CN107819108A - Ternary electrode slurry, ternary electrode piece and preparation method - Google Patents
Ternary electrode slurry, ternary electrode piece and preparation method Download PDFInfo
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- CN107819108A CN107819108A CN201711076914.6A CN201711076914A CN107819108A CN 107819108 A CN107819108 A CN 107819108A CN 201711076914 A CN201711076914 A CN 201711076914A CN 107819108 A CN107819108 A CN 107819108A
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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
- H01M4/628—Inhibitors, e.g. gassing inhibitors, corrosion inhibitors
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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
- H01M4/134—Electrodes based on metals, Si or alloys
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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
- H01M4/139—Processes of manufacture
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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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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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 invention provides a kind of ternary electrode slurry, ternary electrode piece and preparation method, it is related to electrode slice technical field, is mainly prepared from the following materials：Cobalt nickel lithium manganate ternary material, conductive agent, aqueous binder and nickel dissolution inhibitor, when alleviating existing preparation water system cobalt nickel lithium manganate ternary material slurry, nickel component easily reacts with water, and complexing forms [Ni (H2O)6]2+Or hydrolysis generation Ni (OH)2With Ni (OH)3Cause the technical problem that nickel ion is consumed, reach using water as solvent, reduce environmental pollution, saved the energy, reduce the processing cost of battery, and by adding nickel dissolution inhibitor in ternary electrode slurry, to suppress the reaction of nickel in aqueous, the consumption of nickel ion is reduced, ensures the technique effect of the performance of electrode slurry.
Description
Technical field
The present invention relates to electrode slice technical field, more particularly, to a kind of ternary electrode slurry, ternary electrode piece and preparation
Method.
Background technology
The traditional energy situation day such as crude oil, coal is becoming tight, people actively find it is alternative it is this can not possibly production-goods again
The novel energy in source.Lithium ion battery turns into focus of concern because its energy density high-environmental is pollution-free.
In new type lithium ion battery, cobalt nickel lithium manganate ternary material is good by capacity height, thermal stability, charge and discharge voltage
The excellent chemical property such as width, and widely paid close attention to.At present, during nickel-cobalt lithium manganate cathode material is configured,
Use organic solvent more, but highly volatile, substantial amounts of gas are discharged into air in pulping process due to organic solvent, it is dirty
Environment is contaminated, while the cost of organic solvent is higher, power consumption of polymer processing is big, causes the processing cost of battery to remain high.
Recently, Some Enterprises change deionized water as solvent, but due to the nickel pole in cobalt nickel lithium manganate ternary material
Yi Yushui reacts, and complexing forms [Ni (H2O)6]2+Or hydrolysis generation Ni (OH)2With Ni (OH)3, cause nickel ion to be consumed,
Influence the performance of electrode slurry.
In view of this, it is special to propose the present invention.
The content of the invention
An object of the present invention is to provide a kind of ternary electrode slurry, to reduce existing preparation water system nickle cobalt lithium manganate
During ternary material slurry, nickel component easily reacts with water, and complexing forms [Ni (H2O)6]2+Or hydrolysis generation Ni (OH)2
With Ni (OH)3, the technical problem that causes nickel ion to be consumed.
Ternary electrode slurry provided by the invention, is mainly prepared from the following materials：Cobalt nickel lithium manganate ternary material, lead
Electric agent, aqueous binder and nickel dissolution inhibitor.
Further, the quality of the cobalt nickel lithium manganate ternary material, conductive agent, aqueous binder and nickel dissolution inhibitor
Than for (90-110)：(5-15)：(2-10)：(0.2-1), it is preferably (95-105)：(8-12)：(4-8)：(0.2-1), more preferably
For (95-100)：(9-11)：(5-7)：(0.2-1).
Further, the one kind of the nickel dissolution inhibitor in hydrochloric acid, sulfuric acid, acetic acid and benzoic acid, preferably salt
Acid and/or sulfuric acid, more preferably hydrochloric acid.
Further, the conductive agent in graphite, carbon black, acetylene black, graphene, carbon fiber and CNT extremely
Few one kind, the preferably mixture of graphite and/or carbon black, more preferably graphite and carbon black.
Further, the aqueous binder is selected from acrylic compounds aqueous binder, polyvinyl alcohol aqueous binder, gathered
At least one in urethane class aqueous binder, epoxy aqueous binder, phenolic aldehyde aqueous binder and organic silicon aqueous binder
Kind, preferably acrylic compounds aqueous binder, more preferably acrylic acid modified chitosan.
The two of the object of the invention are the preparation method for providing above-mentioned ternary electrode slurry, ternary electrode provided by the invention
The preparation method of slurry, cobalt nickel lithium manganate ternary material, conductive agent, aqueous binder, nickel dissolution inhibitor are dissolved in the water,
It is well mixed, that is, ternary electrode slurry is made.
Further, the viscosity of ternary electrode slurry is 3000-5000mpa.s, pH value 8-10.
Further, first cobalt nickel lithium manganate ternary material and conductive agent are well mixed, add aqueous binder and water
It is well mixed, it is eventually adding nickel dissolution inhibitor and is well mixed, ternary electrode slurry is made.
The third object of the present invention is to provide a kind of ternary electrode piece, mainly prepared by ternary electrode slurry and base material and
Into the one kind of the base material in aluminium foil, copper foil, stainless steel foil and iron foil, preferably aluminium foil.
The fourth object of the present invention is the preparation method for providing above-mentioned ternary electrode piece, comprises the following steps：First by three
First electrode slurry is coated on base material, then is toasted, roll-in and cutting, that is, ternary electrode piece is made.
Ternary electrode slurry provided by the invention, using water as solvent, reduces environmental pollution, has saved the energy, reduce
The processing cost of battery, and by adding nickel dissolution inhibitor in ternary electrode slurry, to suppress nickel in aqueous anti-
Should, the consumption of nickel ion is reduced, ensures the performance of electrode slurry.
The preparation method of ternary electrode slurry provided by the invention, technique is simple, easy to operate, raw suitable for big industry
Production, can save substantial amounts of man power and material.
Ternary electrode piece provided by the invention, by coating ternary electrode slurry provided by the invention on base material, reduce
Environmental pollution, has saved the energy, reduces the processing cost of battery, and passes through and nickel dissolving suppression is added in the ternary electrode slurry
Preparation, to suppress the reaction of nickel in aqueous, the consumption of nickel ion is reduced, ensure that the performance of ternary electrode piece.
The preparation method of ternary electrode piece provided by the invention, technique is simple, easy to operate, suitable for big industrial production,
Substantial amounts of man power and material can be saved.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the discharge-rate test chart of the ternary electrode piece of the embodiment of the present invention 16 and comparative example 3-4 offers；
Fig. 2 is the Life Cycle test chart for the ternary electrode piece that embodiment 16 provides；
Fig. 3 is the Life Cycle test chart for the ternary electrode piece that comparative example 3 provides；
Fig. 4 is the Life Cycle test chart for the ternary electrode piece that comparative example 4 provides.
Embodiment
Technical scheme is clearly and completely described below, it is clear that described embodiment is the present invention
Part of the embodiment, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
The every other embodiment obtained under the premise of creative work is made, belongs to the scope of protection of the invention.
According to the first aspect of the invention, the invention provides a kind of ternary electrode slurry, mainly by following raw material system
It is standby to form：Cobalt nickel lithium manganate ternary material, conductive agent, aqueous binder and nickel dissolution inhibitor.
Ternary electrode slurry provided by the invention, using water as solvent, reduces environmental pollution, has saved the energy, reduce
The processing cost of battery, and by adding nickel dissolution inhibitor in ternary electrode slurry, to suppress nickel in aqueous anti-
Should, the consumption of nickel ion is reduced, ensures the performance of electrode slurry.
In the preferred embodiment of the present invention, cobalt nickel lithium manganate ternary material, conductive agent, aqueous binder, nickel
The mass ratio of dissolution inhibitor is (70-90)：(5-15)：(2-10)：(0.2-1), it is preferably (75-85)：(8-12)：(4-8)：
(0.2-1), more preferably (78-82)：(9-11)：(5-7)：(0.2-1).
In the present invention, cobalt nickel lithium manganate ternary material is black solid powder, and good fluidity, no caking thing, is ternary
One of critical material of electrode slurry, commercially available to be placed in Dongguan Shanshan Battery Materials Co., Ltd., Ningbo gold and new material limited
Company or Beijing Dangsheng Material Science Co., Ltd.
The effect of nickel dissolution inhibitor is and [Ni (H2O)6]2+、Ni(OH)2With Ni (OH)3React, generate nickel ion,
To suppress the dissolving of nickel component, so as to ensure the performance of ternary electrode slurry.
In the preferred embodiment of the present invention, water is as solvent, to avoid the process in the configuration of ternary electrode slurry
In, the volatilization of organic substance is produced, so as to environmental pollution, while solvent is adopted water as and substitutes organic solvent, additionally it is possible to reduce by three
The processing cost of first electrode slurry.
In the preferred embodiment of the present invention, cobalt nickel lithium manganate ternary material, conductive agent, aqueous binder and nickel are molten
The mass ratio for solving inhibitor is (70-90)：(5-15)：(2-10)：(0.2-1), it is preferably (75-85)：(8-12)：(4-8)：
(0.2-1), more preferably (78-82)：(9-11)：(5-7)：(0.2-1).
By by cobalt nickel lithium manganate ternary material, conductive agent, aqueous binder and nickel dissolution inhibitor at (70-90)：(5-
15)：(2-10)：Coordinated in the range of (0.2-1) mass ratio so that the excellent performance of ternary electrode slurry, especially when four
The mass ratio of person is (75-85)：(8-12)：(4-8)：When (0.2-1), the capacity of three made electrode slices is higher, thermostabilization
More preferably, when four mass ratio is (78-82)：(9-11)：(5-7)：(0.2-1), the performance of made ternary electrode piece more have
It is excellent.
In the preferred embodiment of the present invention, nickel dissolution inhibitor is in hydrochloric acid, sulfuric acid, acetic acid and benzoic acid
One kind, preferably hydrochloric acid and/or sulfuric acid, more preferably hydrochloric acid.
In the typical but non-limiting embodiment of the present invention, nickel dissolution inhibitor is acidic materials, acidic materials
Can be with [Ni (H2O)6]2+、Ni(OH)2With Ni (OH)3React, generate nickel ion, to suppress the dissolving of nickel component, so as to
Ensure the performance of ternary electrode slurry；When nickel dissolution inhibitor is hydrochloric acid and/or sulfuric acid, it is more easy to and [Ni (H2O)6]2+、Ni
(OH)2With Ni (OH)3React, its dissolution inhibition effect to nickel component is good, especially when nickel dissolution inhibitor is hydrochloric acid
When, it is better to the dissolution inhibition of nickel component.
In the preferred embodiment of the present invention, conductive agent is selected from graphite, carbon black, acetylene black, graphene, carbon fiber
At least one of with CNT, the preferably mixture of graphite and/or carbon black, more preferably graphite and carbon black.
Conductive agent is to ensure that electrode has good charge-discharge performance, a certain amount of conduction is added when pole piece makes
Material, play a part of collecting micro-current between active material, between active material and collector, to improve in electrode material
Migration rate, improve the efficiency for charge-discharge of electrode.
When conductive agent is graphite and/or carbon black, it is more easily dispersed in aqueous solvent, forms uniform and stable ternary electricity
Pole slurry, and made ternary electrode piece performance is excellent, it is made especially when conductive agent is the mixture of graphite and carbon black
Into ternary electrode piece performance more preferably.
In the preferred embodiment of the present invention, aqueous binder is selected from acrylic compounds aqueous binder, polyethylene
Alcohols aqueous binder, polyurethanes aqueous binder, epoxy aqueous binder, phenolic aldehyde aqueous binder and organic silicon are water-based
At least one of adhesive, preferably acrylic compounds aqueous binder, more preferably acrylic acid modified chitosan.
In the present invention, aqueous binder is used to ternary electrode slurry being adhered to base material, to form ternary electrode piece.
In a preferred embodiment of this invention, safer from aqueous binder, more environmentally friendly, the pollution to environment is smaller, and cost is also more
Cheap, operation is also easier.
When aqueous binder is that acrylic compounds aqueous binder, polyvinyl alcohol aqueous binder, polyurethanes are water-based viscous
, can be by three when any of mixture, epoxy aqueous binder, phenolic aldehyde aqueous binder and organic silicon aqueous binder
First electrode slurry is adhered on base material, and when from acrylic compounds aqueous binder, its dispersive property in aqueous is excellent,
Adhesion property is good, and especially when from acrylic acid modified chitosan as adhesive, its is pollution-free, more environmentally friendly, with ternary
The synergy of other raw materials is more preferable in electrode slurry so that the adhesiving effect of ternary electrode slurry and base material is more preferably.
According to the second aspect of the invention, the invention provides the preparation method of above-mentioned ternary electrode slurry, including such as
Lower step：
Cobalt nickel lithium manganate ternary material, conductive agent, aqueous binder and nickel dissolution inhibitor are dissolved in the water, mixing is equal
It is even, that is, ternary electrode slurry is made.
The preparation method of ternary electrode slurry provided by the invention, technique is simple, easy to operate, raw suitable for big industry
Production, can save substantial amounts of man power and material.
In a preferred embodiment of the invention, the viscosity of ternary electrode slurry is 3000-5000mpa.s, pH value 8-
10。
It is 3000-5000mpa.s, pH value 8-10 by controlling the viscosity of ternary electrode slurry so that ternary electrode is starched
Material is more easy to be coated on base material, does not produce sagging or caking phenomenon, more causes the combination property of made ternary electrode piece more
To be excellent.
In the preferred embodiment of the present invention, in ternary electrode slurry preparation process is carried out, first by nickel cobalt manganese
Sour lithium ternary material and conductive agent are well mixed, and add water and aqueous binder is well mixed, be eventually adding nickel dissolution inhibition
Agent is well mixed, and ternary electrode slurry is made.
In the typical but non-limiting preparation method of ternary electrode slurry, cobalt nickel lithium manganate ternary material and it will first lead
Electric agent is mixed, dry-mixed 0.5-1h, then water and aqueous binder are added to the mixture of cobalt nickel lithium manganate ternary material and conductive agent
In, pureed stirring 1.5-2h, after adding the water stirring 0.5h of surplus, then nickel dissolution inhibitor added in above-mentioned solvent, i.e.,
Ternary electrode slurry is made.
According to the third aspect of the present invention, the invention provides a kind of ternary electrode piece, mainly by ternary electrode slurry
It is prepared with base material, the one kind of the base material in aluminium foil, copper foil, stainless steel foil and iron foil, preferably aluminium foil.
Ternary electrode piece provided by the invention, by above-mentioned water system ternary electrode slurry is coated on base material prepare and
Into reducing environmental pollution, reduce the cost of ternary electrode piece, ensure that the performance of ternary electrode piece.
The fourth aspect of the invention, there is provided the preparation method of above-mentioned ternary electrode piece, comprise the following steps：First by three
First electrode slurry is coated on base material, then is toasted, roll-in and cutting, that is, ternary electrode piece is made, it is preferred that baking temperature
For 40-85 DEG C.
The preparation method of ternary electrode piece provided by the invention, technique is simple, easy to operate, suitable for big industrial production,
Substantial amounts of man power and material can be saved.
The preparation method of ternary electrode piece provided by the invention, when being toasted after coating, baking temperature is controlled in 40-
Between 85 DEG C, and conventionally employed organic solvent as solvent ternary electrode slurry need between 95-120 DEG C could incite somebody to action
Organic solvent evaporation, therefore, ternary electrode piece is prepared using ternary electrode piece preparation method provided by the invention, it is more energy efficient, more
Environmental protection, power consumption save 30-50%.
Technical scheme provided by the invention is further described with reference to embodiment and comparative example.
Embodiment 1
A kind of ternary electrode slurry is present embodiments provided, is mainly prepared by the following raw material according to the mass fraction：
90 parts of cobalt nickel lithium manganate ternary material, 15 parts of graphite, acrylic acid modified 2 parts of chitosan, 0.3 part of hydrochloric acid.
Embodiment 2
A kind of ternary electrode slurry is present embodiments provided, is mainly prepared by the following raw material according to the mass fraction：
110 parts of cobalt nickel lithium manganate ternary material, 5 parts of CNT, acrylic acid modified 10 parts of chitosan, 1 part of benzoic acid.
Embodiment 3
A kind of ternary electrode slurry is present embodiments provided, is mainly prepared by the following raw material according to the mass fraction：
95 parts of cobalt nickel lithium manganate ternary material, 8 parts of carbon fiber, acrylic acid modified 4 parts of chitosan, 0.4 part of sulfuric acid.
Embodiment 4
A kind of ternary electrode slurry is present embodiments provided, is mainly prepared by the following raw material according to the mass fraction：
105 parts of cobalt nickel lithium manganate ternary material, 12 parts of acetylene black, acrylic acid modified 8 parts of chitosan, 0.8 part of acetic acid.
Embodiment 5
A kind of ternary electrode slurry is present embodiments provided, is mainly prepared by the following raw material according to the mass fraction：
100 parts of cobalt nickel lithium manganate ternary material, graphene part, acrylic acid modified 5 parts of chitosan, 0.5 part of hydrochloric acid.
Embodiment 6
A kind of ternary electrode slurry is present embodiments provided, is mainly prepared by the following raw material according to the mass fraction：
98 parts of cobalt nickel lithium manganate ternary material, 6 parts of graphite, 5 parts of carbon black, acrylic acid modified 7 parts of chitosan, 0.7 part of hydrochloric acid.
Embodiment 7
A kind of ternary electrode slurry is present embodiments provided, is mainly prepared by the following raw material according to the mass fraction：
96 parts of cobalt nickel lithium manganate ternary material, 5 parts of graphite, 5 parts of carbon black, acrylic acid modified 6 parts of chitosan, 0.6 part of hydrochloric acid.
Embodiment 8
A kind of ternary electrode slurry is present embodiments provided, is mainly prepared by the following raw material according to the mass fraction：
96 parts of cobalt nickel lithium manganate ternary material, 1 part of graphite, 2 parts of carbon black, acrylic acid modified 15 parts of chitosan, 1.5 parts of hydrochloric acid.
Embodiment 9
A kind of ternary electrode slurry is present embodiments provided, is mainly prepared by the following raw material according to the mass fraction：
96 parts of cobalt nickel lithium manganate ternary material, 10 parts of graphite, 10 parts of carbon black, acrylic acid modified 3 parts of chitosan, 0.1 part of hydrochloric acid.
The ternary electrode slurry that above-described embodiment 1-9 is provided, is prepared by the following method：
First cobalt nickel lithium manganate ternary material and conductive agent are mixed, dry-mixed 0.5-1h, then water and acrylic acid modified shell are gathered
Sugar is added in the mixture of cobalt nickel lithium manganate ternary material and conductive agent, pureed stirring 1.5-2h, adds the water stirring of surplus
After 0.5h, then by the above-mentioned solvent of nickel dissolution inhibitor addition, regulation viscosity is 3000-5000mpa.s, that is, ternary electrode is made
Slurry.
Comparative example 1
This comparative example provides a kind of oil system ternary electrode slurry, and the difference of this comparative example and embodiment 7 is, adopts
Water is replaced to be employed as Kynoar instead of acrylic acid modified chitosan as bonding as solvent by the use of methyl pyrrolidone
Agent.
Comparative example 2
This comparative example provides a kind of ternary electrode slurry, and the difference of this comparative example and embodiment 7 is, does not add
Nickel dissolution inhibitor.
The preparation method for the ternary electrode slurry that above-mentioned comparative example 1-2 is provided is same as Example 7, will not be repeated here.
Embodiment 10-18
Embodiment 10-18 is each provided with a kind of ternary electrode piece, the ternary electrode slurry that is provided respectively by embodiment 1-9 and
Aluminium foil is prepared.
The ternary electrode piece that embodiment 10-18 is provided is prepared as follows：
First ternary electrode slurry is coated on aluminium foil, then baking drying is carried out between 40-85 DEG C using baking oven, then
Roll-in and cutting are carried out again, that is, ternary electrode piece is made.
Comparative example 3-4
Comparative example 3-4 is each provided with a kind of ternary electrode piece, and the ternary electrode slurry provided respectively by comparative example 1-2 is coated with
It is prepared on aluminium foil.
The difference for the ternary electrode piece that the preparation method for the ternary electrode piece that comparative example 3 provides provides with embodiment 14
It is, the temperature toasted is 90-120 DEG C.
The preparation side for the ternary electrode piece that the preparation method for the ternary electrode piece that comparative example 4 provides provides with embodiment 14
Method, it will not be repeated here.
Test example 1
The ternary electrode piece that above-described embodiment 10-18 and comparative example 3-4 are provided carries out capacitance and internal resistance detection, detection
As a result it is as shown in the table：
The ternary electrode chip capacitor amount of table 1 and internal resistance performance data table
| Gram volume (mAh/g) | Internal resistance (m Ω) | |
| Embodiment 10 | 155.02 | 16.6 |
| Embodiment 11 | 155.13 | 16.5 |
| Embodiment 12 | 155.37 | 16.5 |
| Embodiment 13 | 155.42 | 16.4 |
| Embodiment 14 | 155.58 | 16.4 |
| Embodiment 15 | 155.61 | 16.3 |
| Embodiment 16 | 155.77 | 16.2 |
| Embodiment 17 | 153.86 | 16.6 |
| Embodiment 18 | 154.21 | 16.6 |
| Comparative example 3 | 155.99 | 16.6 |
| Comparative example 4 | 152.36 | 17.1 |
As it can be seen from table 1 ternary electrode piece prepared by the water system ternary electrode slurry that the present embodiment 10-16 is provided, its
Gram volume is not higher than 16.6m Ω more than 155mAh/g, internal resistance, with the ternary that the organic solvent that comparative example 3 provides is solvent
The ternary electrode piece performance that electrode slurry is prepared is basically identical, while the ternary electrode piece that embodiment 10-16 is provided is adopted
Slurry using water as solvent, reduces environmental pollution, has saved the energy, reduces the processing cost of battery.
It is can be seen that from the contrast of embodiment 16 and comparative example 4 by adding nickel dissolution inhibition in ternary electrode slurry
Agent, it can significantly suppress the reaction of nickel in aqueous, reduce the consumption of nickel ion, ensure the performance of electrode slurry.
It is can be seen that from embodiment 10-16 and embodiment 17-18 contrast when in ternary electrode slurry, nickle cobalt lithium manganate
Ternary material, conductive agent, the mass ratio of aqueous binder and nickel dissolution inhibitor are (70-90)：(5-15)：(2-10)：(0.2-
1) when, the ternary electrode chip capacitor amount that made ternary electrode slurry is prepared is bigger, and internal resistance is smaller, and combination property is more excellent
It is different.
Test example 2
The ternary electrode piece that embodiment 16 provides and the ternary electrode piece that comparative example 3-4 is provided are subjected to discharge-rate survey
Examination, test result is as shown in figure 1, discharge-rate and the comparative example 3 for the ternary electrode piece that embodiment 16 provides as can be seen from Figure 1
The discharge-rate of the ternary electrode piece of offer is basically identical, and be significantly higher than that contrast 4 provides does not add nickel dissolution inhibitor
The discharge-rate for the ternary electrode piece that water system ternary electrode electrode slurry is prepared, this explanation are provided by the invention using water to be molten
The discharge-rate of the ternary electrode slurry of agent and electric discharge of the tradition using methyl pyrrolidone as the oil system ternary electrode slurry of solvent
Multiplying power is suitable, is significantly higher than the water system ternary electrode slurry for not adding nickel dissolution inhibitor.
Test example 3
The ternary electrode piece that embodiment 16 provides and the ternary electrode piece that comparative example 3-4 is provided are subjected to Life Cycle survey
Examination, test result result as in Figure 2-4, Fig. 2 be embodiment 16 provide ternary electrode piece Life Cycle test chart, Fig. 3
The Life Cycle test chart of the ternary electrode piece provided for comparative example 3；Fig. 4 is the life-span for the ternary electrode piece that comparative example 4 provides
Loop test figure, from Fig. 2-4 as can be seen that the ternary electrode piece that embodiment 16 provides circulates 220 times, capacitance is remaining
98.12%, the ternary electrode piece that comparative example 3 provides circulates 220 times, capacitance residue 98.15%, the ternary that comparative example 4 provides
Electrode slice circulates 220 times, capacitance residue 96.22%, and this illustrates the ternary electrode slurry provided by the invention using water as solvent
Life-span and tradition it is suitable as the life-span of the oil system ternary electrode slurry of solvent using methyl pyrrolidone, be significantly higher than and do not add nickel
The water system ternary electrode slurry of dissolution inhibitor.
In addition, show that the ternary electrode piece that embodiment 16 provides is consumed in baking process by electric energy loss statistics
Electric energy reduce 35% than the electric energy that the ternary electrode piece that comparative example 3 provides is consumed in baking process, this illustrates this hair
Bright offer using water as the ternary electrode piece of solvent in preparation process it is more energy efficient, it is more environmentally friendly.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a kind of ternary electrode slurry, it is characterised in that be mainly prepared from the following materials：Cobalt nickel lithium manganate ternary material,
Conductive agent, aqueous binder and nickel dissolution inhibitor.
2. ternary electrode slurry according to claim 1, it is characterised in that the cobalt nickel lithium manganate ternary material, conduction
The mass ratio of agent, aqueous binder and nickel dissolution inhibitor is (90-110)：(5-15)：(2-10)：(0.2-1), it is preferably
(95-105)：(8-12)：(4-8)：(0.2-1), more preferably (95-100)：(9-11)：(5-7)：(0.2-1).
3. ternary electrode slurry according to claim 1 or 2, it is characterised in that the nickel dissolution inhibitor be selected from hydrochloric acid,
One kind in sulfuric acid, acetic acid and benzoic acid, preferably hydrochloric acid and/or sulfuric acid, more preferably hydrochloric acid.
4. ternary electrode slurry according to claim 1 or 2, it is characterised in that the conductive agent be selected from graphite, carbon black,
At least one of acetylene black, graphene, carbon fiber and CNT, preferably graphite and/or carbon black, more preferably graphite with
The mixture of carbon black.
5. ternary electrode slurry according to claim 1 or 2, it is characterised in that the aqueous binder is selected from acrylic acid
Class aqueous binder, polyvinyl alcohol aqueous binder, polyurethanes aqueous binder, epoxy aqueous binder, phenolic aldehyde are water-based
At least one of adhesive and organic silicon aqueous binder, preferably acrylic compounds aqueous binder, more preferably propylene
Sour modification of chitosan.
6. the preparation method of the ternary electrode slurry according to any one of claim 1-5, it is characterised in that including as follows
Step：
Cobalt nickel lithium manganate ternary material, conductive agent, aqueous binder, nickel dissolution inhibitor are dissolved in the water, are well mixed, i.e.,
Ternary electrode slurry is made.
7. the preparation method of ternary electrode slurry according to claim 6, it is characterised in that the ternary electrode slurry
Viscosity is 3000-5000mpa.s, pH value 8-10.
8. the preparation method of ternary electrode slurry according to claim 6, it is characterised in that first by nickle cobalt lithium manganate ternary
Material and conductive agent are well mixed, and add water and aqueous binder is well mixed, and it is equal to be eventually adding the mixing of nickel dissolution inhibitor
It is even, ternary electrode slurry is made.
9. a kind of ternary electrode piece, it is characterised in that mainly as the ternary electrode slurry and base described in claim any one of 1-5
Material is prepared, the one kind of the base material in aluminium foil, copper foil, stainless steel foil and iron foil, preferably aluminium foil.
10. the preparation method of ternary electrode piece according to claim 9, it is characterised in that comprise the following steps：First by three
First electrode slurry is coated on base material, then is toasted, roll-in and cutting, that is, ternary electrode piece is made, it is preferred that baking temperature
For 40-85 DEG C.
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