CN107994189A - A kind of preparation method of septum for lithium ion battery - Google Patents
A kind of preparation method of septum for lithium ion battery Download PDFInfo
- Publication number
- CN107994189A CN107994189A CN201711201233.8A CN201711201233A CN107994189A CN 107994189 A CN107994189 A CN 107994189A CN 201711201233 A CN201711201233 A CN 201711201233A CN 107994189 A CN107994189 A CN 107994189A
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- CN
- China
- Prior art keywords
- septum
- lithium ion
- ion battery
- preparation
- beaker
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/446—Composite material consisting of a mixture of organic and inorganic materials
-
- 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 & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Composite Materials (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of preparation method of septum for lithium ion battery, include the following steps：Prepare beaker, 30g polyvinyl chloride and 100g acetonitrile solutions are blended in beaker；The nano silicon dioxide of 30 40wt% is added, 7 9h of heating stirring at 80 120 DEG C, until forming homogeneous solution；Mixed liquor is transferred to vacuum environment, basement membrane is soaked into 2 5h in this solution, taking-up is placed in vacuum drying chamber dry 10 20h, after acetonitrile completely volatilization, forms septum for lithium ion battery.The present invention is easy to operate, is easy to industrially repeated application.More than 1 times is improved than unmodified to the imbibition rate of electrolyte, can prevent the electrolyte loss being immersed in composite membrane, so as to realize the problems such as avoiding solution leakage, pollution environment in technique, further optimization becomes new generation of green battery.Membrane electrical conductivity increases, and after 20 chargings, electricity only loses 5%, illustrates that its charging cycle performance is obviously improved.
Description
Technical field
The present invention relates to a kind of preparation method of septum for lithium ion battery, belong to field of lithium.
Background technology
Lithium battery diaphragm is both the poor conductor of electronics in itself, but also allows electrolyte ion to pass through.Usual diaphragm material
Must possess good chemistry, electrochemical stability and mechanical performance and high is kept to electrolyte during repeated charge
Spend wellability.Interface compatibility, membrane between diaphragm material and electrode are to the retentivity of electrolyte to lithium ion battery
Charge-discharge performance, cycle performance etc. have considerable influence.In order to improve membrane properties, many grinding on diagram modification existing so far
Study carefully, however, the material wettability of the preparation of these materials is bad, and be unable to Electolyte-absorptive, cause solution leakage so as to
Pollute environment；It is complicated and preparation method repeatability is bad, it is unfavorable for industrially applying.
The content of the invention
In view of the above-mentioned problems of the prior art, the object of the present invention is to provide a kind of easy to operate, it is easy in industry
The preparation method of the septum for lithium ion battery of upper application, the membrane wettability being prepared is good, and can effective Electolyte-absorptive,
Avoid producing pollution to environment.
To achieve the above object, the technical solution adopted by the present invention is：A kind of preparation method of septum for lithium ion battery, including
Following steps：
(1) prepare beaker, 30g polyvinyl chloride and 100g acetonitrile solutions are blended in beaker；
(2) nano silicon dioxide of 30-40wt%, the heating stirring 7-9h at 80-120 DEG C are added, until being formed uniform
Solution；
(3) mixed liquor is transferred to vacuum environment, basement membrane is soaked into 2-5h in this solution, taking-up is placed on vacuum drying chamber
Middle dry 10-20h,
(4) after acetonitrile completely volatilization, septum for lithium ion battery is formed.
As a preferable scheme, the nano silicon dioxide is obtained by disilazane in 100 DEG C of nitrogen treatment.
As a preferable scheme, the nano silicon dioxide is 600-800 mesh.
As a preferable scheme, in the step (2) at 80-120 DEG C heating stirring 7-9h.
The present invention is easy to operate, is easy to industrially repeated application.To the imbibition rate of electrolyte than unmodified raising
More than 1 times, it can prevent the electrolyte loss being immersed in composite membrane, membrane is shown good absorbency and retentivity, this
Not only reduce the use total amount of electrolyte, and be also greatly reduced the possibility of lithium electrode and electrolyte reaction, so that
The problems such as avoiding solution leakage, pollution environment is realized in technique, further optimization is likely to become new generation of green battery.Every
Membrane conductivity increases, and after 20 chargings, electricity only loses 5%, illustrates that its charging cycle performance has obtained substantially carrying
Rise.
Embodiment
The present invention is described in further detail with reference to embodiment.
Embodiment 1
A kind of preparation method of septum for lithium ion battery, includes the following steps：
(1) prepare beaker, 30g polyvinyl chloride and 100g acetonitrile solutions are blended in beaker；
(2) nano silicon dioxide of 30wt%, the heating stirring 7h at 80 DEG C are added, until forming homogeneous solution；
(3) mixed liquor is transferred to vacuum environment, basement membrane is soaked into 2h in this solution, taking-up is placed in vacuum drying chamber
Dry 10h,
(4) after acetonitrile completely volatilization, septum for lithium ion battery is formed.
Above-mentioned membrane is immersed into 0.5mol/L LiPF6/EC：DEC=1：1 electrolyte 1h, is picked up, filter paper is blotted with tweezers
Drop, is clipped between two panels stainless steel electrode, and using AC impedence method, electrical conductivity is measured by electrochemical workstation.
Anode, positive electrode LiNi are made with lithium piece0.8Co0.2O2, the assembled battery in the glove box of applying argon gas, by
CT2001A charge-discharge systems make constant current charge-discharge experiment, 0.1C multiplying powers, charging/discharging voltage 3.04.3V.
After testing, membrane improves more than 1 times to the imbibition rate of electrolyte than unmodified, can prevent from being immersed in composite membrane
In electrolyte loss, membrane is shown good absorbency and retentivity.And membrane electrical conductivity increases, through 20 times
After charging, electricity only loses 5%, illustrates that its charging cycle performance is obviously improved.
Embodiment 2
A kind of preparation method of septum for lithium ion battery, includes the following steps：
(1) prepare beaker, 30g polyvinyl chloride and 100g acetonitrile solutions are blended in beaker；
(2) nano silicon dioxide of 40wt%, the heating stirring 9h at 120 DEG C are added, until forming homogeneous solution；
(3) mixed liquor is transferred to vacuum environment, basement membrane is soaked into 5h in this solution, taking-up is placed in vacuum drying chamber
Dry 20h,
(4) after acetonitrile completely volatilization, septum for lithium ion battery is formed.
After testing, its performance is similar with the material prepared in embodiment 1.
Embodiment 3
A kind of preparation method of septum for lithium ion battery, includes the following steps：
(1) prepare beaker, 30g polyvinyl chloride and 100g acetonitrile solutions are blended in beaker；
(2) nano silicon dioxide of 35wt%, the heating stirring 9h at 100 DEG C are added, until forming homogeneous solution；
(3) mixed liquor is transferred to vacuum environment, basement membrane is soaked into 4h in this solution, taking-up is placed in vacuum drying chamber
Dry 15h,
(4) after acetonitrile completely volatilization, septum for lithium ion battery is formed.
After testing, its performance is similar with the material prepared in embodiment 1.
Claims (4)
1. a kind of preparation method of septum for lithium ion battery, it is characterised in that include the following steps：
(1) prepare beaker, 30g polyvinyl chloride and 100g acetonitrile solutions are blended in beaker；
(2) nano silicon dioxide of 30-40wt%, the heating stirring 7-9h at 80-120 DEG C are added, until forming homogeneous solution；
(3) mixed liquor is transferred to vacuum environment, basement membrane is soaked into 2-5h in this solution, taking-up is placed in vacuum drying chamber and does
Dry 10-20h,
(4) after acetonitrile completely volatilization, septum for lithium ion battery is formed.
A kind of 2. preparation method of septum for lithium ion battery according to claim 1, it is characterised in that the nanometer titanium dioxide
Silicon is obtained by disilazane in 100 DEG C of nitrogen treatment.
A kind of 3. preparation method of septum for lithium ion battery according to claim 1, it is characterised in that the nanometer titanium dioxide
Silicon is 600-800 mesh.
4. the preparation method of a kind of septum for lithium ion battery according to claim 1, it is characterised in that in the step (2)
The heating stirring 7-9h at 80-120 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711201233.8A CN107994189A (en) | 2017-11-27 | 2017-11-27 | A kind of preparation method of septum for lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711201233.8A CN107994189A (en) | 2017-11-27 | 2017-11-27 | A kind of preparation method of septum for lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107994189A true CN107994189A (en) | 2018-05-04 |
Family
ID=62033135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711201233.8A Withdrawn CN107994189A (en) | 2017-11-27 | 2017-11-27 | A kind of preparation method of septum for lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107994189A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112838330A (en) * | 2021-01-08 | 2021-05-25 | 厦门大学 | High-temperature-resistant modified diaphragm and preparation method thereof |
-
2017
- 2017-11-27 CN CN201711201233.8A patent/CN107994189A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112838330A (en) * | 2021-01-08 | 2021-05-25 | 厦门大学 | High-temperature-resistant modified diaphragm and preparation method thereof |
| CN112838330B (en) * | 2021-01-08 | 2022-02-18 | 厦门大学 | High-temperature-resistant modified diaphragm and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180504 |