CN102364724A - Method for raising lithium manganate production capacity and compacted density of positive electrode in lithium manganate battery - Google Patents
Method for raising lithium manganate production capacity and compacted density of positive electrode in lithium manganate battery Download PDFInfo
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- CN102364724A CN102364724A CN2011103278833A CN201110327883A CN102364724A CN 102364724 A CN102364724 A CN 102364724A CN 2011103278833 A CN2011103278833 A CN 2011103278833A CN 201110327883 A CN201110327883 A CN 201110327883A CN 102364724 A CN102364724 A CN 102364724A
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- China
- Prior art keywords
- limn2o4
- lithium manganate
- sintering
- agglomerate
- production capacity
- 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.)
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- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000005245 sintering Methods 0.000 claims abstract description 36
- 239000011230 binding agent Substances 0.000 claims abstract description 10
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 230000000694 effects Effects 0.000 claims abstract description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 6
- 229910052808 lithium carbonate Inorganic materials 0.000 claims abstract description 5
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 claims description 49
- 150000001875 compounds Chemical class 0.000 claims description 8
- 229920002678 cellulose Polymers 0.000 claims description 7
- 239000001913 cellulose Substances 0.000 claims description 7
- 238000009530 blood pressure measurement Methods 0.000 claims description 5
- 238000007796 conventional method Methods 0.000 claims description 5
- 238000012216 screening Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 229910052593 corundum Inorganic materials 0.000 claims description 2
- 239000010431 corundum Substances 0.000 claims description 2
- -1 lithium carbonate compound Chemical class 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims 1
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract 3
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 abstract 1
- 239000001863 hydroxypropyl cellulose Substances 0.000 abstract 1
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 abstract 1
- 229940071676 hydroxypropylcellulose Drugs 0.000 abstract 1
- 238000007873 sieving Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 6
- 238000011161 development Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052493 LiFePO4 Inorganic materials 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- ADLSFYJDHWUKFP-UHFFFAOYSA-N 5-methoxy-11,12-dihydroindolo[2,3-a]carbazole-6-carbonitrile Chemical compound N1C2=C3NC4=CC=C[CH]C4=C3C(OC)=C(C#N)C2=C2[C]1C=CC=C2 ADLSFYJDHWUKFP-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000003746 solid phase reaction Methods 0.000 description 1
- 238000010671 solid-state reaction Methods 0.000 description 1
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
A method for raising the lithium manganate production capacity and the compacted density of a positive electrode in a lithium manganate battery. The technological steps contain: adding an organic binder hydroxypropyl-cellulose into a mixture of manganese dioxide and lithium carbonate, uniformly mixing, compacting into a lithium manganate lump, sintering, crushing the sintered lithium manganate lump, and sieving to obtain a lithium manganate product; compacting the lithium manganate product into a pole piece by a routine method, and making the lithium manganate pole piece into a 053048 aluminium shell effect battery by a routine method. By the steps of compacting the mixture into a lump and then sintering, the proportion of the sintered stockpile is raised by 31% than that of a mixture which dose not undergo compacting and sintering steps, the quality of the lithium manganate product is improved, and the porosity is reduced, thus raising the bulk energy density of the battery.
Description
Technical field
The invention belongs to the new energy materials preparing technical field, relate to a kind of method that improves anodal compacted density in LiMn2O4 production capacity and the lithium manganate battery.
Background technology
In recent years; Owing to reasons such as the energy crisis in the global range, air pollution, greenhouse effect, started the climax of a development new-energy automobile in the whole world, Chinese Government is determined very big on development new-energy automobile industry; A series of encouragement policies have been put into effect in succession; New-energy automobile has become the focus of automobile industry, and electrokinetic cell is as " heart " of new-energy automobile, its research and development with produce the most important thing that becomes the development new-energy automobile.CMIC scholarly forecast to 2012 year, China will form 500,000 new-energy automobile production capacities, form the automobile-used high energy monomer electrokinetic cell production capacity of 1,000,000,000 ampere-hours, and domestic automobile electrokinetic cell market scale can reach 10,000,000,000 yuan.
The key components positive electrode of lithium-ion-power cell is mainly LiMn2O4 and LiFePO4; Japan and Korea S are partial to use manganese system; Japan was in the production scale that constantly enlarges LiMn2O4 in recent years; It is reported that will reach 6700 tons/year to Nitto Denko Corp's LiMn2O4 total productive capacity in 2012, Japanese Toda Kogyo Corp. will reach 6500 tons/year.The U.S. is partial to iron system, but the research that has also strengthened the manganese based material in the recent period.LiFePO4 does not come into operation owing to cryogenic property and batch less stable at present as yet in large quantity, and LiMn2O4 is ripe more technically, has good cryogenic property and batch stability.
Domestic lithium manganate material is in Rapid development stage at present, and technology is in continuous progress, and performance is in continuous improvement, and production capacity is improving constantly, but developed country's ratios such as properties of product and Japan also have certain gap.Therefore; We must further absorb advanced foreign technology on existing basis, extensively collect the technical information of relevant lithium electricity industry both at home and abroad; Strengthen research and development capabilities; The new technology of exploitation autonomous innovation strives for bigger breakthrough being arranged reducing cost, improve aspect of performance, promotes the fast development of China's lithium electricity industry greatly.
At present, the method for domestic production LiMn2O4 nearly all is a powder sintering, and bulk density is little; The separate unit furnace output is low, and the material contact is not tight yet, and porosity is big; React insufficient between the material particle, the performance defectiveness, anodal compacted density also is difficult to improve in the lithium manganate battery.
Summary of the invention
It is simple and be prone to realize the method for anodal compacted density in raising LiMn2O4 production capacity that industrialization is produced and the lithium manganate battery that the technical problem that the present invention will solve provides a kind of technology.
The present invention solves the problems of the technologies described above with following technical scheme:
Method of the present invention comprises following each step:
(1) gets sintering preceding manganese dioxide and lithium carbonate compound, add the organic binder bond hydroxylated cellulose CMC of mass ratio 0.6-1.2%, mixing by the prescription mixing;
(2) compound that step (1) is made is packed in the mould of press;
(3) charged mould is put on the pressure measurement platform of press, with 300-600kg/cm
2Pressure is pressed into the LiMn2O4 agglomerate;
(4) the LiMn2O4 agglomerate that suppresses is put into the sintering furnace sintering, sintering temperature is 800-850 ℃, and sintering time is 10-15 hour;
(5) after sintering reaction finishes, the LiMn2O4 agglomerate that sinters is broken, analyze the sieve screening with 0.045mm, undersize is the LiMn2O4 product;
(6) the LiMn2O4 product is pressed into pole piece by conventional method, the pressure measurement real density;
(7) the LiMn2O4 pole piece is made 053048 aluminum hull actual effect battery and detected its capacity and fade performance by conventional method.
The mass ratio that adds organic binder bond hydroxylated cellulose CMC in the step (1) is 0.6-1.2%,
3-10 second pressing time in the step (3).
LiMn2O4 agglomerate length of side 20-50mm in the step (3).
LiMn2O4 agglomerate in the step (3) is best with ellipse.
The broken control granularity of the LiMn2O4 agglomerate that sinters in the step (5) is D50≤15 μ.
The LiMn2O4 agglomerate that sinters in the step (5) can be broken by the corundum twin rollers.
This method is the compound before the LiMn2O4 sintering to be pressed into agglomerate be put into and carry out sintering in the sintering furnace, because very tight through the material contact of the group of pressure, the sintering feed bulk density is by bringing up to 1.39 without 1.06 of the group's of pressure sintering; Improved 31%, corresponding furnace output can improve 31%, and power consumption and man-hour are almost constant; Promptly under the power consumption and the situation in man-hour much at one, the production capacity of LiMn2O4 can improve 31%, simultaneously; Also improved the high temperature solid state reaction dynamic conditions of storeroom greatly, help product crystal grain grow up and crystalline form perfect, make the quality of LiMn2O4 product be improved; Porosity reduces; Anodal compacted density is brought up to more than 3.00 by about 2.90 in the lithium manganate battery, and this helps improving the volume of battery energy density, has satisfied market demand.
Embodiment
Added the organic binder bond hydroxylated cellulose in the compound of the present invention before sintering; Can improve agglomerate intensity greatly; Guarantee that agglomerate do not pulverize in shipment; And the organic binder bond hydroxylated cellulose generates the gas phase volatilization when high temperature sintering, and can not remain in the LiMn2O4 product influences product quality.
The anti-broken ability that the pressure of compacting nodulizing and press time are determining agglomerate, not broken in transportation and charging process in order to ensure agglomerate, agglomerate must compress, and general pressure is 300-600kg/cm
2
Because agglomerate is sintering under solid phase, also do not form liquid-phase sintering, pulverize easily, pulverize material and analyze the sieve screening, control granularity D50≤15 μ through 0.045mm.
Sintering temperature and time are very big to the influence of LiMn2O4 product quality, and generally requiring sintering temperature is 800-850 ℃, and sintering time is 10-15 hour.
The present invention is pressed into pole piece with lithium manganate material, pressure measurement real density, its representativeness, good stability with the method for producing lithium manganate battery.053048 aluminum hull actual effect battery in the step (7) is to make by the lithium manganate battery production procedure of routine, can truly reflect the electrical property of LiMn2O4 agglomerate.
Embodiment 1
Getting bulk density from the LiMn2O4 production line is 1.06 the manganese dioxide and the compound 2000g of lithium carbonate; Add organic binder bond hydroxylated cellulose (being called for short CMC) 20g; Organic binder bond wiring solution-forming and compound are disperseed mixing, and the material that at every turn takes by weighing behind the 80 gram mixings is used 500kg/cm on press
2Pressure, press time 3 seconds, be pressed into the bulk of 30*40*40, surveying bulk density is 1.39, the output of kiln has correspondingly improved 31% like this; Agglomerate is put into the pushed bat kiln sintering, and sintering temperature is 840 ℃, and sintering time is 11h, behind the sintering agglomerate is pulverized, and with the screening of 0.045mm sub-sieve, minus mesh is the LiMn2O4 product.
By the old process of making lithium manganate battery, earlier the LiMn2O4 product is made pole piece, surveying its compacted density is 3.05g/cm
3, be about 2.90 and use the LiMn2O4 pole piece compacted density of conventional method preparation, i.e. the LiMn2O4 pole piece compacted density of the inventive method preparation has improved about 5.0%; LiMn2O4 pole piece with the inventive method preparation is made 053048 aluminum hull actual effect battery, detects its electrical property, detects through 50 charge and discharge cycles, and initial 1C discharge capacity is 108mAh/g, decays to 5.4%.Can satisfy customer requirement fully.
Embodiment 2
Get the compound 1000g of manganese dioxide and lithium carbonate from the LiMn2O4 production line, add organic binder bond hydroxylated cellulose 6g, organic binder bond wiring solution-forming and compound are disperseed mixing, take by weighing 80 material that restrain behind the mixings at every turn and on press, use 400kg/cm
2Pressure, press time 6 seconds, be pressed into the oval-shaped bulk that major axis is 50mm, surveying bulk density is 1.34, and agglomerate is put into the pushed bat kiln sintering; Sintering temperature is 810 ℃, and sintering time is 14h, behind the sintering agglomerate is pulverized; Analyze the sieve screening with 0.045mm, minus mesh is the LiMn2O4 product.
By the old process of making lithium manganate battery, at first the LiMn2O4 product is made pole piece, surveying its compacted density is 3.03g/cm
3, continue to make 053048 aluminum hull actual effect battery then, detect its electrical property, detect through 50 charge and discharge cycles, initial 1C discharge capacity is 106mAh/g, decays to 5.0%.Can satisfy customer requirement.
Claims (6)
1. method that improves anodal compacted density in LiMn2O4 production capacity and the lithium manganate battery is characterized in that processing step is:
(1) get sintering preceding manganese dioxide and lithium carbonate compound by the prescription mixing, the adding mass ratio is 0.6～1.2% organic binder bond hydroxylated cellulose CMC, mixing;
(2) compound that step (1) is made is packed in the mould of press;
(3) charged mould is put on the pressure measurement platform of press, with 300～600kg/cm
2Pressure is pressed into the LiMn2O4 agglomerate;
(4) the LiMn2O4 agglomerate that suppresses is put into the sintering furnace sintering, sintering temperature is 800～850 ℃, and sintering time is 10～15 hours;
(5) after sintering reaction finishes, the LiMn2O4 agglomerate that sinters is broken, analyze the sieve screening with 0.045mm, undersize is the LiMn2O4 product;
(6) the LiMn2O4 product is pressed into pole piece by conventional method, the pressure measurement real density;
(7) the LiMn2O4 pole piece is made 053048 aluminum hull actual effect battery and detected its capacity and fade performance by conventional method.
2. the method for anodal compacted density in raising LiMn2O4 production capacity as claimed in claim 1 and the lithium manganate battery is characterized in that 3～10 seconds pressing times in the step (3).
3. the method for anodal compacted density in raising LiMn2O4 production capacity as claimed in claim 1 and the lithium manganate battery is characterized in that the LiMn2O4 agglomerate length of side 20～50mm in the step (3).
4. the method for anodal compacted density in raising LiMn2O4 production capacity as claimed in claim 3 and the lithium manganate battery is characterized in that the LiMn2O4 agglomerate in the step (3) is best with ellipse.
5. the method for anodal compacted density in raising LiMn2O4 production capacity as claimed in claim 1 and the lithium manganate battery is characterized in that the broken control granularity of LiMn2O4 agglomerate that sinters in the step (5) is D50≤15 μ m.
6. the method for anodal compacted density in raising LiMn2O4 production capacity as claimed in claim 1 and the lithium manganate battery is characterized in that the LiMn2O4 agglomerate that sinters in the step (5) can be broken by the corundum twin rollers.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103278833A CN102364724A (en) | 2011-10-25 | 2011-10-25 | Method for raising lithium manganate production capacity and compacted density of positive electrode in lithium manganate battery |
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| CN2011103278833A CN102364724A (en) | 2011-10-25 | 2011-10-25 | Method for raising lithium manganate production capacity and compacted density of positive electrode in lithium manganate battery |
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| CN102364724A true CN102364724A (en) | 2012-02-29 |
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| CN2011103278833A Pending CN102364724A (en) | 2011-10-25 | 2011-10-25 | Method for raising lithium manganate production capacity and compacted density of positive electrode in lithium manganate battery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103466714A (en) * | 2013-09-16 | 2013-12-25 | 无锡晶石新型能源有限公司 | Method for producing lithium manganate |
| CN103618078A (en) * | 2013-09-16 | 2014-03-05 | 无锡晶石新型能源有限公司 | Lithium manganate production method |
| CN105914351A (en) * | 2016-04-14 | 2016-08-31 | 北京晶晶星科技有限公司 | Preparation method of spinel type lithium manganate or lithium nickel manganese oxide |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1490250A (en) * | 2002-10-18 | 2004-04-21 | 北京圣比和科技有限公司 | Preparing method for spinel potassium manganate as lithium ion battery anode of electric vehicle |
| CN101381108A (en) * | 2008-09-28 | 2009-03-11 | 江苏双登电源有限公司 | Method for synthesizing spherical lithium manganate |
-
2011
- 2011-10-25 CN CN2011103278833A patent/CN102364724A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1490250A (en) * | 2002-10-18 | 2004-04-21 | 北京圣比和科技有限公司 | Preparing method for spinel potassium manganate as lithium ion battery anode of electric vehicle |
| CN101381108A (en) * | 2008-09-28 | 2009-03-11 | 江苏双登电源有限公司 | Method for synthesizing spherical lithium manganate |
Non-Patent Citations (1)
| Title |
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| 《化学化工大辞典》编委会等: "《化学化工大辞典》", 31 January 2003, article "羧甲基纤维素", pages: 2205 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103466714A (en) * | 2013-09-16 | 2013-12-25 | 无锡晶石新型能源有限公司 | Method for producing lithium manganate |
| CN103618078A (en) * | 2013-09-16 | 2014-03-05 | 无锡晶石新型能源有限公司 | Lithium manganate production method |
| CN103466714B (en) * | 2013-09-16 | 2015-09-09 | 无锡晶石新型能源有限公司 | A kind of method of producing LiMn2O4 |
| CN105914351A (en) * | 2016-04-14 | 2016-08-31 | 北京晶晶星科技有限公司 | Preparation method of spinel type lithium manganate or lithium nickel manganese oxide |
| CN105914351B (en) * | 2016-04-14 | 2019-11-15 | 北京晶晶星科技有限公司 | A kind of preparation method of lithium manganate having spinel structure or nickel ion doped |
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Application publication date: 20120229 |