CN209626296U - A kind of novel lithium ion battery diaphragm - Google Patents
A kind of novel lithium ion battery diaphragm Download PDFInfo
- Publication number
- CN209626296U CN209626296U CN201920040793.8U CN201920040793U CN209626296U CN 209626296 U CN209626296 U CN 209626296U CN 201920040793 U CN201920040793 U CN 201920040793U CN 209626296 U CN209626296 U CN 209626296U
- Authority
- CN
- China
- Prior art keywords
- coating
- lithium ion
- ion battery
- diaphragm
- novel lithium
- 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.)
- Active
Links
Classifications
-
- 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
Landscapes
- Cell Separators (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses a kind of novel lithium ion battery diaphragms, including substrate diaphragm, the inside of the substrate diaphragm is equipped with multichannel cavernous structure, ceramic coating has been respectively coated in the upper surface and/or lower surface of the substrate diaphragm, pore-creating process, the multichannel microcellular structure being evenly distributed are passed through in the inside of the ceramic coating.The ceramic-coated separator that the utility model is prepared has higher porosity while increasing battery security, and such diaphragm can lay in more electrolyte, be more advantageous to battery, is more applicable for rate and power type battery.
Description
Technical field
The utility model relates to technical field of lithium batteries, more particularly to a kind of novel lithium ion battery diaphragm.
Background technique
Consumer battery product updates, and green energy resource power battery automobile has been seen everywhere, and energy saving energy storage project is
Rise to national strategy height.Lithium ion battery as the above instrument and equipment energy supply system in occupation of important position,
Therefore the performance requirements such as high security, long circulation life of lithium ion battery become lithium ion battery technology development when business
It is anxious.
Secondary lithium battery have passed through nearly development in 30 years, and energy density can accomplish that 700Wh/L is even higher,
But receive the limitation of material nature and process.After lithium ion battery energy density improves, its multiplying power is new
The performances such as energy, cycle life, high-temperature behavior and safety receive different degrees of inhibition.For current technology, lithium from
The charging voltage of sub- battery has accomplished that 4.45V, the isolation film of conventional polyethylene film composition not can avoid in lithium
It is oxidized in battery charge and discharge process.In industry most conventional way be exactly polyethylene film surface coat one layer of ceramics, or
Person is anti-oxidant stronger polymer adhesive.But due to the defect of pore-creating process aspect technology, lead to the coating worked it out
Diaphragm porosity is lower, is unfavorable for the migration of lithium ion in the storage and use process of electrolyte, and such diaphragm is often electrical
It can be poor.
Utility model content
In order to overcome the shortcomings of the prior art, the utility model provides a kind of novel lithium ion battery diaphragm,
Porosity is high, protects liquid measure height, overcomes the defect that porosity is low in conventional membrane coating technology.
The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of novel lithium ion battery diaphragm, packet
Substrate diaphragm is included, the inside of the substrate diaphragm is equipped with multichannel cavernous structure, the upper surface of the substrate diaphragm and/or following table
Ceramic coating has been respectively coated in face, and pore-creating process, the multichannel being evenly distributed are passed through in the inside of the ceramic coating
Microcellular structure.
Preferably, the multichannel microcellular structure is in hollow columnar.
Preferably, the porosity of the ceramic coating is not less than the porosity of the substrate diaphragm.
Preferably, the porosity of the ceramic coating is 40~60%.
Preferably, the porosity of the substrate diaphragm is 30~50%.
Preferably, the ceramic coating with a thickness of 3~12 μm.
Preferably, the ceramic coating be silica dioxide coating, aluminum oxide coating, zirconia coating,
Beryllium oxide coating, aluminium nitride coating, silicon nitride coating, coat of silicon carbide or vanadium trioxide coating.
Preferably, the substrate diaphragm with a thickness of 6~35 μm.
Preferably, the substrate diaphragm is polyolefin film, aramid fiber film or polyimide film.
Compared with prior art, the utility model has the beneficial effects that firstly, being made pottery by being smeared on the surface of substrate diaphragm
Porcelain coating, and microcellular structure is set inside ceramic coating so that ceramic coating is frame-shaped structure, and then allow ceramic particle it
Between keep good contact, heat conductivity is good, and the thermal contraction of coated separator is small, improves the resistance to thermal contraction of diaphragm to the greatest extent
Property, improve the safety of battery；Secondly, the diaphragm coating being prepared forms one layer of porous network structure, floating coat
Porosity obtained promotion at double, be effectively increased guarantor's liquid measure of battery, the service life of battery can be obviously improved；
Finally, due to which the design improves the porosity of diaphragm, the raffinate amount of battery is increased, therefore the design is for the low temperature of battery
Characteristic also has obvious promotion.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the schematic diagram of the utility model lithium ion battery separator.
Fig. 2 is another schematic diagram of the utility model lithium ion battery separator.
11- substrate diaphragm；12- ceramic coating；13- multichannel microcellular structure；14- multichannel cavernous structure.
Specific embodiment
The utility model is described in further detail presently in connection with attached drawing.These attached drawings are simplified schematic diagram,
Only illustrate the basic structure of the utility model in a schematic way, therefore it only shows composition related with the utility model.
Embodiment 1
Fig. 1, a kind of novel lithium ion battery diaphragm, including substrate diaphragm 11 are please referred to, the inside of substrate diaphragm 11 is equipped with
Multichannel cavernous structure 14, ceramic coating are coated in the upper surface lower surface of substrate diaphragm 11, and the inside of ceramic coating 12 is passed through
Pore-creating process, the multichannel microcellular structure 13 being evenly distributed, multichannel microcellular structure 13 are in hollow columnar, and ceramics apply
The porosity of layer 12 is not less than the porosity of substrate diaphragm 11, ceramic coating 12 with a thickness of 3~12 μm, porosity 40
~60%, substrate diaphragm 11 with a thickness of 6~35 μm, porosity is 30~50%, while ceramic coating 12 is silica
Coating, aluminum oxide coating, zirconia coating, beryllium oxide coating, aluminium nitride coating, silicon nitride coating, coat of silicon carbide
Or vanadium trioxide coating, substrate diaphragm 11 are polyolefin film, aramid fiber film or polyimide film.
In the present embodiment, the polyolefin film that substrate diaphragm 11 is, with a thickness of 6 μm, porosity 30%, and ceramics apply
Layer 12 is silica dioxide coating, with a thickness of 3 μm, porosity 40%, and by pore-creating process, the shape in ceramic coating 12
At can equally distributed multichannel microcellular structure 13, effectively increase the porosity of diaphragm, increase lithium ion battery protect liquid measure,
There is apparent help to battery cycle life and cryogenic property.
It is above-mentioned that pore-creating processing step is carried out to ceramic coating are as follows: step 1: the ceramic slurry for applying application is first prepared, wherein wrapping
Include deionized water, ceramic powder, binder, even phase agent, at raw materials such as macroporous additives；Step 2: prepared ceramic slurry is equal
It is even to be coated in barrier film base material surface；Step 3: the moisture in coating is dried by first of baking oven；Step 4: passing through second
Road baking oven will be such that it vapors away, and obtain the uniform poroid ceramic coating of band in coating at macroporous additive drying.
It is enlightenment, through the above description, related work people with the above-mentioned desirable embodiment according to the utility model
Member can carry out various changes and amendments in the range of without departing from this item utility model technical idea completely.This item is real
It is not limited to the contents of the specification with novel technical scope, it is necessary to its technology is determined according to scope of the claims
Property range.
Claims (9)
1. a kind of novel lithium ion battery diaphragm, it is characterised in that: including substrate diaphragm (11), the substrate diaphragm (11) it is interior
Portion is equipped with multichannel cavernous structure (14), and ceramic painting has been respectively coated in the upper surface and/or lower surface of the substrate diaphragm (11)
Pore-creating process, the multichannel microcellular structure being evenly distributed are passed through in the inside of layer (12), the ceramic coating (12)
(13).
2. novel lithium ion battery diaphragm according to claim 1, it is characterised in that: the multichannel microcellular structure (13)
In hollow columnar.
3. novel lithium ion battery diaphragm according to claim 1, it is characterised in that: the hole of the ceramic coating (12)
Rate is not less than the porosity of the substrate diaphragm (11).
4. novel lithium ion battery diaphragm according to claim 3, it is characterised in that: the hole of the ceramic coating (12)
Rate is 40~60%.
5. novel lithium ion battery diaphragm according to claim 3, it is characterised in that: the hole of the substrate diaphragm (11)
Rate is 30~50%.
6. novel lithium ion battery diaphragm according to claim 1, it is characterised in that: the thickness of the ceramic coating (12)
It is 3~12 μm.
7. novel lithium ion battery diaphragm according to claim 1, it is characterised in that: the ceramic coating (12) is dioxy
SiClx coating, aluminum oxide coating, zirconia coating, beryllium oxide coating, aluminium nitride coating, silicon nitride coating, silicon carbide
Coating or vanadium trioxide coating.
8. novel lithium ion battery diaphragm according to claim 1, it is characterised in that: the thickness of the substrate diaphragm (11)
It is 6~35 μm.
9. novel lithium ion battery diaphragm according to claim 1, it is characterised in that: the substrate diaphragm (11) is polyene
Hydrocarbon film, aramid fiber film or polyimide film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920040793.8U CN209626296U (en) | 2019-08-26 | 2019-08-26 | A kind of novel lithium ion battery diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920040793.8U CN209626296U (en) | 2019-08-26 | 2019-08-26 | A kind of novel lithium ion battery diaphragm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209626296U true CN209626296U (en) | 2019-11-12 |
Family
ID=68449449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920040793.8U Active CN209626296U (en) | 2019-08-26 | 2019-08-26 | A kind of novel lithium ion battery diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209626296U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113346193A (en) * | 2021-05-31 | 2021-09-03 | 湖北舰海新兴材料股份有限公司 | Composite isolation membrane and preparation method thereof |
-
2019
- 2019-08-26 CN CN201920040793.8U patent/CN209626296U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113346193A (en) * | 2021-05-31 | 2021-09-03 | 湖北舰海新兴材料股份有限公司 | Composite isolation membrane and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104064707B (en) | Inorganic/organic composite membrane, preparation method of inorganic/organic composite membrane and lithium ion secondary battery containing membrane | |
| JP2023080287A (en) | Nano-porous composite separator having enhanced heat conductivity | |
| JP6092389B2 (en) | Organic / inorganic composite coating porous separation membrane and secondary battery element using the same | |
| WO2022143210A1 (en) | Electrode piece and battery | |
| KR101198806B1 (en) | Electrode of secondary cell including por0us insulating layer and manufacturing thereof | |
| CN106654119A (en) | Mixed coating diaphragm and preparation method and application thereof | |
| CN206505967U (en) | A kind of barrier film and lithium ion battery for lithium ion battery | |
| CN108034318A (en) | A kind of low moisture lithium ion battery separator | |
| CN105489819A (en) | Lithium ion battery ceramic diaphragm paste | |
| CN109037555A (en) | Lithium ion battery isolation film and preparation method thereof | |
| CN103408975A (en) | Coating material for lithium ion battery diaphragm | |
| CN110429281A (en) | A kind of high-energy density all-solid-state battery based on sulfide solid electrolyte | |
| WO2022057666A1 (en) | Positive electrode sheet and battery | |
| WO2020134763A1 (en) | Method for preparing battery separator with high ion conductivity and lithium ion battery containing same | |
| CN109817872A (en) | A kind of non-all standing coated separator and preparation method thereof and device | |
| CN106784628A (en) | A kind of electrode comprising transfer type solid electrolyte thin layer and its preparation technology, application | |
| CN109860477A (en) | A kind of composite diaphragm and preparation method thereof with highly heat-conductive material layer | |
| CN105576173A (en) | Preparation method and application of ceramic coating material | |
| CN209626296U (en) | A kind of novel lithium ion battery diaphragm | |
| CN112952294A (en) | Lithium battery diaphragm based on electrophoretic coating ceramic particles and preparation method thereof | |
| CN107706341A (en) | A kind of preparation technology of composite diaphragm | |
| KR102238664B1 (en) | 2-dimensional coating material compositions including graphene and method of making secondary battery separators employing the same | |
| CN111900315A (en) | Ceramic diaphragm with double-sided coating material coating and preparation method and application thereof | |
| CN207938697U (en) | A kind of ceramic diaphragm with colour code coating | |
| CN207474559U (en) | A kind of lithium ion battery separator with high-liquid absorbing rate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |