CN103059613A - Lithium ion battery safe coating and preparation method thereof - Google Patents
Lithium ion battery safe coating and preparation method thereof Download PDFInfo
- Publication number
- CN103059613A CN103059613A CN2012105858240A CN201210585824A CN103059613A CN 103059613 A CN103059613 A CN 103059613A CN 2012105858240 A CN2012105858240 A CN 2012105858240A CN 201210585824 A CN201210585824 A CN 201210585824A CN 103059613 A CN103059613 A CN 103059613A
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- China
- Prior art keywords
- lithium ion
- ion battery
- battery safety
- safety coatings
- hydroxide
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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 discloses a lithium ion battery safe coating which is made of one or more of alkali hydroxide, alkali carbonate and alkali bicarbonate; and the chemical general formula of the lithium ion battery safe coating is shown as MX(OH)y, MX(CO3)y and MX(HCO3)y, wherein M refers to alkali metal. The lithium ion battery safe coating has the functions of thermal decomposition by heating and heat absorption, crystal structure change or pulverization, or release of water and carbon dioxide, can reduce the battery temperature and stop the charging/discharging under the condition that the battery is overheated, reduces the short circuit or current under the overcharge state, improves the safety of the battery, and has important practical significance.
Description
Technical field
The present invention relates to lithium ion battery, particularly relate to a kind of lithium ion battery safety coatings and preparation method thereof.
Background technology
Along with lithium ion battery at consumer electronics, electric bicycle, electromobile, that the widespread use in energy storage field, the security of lithium ion battery are subject to is more, pay attention to widely.In order to promote the security of lithium ion battery, most study is exactly safety coatings at present, namely at the positive pole of battery, negative pole or membrane surface apply one deck insulant, for example zirconium white, aluminum oxide, silicon oxide, titanium oxide, silicon nitride, boron nitride, aluminium nitride, wherein aluminum oxide is most widely used.
Prior art can reduce the internal short-circuit of battery effectively, but can't solve battery big area internal short-circuit, the situation of overcharge the blast out of control of the final heat of the battery that causes, catching fire.
Summary of the invention
In view of this, the objective of the invention is to overcome problems of the prior art, a kind of lithium ion battery safety coatings and preparation method thereof is provided, more effectively improve the safety performance of battery under extreme case.
For this reason, the invention provides a kind of lithium ion battery safety coatings, the material that described lithium ion battery safety coatings is used is one or more the mixing in alkali metal hydroxide, alkaline carbonate, the alkali metal hydrocarbonate, and chemical general formula is M
X(OH)
y, M
X(CO
3)
y, M
X(HCO
3)
y, M is basic metal.
Preferably, the material that described lithium ion battery safety coatings is used is aluminium hydroxide, calcium hydroxide, zirconium hydroxide, titanium hydroxide, aluminum oxyhydroxide, magnesium hydroxide, calcium carbonate, magnesiumcarbonate, Calcium hydrogen carbonate, the mixing of one or several in the Magnesium hydrogen carbonate.
A kind of method for preparing described lithium ion battery safety coatings, with described lithium ion battery safety coatings material 10%-40%(weight ratio), solvent 50%-90%(weight ratio), binding agent 0.01%-0.1%(weight ratio) mix, use high speed dispersor or ball mill to mix, viscosity is in the 100mPa.s-1500mPa.s scope; Use that the mode of roller coat, intaglio printing or spraying is coated in anodal pros and cons after rolling, on the negative pole pros and cons after rolling, barrier film single face; Then cross baking oven solvent is dried, pole piece or the barrier film of coating assembled, be made into battery.
Preferably, described solvent is a kind of in water, NMP, the acetone.
Preferably, described binding agent is SBR, acrylate, Resins, epoxy, urethane, PVDF(poly(vinylidene fluoride)) in one or several mixing.
Preferably, the weight ratio of described solvent is 65%.
Preferably, the thickness of described single face coating is 2 μ m-20 μ m.
By above technical scheme provided by the invention as seen, the present invention has following technique effect:
Lithium ion battery safety coatings provided by the invention adopts alkali metal hydroxide, alkaline carbonate and alkali metal hydrocarbonate, coated material also has the function of decomposes heat absorption, changes in crystal structure or efflorescence and release water outlet or carbonic acid gas except having the high temperature insulation effect.
(1) function of decomposes heat absorption can reduce the effect of battery temperature under the overheated state of battery.
(2) variation of crystalline structure can be blocked the minimizing ionic channel, stops the carrying out that discharges and recharges in the overheated situation of battery, the electric current when reducing short circuit or overcharging state, the security that improves battery.
(3) discharge water outlet and carbonic acid gas battery is expanded under superheat state, the internal resistance polarization increases, the electric current when reducing short circuit or overcharging state.
(4) application cost of the present invention is low than prior art.
Embodiment
In order to make those skilled in the art person understand better the present invention program, below the present invention is described in further detail:
The invention provides a kind of lithium ion battery safety coatings, the material that described lithium ion battery safety coatings is used is one or more the mixing in alkali metal hydroxide, alkaline carbonate, the alkali metal hydrocarbonate, and chemical general formula is M
X(OH)
y, M
X(CO
3)
y, M
X(HCO
3)
y, M is basic metal.
Preferably, the material that described lithium ion battery safety coatings is used is aluminium hydroxide, calcium hydroxide, zirconium hydroxide, titanium hydroxide, aluminum oxyhydroxide, magnesium hydroxide, calcium carbonate, magnesiumcarbonate, Calcium hydrogen carbonate, the mixing of one or several in the Magnesium hydrogen carbonate.
A kind of method for preparing described lithium ion battery safety coatings, with described lithium ion battery safety coatings material 10%-40%(weight ratio), solvent 50%-90%(weight ratio), binding agent 0.01%-0.1%(weight ratio) mix, use high speed dispersor or ball mill to mix, viscosity is in the 100mPa.s-1500mPa.s scope; Use that the mode of roller coat, intaglio printing or spraying is coated in anodal pros and cons after rolling, on the negative pole pros and cons after rolling, barrier film single face; Then cross baking oven solvent is dried, pole piece or the barrier film of coating assembled, be made into battery.
Preferably, described solvent is a kind of in water, NMP, the acetone.
Preferably, described binding agent is SBR, acrylate, Resins, epoxy, urethane, PVDF(poly(vinylidene fluoride)) in one or several mixing.
Preferably, the weight ratio of described solvent is 65%.
Preferably, the thickness of described single face coating is 2 μ m-20 μ m.
The below will describe the present invention in more detail by embodiment:
Embodiment 1
The positive pole that the present invention uses comprises positive electrode active materials nickle cobalt lithium manganate 94%(weight ratio), conductive agent 2%(weight ratio), binding agent 4%(weight ratio); Negative pole comprises negative active core-shell material synthetic graphite 96%(weight ratio), conductive agent 2%(weight ratio), binding agent 2%(weight ratio); Barrier film uses three layers of PP/PE/PP barrier film, and thickness is 20 μ m.
Cell container 5.2Ah, the electrolytic solution lithium salts is LiPF
6, concentration 1mol/L, electrolyte solvent are NSC 11801 (EC): diethyl carbonate (DEC): Methyl ethyl carbonate (EMC)=1:1:1.
With aluminum oxyhydroxide (AlOOH) 34.98% (weight ratio), NMP65%(weight ratio), the PVDF0.02%(weight ratio) mix, use high speed dispersor or ball mill to mix, viscosity is in the 100mPa.s-1500mPa.s scope; The mode of use roller coat, intaglio printing or spraying is coated in the negative pole pros and cons after rolling, and the single face applied thickness is 10 μ m; Then cross baking oven solvent is dried, pole piece or the barrier film of coating assembled, be made into battery.
Comparative Examples 1
Aluminum oxyhydroxide among the embodiment 1 (AlOOH) is changed into aluminum oxide, and the single face coating thickness is 10 μ m, and all the other are with embodiment 1.
Battery in battery among the embodiment 1 and the Comparative Examples 1 is done respectively the safety test shown in the following table, 5 batteries are surveyed in every kind of test, contrast the test result of two class batteries and the top temperature of battery, until test finishes not occur smoldering, catch fire, explosion phenomenon is for passing through test.
By relatively finding out, adopt the battery of lithium ion battery safety coatings provided by the invention, safety test result's percent of pass is high, and the top temperature of test is low, illustrates that the technology of the present invention has obvious superiority than prior art.
Claims (7)
1. lithium ion battery safety coatings is characterized in that: the material that described lithium ion battery safety coatings is used is one or more the mixing in alkali metal hydroxide, alkaline carbonate, the alkali metal hydrocarbonate, and chemical general formula is M
X(OH)
y, M
X(CO
3)
y, M
X(HCO
3)
y, M is basic metal.
2. lithium ion battery safety coatings according to claim 1, it is characterized in that: the material that described lithium ion battery safety coatings is used is aluminium hydroxide, calcium hydroxide, zirconium hydroxide, titanium hydroxide, aluminum oxyhydroxide, magnesium hydroxide, calcium carbonate, magnesiumcarbonate, Calcium hydrogen carbonate, the mixing of one or several in the Magnesium hydrogen carbonate.
3. method for preparing the described lithium ion battery safety coatings of claim 1-2 any one, it is characterized in that: with the described lithium ion battery safety coatings of claim 1-2 any one material 10%-40%(weight ratio), solvent 50%-90%(weight ratio), binding agent 0.01%-0.1%(weight ratio) mix, use high speed dispersor or ball mill to mix, viscosity is in the 100mPa.s-1500mPa.s scope; Use that the mode of roller coat, intaglio printing or spraying is coated in anodal pros and cons after rolling, on the negative pole pros and cons after rolling, barrier film single face; Then cross baking oven solvent is dried, pole piece or the barrier film of coating assembled, be made into battery.
4. the method for preparing the lithium ion battery safety coatings according to claim 3 is characterized in that: described solvent is a kind of in water, NMP, the acetone.
5. the method for preparing the lithium ion battery safety coatings according to claim 3, it is characterized in that: described binding agent is SBR, acrylate, Resins, epoxy, urethane, PVDF(poly(vinylidene fluoride)) in one or several mixing.
6. the method for preparing the lithium ion battery safety coatings according to claim 3, it is characterized in that: the weight ratio of described solvent is 65%.
7. the method for preparing the lithium ion battery safety coatings according to claim 3, it is characterized in that: the thickness of described single face coating is 2 μ m-20 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105858240A CN103059613A (en) | 2012-12-31 | 2012-12-31 | Lithium ion battery safe coating and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105858240A CN103059613A (en) | 2012-12-31 | 2012-12-31 | Lithium ion battery safe coating and preparation method thereof |
Publications (1)
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| CN103059613A true CN103059613A (en) | 2013-04-24 |
Family
ID=48102526
Family Applications (1)
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|---|---|---|---|
| CN2012105858240A Pending CN103059613A (en) | 2012-12-31 | 2012-12-31 | Lithium ion battery safe coating and preparation method thereof |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105131689A (en) * | 2015-09-14 | 2015-12-09 | 中航锂电（洛阳）有限公司 | Preparation method of insulating paint of lithium ion battery |
| CN105733332A (en) * | 2016-03-01 | 2016-07-06 | 天津市捷威动力工业有限公司 | Flame-retardant coating and lithium ion battery employing same |
| CN105895923A (en) * | 2016-05-18 | 2016-08-24 | 河南田园新能源科技有限公司 | Preparation method of primer used for coating cathode piece of copper foil current collector |
| CN105958135A (en) * | 2016-06-20 | 2016-09-21 | 宁德时代新能源科技股份有限公司 | Secondary battery |
| WO2016179785A1 (en) * | 2015-05-11 | 2016-11-17 | 宁德时代新能源科技股份有限公司 | Composite diaphragm and lithium ion battery using same |
| CN106601991A (en) * | 2016-12-30 | 2017-04-26 | 先雪峰 | Application of additive, electrode slurry, additive slurry, lithium ion battery positive electrode or negative electrode and preparation method therefor, and lithium ion battery |
| CN106654124A (en) * | 2017-01-20 | 2017-05-10 | 东莞市卓高电子科技有限公司 | Method for preparing heat-resistant lithium battery separator |
| CN106654277A (en) * | 2016-11-29 | 2017-05-10 | 先雪峰 | Application of additive, electrode slurry, additive slurry, cathode or anode of lithium ion battery, preparation method of cathode or anode of lithium ion battery and lithium ion battery |
| CN106684296A (en) * | 2016-08-26 | 2017-05-17 | 宁德卓高新材料科技有限公司 | PVDF (polyvinylidene fluoride) mixed coating diaphragm with good safety and preparation method thereof |
| CN106784526A (en) * | 2016-12-21 | 2017-05-31 | 浙江南都电源动力股份有限公司 | A kind of ceramic coating membrane as lithium ion battery and preparation method thereof |
| US9711774B2 (en) | 2014-12-03 | 2017-07-18 | Nano And Advanced Materials Institute Limited | Lithium ion battery with thermal sensitive layer |
| CN108649182A (en) * | 2018-05-11 | 2018-10-12 | 江西中汽瑞华新能源科技有限公司 | A kind of high security lithium ion battery |
| CN109659470A (en) * | 2018-11-30 | 2019-04-19 | 欣旺达电子股份有限公司 | A kind of preparation method of ceramic diaphragm, ceramic diaphragm and dynamic lithium battery |
| CN112029315A (en) * | 2020-08-20 | 2020-12-04 | 苏州合睿新能源科技有限公司 | Insulating coating material for positive pole piece of lithium battery |
| CN113097434A (en) * | 2021-03-30 | 2021-07-09 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| CN114583385A (en) * | 2022-03-02 | 2022-06-03 | 上海兰钧新能源科技有限公司 | Lithium battery composite safety diaphragm, lithium battery cell and corresponding preparation method |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9711774B2 (en) | 2014-12-03 | 2017-07-18 | Nano And Advanced Materials Institute Limited | Lithium ion battery with thermal sensitive layer |
| WO2016179785A1 (en) * | 2015-05-11 | 2016-11-17 | 宁德时代新能源科技股份有限公司 | Composite diaphragm and lithium ion battery using same |
| CN105131689B (en) * | 2015-09-14 | 2017-03-29 | 中航锂电（洛阳）有限公司 | A kind of preparation method of lithium ion battery coatings |
| CN105131689A (en) * | 2015-09-14 | 2015-12-09 | 中航锂电（洛阳）有限公司 | Preparation method of insulating paint of lithium ion battery |
| CN105733332A (en) * | 2016-03-01 | 2016-07-06 | 天津市捷威动力工业有限公司 | Flame-retardant coating and lithium ion battery employing same |
| CN105895923A (en) * | 2016-05-18 | 2016-08-24 | 河南田园新能源科技有限公司 | Preparation method of primer used for coating cathode piece of copper foil current collector |
| CN105958135A (en) * | 2016-06-20 | 2016-09-21 | 宁德时代新能源科技股份有限公司 | Secondary battery |
| CN106684296A (en) * | 2016-08-26 | 2017-05-17 | 宁德卓高新材料科技有限公司 | PVDF (polyvinylidene fluoride) mixed coating diaphragm with good safety and preparation method thereof |
| CN106654277A (en) * | 2016-11-29 | 2017-05-10 | 先雪峰 | Application of additive, electrode slurry, additive slurry, cathode or anode of lithium ion battery, preparation method of cathode or anode of lithium ion battery and lithium ion battery |
| CN106784526A (en) * | 2016-12-21 | 2017-05-31 | 浙江南都电源动力股份有限公司 | A kind of ceramic coating membrane as lithium ion battery and preparation method thereof |
| CN106784526B (en) * | 2016-12-21 | 2019-08-09 | 浙江南都电源动力股份有限公司 | A kind of ceramic coating membrane and preparation method thereof as lithium ion battery |
| CN106601991A (en) * | 2016-12-30 | 2017-04-26 | 先雪峰 | Application of additive, electrode slurry, additive slurry, lithium ion battery positive electrode or negative electrode and preparation method therefor, and lithium ion battery |
| CN106654124A (en) * | 2017-01-20 | 2017-05-10 | 东莞市卓高电子科技有限公司 | Method for preparing heat-resistant lithium battery separator |
| CN108649182A (en) * | 2018-05-11 | 2018-10-12 | 江西中汽瑞华新能源科技有限公司 | A kind of high security lithium ion battery |
| CN109659470A (en) * | 2018-11-30 | 2019-04-19 | 欣旺达电子股份有限公司 | A kind of preparation method of ceramic diaphragm, ceramic diaphragm and dynamic lithium battery |
| CN112029315A (en) * | 2020-08-20 | 2020-12-04 | 苏州合睿新能源科技有限公司 | Insulating coating material for positive pole piece of lithium battery |
| CN113097434A (en) * | 2021-03-30 | 2021-07-09 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| CN114824642A (en) * | 2021-03-30 | 2022-07-29 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| CN114824642B (en) * | 2021-03-30 | 2024-03-12 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| CN114583385A (en) * | 2022-03-02 | 2022-06-03 | 上海兰钧新能源科技有限公司 | Lithium battery composite safety diaphragm, lithium battery cell and corresponding preparation method |
| CN114583385B (en) * | 2022-03-02 | 2024-03-15 | 上海兰钧新能源科技有限公司 | Lithium battery composite safety diaphragm, lithium battery cell and corresponding preparation method |
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Inventor after: Wang Chiwei Inventor after: Wang Yong Inventor after: Gao Xiuling Inventor after: Liu Jing Inventor before: Wang Yong Inventor before: Gao Xiuling Inventor before: Liu Jing |
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Free format text: CORRECT: INVENTOR; FROM: WANG YONG GAO XIULING LIU JING TO: WANG CHIWEI WANG YONG GAO XIULING LIU JING |
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Application publication date: 20130424 |