CN103117382A - Lithium ion battery negative pole material capable of improving safety performance and preparation method thereof - Google Patents
Lithium ion battery negative pole material capable of improving safety performance and preparation method thereof Download PDFInfo
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- CN103117382A CN103117382A CN2013100585114A CN201310058511A CN103117382A CN 103117382 A CN103117382 A CN 103117382A CN 2013100585114 A CN2013100585114 A CN 2013100585114A CN 201310058511 A CN201310058511 A CN 201310058511A CN 103117382 A CN103117382 A CN 103117382A
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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
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- 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 relates to a lithium ion battery negative pole material capable of improving the safety performance and a preparation method of the lithium ion battery negative pole material. The method comprises the following steps of: (1) slurry configuration, (2) coating, and (3) roasting and drying. According to the invention, as a negative pole tab is coated with a lithium metaaluminate film, which not only has a good electronic insulation effect, but also can effectively obstruct battery short circuit after a battery diaphragm PP (Polypropylene) or PE (polyethylene) is punctured, and at the same time the lithium metaaluminate has good ionic conductivity, thus increasing the transmission velocity of the lithium ion battery, and reducing the probability that dendritic crystal generated by lithium separation of the lithium ion battery pierces the diaphragm. The composite negative pole tab prepared by the method plays a very important role in improving high-capacity lithium ion batteries.
Description
The invention belongs to technical field of electrochemistry, be specifically related to a kind of method of lithium ion battery safety performance and prepared lithium ion battery thereof of improving.
Background technology
Ferric phosphate lithium cell is a kind of novel energy-storing element that grew up in recent years, and, environmental protection cheap with it, has extended cycle life and be subject to the favor in market.While is along with the continuous increase of energy content of battery density, the thermal stability of battery worse and worse, and along with the battery door event of the companies such as Sony, everything constantly occurs, in the high-energy-density that guarantees lithium ion battery, guarantee that again the safety and stability performance of battery becomes a major challenge of industry.And being mainly thermal runaway due to lithium ion battery, the security and stability of battery cause battery short circuit to cause that battery catches fire, explodes and cause.The fail safe that improves at present battery is mainly to pass through the following aspects: optimize electrolyte prescription, adopt ceramic diaphragm, the lithium ion positive and negative pole material of fail safe is provided; But these methods are limited to the security performance that improves battery.
Summary of the invention
Deficiency for existing lithium ion battery, the object of the present invention is to provide a kind of lithium ion battery that improves security performance and preparation method thereof, at the certain thickness lithium metaaluminate slurry of cathode pole piece surface-coated by spraying process, obtain containing the cathode pole piece of lithium metaaluminate by techniques such as drying, bakings, prepare at last the high security lithium ion battery.
Technical scheme of the present invention is achieved in the following ways: a kind of lithium ion battery cathode material and its preparation method that can improve security performance comprises the following steps; 1) slurry configuration, 2) coating, 3) baking is dry; It is characterized in that:
1), slurry configuration: get lithium metaaluminate: the LA132 binding agent: the CMC binding agent: conductive agent=100～50: 10～1: 5～1: 1 ratio, being configured to concentration with redistilled water is 1% ~ 40% lithium metaaluminate slurry;
The chemical formula of described lithium metaaluminate is LiAIO
2, LA132 binding agent, CMC binding agent chemistry sodium carboxymethylcellulose by name, conductive agent is Super-P.
The pore size of described lithium metaaluminate is 0. 05～0. 15 μ m, and porosity is 40～50%.
2), coating: above-mentioned slurry is adopted the cathode pole piece surface-coated of ultrasonic spraying process after roll-in, and its coating thickness is (1～10) μ m;
The spraying frequency of described ultrasonic spraying process is 1KHz ~ 1MHz.
3), baking is dry: be dry the baking 0.5～2 hour under 40～80 ℃ of conditions with the cathode pole piece after above-mentioned surface-coated in temperature, obtain the cathode pole piece that the lithium metaaluminate film is contained on the surface.
The present invention; the pore size of lithium metaaluminate and porosity can guarantee good lithium ion penetrability; by anticathode pole piece surface filming; make that negative electrode active material-graphite is unlikely to structural collapse in cyclic process; and be conducive to the stable of negative terminal surface SEI film; negative pole has obtained effective protection in the process that circulates, improved fail safe and the cycle performance of lithium ion battery.Utilize simultaneously lithium ion battery LiAlO in charge and discharge process
2The characteristic of ionic conductivity improved the conduction velocity of lithium ion battery, reduced lithium ion battery and analysed the probability that dendrite that lithium produces punctures barrier film, improves the security performance of battery; Utilized again LiAlO
2Heat-resisting, high temperature resistant, the characteristic of insulation makes it prevent that in the cell reaction process, battery temperature is too high, and some the thermal runaway point expansion formation overall thermal that reduces in battery is out of control, reduces the battery short circuit probability.
Description of drawings
Fig. 1 is the multiplying power discharging figure that the material of embodiment 1 preparation is assembled into battery A.
Fig. 2 is the multiplying power discharging figure that the material of prior art preparation is assembled into battery B.
Embodiment
The embodiment of the present invention provides a kind of method of lithium ion battery safety performance and prepared lithium ion battery thereof of improving, when being intended to solve the non-normal use lithium rechargeable battery, easily cause internal short-circuit of battery and the problem on fire that sets off an explosion, for this reason, the method for embodiment of the present invention employing is: adopt the cathode pole piece surface-coated one deck LiAlO of spraying process after roll-in
2Material is prepared the composite negative pole pole piece, and as the cathode pole piece of lithium ion battery, prepares ferric phosphate lithium cell.
Embodiment 1:
After the cathode pole piece roll-in, adopt ultrasonic spraying process to apply one deck LiAlO in its negative terminal surface
2Film; Its step is as follows: 1) slurry configuration takes 100 gram LiAlO
2, 10 gram LA132 binding agents, 2 gram CMC binding agents, 1 gram SP conductive agent, 640 gram redistilled waters are configured to the lithium metaaluminate slurry of 15% concentration; 2) coating: adopting ultrasonic spraying process (its device frequency is 500KHz) at cathode pole piece surface-coated lithium metaaluminate material in its above-mentioned slurry, is to toast 1 hour under 50 ℃ of conditions in temperature afterwards, and drying obtains the LiAlO that surface-coated thickness is 2 μ m at last
2The cathode pole piece of film.The chemistry of LA132 binding agent, CMC binding agent is called sodium carboxymethylcellulose, and conductive agent is Super-P.
Embodiment 2:
The lithium ion battery production technology that the present embodiment provides is identical with the production technology that this area is commonly used, and difference is: after the cathode pole piece roll-in, adopt ultrasonic spraying process to apply one deck LiAlO in its negative terminal surface
2Film; 1) slurry configuration takes 100 gram LiAlO
2, 5 gram LA132 binding agents, 2 gram CMC binding agents, 1 gram SP conductive agent, 2052 gram redistilled waters are configured to the lithium metaaluminate slurry of 5% concentration; 2) coating: adopting ultrasonic spraying process (its device frequency is 1MHz) at cathode pole piece surface-coated lithium metaaluminate material in its above-mentioned slurry, is to toast 2 hours under 40 ℃ of conditions in temperature afterwards, and drying obtains the LiAlO that surface-coated thickness is 1 μ m at last
2The cathode pole piece of film.
Embodiment 3:
After the cathode pole piece roll-in, adopt ultrasonic spraying process to apply one deck LiAlO2 film in its negative terminal surface; Its process is as follows: 1) slurry configuration takes 50 gram LiAlO
2, 10 gram LA132 binding agents, 1 gram CMC, 1 gram SP conductive agent, 93 gram redistilled waters are configured to the lithium metaaluminate slurry of 40% concentration; 2) coating: adopting ultrasonic spraying process (its device frequency is 1MHz) at cathode pole piece surface-coated lithium metaaluminate material in its above-mentioned slurry, is to toast 2h under 80 ℃ of conditions in temperature afterwards, and drying obtains the LiAlO that surface-coated thickness is 10 μ m at last
2The cathode pole piece of film.
Electrochemical property test
Being known by Fig. 1, is the multiplying power discharging curve chart of embodiment 1 battery.Take LiFePO4 as positive electrode, take the composite negative pole material of embodiment 1 preparation as battery cathode, with LiPF
6/ EC+DEC(volume ratio 1: 1) be electrolyte, Celgard 2400 films are barrier film, prepare 5AH soft-package battery A.Test afterwards the voltage of its material under different multiplying-capacity discharge curve.
Being known by Fig. 2, is the multiplying power discharging curve chart battery as a comparison of Comparative Examples battery.Take LiFePO4 as positive electrode, take Delanium as negative material, adopt LiPF
6/ EC+DEC(volume ratio 1: 1) be electrolyte, Celgard 2400 films are barrier film, prepare 5AH soft-package battery B.Test afterwards the voltage of its material under different multiplying-capacity discharge curve.
Under equal conditions test the DC internal resistance of its battery A and battery B, battery A DC internal resistance is 4.18m Ω, and the DC internal resistance of battery B is 5.31 m Ω, so the DC internal resistance of battery A is less than the DC internal resistance of battery B;
The high rate performance of test battery A and battery B under equal conditions, battery is under the 8.0C condition, and the capability retention of battery A is 95.2%, and the capability retention of battery B is 91.0%
And choose at random 10 5AH soft-package battery A and 10 5AH soft-package battery B, to 10 battery A, 10 battery B, carry out the acupuncture short circuit experiment: result shows respectively, in 10 battery A acupuncture experiments, the acupuncture short circuit is caught fire 1, and in 10 battery B acupunctures experiment, the acupuncture short circuit is caught fire 4.Therefore the security performance of battery A is better than the security performance of battery B.
The present invention had both guaranteed battery under the thermal runaway state, relied on LiAlO
2The insulating barrier that film is good has played the effect of double-deck barrier film, after PP or PE barrier film are pierced in battery, and LiAlO
2Film can prevent internal short-circuit of battery effectively, particularly when PP or PE barrier film part are pierced, and LiAlO
2Insulating effect more obvious, make the rapid diffusion of its battery heat, reduce the thawing probability of barrier film, thereby reduce the short circuit probability of battery; While LiAlO
2Have again better ionic conductivity, make its battery in use the resistance of battery do not increase, thereby improve heat dispersion and the high rate performance of battery, prevent battery in acupuncture, fall etc. under exceedingly odious condition on fire, blast that battery occurs.
Claims (4)
1. the lithium ion battery cathode material and its preparation method that can improve security performance, comprise the following steps; 1) slurry configuration, 2) coating, 3) baking is dry; It is characterized in that:
1), slurry configuration: get lithium metaaluminate: the LA132 binding agent: the CMC binding agent: conductive agent=100～50: 10～1: 5～1: 1 ratio, being configured to concentration with redistilled water is 1% ~ 40% lithium metaaluminate slurry;
2), coating: above-mentioned slurry is adopted the cathode pole piece surface-coated of ultrasonic spraying process after roll-in, and its coating thickness is 1～10 μ m;
3), baking is dry: be under 40～80 ℃ of conditions with the cathode pole piece after above-mentioned surface-coated in temperature, toasted 0.5～2 hour, drying obtains the cathode pole piece that the lithium metaaluminate film is contained on the surface.
2. a kind of lithium ion battery cathode material and its preparation method that can improve security performance according to claim 1, it is characterized in that: the chemical molecular formula of the lithium metaaluminate in described step 1) is LiAIO
2, LA132 binding agent, CMC binding agent chemistry sodium carboxymethylcellulose by name, conductive agent is Super-P.
3. a kind of lithium ion battery cathode material and its preparation method that can improve security performance according to claim 1, it is characterized in that: the pore size of the lithium metaaluminate in described step 1) is 0. 05～0. 15 μ m, and porosity is 40～50%.
4. a kind of lithium ion battery cathode material and its preparation method that can improve security performance according to claim 1, it is characterized in that: the spraying frequency of the ultrasonic spraying process described step 2) is 1KHz ~ 1MHz.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332588A (en) * | 2014-08-21 | 2015-02-04 | 中航锂电（洛阳）有限公司 | High safety lithium ion battery negative electrode plate, preparation method and applications thereof |
| CN105226234A (en) * | 2015-09-01 | 2016-01-06 | 中航锂电（洛阳）有限公司 | Lithium battery anode composite sheet, lithium battery composite negative plate and preparation method thereof, lithium battery |
| CN105591070A (en) * | 2016-03-16 | 2016-05-18 | 江苏乐能电池股份有限公司 | Method for preparing high-energy-density negative pole piece and lithium ion battery comprising same |
| CN105633340A (en) * | 2015-12-17 | 2016-06-01 | 佛山市南海区欣源电子有限公司 | Composite pole plate of lithium ion battery and preparation method of composite pole plate |
| CN106099041A (en) * | 2016-08-26 | 2016-11-09 | 深圳博磊达新能源科技有限公司 | A kind of lithium titanate composite negative pole pole piece and lithium titanate battery |
| CN106129315A (en) * | 2016-08-19 | 2016-11-16 | 洛阳力容新能源科技有限公司 | A kind of lithium ion battery composite separation membrane and preparation method thereof, lithium ion battery |
| CN106159201A (en) * | 2016-07-28 | 2016-11-23 | 深圳博磊达新能源科技有限公司 | A kind of lithium ion battery lithium composite sheet and preparation method thereof, lithium ion battery |
| CN106159236A (en) * | 2016-08-26 | 2016-11-23 | 深圳博磊达新能源科技有限公司 | A kind of quick charge lithium titanate composite negative pole pole piece and lithium ion battery |
| CN106229447A (en) * | 2016-08-10 | 2016-12-14 | 东莞永蓝电子科技有限公司 | A kind of lithium ion battery |
| CN106252598A (en) * | 2016-08-29 | 2016-12-21 | 深圳博磊达新能源科技有限公司 | A kind of high power capacity, high security lithium ion battery cathode composite pole piece and preparation method thereof, lithium ion battery |
| CN106252626A (en) * | 2016-08-26 | 2016-12-21 | 深圳博磊达新能源科技有限公司 | The tool lithium titanate electrode material of nucleocapsid structure, preparation method and application |
| CN106450166A (en) * | 2016-11-10 | 2017-02-22 | 厦门日臻动力电源科技有限公司 | Preparation method of lithium ion battery negative electrode composite pole piece |
| CN106486651A (en) * | 2015-09-29 | 2017-03-08 | 上海杉杉科技有限公司 | A kind of lithium ion battery negative material of high safety performance and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1937285A (en) * | 2005-09-23 | 2007-03-28 | 中国科学院物理研究所 | Method for preparing lithium secondary cell electrode containing nano additive |
| CN101685883A (en) * | 2008-09-23 | 2010-03-31 | 深圳市比克电池有限公司 | Polymer lithium ion battery and preparation method thereof |
| CN102280656A (en) * | 2011-07-04 | 2011-12-14 | 南陵恒昌铜箔制造有限公司 | Preparation method of lithium ion battery with positive electrode covered by conductive polymer |
| CN102820471A (en) * | 2011-12-08 | 2012-12-12 | 中航锂电（洛阳）有限公司 | High-safety lithium ion battery cathode material and its preparation method |
-
2013
- 2013-02-25 CN CN201310058511.4A patent/CN103117382B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1937285A (en) * | 2005-09-23 | 2007-03-28 | 中国科学院物理研究所 | Method for preparing lithium secondary cell electrode containing nano additive |
| CN101685883A (en) * | 2008-09-23 | 2010-03-31 | 深圳市比克电池有限公司 | Polymer lithium ion battery and preparation method thereof |
| CN102280656A (en) * | 2011-07-04 | 2011-12-14 | 南陵恒昌铜箔制造有限公司 | Preparation method of lithium ion battery with positive electrode covered by conductive polymer |
| CN102820471A (en) * | 2011-12-08 | 2012-12-12 | 中航锂电（洛阳）有限公司 | High-safety lithium ion battery cathode material and its preparation method |
Non-Patent Citations (1)
| Title |
|---|
| 翟金玲: "锂离子蓄电池正极材料表面包覆研究进展", 《电源技术》 * |
Cited By (19)
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|---|---|---|---|---|
| CN104332588A (en) * | 2014-08-21 | 2015-02-04 | 中航锂电（洛阳）有限公司 | High safety lithium ion battery negative electrode plate, preparation method and applications thereof |
| CN105226234A (en) * | 2015-09-01 | 2016-01-06 | 中航锂电（洛阳）有限公司 | Lithium battery anode composite sheet, lithium battery composite negative plate and preparation method thereof, lithium battery |
| CN105226234B (en) * | 2015-09-01 | 2017-10-10 | 中航锂电（洛阳）有限公司 | Lithium battery anode composite piece, lithium battery composite negative plate and preparation method thereof, lithium battery |
| CN106486651A (en) * | 2015-09-29 | 2017-03-08 | 上海杉杉科技有限公司 | A kind of lithium ion battery negative material of high safety performance and preparation method thereof |
| CN105633340A (en) * | 2015-12-17 | 2016-06-01 | 佛山市南海区欣源电子有限公司 | Composite pole plate of lithium ion battery and preparation method of composite pole plate |
| CN105591070A (en) * | 2016-03-16 | 2016-05-18 | 江苏乐能电池股份有限公司 | Method for preparing high-energy-density negative pole piece and lithium ion battery comprising same |
| CN105591070B (en) * | 2016-03-16 | 2017-11-03 | 江苏乐能电池股份有限公司 | A kind of preparation method of high-energy-density cathode pole piece and its lithium ion battery |
| CN106159201B (en) * | 2016-07-28 | 2019-02-12 | 深圳博磊达新能源科技有限公司 | A kind of lithium ion battery lithium composite sheet and preparation method thereof, lithium ion battery |
| CN106159201A (en) * | 2016-07-28 | 2016-11-23 | 深圳博磊达新能源科技有限公司 | A kind of lithium ion battery lithium composite sheet and preparation method thereof, lithium ion battery |
| CN106229447A (en) * | 2016-08-10 | 2016-12-14 | 东莞永蓝电子科技有限公司 | A kind of lithium ion battery |
| CN106129315A (en) * | 2016-08-19 | 2016-11-16 | 洛阳力容新能源科技有限公司 | A kind of lithium ion battery composite separation membrane and preparation method thereof, lithium ion battery |
| CN106129315B (en) * | 2016-08-19 | 2019-06-25 | 洛阳力容新能源科技有限公司 | A kind of lithium ion battery composite separation membrane and preparation method thereof, lithium ion battery |
| CN106252626A (en) * | 2016-08-26 | 2016-12-21 | 深圳博磊达新能源科技有限公司 | The tool lithium titanate electrode material of nucleocapsid structure, preparation method and application |
| CN106159236A (en) * | 2016-08-26 | 2016-11-23 | 深圳博磊达新能源科技有限公司 | A kind of quick charge lithium titanate composite negative pole pole piece and lithium ion battery |
| CN106099041A (en) * | 2016-08-26 | 2016-11-09 | 深圳博磊达新能源科技有限公司 | A kind of lithium titanate composite negative pole pole piece and lithium titanate battery |
| CN106252626B (en) * | 2016-08-26 | 2019-03-26 | 深圳博磊达新能源科技有限公司 | Have lithium titanate electrode material, the preparation method and application of core-shell structure |
| CN106252598A (en) * | 2016-08-29 | 2016-12-21 | 深圳博磊达新能源科技有限公司 | A kind of high power capacity, high security lithium ion battery cathode composite pole piece and preparation method thereof, lithium ion battery |
| CN106252598B (en) * | 2016-08-29 | 2019-11-05 | 深圳博磊达新能源科技有限公司 | A kind of high capacity, high security lithium ion battery cathode composite pole piece and preparation method thereof, lithium ion battery |
| CN106450166A (en) * | 2016-11-10 | 2017-02-22 | 厦门日臻动力电源科技有限公司 | Preparation method of lithium ion battery negative electrode composite pole piece |
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