CN102903892A - Method for manufacturing industrial energy storage type lithium battery pole piece - Google Patents
Method for manufacturing industrial energy storage type lithium battery pole piece Download PDFInfo
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- CN102903892A CN102903892A CN2012103957896A CN201210395789A CN102903892A CN 102903892 A CN102903892 A CN 102903892A CN 2012103957896 A CN2012103957896 A CN 2012103957896A CN 201210395789 A CN201210395789 A CN 201210395789A CN 102903892 A CN102903892 A CN 102903892A
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- battery
- lithium battery
- pvdf
- conductive layer
- type 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
The invention discloses a method for manufacturing an industrial energy storage type lithium battery pole piece, and relates to the technical field of manufacture of lithium batteries. An electrode is modified by a method of coating a conductive layer on the surface of a current collector of a battery first, then coating active substances and adding high-voltage platform type (LiNixCoyMnz or LiNixCoyAlz) materials; and the stability of long-term circulation internal resistance of the battery and the stability of initial constant power discharge voltage of the battery are greatly improved, then the cycle life of the battery is prolonged, and requirements on using of an intelligent power grid are met.
Description
Technical field
The present invention relates to the making of lithium ion battery, particularly a kind of manufacture method of industrial accumulation energy type lithium battery pole slice.
Background technology
Most number and the communication products of being used for of the lithium battery product that uses in people's daily life, small part is used for the electric motor car walking-replacing tool, the battery of these products all belongs to civilian level, require relatively low (300-2000 time) to battery cycle life, useful life, 3-5 was no more than at most 10 years.
But country is in the investment construction of intelligent grid at present, need a kind of industrial long-life lithium battery, require calendar life to reach more than 15 years, reach useful life (once discharge and recharge every day) more than 5500 times, mainly be to distributed energy access intelligent grid, carry out peak-frequency regulation and power and stabilize.Manufacture craft according to existing lithium battery pole slice directly applies active material at collector, can't reach the requirement of intelligent grid.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of and can improve lithium battery cycle life, satisfy the manufacture method of the industrial accumulation energy type lithium battery pole slice of intelligent grid instructions for use.
Technical scheme of the present invention is: the manufacture method of industrial accumulation energy type lithium battery pole slice, be included in and apply active material on the collector, its improvements are first coated with conductive layers on collector, apply active material at conductive layer again, each component and mass percent thereof are in the material of described conductive layer: electrically conductive graphite 85%～97.5%, PVDF bonding agent 2.5%～15%, add high voltage flatbed material LiNi in the described active material
xCo
yMn
zOr LiNi
xCo
yAl
zElectrode is modified, and wherein X, Y, Z sum are 1.
Material preparation and the coating procedure of described conductive layer are:
(1) take by weighing electrically conductive graphite and PVDF, place respectively vacuum drying oven, toasted 12～24 hours under 80～120 ℃ of temperature, equitemperature is down to 50 ℃ of taking-ups after the baking;
(2) PVDF that drying is good adds nmp solvent, and the two mass ratio of front and back is 1:(5～20), the rotating speed with 25～40Hz in Vacuum mixer stirred 5～10 hours, made the PVDF slurry;
(3) electrically conductive graphite that drying is good adds the PVDF slurry again, and the rotating speed with 15～25Hz in vacuum stirring equipment stirred 5～10 hours, stir finish with-0.075Mpa～-vacuum keep 25～35min of 0.085Mpa processing of cooling down;
(4) at last usefulness printing coating machine is coated on the collector by the material that makes more than the pressing method general, and the material single face surface density of coating is 1～1.5g/ ㎡, and thickness is 1～5 μ m after the roll-in.
Each component of described active material and mass percent are: LiFePO4 75%～96%, high voltage flatbed material 0.5%～15%, PVDF2.5%～15%.
Since the graphite linings that this printing applies as thin as a wafer and evenly, exquisiteness, can match with coarse collector metal surface, splendid static electric conductivity is provided, collect little electric current of active material, thereby can significantly reduce the contact resistance between electrode active material and the collector, and can improve between the two adhesive ability, because by the coated with conductive layer, improved the stability of the internal resistance of cell, reduce the battery bulging that the temperature rise of battery charge and discharge process causes, thereby significantly increased the cycle life of battery.
Selecting aspect the high voltage modified material, can select LiNi
xCo
yMn
zOr LiNi
xCo
yAl
zDeng material, because these materials and anodal LiFePO4 (LiFePO
4) material 3.2V discharge platform is compared has higher discharge voltage plateau and (can reach 3.5～3.6V), thereby battery can play and keep battery incipient stability flash-over characteristic (illustrate: the energy-accumulating power station that cooperates electrical network to use generally carries out permanent power and sends out merit) when the instantaneous permanent power discharge of high potential.
Embodiment
Further specify the present invention below by embodiment.
(1) preparation of conductive layer material and coating
Take by weighing the electrically conductive graphite powder of 900g with electronic balance, take by weighing the PVDF of 100g, contain respectively in the batching vessel, then unification is placed in the vacuum drying oven, and oven temperature is set: 100 ℃, and stoving time: 15h, baking waits until that oven temperature is reduced to 50 ℃ after finishing, and takes out raw material.
Prepare again bonding agent, the nmp solvent of 700g is added in the Vacuum mixer of 5L, then the good PVDF of drying is joined wherein, carry out the stir process of 8h with the rotating speed of 30HZ.
Then the good electrically conductive graphite of drying, transferring to the 5L that prepares the PVDF slurry with vessel vacuumizes in the mixing plant, carry out again the stir process of 8h with the rotating speed of 20HZ, stir to finish with gauge pressure-0.075MPa～-the vacuum keep vacuum 30min of 0.085MPa eliminates the bubble processing.
At last with the printing coating machine, the method by extruding is coated to the material of above-mentioned preparation on the collector, and the material single face surface density that requires to apply is at 1～1.5g/m
2, thickness is respectively 1,3,5 μ m after the roll-in.
(2) active material prepares material proportion wt%:LiFePO
485%, LiNi
0.33Co
0.33Al
0.33: 7%, PVDF(bonding agent): 8%.
Concrete operations are same as the prior art, and active material is coated on the conductive layer.
(3) coat is on the impact of internal resistance of cell stability
The 10Ah(1865140 of employing same model) ferric phosphate lithium cell compares test, anodal coated with conductive layer average thickness is respectively: the battery of 1 μ m, 3 μ m, 5 μ m; With do not carry out 1 of coating processing
# ～5
# Battery carries out the contrast of 1000 circulation front and back internal resistance amounts of increase.
Actual test data is as follows:
Illustrate: the internal resistance of battery has growth in various degree along with the increase of battery cycle life, but the amplitude of its growth of battery that applies through conductive layer far away (more than 10 times) less than the battery of uncoated conductive layer.
Claims (3)
1. the manufacture method of an industrial accumulation energy type lithium battery pole slice, be included in and apply active material on the collector, it is characterized in that first coated with conductive layer on collector, apply active material at conductive layer again, each component and mass percent thereof are in the material of described conductive layer: electrically conductive graphite 85%～97.5%, PVDF bonding agent 2.5%～15%, add high voltage flatbed material LiNi in the described active material
xCo
yMn
zOr LiNi
xCo
yAl
zElectrode is modified, and wherein X, Y, Z sum are 1.
2. the manufacture method of a kind of industrial accumulation energy type lithium battery pole slice according to claim 1 is characterized in that: material preparation and the coating procedure of described conductive layer are:
(1) take by weighing electrically conductive graphite and PVDF, place respectively vacuum drying oven, toasted 12～24 hours under 80～120 ℃ of temperature, equitemperature is down to 50 ℃ of taking-ups after the baking;
(2) PVDF that drying is good adds nmp solvent, and the two mass ratio of front and back is 1:(5～20), the rotating speed with 25～40Hz in Vacuum mixer stirred 5～10 hours, made the PVDF slurry;
(3) electrically conductive graphite that drying is good adds the PVDF slurry again, and the rotating speed with 15～25Hz in vacuum stirring equipment stirred 5～10 hours, stir finish with-0.075Mpa～-vacuum keep 25～35min of 0.085Mpa processing of cooling down;
(4) at last usefulness printing coating machine is coated on the collector by the material that makes more than the pressing method general, and the material single face surface density of coating is 1～1.5g/ ㎡, and thickness is 1～5 μ m after the roll-in.
3. the manufacture method of a kind of industrial accumulation energy type lithium battery pole slice according to claim 1, it is characterized in that: each component of described active material and mass percent are: LiFePO4 75%～96%, high voltage flatbed material 0.5%～15%, PVDF2.5%～15%.
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| CN2012103957896A CN102903892A (en) | 2012-10-18 | 2012-10-18 | Method for manufacturing industrial energy storage type lithium battery pole piece |
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| CN2012103957896A CN102903892A (en) | 2012-10-18 | 2012-10-18 | Method for manufacturing industrial energy storage type lithium battery pole piece |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928657A (en) * | 2014-04-30 | 2014-07-16 | 泉州劲鑫电子有限公司 | High-power lithium ion battery pole piece and preparation process thereof |
| CN105470526A (en) * | 2015-12-23 | 2016-04-06 | 山东精工电子科技有限公司 | Lithium battery anode current collector surface treatment method |
| CN108155340A (en) * | 2017-12-12 | 2018-06-12 | 江苏双登富朗特新能源有限公司 | The external conductive layer component of commercial lithium-ion battery plus plate current-collecting body and preparation method |
| CN108767193A (en) * | 2018-06-06 | 2018-11-06 | 江苏卓高新材料科技有限公司 | Anode and lithium battery containing low swelling equadag coating |
| CN108807901A (en) * | 2018-06-11 | 2018-11-13 | 四会市恒星智能科技有限公司 | The compound negative material of lithium ion battery |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101299470A (en) * | 2008-05-16 | 2008-11-05 | 东莞新能源科技有限公司 | Lithium ion battery |
| US20110269017A1 (en) * | 2009-01-26 | 2011-11-03 | Hiroyuki Sakamoto | Positive electrode for lithium secondary batteries and use thereof |
| CN102420315A (en) * | 2011-11-30 | 2012-04-18 | 南京双登科技发展研究院有限公司 | Method for manufacturing negative electrode of lithium titanate battery |
| CN102593413A (en) * | 2012-01-16 | 2012-07-18 | 浙江超威创元实业有限公司 | Manufacturing method of pole piece for improving current density |
-
2012
- 2012-10-18 CN CN2012103957896A patent/CN102903892A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299470A (en) * | 2008-05-16 | 2008-11-05 | 东莞新能源科技有限公司 | Lithium ion battery |
| US20110269017A1 (en) * | 2009-01-26 | 2011-11-03 | Hiroyuki Sakamoto | Positive electrode for lithium secondary batteries and use thereof |
| CN102420315A (en) * | 2011-11-30 | 2012-04-18 | 南京双登科技发展研究院有限公司 | Method for manufacturing negative electrode of lithium titanate battery |
| CN102593413A (en) * | 2012-01-16 | 2012-07-18 | 浙江超威创元实业有限公司 | Manufacturing method of pole piece for improving current density |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928657A (en) * | 2014-04-30 | 2014-07-16 | 泉州劲鑫电子有限公司 | High-power lithium ion battery pole piece and preparation process thereof |
| CN105470526A (en) * | 2015-12-23 | 2016-04-06 | 山东精工电子科技有限公司 | Lithium battery anode current collector surface treatment method |
| CN108155340A (en) * | 2017-12-12 | 2018-06-12 | 江苏双登富朗特新能源有限公司 | The external conductive layer component of commercial lithium-ion battery plus plate current-collecting body and preparation method |
| CN108767193A (en) * | 2018-06-06 | 2018-11-06 | 江苏卓高新材料科技有限公司 | Anode and lithium battery containing low swelling equadag coating |
| CN108807901A (en) * | 2018-06-11 | 2018-11-13 | 四会市恒星智能科技有限公司 | The compound negative material of lithium ion battery |
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Application publication date: 20130130 |