CN102303008A - Coating process and device of lithium titanate material of lithium ion battery - Google Patents
Coating process and device of lithium titanate material of lithium ion battery Download PDFInfo
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- CN102303008A CN102303008A CN201110217707A CN201110217707A CN102303008A CN 102303008 A CN102303008 A CN 102303008A CN 201110217707 A CN201110217707 A CN 201110217707A CN 201110217707 A CN201110217707 A CN 201110217707A CN 102303008 A CN102303008 A CN 102303008A
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- lithium titanate
- ion battery
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Abstract
The invention discloses a coating process of a lithium titanate material of a lithium ion battery. The coating process comprises the following steps: firstly coating a substrate treating solution on a coating substrate, and then coating electrode slurry, wherein lithium titanate is used as a main active material of the electrode slurry. According to the coating process, the coating effect of the electrode slurry using the lithium titanate as the main active material on the coating substrate can be improved, therefore, the energy density of the lithium ion battery is increased. The invention also provides a device for realizing the coating process. The device is simple in operation, and can be popularized and applied to the lithium battery production industry.
Description
Technical field
The present invention relates to a kind of coating process and device thereof of lithium ion battery lithium titanate material.
Background technology
Lithium titanate anode material is the spinel structure superfines, has excellent cycle performance and good charge and discharge platform.Embed or deviate from the process at Li; Crystal formation does not change, and therefore Volume Changes is called as " zero strain material " less than 1%; Can avoid in the charge and discharge cycles owing to the flexible back and forth of electrode material causes structural damage, thus the cycle performance and the service life of improving electrode.Li
4Ti
5O
12Chemical diffusion coefficient ratio carbon negative pole material in the high one magnitude of diffusion coefficient, thereby make that this negative material can fast charging and discharging.
Lithium titanate material has the advantage that other lithium ion battery negative materials do not have, and has extraordinary market prospects and practical value.
But lithium titanate material proportion is less, and granularity is thinner, closes the slurry difficulties in dispersion, be difficult for bonding when particularly being coated with, so the lithium titanate coating is generally thinner, has seriously restricted the raising of the specific energy of lithium titanate battery.Lithium ion battery producer has proposition in slurry, to add oxalic acid, is coated with after stirring, and its principle is that method through handling slurry is to improve the coating effect of lithium titanate battery.The method of handling slurry needs reasonable dispersion effect, thereby if disperses with great difficulty not cause the generation of great amount of bubbles and slurry to damage influence coating effect.
Summary of the invention
The object of the present invention is to provide a kind of coating process of lithium ion battery lithium titanate material, this technology can make coated substrates electrode coated slurry under moistening situation, improves the coating effect, thereby the energy density of battery is provided.In addition, the present invention also provides a kind of device of realizing said coating process
The technical scheme that the present invention adopted is following:
A kind of coating process of lithium ion battery lithium titanate material, concrete steps are: elder generation's coated substrates treatment fluid on coated substrates is coated with electrode slurry again; Said electrode slurry is for being the electrode slurry of main active material with lithium titanate.
Preferably, said coated substrates is an aluminium foil.
Preferably, said matrix treatment fluid is an organic solvent.
Preferably, the coating thickness of electrode slurry is 100 ~ 120 g/m
2
Preferably, said matrix treatment fluid is at least a in ethanol, acetone, oxalic acid, the acetate.
A kind of device of realizing above-mentioned coating process comprises being coated with roller, is coated with roller the place ahead and is provided with treatment liquid coating device.
Preferably, said apparatus for coating is the adsorbent equipment of sprayer or adsorbable treatment fluid.
Preferably, said adsorbent equipment is processed by sponge.
Beneficial effect of the present invention is; Coated substrates is before the coating electrode slurry; Elder generation's coated substrates treatment fluid (like ethanol, acetone, acetate, oxalic acid etc.) on coated substrates; Slight corrosion treatment matrix; Can also remove dust, greasy dirt on the matrix; Making matrix before applying slurry, keep moisture state, is the coating effect of electrode slurry on coated substrates of main active material thereby improve with lithium titanate, reaches the purpose that improves the lithium ion battery energy density; Apparatus for coating of the present invention is simple to operate, can in the lithium battery manufacture, be applicable.
Description of drawings
Fig. 1 is the used adsorbent equipment sketch map of coating process of the present invention;
Fig. 2 is the discharge curve of the lithium ion battery for preparing of coating process according to the present invention.
The specific embodiment
A kind of coating process of lithium ion battery lithium titanate material, concrete steps are: elder generation's coated substrates treatment fluid on coated substrates is coated with electrode slurry again; Said electrode slurry is for being the electrode slurry of main active material with lithium titanate.
Preferably, said coated substrates is an aluminium foil.
Preferably, said matrix treatment fluid is an organic solvent.
Preferably, the coating thickness of electrode slurry is 100 ~ 120 g/m
2
Preferably, said matrix treatment fluid is at least a in ethanol, acetone, oxalic acid, the acetate.
A kind of device of realizing above-mentioned coating process comprises being coated with roller, is coated with roller the place ahead and is provided with treatment liquid coating device.
Preferably, said apparatus for coating is the adsorbent equipment of sprayer or adsorbable treatment fluid.
Preferably, said adsorbent equipment is processed by sponge.
The present invention is further illustrated according to embodiment below; Certainly; Among the following embodiment; This step of coated substrates treatment fluid on coated substrates; Except can be through allowing coated substrates through one section adsorbent equipment that is adsorbed with the matrix treatment fluid; Those skilled in the art can also realize through other means, as through sprayer spray treatment liquid etc. on coated substrates.Therefore, protection scope of the present invention and should not be limited to this.
Embodiment 1
Coated substrates adopts aluminium foil, and by the sponge device, this installs as shown in Figure 1 aluminium foil through elder generation before being coated with roller.Be adsorbed with oxalic acid solution on the sponge.Behind the sponge device, coated substrates is coated with closing the qualified lithium titanate slurry of slurry through being coated with roller, and coating thickness is coating layer thickness 105g/m
2Through detecting, be coated with respond wellly, pole piece does not have the dry linting phenomenon.
The resulting coating pole piece of contrast experiment's (being that coated substrates is not through the sponge device) has the dry linting phenomenon after the doubling.
Embodiment 2
Coated substrates adopts aluminium foil, and by the sponge device, this installs as shown in Figure 1 aluminium foil through elder generation before being coated with roller.Be adsorbed with oxalic acid solution on the sponge.Behind the sponge device, coated substrates is coated with closing the qualified lithium titanate slurry of slurry through being coated with roller, and coating thickness is coating layer thickness 120g/m
2Through detecting, be coated with respond wellly, pole piece does not have the dry linting phenomenon.
The resulting coating pole piece of contrast experiment's (being that coated substrates is not through the sponge device) has the dry linting phenomenon after the doubling.
Embodiment 3
Coated substrates adopts aluminium foil, and by the sponge device, this installs as shown in Figure 1 aluminium foil through elder generation before being coated with roller.Be adsorbed with acetic acid solution on the sponge.Behind the sponge device, coated substrates is coated with closing the qualified lithium titanate slurry of slurry through being coated with roller, and coating thickness is coating layer thickness 105g/m
2Through detecting, be coated with respond wellly, pole piece does not have the dry linting phenomenon.
The resulting coating pole piece of contrast experiment's (being that coated substrates is not through the sponge device) has the dry linting phenomenon after the doubling.
Embodiment 4
Coated substrates adopts aluminium foil, and by the sponge device, this installs as shown in Figure 1 aluminium foil through elder generation before being coated with roller.Be adsorbed with ethanolic solution on the sponge.Behind the sponge device, coated substrates is coated with closing the qualified lithium titanate slurry of slurry through being coated with roller, and coating thickness is coating layer thickness 105g/m
2Through detecting, be coated with respond wellly, pole piece does not have the dry linting phenomenon.
The resulting coating pole piece of contrast experiment's (being that coated substrates is not through the sponge device) has the dry linting phenomenon after the doubling.
Claims (8)
1. the coating process of a lithium ion battery lithium titanate material is characterized in that: coated substrates treatment fluid on coated substrates earlier is coated with electrode slurry again; Said electrode slurry is for being the electrode slurry of main active material with lithium titanate.
2. according to the coating process of the said a kind of lithium ion battery lithium titanate material of claim 1, it is characterized in that: said coated substrates is an aluminium foil.
3. according to the coating process of the said a kind of lithium ion battery lithium titanate material of claim 1, it is characterized in that: said matrix treatment fluid is an organic solvent.
4. according to the coating process of the said a kind of lithium ion battery lithium titanate material of claim 1, it is characterized in that: the coating thickness of electrode slurry is 100 ~ 120 g/m
2
5. according to the coating process of the said a kind of lithium ion battery lithium titanate material of claim 3, it is characterized in that: said matrix treatment fluid is at least a in ethanol, acetone, oxalic acid, the acetate.
6. a device of realizing the said coating process of claim 1 comprises being coated with roller, it is characterized in that: be coated with roller the place ahead and be provided with treatment liquid coating device.
7. device according to claim 6 is characterized in that: said apparatus for coating is the adsorbent equipment of sprayer or adsorbable treatment fluid.
8. device according to claim 7 is characterized in that: said adsorbent equipment is processed by sponge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110217707A CN102303008A (en) | 2011-08-01 | 2011-08-01 | Coating process and device of lithium titanate material of lithium ion battery |
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|---|---|---|---|
| CN201110217707A CN102303008A (en) | 2011-08-01 | 2011-08-01 | Coating process and device of lithium titanate material of lithium ion battery |
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| CN102303008A true CN102303008A (en) | 2012-01-04 |
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| CN201110217707A Pending CN102303008A (en) | 2011-08-01 | 2011-08-01 | Coating process and device of lithium titanate material of lithium ion battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107681149A (en) * | 2016-08-02 | 2018-02-09 | 万向二三股份公司 | A kind of fast charging type metatitanic acid lithium dynamical battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101174685A (en) * | 2007-10-26 | 2008-05-07 | 中南大学 | Anode or cathode pole piece of lithium ion battery and coating method thereof |
| CN101197439A (en) * | 2006-12-08 | 2008-06-11 | 深圳市比克电池有限公司 | Production method for positive plate of iron phosphate lithium battery |
| CN101685853A (en) * | 2008-09-23 | 2010-03-31 | 深圳市比克电池有限公司 | Lithium ion battery preparation method |
-
2011
- 2011-08-01 CN CN201110217707A patent/CN102303008A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101197439A (en) * | 2006-12-08 | 2008-06-11 | 深圳市比克电池有限公司 | Production method for positive plate of iron phosphate lithium battery |
| CN101174685A (en) * | 2007-10-26 | 2008-05-07 | 中南大学 | Anode or cathode pole piece of lithium ion battery and coating method thereof |
| CN101685853A (en) * | 2008-09-23 | 2010-03-31 | 深圳市比克电池有限公司 | Lithium ion battery preparation method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107681149A (en) * | 2016-08-02 | 2018-02-09 | 万向二三股份公司 | A kind of fast charging type metatitanic acid lithium dynamical battery |
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Owner name: ZHUHAI LITHIUM NEW ENERGY TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ZHUHAI LIYUAN POWER TECHNOLOGY CO., LTD. Effective date: 20120112 |
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Effective date of registration: 20120112 Address after: 519000 Guangdong Province, Zhuhai city Xiangzhou District Jida Waterfront Road No. 47 room 1206 Applicant after: Zhuhai Liyuan New Energy Technology Co., Ltd. Address before: 519015 Guangdong province Zhuhai Jida Waterfront Road No. 47 Everbright 1205 Applicant before: Zhuhai Liyuan Power Technology Co., Ltd. |
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