CN110534818A - Suspending agent for lithium ion battery cathode, lithium ion battery cathode and lithium ion battery - Google Patents
Suspending agent for lithium ion battery cathode, lithium ion battery cathode and lithium ion battery Download PDFInfo
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- CN110534818A CN110534818A CN201810514684.5A CN201810514684A CN110534818A CN 110534818 A CN110534818 A CN 110534818A CN 201810514684 A CN201810514684 A CN 201810514684A CN 110534818 A CN110534818 A CN 110534818A
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
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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
- 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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- 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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- Chemical Kinetics & Catalysis (AREA)
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- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a suspending agent for a lithium ion battery cathode, which comprises a compound shown in a general formula (I):wherein R is1is-CH2‑，R2Is selected from-CH2CN、‑CH2CH2CN、‑OCN、‑CH2NH2、‑OH、‑CH2OH、‑C(CH3)2OH、‑SO3H、‑CH2SO3H; or R1Is alkyl with 2-5 carbon atoms or alkenyl with 2-5 carbon atoms, R2Is a compound containing-CN, -COOH, -NH2、‑OCN、‑OH、‑CONHCH3、‑CON(CH3)2、‑SO3A group of H; x is Li+、Na+、K+、NH4+One of (1), m>0，n>0, and m + n equals 100%. Compared with the prior art, the suspending agent provided by the invention has the advantages that the multi-membered ring alpha-cellulose is copolymerized with polar monomers such as acrylonitrile/propionate/methyl propionate/butyrate/vinyl acetate/allyl acetate/propanesulfonic acid and the like, and the molecular chain contains a large amount of polar groups, so that more Li is easily accumulated on the surface of the active material+Is advantageous to Li+The lithium ion battery can be conducted in the suspending agent rapidly, and the rate capability of the finally obtained lithium ion battery is good.
Description
Technical field
The invention belongs to field of lithium ion battery, hang it is more particularly related to which a kind of negative electrode of lithium ion battery is used
Floating agent, negative electrode of lithium ion battery and lithium ion battery.
Background technique
Lithium ion battery because its have many advantages, such as energy density height, good cycle, self-discharge rate it is low, it is environment friendly and pollution-free at
One of applied for the world today and study widest secondary cell.Currently, lithium ion battery has been successfully applied to mobile phone, pen
Remember this grade portable electronic device, and gradually develops to numerous areas such as aerospace, electric car, energy-storage systems.New answers
With performances such as specific capacity, multiplying power property, cycle lives to lithium ion battery, more stringent requirements are proposed.The property of lithium ion battery
The positive and negative pole material of composition battery can be depended greatly on.
When preparing battery cathode with traditional cellulosic suspending agent, since it does not have lithium ion transport ability, lead to electricity
The high rate performance in pond is low, cycle life is short, DCR value is high, is unable to meet demand.
In view of this, outstanding it is necessory to provide a kind of negative electrode of lithium ion battery use for helping to improve lithium ion transport rate
Floating agent and negative electrode of lithium ion battery and lithium ion battery with suspending agent.
Summary of the invention
Goal of the invention of the invention is: overcoming the deficiencies of the prior art and provide one kind and helps to improve lithium ion transport
The negative electrode of lithium ion battery suspending agent of rate and negative electrode of lithium ion battery and lithium ion battery with suspending agent.
In order to achieve the above-mentioned object of the invention, the present invention provides a kind of negative electrode of lithium ion battery suspending agents, and it includes logical
Formula (I) compound represented:
Wherein, R1For-CH2, R2Selected from-CH2CN、-CH2CH2CN、-OCN、-CH2NH2、-OH、-CH2OH、-C(CH3)2OH、-SO3H、-CH2SO3One of H；Or
R1For carbon atom number be 2~5 alkyl or carbon atom number be 2~5 alkenyl, R2For containing-CN ,-COOH ,-
NH2、-OCN、-OH、-CONHCH3、-CON(CH3)2、-SO3The group of H；
X is Li+、Na+、K+、NH4+One of；
M > 0, n > 0, and m+n=100%.
As a kind of improvement of negative electrode of lithium ion battery suspending agent of the present invention, work as R1The alkyl for being 2~5 for carbon atom number
When, R1Selected from-(CH2)2-、-(CH2)3-、-(CH2)4-、-(CH2)5-、-CH(CH3)-、-C(CH3)2-、-C(CH3)2CH2-、-C
(CH3)2CH2CH2-、-CH(CH3)CH2-、-C(CH2CH3)CH2-、-C(CH2CH2CH3)CH2-、-CH(CH3)CH2CH2-、-CH
(CH3)CH2CH2CH2One of；
Work as R1When the alkenyl for being 2~5 for carbon atom number, R1Selected from-CH=CH- ,-CH2- CH=CH- ,-CH2-CH2- CH=
CH-、-CH2- CH=CH-CH2-CH2-、-CH2-CH2-CH2One of-CH=CH-；
R2Selected from-CN ,-CH2CN、-CH2CH2CN、-OCN、-CH2NH2、-CONHCH3、-CON(CH3)2、-OH、-CH2OH、-
C(CH3)2OH、-COOH、-C6H5COOH、-SO3H、-CH2SO3H、-C6H5SO3H、-C6H5CH2SO3One of H.
As a kind of improvement of negative electrode of lithium ion battery suspending agent of the present invention, the negative electrode of lithium ion battery suspending agent
Selected from one or more of general formula Ia~Ir:
As a kind of improvement of negative electrode of lithium ion battery suspending agent of the present invention, the ratio of m:n is in the logical formula (I)
(50%~80%): (20%~50%).When ratio is too small, slurry difficulties in dispersion, stability is poor, when ratio is excessive, Li+
Transmission is difficult, is unfavorable for dynamics promotion；Pole piece flexibility improves unobvious simultaneously, and coating is easy to happen season cracking.
As a kind of improvement of negative electrode of lithium ion battery suspending agent of the present invention, the ratio of m:n is in the logical formula (I)
(60%~70%): (30%~40%).
As a kind of improvement of negative electrode of lithium ion battery suspending agent of the present invention, the ratio of m:n is in the logical formula (I)
65%:35%.
As a kind of improvement of negative electrode of lithium ion battery suspending agent of the present invention, the negative electrode of lithium ion battery suspending agent
Number-average molecular weight be 300000~400000.
To achieve the goals above, the present invention provides a kind of negative electrode of lithium ion battery, including negative current collector and coating
Negative electrode active material layer on negative current collector, the negative electrode active material layer include negative electrode active material and suspending agent, institute
Stating suspending agent is negative electrode of lithium ion battery suspending agent described above.
As a kind of improvement of negative electrode of lithium ion battery of the present invention, the suspending agent accounts for the negative electrode active material layer gross weight
The weight percent of amount is 2%~5%.When content is too small, slurry difficulties in dispersion, stability is poor, when content is excessive, influences
The dosage of active material reduces the energy force density of battery.
As a kind of improvement of negative electrode of lithium ion battery of the present invention, the negative electrode active material is selected from soft carbon, hard carbon, artificial
Graphite, natural graphite, silicon, silicon oxide compound, silicon-carbon compound, lithium titanate, one of metal that alloy can be formed with lithium or
It is several.
To achieve the goals above, the present invention provides a kind of lithium ion battery, including anode, cathode, it is interval in anode
Isolation film and electrolyte between cathode, the cathode are negative electrode of lithium ion battery described above.
As a kind of improvement of lithium ion battery of the present invention, the anode includes positive electrode active materials, the positive-active
Material is selected from lithium and cobalt oxides, lithium nickel oxide, lithium manganese oxide, Li, Ni, Mn oxide, lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminium
Oxide and these oxides add one or more of the compound that other transition metal or nontransition metal obtain.
Compared with the existing technology, negative electrode of lithium ion battery suspending agent of the present invention is by by polynary ring alpha-cellulose and propylene
The poles such as nitrile/propionic acid ester/methylpropanoic acid esters/butyric acid ester/vinyl acetate esters/propylene acetate/acrylic acid/propane sulfonic acid class
Property monomer copolymerization, due on its strand contain a large amount of polar group, such as-CN ,-OCN ,-COOH ,-SO3H etc., and due to it
Biggish electronegativity, so that surface of active material easily assembles more Li+, be conducive to Li+Quick conduction in suspending agent, makes
There is good dynamic performance with the lithium ion battery of such suspending agent.Simultaneously by copolymer molecule chain-COOH ,-
SO3The groups such as H continue ionization processing, are conducive to deviate from and be embedded in lithium ion, reduce internal resistance, improve lithium ion transport effect
Rate, final gained lithium ion battery good rate capability, analysis lithium performance are strong, and DCR value is low.
Specific embodiment
In order to be more clear goal of the invention of the invention, technical solution and its technical effect, below in conjunction with specific implementation
Mode, the present invention will be described in further detail.It should be understood that specific embodiment described in this specification is only
It is to be not intended to limit the present invention to explain the present invention.
Embodiment 1
1) synthesis of suspending agent is synthesized using following reaction condition and step:
Wherein, R1For-CH2CH2, R2For-COOH, X Na+,
Structural formula isNumber-average molecular weight is 300000~400000.
The preparation of battery
1) preparation of positive plate
By positive electrode active materials LiNiCoMnO2, binder PVDF, conductive agent SP, solvent N-methyl pyrilidone (NMP)
Through high-speed stirred 3h, finely dispersed slurry is obtained.In the slurry, solid content 60wt% includes in solid component
Nickle cobalt lithium manganate (the LiNiCoMnO of 90wt%2), the conductive black of the Kynoar of 5.0wt% and 5wt%.It then will slurry
Material is equably coated in aluminium foil two sides, is compacted by drying, roll squeezer, obtains positive plate.
2) preparation of negative electrode tab
Negative electrode active material artificial graphite, binder SBR emulsion, negative electrode of lithium ion battery are led with suspending agent and conductive agent
Electric carbon black mixing, solvent deionized water is added later, obtains finely dispersed slurry through high-speed stirred.In the slurry, solid contains
Amount is 40wt%, the negative electrode of lithium ion battery suspending agent (general formula of the artificial graphite comprising 90wt%, 2wt% in solid component
Ia), the SBR of the conductive black of 3wt%, 5wt%.Then slurry is equably coated in copper foil two sides, by drying, roll squeezer pressure
It is real, obtain negative electrode tab.
3) preparation of electrolyte
It is the lithium hexafluoro phosphate of 1M as lithium salts that electrolyte, which uses concentration, and solvent is ethylene carbonate, dimethyl carbonate, 1,
1:1:1 is mixed to get 2- propylene carbonate by volume.
4) preparation of lithium ion battery
Conductive tab is welded on positive plate and negative electrode tab, it will using the polypropylene, polyethylene composite isolated film of 12 μ m-thicks
Positive plate and negative electrode tab are spaced apart, and winding forms naked battery core later, then is encapsulated with aluminum plastic film.Electrolyte is injected after encapsulation, to electricity
Core carries out chemical conversion and aging, obtains growing generous for 130mm × 60mm × 4mm square flexible package lithium ion.
Embodiment 2~21 is substantially the same manner as Example 1, the difference is that, negative electrode of lithium ion battery suspending agent structure
Substituent group in formula is different, and each embodiment relevant parameter is as shown in table 1.
Comparative example 1
Comparative example 1 is substantially the same manner as Example 1, the difference is that suspending agent used in cathode is conventional suspension agent
CMC (sodium carboxymethylcellulose), relevant parameter is as shown in table 1.
Performance of lithium ion battery test
The DCR of lithium ion battery is tested
The resulting lithium ion battery of Examples 1 to 21 and the resulting lithium ion battery of comparative example 1 are pressed into following process respectively
DCR is tested respectively.
The corresponding internal resistance of cell test of 25 DEG C of 50% capacity:
1) 25 DEG C by battery standing 5min；
2) 1C constant current charging charges to electric current 0.05C to voltage 4.3V, constant voltage 4.3V；
3) it is then allowed to stand 10min；
4) 1C0 discharges 30min (C0 of extraction is adjusted to 50% capacity)；
5) 60min is stood；
6) 4C discharges 30s (sampling site interval 0.1s)；
7) 10min is stood.
The corresponding internal resistance of cell test of -25 DEG C of 50% capacity:
1) 25 DEG C of standing 5min；
2) 1C constant current charging charges to electric current 0.05C to 4.3V, constant voltage 4.3V；
3) it is then allowed to stand 10min；
4) 1C0 discharges 30min (C0 of extraction is adjusted to 50% capacity)；
5) temperature regulating is to -25 DEG C；
6) 2h is stood；
7) 0.36C discharges 10s (sampling site interval 0.1s)；
8) 10min is stood.
Examples 1 to 21 and the test result of comparative example 1 are as shown in Table 1 and Table 2.
1 Examples 1 to 21 of table and comparative example 1 at 25 DEG C in 4C/30s 50% capacity internal resistance and at -25 DEG C
The internal resistance of 50% capacity in 0.36C/10s
As known from Table 1, compared to comparative example 1, the DCR of the lithium ion battery of Examples 1 to 21 is substantially reduced.Because implementing
Have in suspending agent strand used in example 1~21 and utilizes Li+Functional groups-the COOH ,-SO of conduction3H、-CN、-OH
Deng the elecrtonegativity of these functional groups is stronger, for positively charged Li+With biggish sucking action, in the drive of electric field
Under dynamic, strand has actually become Li+The advantageous channel of transmission, Li+Transport resistance reduces；Li can be reduced simultaneously+Positive and negative
Desolvation energy barrier during the deintercalation of pole, Li+Deintercalation resistance reduce, be conducive to improve battery dynamic performance.It needs
Illustrate, regardless of example structure leads to R in formula (I)1For-CH2, carbon atom number be 2~5 alkyl or carbon atom number be 2
~5 alkenyl, R2To contain-CN ,-COOH ,-NH2、-OCN、-OH、-CONHCH3、-CON(CH3)2、-SO3The group of H；X is Li+、Na+、K+、NH4+, the DCR of obtained lithium ion battery is substantially reduced, and dynamic performance is all significantly increased.
The high rate performance of lithium ion battery is tested
By the resulting lithium ion battery of Examples 1 to 21 and the resulting lithium ion battery of comparative example 1 respectively at normal temperature with
For 0.5C constant-current charge to 4.3V, constant-voltage charge to blanking voltage is 0.05C, later respectively by different discharge-rate (0.5C,
1.0C, 2.0C, 3.0C) it discharges, test result is as shown in table 2.It is worth on the basis of the resulting capacity of 0.5C electric discharge
(100%).
The high rate performance test result of table 2 Examples 1 to 21 and comparative example 1
As known from Table 2, compared to comparative example 1, the high rate performance of the lithium ion battery of Examples 1 to 21 (1.0C,
2.0C, 3.0C) under significantly improve utilize Li because having in suspending agent strand used in Examples 1 to 21+Conduction
Functional groups-COOH ,-SO3H, the elecrtonegativity of-CN ,-OH etc., these functional groups are stronger, for positively charged Li+Tool
There is biggish sucking action, under the driving of electric field, strand has actually become Li+The advantageous channel of transmission, Li+Transmission resistance
Power reduces；Li can be reduced simultaneously+Desolvation energy barrier during positive and negative anodes deintercalation, Li+Deintercalation resistance reduce, favorably
In the high rate performance for improving battery.It should be noted that regardless of example structure leads to R in formula (I)1For-CH2, carbon atom number 2
The alkenyl that~5 alkyl or carbon atom number is 2~5, R2To contain-CN ,-COOH ,-NH2、-OCN、-OH、-CONHCH3、-
CON(CH3)2、-SO3The group of H；X is Li+、Na+、K+、NH4+, obtained lithium ion battery high rate performance, which has, significantly to be mentioned
It is high.
The cathode of lithium ion battery analyses lithium performance test
By the resulting lithium ion battery of Examples 1 to 21 and the resulting lithium ion battery of comparative example 1 respectively at 25 DEG C with
For 3C constant-current charge to 4.3V, constant-voltage charge to blanking voltage is 0.05C, and 1C is discharged to 2.8V, completely fills end after 10 circle of circulation
Testing process；With 0.1C constant-current charge to 4.3V at -20 DEG C, constant-voltage charge to blanking voltage is 0.05C, and 0.33C is discharged to
2.8V, 10 circle of circulation completely fill end testing process later.It is as shown in table 3 that cathode analyses lithium situation.
The cathode of 3 Examples 1 to 21 of table and comparative example 1 analyses lithium test result
0 indicates not analyse lithium, and 1 indicates slight analysis lithium, and 4 indicate that analysis lithium is more serious, and 5 indicate serious analysis lithium, data table from 0 to 5
Show that analysis lithium is increasingly severe.
From table 3 it can be seen that the cathode analysis lithium of the lithium ion battery of Examples 1 to 21 obtains obviously compared to comparative example 1
Improve, does not occur substantially to analyse lithium, it is very serious that comparative example 1 analyses lithium situation.This is because suspending agent used in Examples 1 to 21 point
Have in subchain and utilizes Li+Functional form group-the CN ,-OCN ,-COOH ,-SO of conduction3H etc., the negative electricity of these functional groups
Property is stronger, for positively charged Li+With biggish sucking action, on the one hand under the driving of electric field, strand is actually
Become Li+The advantageous channel of transmission, Li+Transport resistance reduces；On the other hand Li can be reduced+During positive and negative anodes deintercalation
Desolvation energy, Li+Deintercalation resistance reduce, be conducive to deviate from and be embedded in lithium ion, reduce internal resistance, improve lithium ion transport
Efficiency is conducive to the dynamic performance for promoting battery.It should be noted that regardless of example structure leads to R in formula (I)1For-CH2-、
The alkenyl that the alkyl or carbon atom number that carbon atom number is 2~5 are 2~5, R2To contain-CN ,-COOH ,-NH2、-OCN、-OH、-
CONHCH3、-CON(CH3)2、-SO3The group of H；X is Li+、Na+、K+、NH4+, the cathode analysis lithium feelings of obtained lithium ion battery
Condition all be improved significantly, dynamic performance is all significantly improved.
Compared with the existing technology, negative electrode of lithium ion battery suspending agent of the present invention is by by polynary ring alpha-cellulose and propylene
The poles such as nitrile/propionic acid ester/methylpropanoic acid esters/butyric acid ester/vinyl acetate esters/propylene acetate/acrylic acid/propane sulfonic acid class
Property monomer copolymerization, due on its strand contain a large amount of polar group, such as-CN ,-OCN ,-COOH ,-SO3H etc., and due to it
Biggish electronegativity, so that surface of active material easily assembles more Li+, be conducive to Li+Quick conduction in suspending agent, makes
There is good dynamic performance with the lithium ion battery of such suspending agent.Simultaneously by copolymer molecule chain-COOH ,-
SO3The groups such as H continue ionization processing, are conducive to deviate from and be embedded in lithium ion, reduce internal resistance, improve lithium ion transport effect
Rate, final gained lithium ion battery good rate capability, analysis lithium performance are strong, and DCR value is low.
According to above-mentioned principle, the present invention can also be made appropriate changes and modifications to the above embodiments.Therefore, this hair
It is bright to be not limited to specific embodiment disclosed and described above, some modifications and changes of the invention should also be as to fall into this
In the scope of protection of the claims of invention.In addition, although being used some specific terms in this specification, these terms
Merely for convenience of description, it does not limit the present invention in any way.
Claims (10)
1. a kind of negative electrode of lithium ion battery suspending agent, which is characterized in that include logical formula (I) compound represented:
Wherein, R1For-CH2, R2Selected from-CH2CN、-CH2CH2CN、-OCN、-CH2NH2、-OH、-CH2OH、-C(CH3)2OH、-
SO3H、-CH2SO3One of H；Or
R1For carbon atom number be 2~5 alkyl or carbon atom number be 2~5 alkenyl, R2To contain-CN ,-COOH ,-NH2、-
OCN、-OH、-CONHCH3、-CON(CH3)2、-SO3The group of H；
X is Li+、Na+、K+、NH4+One of；
M > 0, n > 0, and m+n=100%.
2. negative electrode of lithium ion battery suspending agent according to claim 1, which is characterized in that work as R1For carbon atom number be 2~
When 5 alkyl, R1Selected from-(CH2)2-、-(CH2)3-、-(CH2)4-、-(CH2)5-、-CH(CH3)-、-C(CH3)2-、-C(CH3)2CH2-、-C(CH3)2CH2CH2-、-CH(CH3)CH2-、-C(CH2CH3)CH2-、-C(CH2CH2CH3)CH2-、-CH(CH3)
CH2CH2-、-CH(CH3)CH2CH2CH2One of；
Work as R1When the alkenyl for being 2~5 for carbon atom number, R1Selected from-CH=CH- ,-CH2- CH=CH- ,-CH2-CH2- CH=CH- ,-
CH2- CH=CH-CH2-CH2-、-CH2-CH2-CH2One of-CH=CH-；
R2Selected from-CN ,-CH2CN、-CH2CH2CN、-OCN、-CH2NH2、-CONHCH3、-CON(CH3)2、-OH、-CH2OH、-C
(CH3)2OH、-COOH、-C6H5COOH、-SO3H、-CH2SO3H、-C6H5SO3H、-C6H5CH2SO3One of H.
3. negative electrode of lithium ion battery suspending agent according to claim 1, which is characterized in that the negative electrode of lithium ion battery
One or more of general formula Ia~Ir is selected from suspending agent:
4. negative electrode of lithium ion battery suspending agent according to claim 1, which is characterized in that m:n in the logical formula (I)
Ratio is (50%~80%): (20%~50%).
5. negative electrode of lithium ion battery suspending agent according to claim 1, which is characterized in that m:n in the logical formula (I)
Ratio is (60%~70%): (30%~40%).
6. negative electrode of lithium ion battery suspending agent according to claim 1, which is characterized in that the negative electrode of lithium ion battery
It is 300000~400000 with the number-average molecular weight of suspending agent.
7. a kind of negative electrode of lithium ion battery, including negative current collector and the negative electrode active material layer being coated on negative current collector,
The negative electrode active material layer includes negative electrode active material and suspending agent, and the suspending agent is described in any one of claim 1 to 6
Negative electrode of lithium ion battery suspending agent.
8. negative electrode of lithium ion battery according to claim 7, which is characterized in that the suspending agent accounts for the negative electrode active material
The weight percent of matter layer total weight is 2%~5%.
9. negative electrode of lithium ion battery according to claim 7, which is characterized in that the negative electrode active material be selected from soft carbon,
Hard carbon, natural graphite, silicon, silicon oxide compound, silicon-carbon compound, lithium titanate, can be formed in the metal of alloy artificial graphite with lithium
One or more.
10. a kind of lithium ion battery, including anode, cathode, the isolation film and electrolyte being interval between anode and cathode,
It is characterized in that, the cathode is negative electrode of lithium ion battery as claimed in claim 7.
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| CN201810514684.5A CN110534818B (en) | 2018-05-25 | 2018-05-25 | Suspending agent for lithium ion battery cathode, lithium ion battery cathode and lithium ion battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113571673A (en) * | 2021-07-30 | 2021-10-29 | 江西安驰新能源科技有限公司 | Thick negative electrode plate, preparation method thereof and lithium ion battery |
| RU2798050C1 (en) * | 2022-10-17 | 2023-06-14 | Акционерное общество "Энергия" (АО "Энергия") | Method for preparing active mass of negative electrode of lithium-ion battery |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1113041A (en) * | 1964-08-20 | 1968-05-08 | Grace W R & Co | Corrosion-resistant battery separator |
| CN1516571A (en) * | 2001-06-18 | 2004-07-28 | 宝洁公司 | Cosmetic composition comprising discrete color domains and associated methods |
| CN102646811A (en) * | 2004-02-07 | 2012-08-22 | 株式会社Lg化学 | Organic/inorganic composite porous layer-coated electrode and electrochemical device comprising the same |
| CN104395743A (en) * | 2012-06-25 | 2015-03-04 | 思泰瑞公司 | Amperometric gas sensor |
| CN105131875A (en) * | 2015-08-26 | 2015-12-09 | 深圳市贝特瑞新能源材料股份有限公司 | Aqueous binder for lithium ion battery as well as preparation method and application thereof |
| US9350019B2 (en) * | 2006-10-26 | 2016-05-24 | Hitachi Maxell, Ltd. | Nonaqueous secondary battery and method of using the same |
| CN106654122A (en) * | 2017-01-18 | 2017-05-10 | 山东纳美德生物科技有限公司 | Preparation method of power lithium ion battery diaphragm |
-
2018
- 2018-05-25 CN CN201810514684.5A patent/CN110534818B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1113041A (en) * | 1964-08-20 | 1968-05-08 | Grace W R & Co | Corrosion-resistant battery separator |
| CN1516571A (en) * | 2001-06-18 | 2004-07-28 | 宝洁公司 | Cosmetic composition comprising discrete color domains and associated methods |
| CN102646811A (en) * | 2004-02-07 | 2012-08-22 | 株式会社Lg化学 | Organic/inorganic composite porous layer-coated electrode and electrochemical device comprising the same |
| US9350019B2 (en) * | 2006-10-26 | 2016-05-24 | Hitachi Maxell, Ltd. | Nonaqueous secondary battery and method of using the same |
| CN104395743A (en) * | 2012-06-25 | 2015-03-04 | 思泰瑞公司 | Amperometric gas sensor |
| CN105131875A (en) * | 2015-08-26 | 2015-12-09 | 深圳市贝特瑞新能源材料股份有限公司 | Aqueous binder for lithium ion battery as well as preparation method and application thereof |
| CN106654122A (en) * | 2017-01-18 | 2017-05-10 | 山东纳美德生物科技有限公司 | Preparation method of power lithium ion battery diaphragm |
Non-Patent Citations (2)
| Title |
|---|
| HUIRAN LU, ET AL.: "Effects of Different Manufacturing Processes on TEMPO-oxidized Carboxylated Cellulose Nanofiber Performance as Binder for Flexible Lithium-Ion Batteries", 《APPLIED MATERIALS & INTERFACES》 * |
| 李媛媛等: "纳米纤维素基材料在电子器件领域的应用研究进展", 《纤维素科学与技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113571673A (en) * | 2021-07-30 | 2021-10-29 | 江西安驰新能源科技有限公司 | Thick negative electrode plate, preparation method thereof and lithium ion battery |
| RU2798050C1 (en) * | 2022-10-17 | 2023-06-14 | Акционерное общество "Энергия" (АО "Энергия") | Method for preparing active mass of negative electrode of lithium-ion battery |
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| CN110534818B (en) | 2021-02-19 |
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