CN101090154A - Plus plate assembly of lithium ion battery - Google Patents
Plus plate assembly of lithium ion battery Download PDFInfo
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- CN101090154A CN101090154A CNA2007101439181A CN200710143918A CN101090154A CN 101090154 A CN101090154 A CN 101090154A CN A2007101439181 A CNA2007101439181 A CN A2007101439181A CN 200710143918 A CN200710143918 A CN 200710143918A CN 101090154 A CN101090154 A CN 101090154A
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- lithium ion
- ion battery
- battery
- plate assembly
- lithium
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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
This invention relates to positive composition of Li ion cell including 3-10% binder and 1-5% carbon black as a conduction agent, 0.1-5% carbon nm tubes as an assistant conduction agent and lithium iron phosphate, which increases the efficiency of cells by adding carbon nm tubes as the assistant conduction agent and utilizes the conductiveness of the carbon nm tubes to increase the conductiveness of positive pole.
Description
Technical field
The present invention is a kind of lithium ion battery, and it refers to a kind of plus plate assembly of lithium ion battery especially.
Background technology
At present, the low capacity lithium battery of 3C industry---the production as battery of mobile phone, cells in notebook computer etc. is tending towards saturated substantially, but jumbo power lithium-ion battery does not but still come into the market.Electric motor car and large-scale portable power source application are still plumbic acid system battery in occupation of leading position.Lithium ion battery has been taken as the leading factor with cobalt acid lithium, manganate cathode material for lithium since coming out always, and cobalt acid lithium and lithium manganate material be because self-security is poor, cycle life shortcoming such as lack, costs an arm and a leg, and all can not really be suitable for the lithium-ion-power cell industry need.After a new generation's lithium electricity positive electrode material LiFePO 4 of lithium is progressively come upon the stage, really represented the broad space, opened up new world for the development of big capacity lithium dynamical battery and renewal.The situation that lithium battery replaces battery systems such as plumbic acid, ni-mh will become the inexorable trend that battery industry develops.
The quality of anode material for lithium-ion batteries, roughly can assess from the following aspects:
(1) positive electrode should have higher electrode potential, makes battery that higher output voltage be arranged;
(2) can be in the positive electrode a large amount of reversibly embedding of lithium ion and take off embedding is so that battery has high capacity;
(3) embed at lithium ion/take off in the embedding process, the structure of positive electrode should not change or change for a short time as far as possible, to guarantee the battery excellent cycle performance;
(4) change in the embedding process in the embedding of lithium ion/take off should be as far as possible little for Zheng Ji oxidation-reduction potential, the voltage of battery can not shown change, and charges reposefully and discharge to guarantee battery;
(5) material structure does not subside positive electrode in the embedding process in the embedding of lithium ion/take off, and makes the voltage of battery marked change can not take place, to guarantee battery security;
(6) positive electrode should have higher conductivity, can make charging of the big electric current of battery ground and discharge;
(7) chemical reaction does not take place with electrolyte etc. in positive pole;
(8) lithium ion should have bigger diffusion coefficient in electrode material, is convenient to quickly charging battery and discharge;
(9) low price, environmentally safe.
What in fact, power lithium-ion battery needed most concern should be the problem of its security performance.Ferrous phosphate lithium battery anode material is in nine above-mentioned judgment criteria, except 6,8 indexs are not high, all other indexs are in the positive electrode best, especially security performance reliable with have extended cycle life that other material institute is impayable especially, this also weighs the most important technical indicator of electrokinetic cell performance just.The problem of only depositing now is exactly how to make high capacity lithium ion battery with lithium iron phosphate cathode material, and promptly who occupies ferrous phosphate lithium ion electrokinetic cell market earlier, and who will be expected to become the leader in electrokinetic cell market.
Ferrous lithium phosphate cathode is used for high-power electrokinetic cell and is used widely, yet the electric conductivity of its material own differs from 1～2 order of magnitude than traditional cobalt acid lithium, lithium manganate material, therefore, the present invention is directed to the conductivity that increases positive pole is to strengthen the key of its high power discharge performance.
Summary of the invention
Main purpose of the present invention provides a kind of plus plate assembly of lithium ion battery, and it is to utilize carbon nano-tube with the conduction assistant agent as ferrous lithium phosphate cathode, to increase the task performance of lithium ion battery.
For realizing purpose of the present invention, the present invention is a kind of plus plate assembly of lithium ion battery, its anodal constituent comprises LiFePO 4, binding agent, carbon black, carbon nano-tube, utilize carbon black as conductive agent and use carbon nano-tube as the additional conductive agent, the use carbon nano-tube to improve the conductivity of positive level, increases the operating efficiency of battery as the additional conductive agent.
Compared to prior art, the present invention has following advantage: make with the LiFePO 4 to be anodal battery, its conductivity is enhanced, and adds macrocell high-power operation performance.
Description of drawings
Fig. 1: it is the flow chart of the lithium battery anode making of a preferred embodiment of the present invention.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing:
Be the conductivity of the lithium ion cell positive that solves prior art, the present invention provides and add the additional conductive agent in positive pole, improves anodal conductivity with this.
At first, see also Fig. 1, it is the flow chart of the lithium ion cell positive making of a preferred embodiment of the present invention; As shown in the figure, the manufacture method of the plus plate assembly of disclosed lithium ion battery, its step includes:
Step S1 played glue 2 hours with 3～10% binding agent earlier, so that this binding agent dissolving disperses;
Step S2 adds 1～5% carbon black again as conductive agent, dispersed with stirring 1～2 hour;
Step S3 adds 0.1～5% carbon nano-tube again as the additional conductive agent, dispersed with stirring 1～2 hour; And
Step S4 adds LiFePO 4 dry powder again, stirs 3～8 hours, and adjusting viscosity is 5000～12000mpas
-1, discharging.
CNT (carbon nano-tube) has excellent and special material behavior, as light weight, high strength, high tenacity, high fineness ratio, high surface, high thermal conductance degree, conductivity etc.Because carbon is the lightest element in the period of element Table IV family, having four electronics can be for carrying out bond with other elements, the semimetal layer of the graphite two-dimensional layered structure that to be carbon atom form with the covalent bond bond of SP2 and interlayer are approximately apart from 0.3354nm, the pi-electron that itself has a P orbital can move freely on two dimensional surface, so have conductive characteristic, the conductive capability that therefore utilizes CNT (carbon nano-tube) is to improve anodal conductivity.So the present invention utilizes its characteristic to promote the efficient of battery.
Wherein, binding agent is to be selected from wherein a kind of of polyvinylidene fluoride resin (PVDF) and butadiene-styrene rubber (SBR); And carbon nano-tube also can be selected from the carbon nano-tube of single wall or many walls, and its caliber is 1-100nm, and length is 50um-100um.
Claims (5)
1, a kind of plus plate assembly of lithium ion battery, it comprises binding agent, carbon black, LiFePO 4, it is characterized in that: add carbon nano-tube.
2, the plus plate assembly of lithium ion battery according to claim 1 is characterised in that: the content of carbon nano-tube is 0.1-5%w.t..
3, the plus plate assembly of lithium ion battery according to claim 1 is characterised in that: carbon nano-tube is single wall or many walls.
4, the plus plate assembly of lithium ion battery according to claim 1 is characterised in that: the caliber of carbon nano-tube is 1-100nm.
5, the plus plate assembly of lithium ion battery according to claim 1 is characterised in that: the length of carbon nano-tube is 50nm-100nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101439181A CN101090154A (en) | 2007-08-14 | 2007-08-14 | Plus plate assembly of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101439181A CN101090154A (en) | 2007-08-14 | 2007-08-14 | Plus plate assembly of lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
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| CN101090154A true CN101090154A (en) | 2007-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CNA2007101439181A Pending CN101090154A (en) | 2007-08-14 | 2007-08-14 | Plus plate assembly of lithium ion battery |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101859892A (en) * | 2010-04-27 | 2010-10-13 | 清华大学 | Lithium-ion battery anode and preparation method thereof |
| CN101924198A (en) * | 2010-06-12 | 2010-12-22 | 河北金力新能源材料科技有限公司 | Positive pole material of lithium ion battery and preparation method thereof |
| CN101621121B (en) * | 2008-07-04 | 2011-01-26 | 合肥国轩高科动力能源有限公司 | Method for preparing high-power lithium iron phosphate composite materials |
| CN102082273A (en) * | 2010-12-24 | 2011-06-01 | 上海中兴派能能源科技有限公司 | Lithium ion battery and electrode material, electrode paste and electrodes of lithium ion battery |
| CN102356490A (en) * | 2009-03-19 | 2012-02-15 | 阿克马法国公司 | Fluorinated binder composite materials and carbon nanotubes for positive electrodes for lithium batteries |
| CN102668191A (en) * | 2009-11-18 | 2012-09-12 | 电气化学工业株式会社 | Positive-electrode material for a lithium ion secondary battery, and manufacturing method therefor |
| CN103208631A (en) * | 2012-01-17 | 2013-07-17 | 万向电动汽车有限公司 | Lithium battery positive electrode slurry and preparation method thereof |
-
2007
- 2007-08-14 CN CNA2007101439181A patent/CN101090154A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101621121B (en) * | 2008-07-04 | 2011-01-26 | 合肥国轩高科动力能源有限公司 | Method for preparing high-power lithium iron phosphate composite materials |
| CN102356490A (en) * | 2009-03-19 | 2012-02-15 | 阿克马法国公司 | Fluorinated binder composite materials and carbon nanotubes for positive electrodes for lithium batteries |
| EP2503626A4 (en) * | 2009-11-18 | 2014-02-05 | Denki Kagaku Kogyo Kk | Positive-electrode material for a lithium ion secondary battery, and manufacturing method therefor |
| CN102668191A (en) * | 2009-11-18 | 2012-09-12 | 电气化学工业株式会社 | Positive-electrode material for a lithium ion secondary battery, and manufacturing method therefor |
| CN102668191B (en) * | 2009-11-18 | 2015-04-22 | 电气化学工业株式会社 | Positive-electrode material for a lithium ion secondary battery, and manufacturing method therefor |
| US8597835B2 (en) * | 2009-11-18 | 2013-12-03 | Denki Kagaku Kogyo Kabushiki Kaisha | Positive-electrode material for a lithium ion secondary battery and manufacturing method of the same |
| EP2503626A1 (en) * | 2009-11-18 | 2012-09-26 | Denki Kagaku Kogyo Kabushiki Kaisha | Positive-electrode material for a lithium ion secondary battery, and manufacturing method therefor |
| CN101859892A (en) * | 2010-04-27 | 2010-10-13 | 清华大学 | Lithium-ion battery anode and preparation method thereof |
| CN101859892B (en) * | 2010-04-27 | 2012-11-21 | 清华大学 | Lithium-ion battery anode and preparation method thereof |
| US9065114B2 (en) | 2010-04-27 | 2015-06-23 | Tsinghua University | Cathode of lithium ion battery and method for fabricating the same |
| CN101924198A (en) * | 2010-06-12 | 2010-12-22 | 河北金力新能源材料科技有限公司 | Positive pole material of lithium ion battery and preparation method thereof |
| CN101924198B (en) * | 2010-06-12 | 2011-12-07 | 河北金力新能源材料科技有限公司 | Preparation method of positive pole material of lithium ion battery |
| CN102082273B (en) * | 2010-12-24 | 2012-09-05 | 上海中兴派能能源科技有限公司 | Lithium ion battery and electrode material, electrode paste and electrodes of lithium ion battery |
| CN102082273A (en) * | 2010-12-24 | 2011-06-01 | 上海中兴派能能源科技有限公司 | Lithium ion battery and electrode material, electrode paste and electrodes of lithium ion battery |
| CN103208631A (en) * | 2012-01-17 | 2013-07-17 | 万向电动汽车有限公司 | Lithium battery positive electrode slurry and preparation method thereof |
| CN103208631B (en) * | 2012-01-17 | 2016-02-17 | 万向电动汽车有限公司 | A kind of lithium battery anode slurry and preparation method thereof |
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