CN102544498A - Cathode material of lithium ion battery - Google Patents
Cathode material of lithium ion battery Download PDFInfo
- Publication number
- CN102544498A CN102544498A CN2012100633611A CN201210063361A CN102544498A CN 102544498 A CN102544498 A CN 102544498A CN 2012100633611 A CN2012100633611 A CN 2012100633611A CN 201210063361 A CN201210063361 A CN 201210063361A CN 102544498 A CN102544498 A CN 102544498A
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- lithium
- battery
- cathode material
- titanate
- manganate
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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 relates to a cathode material of a lithium ion battery. The cathode material comprises lithium ferrous phosphate, nickel and cobalt lithium manganate and lithium titanate, wherein the mole ratio of the lithium ferrous phosphate to the nickel and cobalt lithium manganate to the lithium titanate is (6-20):1:0.5. The charge time of a lithium ferrous phosphate battery when charge voltage reaches upper limit voltage and the discharge time of the lithium ferrous phosphate battery when discharge voltage reaches lower limit voltage are prolonged, the safety of the battery is ensured, and the service life of the battery is prolonged. At the same time, the cathode material is prepared by adding the nickel and cobalt lithium manganate and the lithium titanate into the lithium ferrous phosphate and only by uniformly mixing the three materials without preparing new materials, so the cost is not obviously increased.
Description
Technical field
The present invention relates to the electric car power supply equipment technical field, be specifically related to a kind of positive electrode of lithium ion battery.
Background technology
Automobile is a kind of important vehicles, but along with the continuous deterioration of the in short supply day by day and natural environment of global energy, in order to reduce the pollution discharge capacity of city automobile, realizes the development strategy of new-energy automobile, and the development electric automobile is the current most important thing.Electrokinetic cell is one of basic power source that provides power to electric automobile, and as far as electrokinetic cell, the selection of its positive electrode is very crucial.At present, the positive electrode that use amount is maximum in lithium ion battery mainly is cobalt acid lithium (LiCoO
2), LiMn2O4 (LiMn
2O
4), nickle cobalt lithium manganate (LiCo
xNi
yMn
zO
2) and LiFePO 4 (LiFePO
4).But comprehensively comparatively speaking, lithium iron phosphate cathode material big capacity, first-selected positive electrode of middle high power lithium ion cell in having outstanding advantage aspect cost, high-temperature behavior, the fail safe, having become.
And ferrous phosphate lithium battery has overcharging resisting not or cross the characteristic of putting, and when charging voltage surpasses its upper voltage limit when (promptly surpassing the 3.7V/ joint), the voltage of battery will rise rapidly, and battery is overcharged; Simultaneously, when discharge voltage surpassed its lower voltage limit (promptly surpassing 2.5V/ saves), the voltage of battery will descend rapidly, and makes battery take place to put; Overcharge and cross to put all and can damage the ferrous phosphate lithium dynamical battery.Current battery in use; Usually use the voltage of battery management system monitoring battery to determine when that charge and discharge finish; If yet voltage sample is inaccurate, perhaps battery management system is out of order, and all can cause overcharging or putting excessively of battery; Thereby the damage battery reduces its useful life.Therefore, need to prolong the charging interval of ferrousphosphate lithium material when being charged to upper voltage limit and the discharge time when discharging into lower voltage limit, thus improve ferrousphosphate lithium material battery itself overcharging resisting or put performance.
Summary of the invention
The present invention is exactly the deficiency that solves existing ferrousphosphate lithium material battery, and a kind of lithium ion power battery cathode material is provided, to prolong the charging interval of ferrousphosphate lithium material when being charged to upper voltage limit and the discharge time when discharging into lower voltage limit.
In order to reach above-mentioned effect; Technical scheme of the present invention is a kind of anode material for lithium-ion batteries; Said positive electrode comprises LiFePO 4, nickle cobalt lithium manganate and lithium titanate, and the mol ratio of said LiFePO 4, nickle cobalt lithium manganate and lithium titanate is 6～20:1:0.5.
The preferred version of such scheme is that the mol ratio of said LiFePO 4, nickle cobalt lithium manganate and lithium titanate is 10～15:1:0.5.
Anode material for lithium-ion batteries of the present invention also comprises binding agent and conductive agent, and said binding agent is for gathering inclined to one side tetrafluoroethene (PVDF), and it accounts for the positive electrode mass percent is 3～10%; Conductive agent is an acetylene black, and it accounts for the positive electrode mass percent is 5～8%.
In addition, conductive agent and binding agent can also adopt lithium ion battery conductive agent and binding agent commonly used, can be acetylene black, carbon nanometer tube, nanometer silver powder, carbon black etc. like conductive agent; Binding agent can be for gathering inclined to one side tetrafluoroethene, polyvinylidene fluoride etc.
Wherein, Nickle cobalt lithium manganate has replaced the cobalt more than 2/3rds in the cobalt acid lithium with relatively inexpensive nickel and manganese; Become the new battery material that replaces cobalt acid lithium; Be used widely as the lithium ion battery of positive electrode with the nickle cobalt lithium manganate ternary material at present, the nominal voltage of this lithium battery (is negative pole with the carbon black) is 3.7V.The lithium titanate quilt is widely as lithium ion battery negative material; Form the lithium rechargeable battery of 2.4 V or 1.9V with positive electrodes such as LiMn2O4, nickle cobalt lithium manganate ternary material or LiFePO 4s, lithium titanate is just had report the eighties as the positive electrode eighties of last century of lithium ion battery.Also useful lithium titanate and carbon black are processed the report that nominal voltage is the battery of 2.5V in the recent period.
The nominal voltage of ferrousphosphate lithium material battery is 3.2V, and the charging upper voltage limit is 3.7V, and the discharge lower voltage limit is 2.5V; The nominal voltage of nickle cobalt lithium manganate ternary material battery is 3.7V; The nominal voltage of lithium titanate battery is 2.5V; Therefore can add nickle cobalt lithium manganate ternary material, lithium titanate material at ferrousphosphate lithium material, prolong ferrous phosphate lithium battery and be charged to the upper limit and the time that discharges into lower limit.
Battery operated principle of the present invention is: the operating voltage of battery is 3.2V; When battery charge reaches LiFePO 4 upper limit 3.7V; Reach the operating voltage of nickel-cobalt lithium manganate material, this moment, voltage rose very slowly, so voltage can not rise rapidly and causes and overcharge; When battery discharge when the 2.5V, reach the operating voltage of lithium titanate material, this moment, voltage descended very slowly, so voltage can not descend rapidly and caused and put.
Cell positive material of the present invention is to be mixed by LiFePO 4, nickle cobalt lithium manganate and lithium titanate three, and its making or processing method separately all is known technologies.
The present invention is earlier with LiFePO 4, nickle cobalt lithium manganate and lithium titanate in proportion, adds an amount of binding agent again, conductive agent carries out and expect, is modulated into slurry after mixing, and is applied to the positive plate of processing battery on aluminium foil or the aluminium strip.Again this positive plate and barrier film, negative plate are wound into square volume core and pack in the box hat, inject the electrokinetic cell that electrolyte has just been processed lithium ion after the Laser Welding.
The present invention has the following advantages:
Discharge time when 1, the present invention has prolonged the charging interval when ferrous phosphate lithium battery is charged to upper voltage limit and discharged into lower voltage limit; Thereby improved the overcharging resisting of battery itself or crossed and put performance; Guarantee the fail safe of battery, and prolonged the useful life of battery.
The battery that positive electrode of the present invention is processed is compared with existing lithium iron phosphate cathode material battery, and minimum prolongation of its charging interval 13.3 minutes prolongs 22.9 minutes at most; Discharge time, minimum prolongation was 9.0 minutes, prolonged 14.1 minutes at most.Specifically see the following form:
2, the present invention adds nickel-cobalt lithium manganate material and lithium titanate material in ferrousphosphate lithium material, need not to prepare new material, just these three kinds of positive electrodes is mixed to get final product, and therefore can obviously not increase cost, and simple to operate.
Embodiment
Lithium ion power battery cathode material manufacture method of the present invention is a known technology, is prepared into ferrousphosphate lithium material, nickel-cobalt lithium manganate material and lithium titanate material by known technology respectively.The ferrousphosphate lithium material for preparing when adding and expect, is added an amount of nickel-cobalt lithium manganate material and lithium titanate material, stir then.
Embodiment one:
94.8 (0.6 moles) gram LiFePO 4s, 21.2 (0.1 mole) gram nickle cobalt lithium manganates, 5.5 (0.05 mole) gram lithium titanate is mixed with 7 gram acetylene black conductive agents with 5 gram PVDF binding agents; Be modulated into slurry after mixing, be applied to the positive plate of processing battery on aluminium foil or the aluminium strip.Again this positive plate and barrier film, negative plate are wound into square volume core and pack in the box hat, inject the electrokinetic cell that electrolyte has just been processed lithium ion after the Laser Welding.
Embodiment two:
79 (0.5 moles) gram LiFePO 4s, 10.6 (0.05 mole) gram nickle cobalt lithium manganates, 2.8 (0.025 mole) gram lithium titanate is mixed with 7.6 gram acetylene black conductive agents with 5 gram PVDF binding agents; Be modulated into slurry after mixing, be applied to the positive plate of processing battery on aluminium foil or the aluminium strip.Again this positive plate and barrier film, negative plate are wound into square volume core and pack in the box hat, inject the electrokinetic cell that electrolyte has just been processed lithium ion after the Laser Welding.
Embodiment three:
118.5 (0.75 moles) gram LiFePO 4s, 10.6 (0.05 mole) gram nickle cobalt lithium manganates, 2.8 (0.025 mole) gram lithium titanate is mixed with 7.6 gram acetylene black conductive agents with 5.3 gram PVDF binding agents; Be modulated into slurry after mixing, be applied to the positive plate of processing battery on aluminium foil or the aluminium strip.Again this positive plate and barrier film, negative plate are wound into square volume core and pack in the box hat, inject the electrokinetic cell that electrolyte has just been processed lithium ion after the Laser Welding.
Embodiment four:
158 (1.0 moles) gram LiFePO 4s, 10.6 (0.05 mole) gram nickle cobalt lithium manganates, 2.8 (0.025 mole) gram lithium titanate is mixed with 12.6 gram acetylene black conductive agents with 16 gram PVDF binding agents; Be modulated into slurry after mixing, be applied to the positive plate of processing battery on aluminium foil or the aluminium strip.Again this positive plate and barrier film, negative plate are wound into square volume core and pack in the box hat, inject the electrokinetic cell that electrolyte has just been processed lithium ion after the Laser Welding.
Embodiment five:
The battery that battery that positive electrode of the present invention is processed and lithium iron phosphate cathode material are processed carries out the charge and discharge time ratio.
The battery of lithium iron phosphate cathode material in lithium ion battery among the embodiment one to embodiment three and the prior art is carried out the charge and discharge time ratio.
Assay method is that 0.3 times of electric current with rated cell capacity carries out charge and discharge to above-mentioned battery, and voltage range is 3.9V～2.0V.Measure voltage during charging and rise to the needed time of 3.9V from 3.7V; Measure voltage during discharge and reduce to the needed time of 2.0V from 2.5V.
Concrete data see the following form one:
Table one: charge and discharge time comparison sheet
Can draw from The above results: the positive electrode battery that the present invention is processed by LiFePO 4, nickle cobalt lithium manganate and lithium titanate, its charging from 3.7V to 3.9V, the time of discharge from 2.5V to 2.0V is all greater than the charge and discharge time with the lithium iron phosphate cathode material battery.Minimum prolongation of charging interval 13.3 minutes prolongs 22.9 minutes at most; Discharge time, minimum prolongation was 9.0 minutes, prolonged 14.1 minutes at most.Discharge time when having prolonged the charging interval when ferrousphosphate lithium material is charged to upper voltage limit greatly and having discharged into lower voltage limit, improve the overcharging resisting of battery itself or crossed and put performance, guarantee the fail safe of battery, and prolonged the useful life of battery.
Above embodiment is not limited only to protection scope of the present invention, all make amendment based on basic thought of the present invention or change all belong to protection scope of the present invention.
Claims (3)
1. anode material for lithium-ion batteries, it is characterized in that: said positive electrode comprises LiFePO 4, nickle cobalt lithium manganate and lithium titanate, the mol ratio of said LiFePO 4, nickle cobalt lithium manganate and lithium titanate is 6～20:1:0.5.
2. a kind of anode material for lithium-ion batteries according to claim 1 is characterized in that: the mol ratio of said LiFePO 4, nickle cobalt lithium manganate and lithium titanate is 10～15:1:0.5.
3. a kind of anode material for lithium-ion batteries according to claim 1 and 2 is characterized in that: also comprise binding agent and conductive agent, said binding agent is for gathering inclined to one side tetrafluoroethene, and it accounts for the positive electrode mass percent is 3～10%; Conductive agent is an acetylene black, and it accounts for the positive electrode mass percent is 5～8%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100633611A CN102544498A (en) | 2012-03-12 | 2012-03-12 | Cathode material of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100633611A CN102544498A (en) | 2012-03-12 | 2012-03-12 | Cathode material of lithium ion battery |
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| CN102544498A true CN102544498A (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012100633611A Pending CN102544498A (en) | 2012-03-12 | 2012-03-12 | Cathode material of lithium ion battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107910507A (en) * | 2017-10-27 | 2018-04-13 | 天津市捷威动力工业有限公司 | A kind of tertiary cathode material |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1949563A (en) * | 2006-10-26 | 2007-04-18 | 复旦大学 | High safety performance lithium ion cell and preparing method thereof |
| CN101232094A (en) * | 2008-02-02 | 2008-07-30 | 广州市鹏辉电池有限公司 | Lithium ion battery negative pole active materials and battery |
| CN101232095A (en) * | 2008-02-02 | 2008-07-30 | 广州市鹏辉电池有限公司 | Lithium ion battery positive pole active materials and battery |
| CN101404329A (en) * | 2008-05-20 | 2009-04-08 | 龚思源 | Phosphate and lithium titanate composite anode material for lithium ion battery and method for producing the same |
| CN102117913A (en) * | 2009-12-31 | 2011-07-06 | 珠海光宇电池有限公司 | Power battery using mixed anode material |
-
2012
- 2012-03-12 CN CN2012100633611A patent/CN102544498A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1949563A (en) * | 2006-10-26 | 2007-04-18 | 复旦大学 | High safety performance lithium ion cell and preparing method thereof |
| CN101232094A (en) * | 2008-02-02 | 2008-07-30 | 广州市鹏辉电池有限公司 | Lithium ion battery negative pole active materials and battery |
| CN101232095A (en) * | 2008-02-02 | 2008-07-30 | 广州市鹏辉电池有限公司 | Lithium ion battery positive pole active materials and battery |
| CN101404329A (en) * | 2008-05-20 | 2009-04-08 | 龚思源 | Phosphate and lithium titanate composite anode material for lithium ion battery and method for producing the same |
| CN102117913A (en) * | 2009-12-31 | 2011-07-06 | 珠海光宇电池有限公司 | Power battery using mixed anode material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107910507A (en) * | 2017-10-27 | 2018-04-13 | 天津市捷威动力工业有限公司 | A kind of tertiary cathode material |
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Application publication date: 20120704 |