CN101859890A - Anode material of lithium ion battery - Google Patents
Anode material of lithium ion battery Download PDFInfo
- Publication number
- CN101859890A CN101859890A CN201010207893A CN201010207893A CN101859890A CN 101859890 A CN101859890 A CN 101859890A CN 201010207893 A CN201010207893 A CN 201010207893A CN 201010207893 A CN201010207893 A CN 201010207893A CN 101859890 A CN101859890 A CN 101859890A
- Authority
- CN
- China
- Prior art keywords
- lithium
- ion battery
- lithium ion
- battery
- graphite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
Landscapes
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention relates to the technical field of lithium-ion batteries, in particular to an improvement on a formula of an anode material of a lithium-ion battery. The anode material of the lithium-ion battery comprises the following components by weight percent: 70 to 90% of active substance graphite, 0.5 to 20% of lithium titanate, 1 to 5% of conductive agent and 1 to 5% of binder. The conductive agent is graphite or acetylene carbon black, and the binder is PVDF resin or polyvinylidene fluoride. The invention can effectively prevent the failure of the lithium-ion battery caused by self-discharge of a protection plate by utilizing the capacity increased by adding a certain amount of lithium titanate, thereby ensuring that an electric device can be stored for a long time under the uncharged condition after a user uses the electric device.
Description
Technical field
The present invention relates to technical field of lithium ion, relate in particular to a kind of lithium ion battery negative material and improve.
Background technology
At present, the used positive electrode of lithium ion battery mostly is cobalt acid lithium, LiMn2O4, ternary material etc. greatly, and its component mainly is that active material (cobalt acid lithium, LiMn2O4, ternary etc.) adds conductive agent adding additives again; It is active material that negative material adopts graphite mostly, adds some conductive agents and binding agent again; The system that such positive and negative pole material is formed has individual common characteristic to discharge the later stage exactly (3.3V is following), and especially when discharge finishes (3.0V), voltage descends very fast, and just in this voltage range the inside, the capacity of lithium ion battery has not almost had.
At present, because the safety problem of lithium ion battery, most of lithium electricity Pack can add baffle when assembling; But because after loading onto lithium battery, can there be a certain size leakage current in the intrinsic defective of baffle self, generally this leakage current is about 10uA.Because the existence of this leakage current is arranged, lithium ion battery is easy to because this leakage current and voltage constantly descends finally causes lithium ion battery to lose efficacy; Especially untimely charging after the user uses electrical appliance, this leakage current can make lithium battery lose efficacy rapidly.If the lithium ion battery with a 1000mAh is an example; this battery protecting plate leakage current is 10uA; it is 1% that the user uses the back residual capacity, and this battery then only needs elapsed time t=(1000*1%)/(10/1000)=1000h so, and this battery will lose efficacy after just 41 days.
Summary of the invention
Technical problem to be solved by this invention provides a kind of lithium ion battery negative material, adopts the lithium ion battery of this negative material preparation, can improve the lithium ion battery Problem of Failure that causes because of the baffle self discharge effectively.
For solving the problems of the technologies described above, the scheme that the present invention realizes is:
A kind of lithium ion battery negative material is counted by weight percentage, and comprises active material graphite 70～90%, lithium titanate 0.5～20%, conductive agent 1～5% and binding agent 1～5%.
Preferably, count by weight percentage, comprise active material graphite 85%, lithium titanate 5%, conductive agent 5% and binding agent 5%.
Described conductive agent is graphite or acetylene carbon black, and binding agent is PVDF resin or Kynoar.
Compared with prior art, the advantage that has of the present invention is:
The present invention is under the situation that does not change existing lithium ion cell positive; the lithium titanate (Li4Ti5O12) that adds a certain amount of (0.5%～20%) in the negative material the inside improves the inefficacy that lithium ion battery causes because of the baffle self discharge, thereby improves the discharge platform of entire cell.Because the lithium titanate that adds can form a chain-wales near 2.5V, this platform length can increase and extends along with the lithium titanate addition; The battery discharge platform extends just, and battery capacity increases.The present invention adds the capacity that a certain amount of lithium titanate increased by utilizing, and the lithium ion battery that can avoid effectively causing because of the baffle self discharge lost efficacy.Thereby can store the long time under the situation that guarantees the user to use electrical appliance and do not charge.
Description of drawings
Fig. 1 is the discharge curve of existing lithium ion battery;
Fig. 2 is the discharge curve that utilizes the lithium ion battery of negative material preparation of the present invention.
Embodiment
The present invention is intended to protect a kind of the change by an amount of lithium titanate of interpolation in lithium ion battery negative material to have the technical scheme that there is leakage current in lithium battery now.The present invention be different from general prior art scheme just like that only lithium titanate as negative electrode active material; the present invention adds a spot of lithium titanate to change negative material component and proportioning in the negative pole system that with the graphite material is active material, thereby improves the inefficacy of the lithium battery that lithium ion battery causes because of the baffle self discharge.
Illustrate with specific embodiment below and add the effect of lithium titanate in the negative material whole lithium battery discharge platform.With the 1000mAh lithium ion battery is example, adds the lithium titanate of different content in this negative material respectively.
Embodiment one,
Prepare a kind of lithium cell cathode material, its component and proportioning are: comprise active material graphite 89%, lithium titanate 1%, conductive agent 5% and binding agent 5%.Make lithium battery by this negative material, after experiment recorded the electrical equipment use with this battery, the time that this battery can be stored was t=(1000*1%+1000*1%)/(10/1000)=2000h, promptly 83 days.
Embodiment two,
, prepare a kind of lithium cell cathode material, its component and proportioning are: comprise active material graphite 87%, lithium titanate 5%, conductive agent 3% and binding agent 5%.Make lithium battery by this negative material, after experiment recorded the electrical equipment use with this battery, the time that this battery can be stored was t=(1000*1%+1000*5%)/(10/1000)=6000h, just 250 days.
Embodiment three,
Prepare a kind of lithium cell cathode material, its component and proportioning are: comprise active material graphite 72%, lithium titanate 10%, conductive agent 3% and binding agent 5%.Make lithium battery by this negative material, after experiment recorded the electrical equipment use with this battery, the time that this battery can be stored was t=(1000*1%+1000*10%)/(10/1000)=11000h, just 458 days.
From above three examples as can be seen, along with the increase of lithium titanate addition, the battery storage time also extends.But, by the capacity that lithium titanate produces electrical appliance is not contributed, because the platform that lithium titanate produces is at 2.5V, and the cut-ff voltage of electrical appliance is generally all at 3.0V, so also just do not end because voltage is lower than 3.0V to this electrical appliance of platform of lithium titanate.Therefore, the addition of lithium titanate is few more good more from this respect.So, to take all factors into consideration, the optimum addition of lithium titanate should be controlled at 1%～5%.
Above-mentioned only is the preferred embodiment of the present invention; these embodiment only are used to explain the present invention and can not be interpreted as limitation of the present invention; in not deviating from claim of the present invention, under the situation of claimed scope, can carry out various improvement and variation to above-mentioned embodiment.
Claims (3)
1. a lithium ion battery negative material is counted by weight percentage, and comprises active material graphite 70～90%, lithium titanate 0.5～20%, conductive agent 1～5% and binding agent 1～5%.
2. lithium ion battery negative material according to claim 1 is characterized in that: count by weight percentage, preferentially, the lithium titanate adding proportion is 1～5%.
3. lithium ion battery negative material according to claim 1 and 2 is characterized in that: described conductive agent is graphite or acetylene carbon black, and binding agent is PVDF resin or Kynoar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010207893A CN101859890A (en) | 2010-06-21 | 2010-06-21 | Anode material of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010207893A CN101859890A (en) | 2010-06-21 | 2010-06-21 | Anode material of lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101859890A true CN101859890A (en) | 2010-10-13 |
Family
ID=42945640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010207893A Pending CN101859890A (en) | 2010-06-21 | 2010-06-21 | Anode material of lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101859890A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074732A (en) * | 2010-12-25 | 2011-05-25 | 东莞市良源电池科技有限公司 | Lithium ion battery provided with high molecular weight adhesive |
| CN102339995A (en) * | 2011-09-28 | 2012-02-01 | 江苏富朗特新能源有限公司 | Manufacturing method of large-current and long-life lithium battery |
| CN102683705A (en) * | 2012-04-24 | 2012-09-19 | 合肥国轩高科动力能源有限公司 | Lithium-titanate-coated modified graphite composite anode material, and preparation method and application thereof |
| CN103840130A (en) * | 2014-03-24 | 2014-06-04 | 四川剑兴锂电池有限公司 | Lithium battery carbon cathode capable of preventing over-discharging |
| CN106299332A (en) * | 2016-11-02 | 2017-01-04 | 天津市捷威动力工业有限公司 | A kind of safe power lithium-ion battery of height using lithium titanate blending graphite cathode sheet |
| CN109273718A (en) * | 2018-09-20 | 2019-01-25 | 珠海格力电器股份有限公司 | Lithium ion battery and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101373829A (en) * | 2008-10-07 | 2009-02-25 | 深圳市贝特瑞新能源材料股份有限公司 | Titanium-series cathode active material and preparation method thereof, titanium-series lithium ion power battery |
| CN101515640A (en) * | 2008-02-22 | 2009-08-26 | 比亚迪股份有限公司 | Cathode and lithium ion secondary battery containing same |
-
2010
- 2010-06-21 CN CN201010207893A patent/CN101859890A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101515640A (en) * | 2008-02-22 | 2009-08-26 | 比亚迪股份有限公司 | Cathode and lithium ion secondary battery containing same |
| CN101373829A (en) * | 2008-10-07 | 2009-02-25 | 深圳市贝特瑞新能源材料股份有限公司 | Titanium-series cathode active material and preparation method thereof, titanium-series lithium ion power battery |
Non-Patent Citations (1)
| Title |
|---|
| 《电源技术》 20100630 陈京才等 石墨－钛酸锂复合阳极材料的制备及性能 第539页右栏第1段，第541页右栏第2段至第3段 1-3 第134卷, 第6期 2 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074732A (en) * | 2010-12-25 | 2011-05-25 | 东莞市良源电池科技有限公司 | Lithium ion battery provided with high molecular weight adhesive |
| CN102339995A (en) * | 2011-09-28 | 2012-02-01 | 江苏富朗特新能源有限公司 | Manufacturing method of large-current and long-life lithium battery |
| CN102683705A (en) * | 2012-04-24 | 2012-09-19 | 合肥国轩高科动力能源有限公司 | Lithium-titanate-coated modified graphite composite anode material, and preparation method and application thereof |
| CN103840130A (en) * | 2014-03-24 | 2014-06-04 | 四川剑兴锂电池有限公司 | Lithium battery carbon cathode capable of preventing over-discharging |
| CN106299332A (en) * | 2016-11-02 | 2017-01-04 | 天津市捷威动力工业有限公司 | A kind of safe power lithium-ion battery of height using lithium titanate blending graphite cathode sheet |
| CN109273718A (en) * | 2018-09-20 | 2019-01-25 | 珠海格力电器股份有限公司 | Lithium ion battery and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20160104880A1 (en) | Rapid charge lithium-ion battery | |
| CN105048012B (en) | Charging method | |
| JP2004063394A (en) | Nonaqueous electrolyte battery | |
| CN101859890A (en) | Anode material of lithium ion battery | |
| CN110212247B (en) | Battery cell | |
| CN101662046A (en) | Lithium ion battery | |
| CN101924243A (en) | Lithium ion battery | |
| CN203536529U (en) | Lithium ion battery | |
| CN103840130A (en) | Lithium battery carbon cathode capable of preventing over-discharging | |
| CN105206868A (en) | Lithium ion secondary battery for starting of internal combustion engine | |
| CN102332604A (en) | High-power lithium ion battery | |
| CN103594750B (en) | A kind of lithium ionic cell module of resistance to floating charge and floating charge method thereof | |
| WO2021121222A1 (en) | Secondary battery | |
| CN109786875B (en) | Formation method for prolonging storage time of lithium ion battery | |
| CN101894971A (en) | Lithium-ion secondary battery | |
| CN202712358U (en) | Cell of lithium ion battery | |
| CN205335923U (en) | Charge -discharge intelligent management system of lithium cell group | |
| CN103972503B (en) | A kind of anode material for lithium-ion batteries | |
| CN202134620U (en) | Overcharge-resisting lithium ion battery | |
| CN110676514A (en) | Lithium ion battery monomer and formation method thereof | |
| CN100397699C (en) | A lithium ion secondary battery | |
| CN102157756A (en) | Method for prolonging the storage time of lithium battery and lithium battery positive electrode material | |
| CN102208648A (en) | Secondary battery electrode and secondary battery | |
| CN102074934A (en) | Lithium ion battery with long service life | |
| CN104064763A (en) | Lithium battery cathode material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20101013 |