CN101257132A - Lithium ion electrolytic solution preventing over charge and lithium ion battery made therefrom - Google Patents
Lithium ion electrolytic solution preventing over charge and lithium ion battery made therefrom Download PDFInfo
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- CN101257132A CN101257132A CNA2008100200996A CN200810020099A CN101257132A CN 101257132 A CN101257132 A CN 101257132A CN A2008100200996 A CNA2008100200996 A CN A2008100200996A CN 200810020099 A CN200810020099 A CN 200810020099A CN 101257132 A CN101257132 A CN 101257132A
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- lithium ion
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- overcharge
- imidodicarbonic diamide
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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
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Abstract
The invention discloses a durable overcharge lithium ion electrolyte with excellent anti-overcharge characteristic and a lithium battery using the same. Said durable overcharge lithium ion electrolyte contains an additive shown as right structure formulation, and weight rate of the additive in the lithium ion electrolyte is 0.01%-33.6%; in right structure formulation, X, Y, Z come from alkyl, alkoxy, aryl group, hydroxy, carboxyl, aether-oxyl or halogen with carbon atom between 0-12. The lithium ion battery can be prepared by using the durable overcharge lithium ion electrolyte. The additive added to the lithium ion electrolyte can increase durable overcharge property of the electrolyte efficiently, increase charge/discharge cycle efficiency, hardly effects normal property of the lithium ion battery and perfectly satisfy application need.
Description
Technical field
The present invention relates to the lithium ion battery field, refer more particularly to a kind of anti-overcharge lithium-ion electrolyte and lithium ion battery prepared therefrom.
Background technology
Limited along with the increase of people's environmental consciousness and earth resource forces people to improve utilance to resource, and the advantage of secondary cell makes it become one of strong candidate.Energy density height, specific power are big because lithium ion battery has, good cycle, memory-less effect, characteristics such as pollution-free, lithium ion battery is well utilized in various electronic products such as mobile phone, mobile phone, mobile camera, notebook computer, and it also is the ideal selection of the energy of electric motor car in the future simultaneously.But safety problem is that large-scale lithium ion battery can't business-like maximum the obstruction.Danger such as many explosions, on fire, blast all are to cause owing to overcharging of lithium ion battery, and these all are because the out of control of cell voltage causes exothermic reaction to cause.In order to address these problems, traditional method is PTC terminal, gas expansion checkout gear, explosion relief valve to be installed in the safety cap of battery or to be prevented overcharging of battery by adding special-purpose overcharge protection circuit.But these methods have increased battery cost and complexity, and safe effect neither be very desirable.Realize that by additive the over-charging of battery internal protection just solves these problems.The kind of additive is confined to derivative and the ferrocene and the derivative thereof of biphenyl, cyclohexylbenzene, halobenzene (bromobenzene, chlorobenzene), furans substantially, because after adding such additive, can have influence on the normal charging and discharging capabilities of battery, influence its cycle efficieny, configuration of surface to battery material has certain negative effect simultaneously, battery has produced a large amount of gas in charging and discharging process, thereby makes cell expansion cause the decreased performance of lithium ion battery.
Summary of the invention
A technical problem to be solved by this invention is: a kind of, anti-overcharge lithium-ion electrolyte that overcharging resisting performance good very little to the lithium ion battery performance impact will be provided.Another technical problem to be solved by this invention is: will provide a kind of overcharging resisting performance good lithium ion battery.
For solving above-mentioned first problem, the technical solution used in the present invention is: described anti-overcharge lithium-ion electrolyte, be characterized in: contain the additive that useful following structural formula is represented in the described lithium-ion electrolyte, and this additive shared part by weight in lithium-ion electrolyte is: 0.01%-33.6%;
In the said structure formula, X, Y, Z are selected from alkyl, alkoxyl, aromatic group, hydroxyl, carboxyl, ether oxygen base or the halogen of carbon atom between 0～12 respectively.
Above-mentioned additive is selected from least a in the following material: N-phenyl imidodicarbonic diamide, N-perfluorophenyl imidodicarbonic diamide, N-toluene imidodicarbonic diamide, trimethylbenzene imidodicarbonic diamide between N-, the adjacent trimethylbenzene imidodicarbonic diamide of N-, the 3-tert-butyl group-4-methyl isophthalic acid-meta-xylene imidodicarbonic diamide, 3, trimethylbenzene imidodicarbonic diamide between 4-di-t-butyl-1-, 3, tri-butyl benzene imidodicarbonic diamide between 4-di-t-butyl-1-.
For solving above-mentioned second problem, the lithium ion battery that the present invention adopts anti-overcharge lithium-ion electrolyte recited above to prepare.
The invention has the beneficial effects as follows: in lithium-ion electrolyte, add described additive, can effectively improve the overcharging resisting performance of electrolyte, improve the cycle efficieny that discharges and recharges; Lithium ion battery by this anti-overcharge lithium-ion electrolyte prepares has possessed these advantages equally, influences the normal performance of lithium ion battery hardly, can satisfy the needs of application fully.And strong operability of the present invention, cost are low.
Description of drawings
Fig. 1 is that the lithium battery to embodiment 1 gained carries out the performance chart that 5V overcharges test;
Fig. 2 is that the lithium battery to the Comparative Examples gained carries out the performance chart that 5V overcharges test.
Embodiment
Below by specific embodiment and with the comparison of Comparative Examples, the invention will be further described.But protection scope of the present invention is not limited to these embodiment.
Embodiment 1:
With ethylene carbonate, dimethyl carbonate, Methylethyl carbonic ester mixed with 1: 1: 1, make it be formulated as the electrolyte of 1mol/L to wherein adding a certain amount of lithium hexafluoro phosphate, to wherein adding this additive N-phenyl imidodicarbonic diamide, make its dissolving prepare electrolyte of the present invention then.Weight with electrolyte is benchmark, and the composition of this additive is:
N-phenyl imidodicarbonic diamide 1wt.%.
Anodal preparation: with a certain amount of LiCoO
2Be dispersed in by Kynoar (PVDF) with acetylene black and be dissolved in the solvent in the N-N-methyl-2-2-pyrrolidone N-(NMP), obtain uniform slurry, apply with aluminium foil in 120 ℃ of vacuum, dry 12h, obtain anode pole piece after the calendering.
The preparation of negative pole: phase microballoon (CMS) in the middle of a certain amount of carbon and acetylene black is dispersed in by Kynoar (PVDF) is dissolved in the solvent in the N-N-methyl-2-2-pyrrolidone N-(NMP), obtain uniform slurry, in 120 ℃ of vacuum, dry 12h on coating and the Copper Foil, obtain cathode pole piece after the calendering.
The preparation of lithium ion battery: above-mentioned positive pole and cathode pole piece and celgand 2400 barrier films are assembled into button cell, and the resulting electrolyte with the front adds in this battery simultaneously, and sealing makes lithium ion battery.
Embodiment 2:
With ethylene carbonate, dimethyl carbonate, Methylethyl carbonic ester mixed with 1: 1: 1, make it be formulated as the electrolyte of 1mol/L to wherein adding a certain amount of lithium hexafluoro phosphate, to wherein adding additive, make its dissolving prepare electrolyte of the present invention then.Weight with electrolyte is benchmark, and the composition of this additive is:
N-phenyl imidodicarbonic diamide 3wt.%.
Prepare lithium rechargeable battery according to the electrolyte that the same procedure of embodiment 1 adopts present embodiment to obtain.
Embodiment 3:
With ethylene carbonate, dimethyl carbonate, Methylethyl carbonic ester mixed with 1: 1: 1, make it be formulated as the electrolyte of 1mol/L to wherein adding a certain amount of lithium hexafluoro phosphate, to wherein adding additive, make its dissolving prepare electrolyte of the present invention then.Weight with electrolyte is benchmark, and the composition of this additive is:
N-phenyl imidodicarbonic diamide 5wt.%.
Prepare lithium rechargeable battery according to the electrolyte that the same procedure of embodiment 1 adopts present embodiment to obtain.
Embodiment 4:
With ethylene carbonate, dimethyl carbonate, Methylethyl carbonic ester mixed with 1: 1: 1, make it be formulated as the electrolyte of 1mol/L to wherein adding a certain amount of lithium hexafluoro phosphate, to wherein adding additive, make its dissolving prepare electrolyte of the present invention then.Weight with electrolyte is benchmark, and the composition of this additive is:
3, trimethylbenzene imidodicarbonic diamide 1wt.% between 4-di-t-butyl-1-.
Prepare lithium rechargeable battery according to the electrolyte that the same procedure of embodiment 1 adopts present embodiment to obtain.
Embodiment 5:
With ethylene carbonate, dimethyl carbonate, Methylethyl carbonic ester mixed with 1: 1: 1, make it be formulated as the electrolyte of 1mol/L to wherein adding a certain amount of lithium hexafluoro phosphate, to wherein adding additive, make its dissolving prepare electrolyte of the present invention then.Weight with electrolyte is benchmark, and the composition of this additive is:
3, trimethylbenzene imidodicarbonic diamide 3wt.% between 4-di-t-butyl-1-.
Prepare lithium rechargeable battery according to the electrolyte that the same procedure of embodiment 1 adopts present embodiment to obtain.
Embodiment 6:
With ethylene carbonate, dimethyl carbonate, Methylethyl carbonic ester mixed with 1: 1: 1, make it be formulated as the electrolyte of 1mol/L to wherein adding a certain amount of lithium hexafluoro phosphate, to wherein adding additive, make its dissolving prepare electrolyte of the present invention then.Weight with electrolyte is benchmark, and the composition of this additive is:
3, trimethylbenzene imidodicarbonic diamide 5wt.% between 4-di-t-butyl-1-.
Prepare lithium rechargeable battery according to the electrolyte that the same procedure of embodiment 1 adopts present embodiment to obtain.
Comparative Examples:
With ethylene carbonate, dimethyl carbonate, Methylethyl carbonic ester mixed with 1: 1: 1, make its electrolyte that is formulated as 1mol/L to wherein adding a certain amount of lithium hexafluoro phosphate, make its dissolving prepare the electrolyte of this Comparative Examples.
Prepare lithium ion battery according to the electrolyte that the same procedure of embodiment 1 adopts this Comparative Examples to obtain.
[test of battery performance]
With the lithium ion battery of the above embodiments 1 and Comparative Examples gained, respectively it is carried out 5V and overcharge test, the result sees accompanying drawing 1 and accompanying drawing 2 respectively.
As can be seen among the embodiment the anti-overcharge performance of corresponding time in Comparative Examples, the electrode material surface form of embodiment 1 does not have destroyed, its charging/discharging voltage that overcharges is starkly lower than comparative example simultaneously, and its chemical property and comparative example are approaching, can satisfy the application need of lithium ion battery.
Claims (3)
1, a kind of anti-overcharge lithium-ion electrolyte is characterized in that: contain the additive that useful following structural formula is represented in the described lithium-ion electrolyte, and this additive shared part by weight in lithium-ion electrolyte is: 0.01%-33.6%;
In the said structure formula, X, Y, Z are selected from alkyl, alkoxyl, aromatic group, hydroxyl, carboxyl, ether oxygen base or the halogen of carbon atom between 0～12 respectively.
2, anti-overcharge lithium-ion electrolyte according to claim 1, it is characterized in that: described additive is selected from least a in the following material: N-phenyl imidodicarbonic diamide, N-perfluorophenyl imidodicarbonic diamide, N-toluene imidodicarbonic diamide, trimethylbenzene imidodicarbonic diamide between N-, the adjacent trimethylbenzene imidodicarbonic diamide of N-, the 3-tert-butyl group-4-methyl isophthalic acid-meta-xylene imidodicarbonic diamide, 3, trimethylbenzene imidodicarbonic diamide between 4-di-t-butyl-1-, 3, tri-butyl benzene imidodicarbonic diamide between 4-di-t-butyl-1-.
3, a kind of lithium ion battery by claim 1 or 2 described anti-overcharge lithium-ion electrolyte preparations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100200996A CN101257132A (en) | 2008-03-28 | 2008-03-28 | Lithium ion electrolytic solution preventing over charge and lithium ion battery made therefrom |
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| CNA2008100200996A CN101257132A (en) | 2008-03-28 | 2008-03-28 | Lithium ion electrolytic solution preventing over charge and lithium ion battery made therefrom |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931435A (en) * | 2012-10-23 | 2013-02-13 | 广州天赐高新材料股份有限公司 | Over-charging safety non-aqueous electrolyte for lithium ion battery |
| CN113036230A (en) * | 2021-03-18 | 2021-06-25 | 广东邦普循环科技有限公司 | Preparation method and application of lithium cobaltate soft package battery |
-
2008
- 2008-03-28 CN CNA2008100200996A patent/CN101257132A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931435A (en) * | 2012-10-23 | 2013-02-13 | 广州天赐高新材料股份有限公司 | Over-charging safety non-aqueous electrolyte for lithium ion battery |
| CN113036230A (en) * | 2021-03-18 | 2021-06-25 | 广东邦普循环科技有限公司 | Preparation method and application of lithium cobaltate soft package battery |
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Open date: 20080903 |