is accounted for as 0.1% in the Surface coating of the dopant material
Al2O3With account for the dopant material weight be 0.1% TiO2。
Positive electrode active materials 2：LiFePO4。
Positive electrode active materials 3：LiCo0.8Ni0.2O2。
Anode additive 1：Polymerization degree n=10.
Anode additive 2：Polymerization degree n=15.
Anode additive 3：Polymerization degree n=20.
Anode additive 4：Polymerization degree n=25.
(1) prepared by positive plate
Positive electrode active materials, anode additive, binding agent, conductive agent are mixed, add solvent N-methyl pyrilidone
(NMP), stirred under de-airing mixer effect and obtain anode sizing agent；It is 12 μm that anode sizing agent is evenly applied into thickness
On aluminium foil；Aluminium foil is transferred to 90 DEG C of oven drying 1h after room temperature is dried, then obtains positive plate by cold pressing, cutting, its
Middle anode sizing agent ultimately forms positive pole diaphragm.Positive electrode active materials, anode additive, binding agent, conductive agent species and contain
Amount is shown in table 1.The content is the gross weight that each material accounts for positive electrode active materials, anode additive, binding agent, conductive agent
Weight percentage.
(2) prepared by negative plate
By negative active core-shell material graphite, thickener sodium carboxymethylcellulose (CMC), binding agent butadiene-styrene rubber according to weight ratio
98:1:1 is mixed, and adds solvent deionized water, is stirred under de-airing mixer effect and is obtained cathode size；By negative pole
Slurry is coated uniformly on the copper foil that thickness is 8 μm；Copper foil is transferred to 120 DEG C of oven drying 1h after room temperature is dried, then
Negative plate is obtained by being cold-pressed, cutting, wherein cathode size ultimately forms cathode membrane.
(3) prepared by electrolyte
In water content<In 10ppm argon gas atmosphere glove box, by fully dry lithium salts LiPF6It is dissolved in organic solvent
In, it is well mixed, obtains electrolyte.Wherein, LiPF6Concentration be 1M.Wherein organic solvent is ethylene carbonate:Propylene carbonate
Ester:Propyl propionate=1:1:The mixed solvent of 1 (volume ratio).
(4) preparation of barrier film
(provided from 14 microns thick of polypropylene barrier films by Celgard companies).
(5) preparation of lithium ion battery
Positive plate, barrier film, negative plate are folded in order, barrier film is played isolation between being in positive and negative plate
Effect, then wind and obtain battery core；Battery core is placed in aluminum plastic film and toasted, the above-mentioned electrolyte prepared is injected into dry
Seal and stand in battery core after dry, then battery core is melted into and the process such as aging, obtain lithium ion battery.
Next the performance test of explanation lithium ion battery.Wherein, 15 lithium ion batteries of every group of test, take it average
Value.
(1) the high rate performance test of lithium ion battery
At 25 DEG C, by lithium ion battery with 1C (nominal capacity) constant-current charge to 4.35V, then with constant pressure 4.35V chargings
To electric current≤0.05C, after shelving 5min, with 0.2C constant-current discharges to by voltage 3V, actual discharge capacity is now designated as D0.
Then with 1C constant-current charges to 4.35V, then electric current≤0.05C charged to constant pressure 4.35V, is finally discharged to 2C by voltage
3V, the actual discharge capacity recorded now are D1.The high rate performance of lithium ion battery=[(D1-D0)/D0] × 100%.
(2) the high-temperature storage performance test of lithium ion battery
At 60 DEG C, by lithium ion battery with 0.5C constant-current charges to 4.35V, then constant-voltage charge to electric current is 0.05C, this
When test lithium ion battery thickness and be designated as h0；Lithium ion battery is put into 60 DEG C of insulating box afterwards, stores 30 days, the 30th
It takes out, and tests the now thickness of lithium ion battery and is designated as h1.Thickness swelling after the storage 30 days of 60 DEG C of lithium ion battery
=[(h1-h0)/h0] × 100%.
(3) the high temperature cyclic performance test of lithium ion battery
At 45 DEG C, by lithium ion battery with 1C constant-current charges to 4.35V, then constant-voltage charge to electric current is 0.05C, then
With 1C constant-current discharges to 3.0V, now to circulate first, 300 cycle charging/electric discharges are carried out according to above-mentioned condition.Lithium-ion electric
Capability retention after the circulation 300 times of 45 DEG C of pond=(discharge capacities that circulation is 300 times/discharge capacity circulated first) ×
100%.
The performance test results of the embodiment 1-9 of table 2 and comparative example 1-3 lithium ion battery
It is can be seen that from the test result of table 2 compared with comparative example 1-3, of the invention with the addition of anode additive polyphenyl
High rate performance, high temperature cyclic performance and the high-temperature storage performance of the lithium ion battery of base phosphonic acids diphenyl sulphone (DPS) ester are significantly changed
It is kind.
Claims (9)
1. a kind of anode sizing agent, including：
Positive electrode active materials；And
Solvent；
Characterized in that,
The anode sizing agent also includes：Anode additive, the anode additive include the polyphenylene phosphonic acids diphenyl sulphone (DPS) shown in formula 1
Ester；
In formula 1, n is 1~30.
2. anode sizing agent according to claim 1, it is characterised in that n is 20~25.
3. anode sizing agent according to claim 1, it is characterised in that the weight of the anode additive is lived for the positive pole
The 0.01%~5% of the weight of property material, preferably 0.05%~0.5%.
4. anode sizing agent according to claim 1, it is characterised in that the anode sizing agent also includes conductive agent and/or glued
Tie agent.
5. a kind of positive plate, including plus plate current-collecting body and the positive pole diaphragm on plus plate current-collecting body, the positive pole diaphragm bag
Include positive electrode active materials；
Characterized in that,
The positive pole diaphragm also includes：Anode additive, the anode additive include the polyphenylene phosphonic acids diphenyl sulphone (DPS) shown in formula 1
Ester；
In formula 1, n is 1~30.
6. positive plate according to claim 5, it is characterised in that n is 20~25.
7. positive plate according to claim 5, it is characterised in that the weight of the anode additive is the positive-active
The 0.01%~5% of the weight of material, preferably 0.05%~0.5%.
8. positive plate according to claim 5, it is characterised in that the positive pole diaphragm also includes conductive agent and/or bonding
Agent.
9. a kind of lithium ion battery, it is characterised in that including the positive plate according to any one of claim 5-8.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112952100A (en) * | 2021-05-13 | 2021-06-11 | 蜂巢能源科技有限公司 | Cobalt-free anode material slurry and preparation method and application thereof |
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