CN109494345A - A kind of battery preparation method and battery promoting lithium ion battery safety performance - Google Patents
A kind of battery preparation method and battery promoting lithium ion battery safety performance Download PDFInfo
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- CN109494345A CN109494345A CN201811221891.8A CN201811221891A CN109494345A CN 109494345 A CN109494345 A CN 109494345A CN 201811221891 A CN201811221891 A CN 201811221891A CN 109494345 A CN109494345 A CN 109494345A
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- Prior art keywords
- battery
- lithium ion
- safety performance
- preparation
- dopamine
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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
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
-
- 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
- H01M10/058—Construction or manufacture
-
- 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
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/665—Composites
- H01M4/667—Composites in the form of layers, e.g. coatings
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
A kind of battery preparation method and battery promoting lithium ion battery safety performance, can improve ternary material power accumulator security performance.The following steps are included: S100, preparation poly-dopamine lotion；S200, above-mentioned poly-dopamine lotion is uniformly coated in copper foil surface, then dried；S300, it prepares anode electrode slurry and then is coated uniformly on through forming anode electrode on step S200 treated copper foil；S400, by cathode electrode and above-mentioned anode electrode, composition battery roll core is isolated with diaphragm；S500, squarely ternary battery is prepared using the resulting battery roll core of step S400.The present invention coats a strata dopamine on cathode current collector surface, on the one hand the adhesive property of negative electrode tab is improved, on the other hand enhance pole piece flexibility, can effectively improve battery occur puncture and squeeze when pole piece dislocation, stress and there is phenomena such as being crushed, dropping off.When pole piece occur above-mentioned phenomenon when inside battery locally or globally internal short-circuit and whole thermal runaway occurs.
Description
Technical field
The present invention relates to lithium battery production fields, and in particular to a kind of battery preparation for promoting lithium ion battery safety performance
Method and battery.
Background technique
Since electric vehicle energy spatial design is limited and driving cycle is complicated, energy density, power density to battery
With the requirement with higher such as temperature characterisitic, and ternary material power accumulator is in energy density, power density and temperature characterisitic
Advantage make its electric vehicle using it is upper have bright prospects.Existing ternary material power accumulator is close in energy density, power
There is very big room for promotion in terms of degree and temperature characterisitic, be the substitute products of the following automobile-used power accumulator, have preferable
Development and application value.And the natural structure of ternary material causes its security performance bad, limits it in the fast of power market
Speed application, domestic and international expert do not solve the safety problem of product, the present invention fundamentally by means such as modified, surface claddings yet
From practical application angle, battery composition is optimized, effectively improves the security performance (squeezing, acupuncture performance) of product.
Summary of the invention
A kind of battery preparation method and battery promoting lithium ion battery safety performance proposed by the present invention, can improve ternary
Material power accumulator security performance.
To achieve the above object, the invention adopts the following technical scheme:
A kind of battery preparation method promoting lithium ion battery safety performance, comprising the following steps:
S100, preparation poly-dopamine lotion；
S200, above-mentioned poly-dopamine lotion is uniformly coated in copper foil surface, then dried；
S300, it prepares anode electrode slurry and then is coated uniformly on through forming anode on step S200 treated copper foil
Electrode；
S400, by cathode electrode and above-mentioned anode electrode, composition battery roll core is isolated with diaphragm；
S500, battery is prepared into using the resulting battery roll core of step S400.
Further, the step S100 is specifically included:
Dry polystyrene powder is immersed in the Tris solution of Dopamine hydrochloride, is stirred at room temperature, it is micro- that PDA is made through 36h
Ball solution, i.e. poly-dopamine lotion.
Further, the step S100 is specifically included:
Dopamine solution, the pH=of the hydrochloric acid Tris buffer are added in pre-configured hydrochloric acid Tris buffer
The concentration of 8-8.5, the dopamine solution are 2.5g/L, stir 20-36h under 30 ± 5 DEG C of environment；
Then polyethylene powder is added, 36h is stirred at 25 ± 5 DEG C, PDA microspheres solution is made.
Further, using 60~90 DEG C of drying in the step S200.
Further, the diaphragm intensity in the step S400 is in 120Mpa~160Mpa.
Further, preparing anode electrode slurry in the step S300 includes:
Anode electrode active material is mixed with conductive agent, binder, after dispersion is sufficiently stirred, forms slurry.
Further, the anode electrode active material be natural graphite, it is artificial graphite, modified natural graphite, soft carbon, hard
One of carbon, carbonaceous mesophase spherules, polysilicon nanometer particle, the sub- silicon micron particles of oxidation are a variety of.
Further, the cathode active material that the cathode electrode uses is Li (Ni (1-x-y) CoyMnx) O2, wherein 0
≤ x≤1,0≤y≤1.
Further, the diaphragm in the step S400 uses lateral, longitudinal strength in the poly- second of 120Mpa~160Mpa
Alkene is made.
A kind of battery, the battery prepared using any one of the above method.
As shown from the above technical solution, the present invention coats a strata dopamine on cathode current collector surface, on the one hand improves
On the other hand the adhesive property of negative electrode tab enhances the flexibility of pole piece, can effectively improve battery when occurring to puncture and squeeze
Pole piece dislocation, stress and there is phenomena such as being crushed, dropping off.When above-mentioned phenomenon occurs for pole piece, inside battery is locally or globally interior short
Road and whole thermal runaway occurs.
It ensures that diaphragm has some strength simultaneously, on the one hand can ensure battery tearing when by external force, while certain
Intensity can ensure that the toughness of diaphragm and shrinking percentage are moderate.
Detailed description of the invention
Fig. 1 is the flow diagram of the method for the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.
As shown in Figure 1, present example provides a kind of battery preparation method for promoting lithium ion battery safety performance, including
Following steps:
S100, preparation poly-dopamine lotion；
S200, above-mentioned poly-dopamine lotion is uniformly coated in copper foil surface, then dried；
S300, it prepares anode electrode slurry and then is coated uniformly on through forming anode on step S200 treated copper foil
Electrode；
S400, by cathode electrode and above-mentioned anode electrode, composition battery roll core is isolated with diaphragm；
S500, battery is prepared into using the resulting battery roll core of step S400.
Wherein,
The step S100 is specifically included:
Dopamine solution, the pH=of the hydrochloric acid Tris buffer are added in pre-configured hydrochloric acid Tris buffer
The concentration of 8-8.5, the dopamine solution are 2.5g/L, stir 20-36h under 30 ± 5 DEG C of environment；
Then polyethylene powder is added, 36h is stirred at 25 ± 5 DEG C, PDA microspheres solution is made.；
Using 60~90 DEG C of drying in the step S200；It on the one hand is to ensure that moisture can gradually evaporate, second is excessively high
Temperature easily causes copper foil to aoxidize, and causes matrix brittle.
Diaphragm intensity in the step S400 is in 120Mpa~160Mpa；The section intensity can ensure the rate of being pressed through
Product heating properties are not influenced simultaneously.
It includes: by anode electrode active material and conductive agent, binder that anode electrode slurry is prepared in the step S300
Mixing after dispersion is sufficiently stirred, forms slurry.
The anode electrode active material is natural graphite, artificial graphite, modified natural graphite, soft carbon, hard carbon, interphase
One of carbosphere, polysilicon nanometer particle, the sub- silicon micron particles of oxidation are a variety of.
The cathode active material that the cathode electrode uses is Li (Ni (1-x-y) CoyMnx) O2, wherein 0≤x≤1,0≤
Y≤1, made battery capacity is in 8~100Ah.
The present embodiment also provides the battery produced using above-mentioned preparation method.
Specific application example is as follows:
Embodiment 1
1. being anode active material by cathode, artificial graphite of Li (Ni0.6Co0.2Mn0.2) O2, in anode current collector body surface
The poly-dopamine layer of face coating 1um；
2. then will between lateral, longitudinal strength diaphragm made of the polyethylene of 140mpa insertion anode and cathode
Battery core is put into rectangular aluminium casing, is injected with ethylene carbonate (EC): dimethyl carbonate (DMC): methyl ethyl carbonate (EMC)=
The electrolyte of 3:4:3 and 1.1M LiPF6 is to be made the rectangular aluminum-shell battery of 40Ah.
Comparative example 1
1. being anode active material by cathode, artificial graphite of Li (Ni0.6Co0.2Mn0.2) O2；
2. then battery core is put into rectangular aluminium casing between the insertion anode of the diaphragm made of polyethylene and cathode,
It is injected with ethylene carbonate (EC): dimethyl carbonate (DMC): methyl ethyl carbonate (EMC)=3:4:3 and 1.1M LiPF6 electrolysis
Matter is to be made the rectangular aluminum-shell battery of 40Ah.
Embodiment 2
1. being anode active material by cathode, natural graphite of Li (Ni0.7Co0.2Mn0.1) O2, in anode current collector body surface
The poly-dopamine layer of face coating 1.5um；
2. then will between lateral, longitudinal strength diaphragm made of the polyethylene of 150mpa insertion anode and cathode
Battery core is put into rectangular aluminium casing, is injected with ethylene carbonate (EC): dimethyl carbonate (DMC): methyl ethyl carbonate (EMC)=
The electrolyte of 3:4:3 and 1.15M LiPF6 is to be made the rectangular aluminum-shell battery of 50Ah.
Comparative example 2
1. being anode active material by cathode, natural graphite of Li (Ni0.7Co0.2Mn0.1) O2；
2. then battery core is put into rectangular aluminium casing between the insertion anode of the diaphragm made of polyethylene and cathode,
It is injected with ethylene carbonate (EC): dimethyl carbonate (DMC): methyl ethyl carbonate (EMC)=3:4:3 and 1.15M LiPF6 electricity
Matter is solved so that the rectangular aluminum-shell battery of 50Ah is made.
Embodiment 3
1. being anode active material by cathode, natural graphite of Li (Ni0.8Co0.1Mn0.1) O2, in anode current collector body surface
The poly-dopamine layer of face coating 1.5um；
2. then will between lateral, longitudinal strength diaphragm made of the polyethylene of 150mpa insertion anode and cathode
Battery core is put into rectangular aluminium casing, is injected with ethylene carbonate (EC): dimethyl carbonate (DMC): methyl ethyl carbonate (EMC)=
The electrolyte of 3:4:3 and 1.15M LiPF6 is to be made the rectangular aluminum-shell battery of 55Ah.
Comparative example 3
1. being anode active material by cathode, natural graphite of Li (Ni0.8Co0.1Mn0.1) O2；
2. then battery core is put into rectangular aluminium casing between the insertion anode of the diaphragm made of polyethylene and cathode,
It is injected with ethylene carbonate (EC): dimethyl carbonate (DMC): methyl ethyl carbonate (EMC)=3:4:3 and 1.15M LiPF6 electricity
Matter is solved so that the rectangular aluminum-shell battery of 55Ah is made.
Above-mentioned 3 embodiments and 3 comparative examples are carried out respectively squeeze and pin prick test, as a result shown in the following table 1:
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of battery preparation method for promoting lithium ion battery safety performance, it is characterised in that: the following steps are included:
S100, preparation poly-dopamine lotion；
S200, above-mentioned poly-dopamine lotion is uniformly coated in copper foil surface, then dried；
S300, it prepares anode electrode slurry and then is coated uniformly on through forming anode electrode on step S200 treated copper foil；
S400, by cathode electrode and above-mentioned anode electrode, composition battery roll core is isolated with diaphragm；
S500, battery is prepared into using the resulting battery roll core of step S400.
2. the battery preparation method according to claim 1 for promoting lithium ion battery safety performance, it is characterised in that: described
Step S100 is specifically included:
Dry polystyrene powder is immersed in the Tris solution of Dopamine hydrochloride, is stirred at room temperature, it is molten that PDA microballoon is made through 36h
Liquid, i.e. poly-dopamine lotion.
3. the battery preparation method according to claim 2 for promoting lithium ion battery safety performance, it is characterised in that: described
Step S100 is specifically included:
Dopamine solution, pH=8- of the hydrochloric acid Tris buffer are added in pre-configured hydrochloric acid Tris buffer
8.5, the concentration of the dopamine solution is 2.5g/L, stirs 20-36h under 30 ± 5 DEG C of environment；
Then polyethylene powder is added, 36h is stirred at 25 ± 5 DEG C, PDA microspheres solution is made.
4. the battery preparation method according to claim 1 for promoting lithium ion battery safety performance, it is characterised in that: described
Using 60 ~ 90 DEG C of drying in step S200.
5. the battery preparation method according to claim 1 for promoting lithium ion battery safety performance, it is characterised in that: described
Diaphragm intensity in step S400 is in the Mpa of 120Mpa ~ 160.
6. the battery preparation method according to claim 1 for promoting lithium ion battery safety performance, it is characterised in that: described
Anode electrode slurry is prepared in step S300 includes:
Anode electrode active material is mixed with conductive agent, binder, after dispersion is sufficiently stirred, forms slurry.
7. the battery preparation method according to claim 6 for promoting lithium ion battery safety performance, it is characterised in that: described
Anode electrode active material is natural graphite, artificial graphite, modified natural graphite, soft carbon, hard carbon, carbonaceous mesophase spherules, polycrystalline
One of nano silicon particles, the sub- silicon micron particles of oxidation are a variety of.
8. the battery preparation method according to claim 1 for promoting lithium ion battery safety performance, it is characterised in that: described
The cathode active material that cathode electrode uses is Li (Ni (1-x-y) CoyMnx) O2, wherein 0≤x≤1,0≤y≤1.
9. the battery preparation method according to claim 1 for promoting lithium ion battery safety performance, it is characterised in that: described
Diaphragm in step S400 is made of lateral, polyethylene of the longitudinal strength in the Mpa of 120Mpa ~ 160.
10. a kind of battery, it is characterised in that: the battery prepared using any one method of claim 1-7.
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| CN201811221891.8A CN109494345B (en) | 2018-10-19 | 2018-10-19 | Battery preparation method for improving safety performance of lithium ion battery and battery |
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| CN201811221891.8A CN109494345B (en) | 2018-10-19 | 2018-10-19 | Battery preparation method for improving safety performance of lithium ion battery and battery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109817953A (en) * | 2019-03-25 | 2019-05-28 | 湖北锂诺新能源科技有限公司 | Prelithiation silicon-carbon cathode material and preparation method thereof and lithium ion battery |
| CN110729456A (en) * | 2019-10-25 | 2020-01-24 | 中国科学院过程工程研究所 | Electrode pole piece, and preparation method and application thereof |
| CN111564639A (en) * | 2020-05-28 | 2020-08-21 | 贝特瑞新材料集团股份有限公司 | Lithium ion battery pole piece, preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105118958A (en) * | 2015-08-13 | 2015-12-02 | 深圳市三讯电子有限公司 | Positive electrode plate and preparing method thereof and lithium ion battery |
| CN105206798A (en) * | 2015-08-13 | 2015-12-30 | 深圳市三讯电子有限公司 | Negative pole piece, preparing method thereof and lithium ion battery |
-
2018
- 2018-10-19 CN CN201811221891.8A patent/CN109494345B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105118958A (en) * | 2015-08-13 | 2015-12-02 | 深圳市三讯电子有限公司 | Positive electrode plate and preparing method thereof and lithium ion battery |
| CN105206798A (en) * | 2015-08-13 | 2015-12-30 | 深圳市三讯电子有限公司 | Negative pole piece, preparing method thereof and lithium ion battery |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109817953A (en) * | 2019-03-25 | 2019-05-28 | 湖北锂诺新能源科技有限公司 | Prelithiation silicon-carbon cathode material and preparation method thereof and lithium ion battery |
| CN110729456A (en) * | 2019-10-25 | 2020-01-24 | 中国科学院过程工程研究所 | Electrode pole piece, and preparation method and application thereof |
| CN111564639A (en) * | 2020-05-28 | 2020-08-21 | 贝特瑞新材料集团股份有限公司 | Lithium ion battery pole piece, preparation method and application thereof |
| CN111564639B (en) * | 2020-05-28 | 2023-02-28 | 贝特瑞新材料集团股份有限公司 | Lithium ion battery pole piece, preparation method and application thereof |
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