CN101488581A - Lithium ionic power cell - Google Patents
Lithium ionic power cell Download PDFInfo
- Publication number
- CN101488581A CN101488581A CNA2008102443530A CN200810244353A CN101488581A CN 101488581 A CN101488581 A CN 101488581A CN A2008102443530 A CNA2008102443530 A CN A2008102443530A CN 200810244353 A CN200810244353 A CN 200810244353A CN 101488581 A CN101488581 A CN 101488581A
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- China
- Prior art keywords
- cell
- positive pole
- lithium
- performance
- power cell
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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 provides a lithium ion electrokinetic cell which is characterized in that graphitized carbon black V7 with nanometer particle size is adopted in the positive pole material of the cell and the proportion of the graphitized carbon black V7 in the positive pole formula is increased to result in the following mixture ratio of the positive pole material by the following parts by weight: 90-95% of positive pole active material lithium manganate, 1-5% of adhesive PVDF and 1-5% of nanometer conductive agent V7. The invention is a polymer lithium ion electrokinetic cell used for electric motor cars and electric bicycles with high cycle and multiplying power performance. By using the cell, electron conductivity of the positive pole material can be effectively improved and migration rate of lithium ion in electrode material can be increased, thereby improving the cycle performance and the multiplying power performance of the cell, prolonging the service life of the cell and improving the climbing performance of the electric motor cars or the electric bicycles.
Description
Technical field
The present invention relates to a kind of polymer lithium ion secondary battery, in particular, relate to the polymer lithium ion power cell that is applied to battery-operated motor cycle and vehicle using motor.
Background technology
Since nineteen ninety Sony company commercialization lithium rechargeable battery is released, just with its light weight, advantages such as volume is little, energy density is big, operating temperature range is wide, environmentally friendly, memory-less effect realize development fast, require very harsh electrical source of power field to be expected very much in power supply capacity, life-span and security performance especially in recent years.Along with the raising of in short supply day by day and people's economy consciousness of global energy, lithium ion battery applications has become trend in the power drive field, if lithium-ion-power cell can be used widely, will have far-reaching influence for energy savings.
At present, what battery-operated motor cycle and vehicle using motor used mainly is lead-acid battery, lithium-ion-power cell is not also used on a large scale, main cause is that its cost performance is not better than lead-acid battery, search to the bottom is because jumbo lithium-ion-power cell is not fully up to expectations aspect circulation and high rate performance, and the conductivity that the direct decision key element of these two performances is exactly an anode, good conductivity the circulation and the high rate performance of battery will significantly improve.The conductive agent that traditional lithium ion cell positive adopts is micron-sized electrically conductive graphite KS-6 and conductive carbon black Super P, but the conductive agent particle is bigger, causes dispersion inhomogeneous in jumbo electrokinetic cell easily, thereby cause poorly conductive, the circulation of battery and high rate performance are descended.
Summary of the invention
The present invention is for avoiding above-mentioned existing in prior technology weak point, a kind of lithium-ion-power cell with high conduction performance, high cycle performance and high rate capability being provided.
Technical solution problem of the present invention adopts following technical scheme:
The characteristics of lithium-ion-power cell of the present invention are that the positive electrode employing particle size of described battery is nano level conductive black V7, and increase the ratio of conductive black V7 in anode formula, make described positive electrode proportioning by weight be:
Positive active material LiMn2O4: 90-95%,
Bonding agent PVDF:1-5%,
Nano-level conducting agent V7:1-5%.
The characteristics of lithium-ion-power cell of the present invention are that also the conductive black V7 particle mean size of described positive electrode is 1-10nm.
Compared with the prior art, lithium-ion-power cell of the present invention has following beneficial effect:
1, the present invention is by increasing the ratio of conductive black V7 in the positive electrode, and the more uniform nano-level conducting carbon black of the employing littler dispersion of particle diameter V7, can further improve the electronic conductivity of positive electrode, strengthen the migration rate of lithium ion in electrode material, thereby improve the cycle performance and the high rate performance of battery.
2, the present invention is because the very big raising of cycle performance and high rate performance, and battery life significantly is improved, and battery-operated motor cycle and the vehicle using motor distance of travelling increases, and grade climbing performance also obviously improves.
Below by embodiment, the invention will be further described.
Embodiment
Technology routinely, lithium-ion-power cell has by anodal, negative pole and the barrier film lamination between both positive and negative polarity and constitutes electric core, electrolyte and outsourcing plastic-aluminum putamina, anodal and negative pole is respectively that load has positive electrode and negative material on collector, negative material comprise native graphite, synthetic graphite, carbon fiber, mesophase ball carbon element, current potential as far as possible near in the embedded lithium compound of lithium current potential a kind of, some kinds or whole.
In the present embodiment, be for the selection of cell positive material:
The cell positive material mixture ratio by weight percent is:
Positive active material LiMn2O4: 90-95%,
Bonding agent PVDF:1-5%,
Nano-level conducting carbon black V7:1-5%,
The particle mean size of conductive black V7 is 1-10nm.
Concrete enforcement can be by the proportioning of carrying out cell positive material as following table 1 listed proportioning:
| The positive active material LiMn2O4 | Bonding agent PVDF | Nano-level conducting carbon black V7 | The particle mean size of conductive black V7 | Explanation | |
| 1 | 90％ | 5％ | 5％ | 10nm | High magnification |
| 2 | 92％ | 5％ | 3％ | 5nm | High circulation |
| 3 | 93％ | 4％ | 3％ | 5nm | The high circulation of high magnification |
| 4 | 95％ | 3％ | 2％ | 1nm | High power capacity |
In concrete the enforcement, except positive electrode is prepared by the proportioning that present embodiment provides, the whole preparation technology of battery carries out fully in the usual way, the batching, stirring, coating and the lamination that comprise anodal and negative material, the electric core of folding is inserted in the battery case, add electrolyte, sealing is finished then.
By experiment, the present embodiment battery is as shown in table 1 at the discharge performance of different multiplying discharge, and battery is as shown in table 2 at 0.3C electric current charge and discharge cycles number of times and residual capacity.
Experiment shows that the present invention can significantly improve the circulation and the high rate performance of polymer lithium ion power cell.
Table 1
| Discharge-rate | 0.3C | 1C | 2C | 3C | 4C | 5C |
| Capacity discharges | 100％ | 98.5％ | 96.35％ | 95.29％ | 92.3％ | 91.6％ |
Table 2
| Cycle-index | 300 times | 500 times |
| Residual capacity | 85％ | 70％ |
Claims (2)
1, lithium-ion-power cell is characterized in that the positive electrode employing particle size of described battery is nano level conductive black V7, and increases the ratio of conductive black V7 in anode formula, makes described positive electrode proportioning by weight be:
Positive active material LiMn2O4: 90-95%,
Bonding agent PVDF:1-5%,
Nano-level conducting agent V7:1-5%.
2, lithium-ion-power cell according to claim 1 is characterized in that the conductive black V7 particle mean size in the described positive electrode is 1-10nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102443530A CN101488581A (en) | 2008-11-28 | 2008-11-28 | Lithium ionic power cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102443530A CN101488581A (en) | 2008-11-28 | 2008-11-28 | Lithium ionic power cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101488581A true CN101488581A (en) | 2009-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102443530A Pending CN101488581A (en) | 2008-11-28 | 2008-11-28 | Lithium ionic power cell |
Country Status (1)
| Country | Link |
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| CN (1) | CN101488581A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN101771148B (en) * | 2010-01-28 | 2012-07-18 | 深圳市创明电池技术有限公司 | Coating of lithium ion battery positive plate, coating preparation method and positive plate |
| CN105037845A (en) * | 2015-09-11 | 2015-11-11 | 中国化工集团曙光橡胶工业研究设计院有限公司 | High-oil-resistance conducting sealant |
-
2008
- 2008-11-28 CN CNA2008102443530A patent/CN101488581A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101771148B (en) * | 2010-01-28 | 2012-07-18 | 深圳市创明电池技术有限公司 | Coating of lithium ion battery positive plate, coating preparation method and positive plate |
| 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 |
| CN105037845A (en) * | 2015-09-11 | 2015-11-11 | 中国化工集团曙光橡胶工业研究设计院有限公司 | High-oil-resistance conducting sealant |
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Open date: 20090722 |