CN101388474A - Lithium manganate cell - Google Patents
Lithium manganate cell Download PDFInfo
- Publication number
- CN101388474A CN101388474A CNA2008101435414A CN200810143541A CN101388474A CN 101388474 A CN101388474 A CN 101388474A CN A2008101435414 A CNA2008101435414 A CN A2008101435414A CN 200810143541 A CN200810143541 A CN 200810143541A CN 101388474 A CN101388474 A CN 101388474A
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- China
- Prior art keywords
- electrolyte
- lithium manganese
- limn2o4
- lithium manganate
- libob
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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 relates to a lithium manganese cell, which comprises an anode, electrolyte and a cathode, wherein the anode is formed by components (mass percentage) which are 94-98.4% lithium manganese, 1-2% alkaline matters, 0.5-2% LiF or LiOH and 0.1-2% nanometer carbon fiber, and the electrolyte salt of the electrolyte is formed by 70-99% LiPF6 and 1-30% LiBOB. Since alkaline matters such as LiOH, MgO, CaO and Li2CO3 are added in lithium manganese, and LiBOB is added in electrolyte to be electrolytes, which not only can effectively lower the content of HF in electrolyte, reduce the dissolution of lithium manganese, improve the gram capacity of LiMn2O4 and the energy density of the lithium manganese cell, but also can inhibit the reaction of LiMn2O4 and HF, keep excellent spinel structure of LiMn2O4, thereby improving the cycle performance of the lithium manganese cell. The invention has low production cost, which can effectively improve the cycle performance, the energy density and the gram capacity of the lithium manganese cell, can achieve industrial production, and can totally replace the existing lithium manganese cells.
Description
Technical field
The present invention relates to technical field of lithium-ion battery, be meant the lithium manganate battery that a kind of cycle performance is good especially, belong to electrochemical field.
Background technology
Energy crisis, shortage of resources, environmental pollution be human survival face sternly complete challenge, seeking secondary energy sources clean, renewable, resource-conserving is the task of realizing that human social needs to be resolved hurrily.
Lithium ion battery have operating voltage height, energy density big, have extended cycle life, advantages such as self-discharge rate is little, environmental protection, become the trend of secondary cell development.The power supply that has been widely used in portable electricity consuming productses such as wireless telecommunications, digital camera, notebook computer, and having broad application prospects aspect the special application field power supplys such as Aero-Space, defence and military, field work, submarine.
And present most popular anode material for lithium-ion batteries is LiCoO
2, still, LiCoO
2Also exist and cost an arm and a leg, poor stability is to shortcoming such as environment is unfriendly.LiMn
2O
4Because its low price is environmentally friendly, advantage such as fail safe is good is considered as one of the most rising positive electrode by people.Application prospect is especially arranged on power-type lithium ion battery.
It is poor that but LiMn2O4 also exists cyclical stability, and particularly at high temperature, the circulation volume attenuation ratio is more serious.This also restricts the bottleneck of lithium manganate battery large-scale application just always.The cycle performance of present commercial LiMn2O4 has had certain improvement, but because industrialization, improvement still not ideal enough.Therefore in lithium manganate battery manufacturing process, how to improve cycle performance of battery in the mangaic acid, just seem particularly important.
Reason about lithium manganate battery cycle performance difference mainly is summed up as the dissolving of positive-material lithium manganate at present, and the irreversible transition of the positive active material that causes thus.Not present domestic also not seeing about make the report that improves the lithium manganate battery cycle performance by battery.The J.Power Sources of external Holland, 166 (2007) 219-225, the ZrO of the interpolation 2% in blending process of having reported for work improves the cycle performance of lithium manganate battery.But add the price height of ZrO, be unfavorable for large-scale promotion, and addition is big, can not improve the gram volume of LiMn2O4, influenced the lithium manganate battery energy density.It improves effect is not obvious especially.
Summary of the invention
The objective of the invention is to overcome the deficiency of existing lithium manganate battery cycle performance difference and provide that a kind of component is reasonable, production cost is low, can effectively improve the lithium manganate battery of lithium manganate battery cycle performance.
The present invention---a kind of lithium manganate battery comprises positive pole, electrolyte, negative pole, and described positive pole is formed (mass percent) by 94-98.4% LiMn2O4,1-2% alkaline matter, 0.5-2% LiF or LiOH, 0.1-2% carbon nano-fiber component; The electrolytic salt of described electrolyte is by 70-99%LiPF
6, 1-30%LiBOB forms.
Among the present invention, described positive pole is formed (mass percent) by 95-97.5% LiMn2O4,1.3-1.7% alkaline matter, 1.0-1.5% LiF or LiOH, 0.5-1.5% carbon nano-fiber component; The electrolytic salt of described electrolyte is by 80-90%LiPF
6, 10-20%LiBOB forms.
Among the present invention, described positive pole is formed (mass percent) by 96.5% LiMn2O4,1.5% alkaline matter, 1.3%LiF or LiOH, 1.0% carbon nano-fiber component; The electrolytic salt of described electrolyte is by 85%LiPF
6, 15%LiBOB forms.
Among the present invention, described alkaline matter is MgO, CaO and Li
2CO
3In one or more compositions.
Lithium ion cell positive production technology according to routine, with mixed preparing form slurry such as binding agent, conductive agent, additive, solvents, through coating, dry, roll film, cut and be made into based lithium-ion battery positive plate, assemble with negative plate, barrier film, electrolyte, battery case, after discharging and recharging activation, obtain LiMn2O4 electrokinetic cell of the present invention.
The present invention has the following advantages and good effect:
1 improves LiMn
2O
4Gram volume
The present invention is owing to add LiOH in LiMn2O4, and adds MgO, CaO and Li in blending process
2CO
3Deng alkaline matter, these additives are distributed in the positive electrode fully, and in electrolyte, add LiBOB as electrolyte; Reduce the amount that HF produces in the electrolyte, the MgO that is added, CaO, LiOH and Li on the other hand on the one hand effectively
2CO
3Can be effectively and the HF reaction that generates of electrolyte Deng alkaline matter, suppressed positive active material LiMn
2O
4With the reaction of HF, reduce the dissolving of LiMn2O4, thereby improve LiMn
2O
4Gram volume, and then improve the energy density of lithium manganate battery.
2 improve the cycle performance of lithium manganate battery
The present invention is owing to add LiOH in LiMn2O4, and adds MgO, CaO and Li in blending process
2CO
3Deng alkaline matter, and adopt and add LiBOB, not only can reduce the content of HF in the electrolyte effectively, and can suppress positive active material LiMn as electrolyte solution
2O
4With the reaction of HF, keep LiMn
2O
4Good spinel structure, and then help improving the cycle performance of lithium manganate battery.
In sum, the present invention---a kind of lithium manganate battery has the cycle performance that production cost is low, can effectively improve lithium manganate battery, improves the energy density and the gram volume of lithium manganate battery; Can realize industrialized production, fully alternative existing lithium manganate battery.
Description of drawings:
Accompanying drawing 1 is LiMn of the present invention
2O
4With common LiMn
2O
4The comparison diagram of gram volume.
Accompanying drawing 2 is LiMn of the present invention
2O
4Battery and common LiMn
2O
4The cycle performance comparison diagram of battery.
Accompanying drawing 3 is Different L iMn
2O
4Gram volume before and after the battery circulation.
Among Fig. 1: 1---is the LiMn of the embodiment of the invention 2
2O
4The gram volume curve; 2---is common LiMn
2O
4The gram volume curve.
Among Fig. 2: the LiMn of the 3---embodiment of the invention 2
2O
4The cycle performance curve of battery; 4---is common LiMn
2O
4The cycle performance curve of battery.
Embodiment:
Get 94 the gram LiMn2O4s, 2 the gram MgO, 2 the gram LiF, 2 the gram carbon nano-fibers fully mix, lithium ion cell positive production technology according to routine, with mixed preparing form slurry such as binding agent, conductive agent, additive, solvents, through coating, dry, roll film, cut and be made into based lithium-ion battery positive plate, the electrolytic salt of electrolyte adopts 10% LiBOB to add 90% LiPF
6Make flow process according to conventional lithium-ion-power cell then, obtain LiMn2O4 electrokinetic cell of the present invention.
Get 96 the gram LiMn2O4s, 1.5 the gram CaO, 1.5 the gram LiOH, 1 the gram carbon nano-fiber fully mix, lithium ion cell positive production technology according to routine, with mixed preparing form slurry such as binding agent, conductive agent, additive, solvents, through coating, dry, roll film, cut and be made into based lithium-ion battery positive plate, the electrolytic salt of electrolyte adopts 20% LiBOB to add 80% LiPF
6Make flow process according to conventional lithium-ion-power cell then, obtain LiMn2O4 electrokinetic cell of the present invention.
Get 98.4 gram LiMn2O4s, 1 gram Li
2CO
3, 0.5 the gram LiOH, 0.1 the gram carbon nano-fiber fully mix, lithium ion cell positive production technology according to routine, with mixed preparing form slurry such as binding agent, conductive agent, additive, solvents, through coating, dry, roll film, cut and be made into based lithium-ion battery positive plate, the electrolytic salt of electrolyte adopts 30% LiBOB to add 70% LiPF
6Make flow process according to conventional lithium-ion-power cell then, obtain LiMn2O4 electrokinetic cell of the present invention.
Get 97.4 the gram LiMn2O4s, 1 the gram CaO, 0.8 the gram LiF, 0.8 the gram carbon nano-fiber fully mix, lithium ion cell positive production technology according to routine, with mixed preparing form slurry such as binding agent, conductive agent, additive, solvents, through coating, dry, roll film, cut and be made into based lithium-ion battery positive plate, the electrolytic salt of electrolyte adopts 25% LiBOB to add 75% LiPF
6Make flow process according to conventional lithium-ion-power cell then, obtain LiMn2O4 electrokinetic cell of the present invention.
Embodiment 5
Get 95 gram LiMn2O4s, 1.5 gram Li
2CO
3, 2 the gram LiF, 1.5 the gram carbon nano-fibers fully mix, lithium ion cell positive production technology according to routine, with mixed preparing form slurry such as binding agent, conductive agent, additive, solvents, through coating, dry, roll film, cut and be made into based lithium-ion battery positive plate, the electrolytic salt of electrolyte adopts 15% LiBOB to add 85% LiPF
6Make flow process according to conventional lithium-ion-power cell then, obtain LiMn2O4 electrokinetic cell of the present invention.
Claims (4)
1, a kind of lithium manganate battery comprises positive pole, electrolyte, negative pole, and described positive pole is formed (mass percent) by 94-98.4% LiMn2O4,1-2% alkaline matter, 0.5-2%LiF or LiOH, 0.1-2% carbon nano-fiber component; The electrolytic salt of described electrolyte is by 70-99%LiPF
6, 1-30%LiBOB forms.
2, a kind of lithium manganate battery according to claim 1, described positive pole is formed (mass percent) by 95-97.5% LiMn2O4,1.3-1.7% alkaline matter, 1.0-1.5%LiF or LiOH, 0.5-1.5% carbon nano-fiber component; The electrolytic salt of described electrolyte is made up of 80-90%LiPF6,10-20%LiBOB.
3, a kind of lithium manganate battery according to claim 2, described positive pole is formed (mass percent) by 96.5% LiMn2O4,1.5% alkaline matter, 1.3%LiF or LiOH, 1.0% carbon nano-fiber component; The electrolytic salt of described electrolyte is by 85%LiPF
6, 15%LiBOB forms.
4, according to claim 1,2 or 3 described a kind of lithium manganate batteries, described active alkaline matter is MgO, CaO and Li
2CO
3In one or more compositions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101435414A CN101388474A (en) | 2008-11-07 | 2008-11-07 | Lithium manganate cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101435414A CN101388474A (en) | 2008-11-07 | 2008-11-07 | Lithium manganate cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101388474A true CN101388474A (en) | 2009-03-18 |
Family
ID=40477738
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|---|---|---|---|
| CNA2008101435414A Pending CN101388474A (en) | 2008-11-07 | 2008-11-07 | Lithium manganate cell |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280641A (en) * | 2011-06-27 | 2011-12-14 | 东莞新能源科技有限公司 | Secondary lithium battery and cathode sheet thereof |
| CN102306830A (en) * | 2011-08-20 | 2012-01-04 | 珠海锂源新能源科技有限公司 | Nickel-cobalt lithium manganate and lithium titanate system lithium ion battery with high-performance electrolyte solution |
| CN102306829A (en) * | 2011-08-20 | 2012-01-04 | 珠海锂源新能源科技有限公司 | Lithium manganate and lithium titanate system lithium ion battery with high-performance electrolyte solution |
| CN102544507A (en) * | 2011-12-23 | 2012-07-04 | 多氟多（焦作）新能源科技有限公司 | Lithium ion power battery positive plate and lithium ion power battery |
| CN103633328A (en) * | 2012-08-24 | 2014-03-12 | 中国科学院上海微系统与信息技术研究所 | Lithium ion battery ternary positive plate containing weakly-alkaline metallic compound and manufacturing method thereof |
| CN104269549A (en) * | 2014-09-04 | 2015-01-07 | 江苏大学 | Lithium manganate battery |
| CN105489882A (en) * | 2016-01-14 | 2016-04-13 | 北京鼎能开源电池科技股份有限公司 | Positive pole piece, preparation method thereof and lithium ion battery |
| CN107331894A (en) * | 2017-06-20 | 2017-11-07 | 成都新柯力化工科技有限公司 | A kind of lithium battery electrolytes microcapsules control acid additive and preparation method |
| CN107910587A (en) * | 2017-12-08 | 2018-04-13 | 广州天赐高新材料股份有限公司 | Lithium secondary cell electrolyte and lithium secondary battery |
| CN107919500A (en) * | 2016-10-05 | 2018-04-17 | 丰田自动车株式会社 | The manufacture method of lithium rechargeable battery |
| CN113321485A (en) * | 2021-05-28 | 2021-08-31 | 中南大学 | Preparation method of chalcogenide solid electrolyte |
| CN114933332A (en) * | 2022-06-06 | 2022-08-23 | 安徽博石高科新材料股份有限公司 | Method for producing lithium manganate by composite raw materials |
-
2008
- 2008-11-07 CN CNA2008101435414A patent/CN101388474A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280641A (en) * | 2011-06-27 | 2011-12-14 | 东莞新能源科技有限公司 | Secondary lithium battery and cathode sheet thereof |
| CN102306830A (en) * | 2011-08-20 | 2012-01-04 | 珠海锂源新能源科技有限公司 | Nickel-cobalt lithium manganate and lithium titanate system lithium ion battery with high-performance electrolyte solution |
| CN102306829A (en) * | 2011-08-20 | 2012-01-04 | 珠海锂源新能源科技有限公司 | Lithium manganate and lithium titanate system lithium ion battery with high-performance electrolyte solution |
| CN102306830B (en) * | 2011-08-20 | 2014-06-25 | 珠海锂源新能源科技有限公司 | Nickel-cobalt lithium manganate and lithium titanate system lithium ion battery with high-performance electrolyte solution |
| CN102306829B (en) * | 2011-08-20 | 2014-09-03 | 珠海锂源新能源科技有限公司 | Lithium manganate and lithium titanate system lithium ion battery with high-performance electrolyte solution |
| CN102544507A (en) * | 2011-12-23 | 2012-07-04 | 多氟多（焦作）新能源科技有限公司 | Lithium ion power battery positive plate and lithium ion power battery |
| CN102544507B (en) * | 2011-12-23 | 2014-07-02 | 多氟多（焦作）新能源科技有限公司 | Lithium ion power battery positive plate and lithium ion power battery |
| CN103633328A (en) * | 2012-08-24 | 2014-03-12 | 中国科学院上海微系统与信息技术研究所 | Lithium ion battery ternary positive plate containing weakly-alkaline metallic compound and manufacturing method thereof |
| CN104269549A (en) * | 2014-09-04 | 2015-01-07 | 江苏大学 | Lithium manganate battery |
| CN105489882A (en) * | 2016-01-14 | 2016-04-13 | 北京鼎能开源电池科技股份有限公司 | Positive pole piece, preparation method thereof and lithium ion battery |
| CN107919500A (en) * | 2016-10-05 | 2018-04-17 | 丰田自动车株式会社 | The manufacture method of lithium rechargeable battery |
| CN107919500B (en) * | 2016-10-05 | 2020-03-27 | 丰田自动车株式会社 | Method for manufacturing lithium ion secondary battery |
| CN107331894A (en) * | 2017-06-20 | 2017-11-07 | 成都新柯力化工科技有限公司 | A kind of lithium battery electrolytes microcapsules control acid additive and preparation method |
| CN107331894B (en) * | 2017-06-20 | 2019-07-19 | 成都新柯力化工科技有限公司 | A kind of lithium battery electrolytes microcapsules control acid additive and preparation method |
| CN107910587A (en) * | 2017-12-08 | 2018-04-13 | 广州天赐高新材料股份有限公司 | Lithium secondary cell electrolyte and lithium secondary battery |
| CN113321485A (en) * | 2021-05-28 | 2021-08-31 | 中南大学 | Preparation method of chalcogenide solid electrolyte |
| CN114933332A (en) * | 2022-06-06 | 2022-08-23 | 安徽博石高科新材料股份有限公司 | Method for producing lithium manganate by composite raw materials |
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Open date: 20090318 |