CN102315484A - Overcharge resistant electrolyte of polymer lithium ion battery - Google Patents
Overcharge resistant electrolyte of polymer lithium ion battery Download PDFInfo
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- CN102315484A CN102315484A CN201110252717A CN201110252717A CN102315484A CN 102315484 A CN102315484 A CN 102315484A CN 201110252717 A CN201110252717 A CN 201110252717A CN 201110252717 A CN201110252717 A CN 201110252717A CN 102315484 A CN102315484 A CN 102315484A
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- ion battery
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- electrolyte
- lithium ion
- overcharge
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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 an overcharge resistant electrolyte of a polymer lithium ion battery, comprising 100 weight portions of an electrolytic stock solution consisting of EC, EMC and DEC, 3-8 weight portions of aryl alkyl, 1-2 weight portions of PS, and 3-8 weight portions of VC. The polymer lithium ion battery prepared by using the overcharge resistant electrolyte disclosed in the invention has no producing smoke, no bursting into flames or exploding during overcharge, the current, voltage and temperature of the electrical core during overcharge are all in the range of safe values, so that the safety performance of the battery is greatly improved.
Description
Technical field
The present invention relates to the polymer Li-ion battery technical field, specifically a kind of anti-over-charging electrolyte of polymer Li-ion battery.
Background technology
Electrolyte is the important component part of polymer Li-ion battery; The electrolyte of wherein a kind of polymer Li-ion battery that industry is commonly used is made up of EC (ethylene carbonate), EMC (methyl ethyl carbonate), three kinds of materials of DEC (diethyl carbonate); The polymer Li-ion battery that uses this kind electrolyte can trouble free service in the normal voltage scope; But when occurring overcharging phenomenon above design voltage as if generation, it is very unstable that the performance of battery can become, and following phenomenon can occur:
1, the lithium Metal Deposition of electric in-core forms Li dendrite at anode.
2, cathode material becomes unstable.
3, heat release.
Reaction equation is:
Discharge charges normal and overcharges
Negative electrode: 2LiCoO2 2Li
1/2CoO2 2CoO2
Anode: C6 LiC6 LiC6+Li
Because Li dendrite is prone to cause the internal short-circuit of electric core, can produce big calorimetric, the instability of cathode material makes the electrolyte oxidation; Also can produce a large amount of heat, and in the process of overcharging, material expands; Barrier film is extruded causes short circuit, produce a large amount of heat, and these heat accumulations are difficult to come out fast at electric in-core; This can make commonly used and that have flammable electrolyte at present temperature increase greatly, and can burn even explosion phenomenon, has very big potential safety hazard.
Summary of the invention
To the deficiency and the defective of above prior art, the object of the present invention is to provide a kind of anti-over-charging electrolyte of polymer Li-ion battery.
The objective of the invention is through adopting following technical scheme to realize:
A kind of anti-over-charging electrolyte of polymer Li-ion battery; Comprise the electrolytic solution of forming by EC, EMC, DEC, form by the aryl alkane of per 100 parts of (weight) electrolytic solutions, 3～8 parts of (weight) molecular formula of adding
, the PS of 1～2 part of (weight) molecular formula
, the VC mixing of 3～8 parts of (weight) molecular formula
;
Said R is phenyl, phenylate base, xenyl, biphenyl ester group, triphenyl, halogenophenyl, halogeno-benzene ether, halogenated biphenyl base or halo triphenyl.
As optimal technical scheme of the present invention, the halogens of said halogenophenyl, halogeno-benzene ether, halogenated biphenyl base or halo triphenyl is F, Cl or Br, and halo is that a replacement, two replaces or three replacements.
Compared with prior art; With the polymer Li-ion battery of anti-over-charging electrolyte that the present invention was disclosed preparation when overcharging; Do not smolder, not on fire, do not explode, when overcharging the electricity core electric current, voltage, temperature all in the scope of safety value, improved the security performance of battery greatly.
Description of drawings
Below in conjunction with accompanying drawing and specific embodiment the present invention is described further:
Fig. 1 overcharges the electric current of test and the curve chart of time for the embodiment of the invention one.
Fig. 2 overcharges the voltage of test and the curve chart of time for the embodiment of the invention one.
Fig. 3 overcharges the curve chart of the temperature and time of test for the embodiment of the invention one.
Fig. 4 overcharges the electric current of test and the curve chart of time for the embodiment of the invention two.
Fig. 5 overcharges the voltage of test and the curve chart of time for the embodiment of the invention two.
Fig. 6 overcharges the curve chart of the temperature and time of test for the embodiment of the invention two.
Embodiment
The anti-over-charging electrolyte of polymer Li-ion battery; Mixed by electrolytic solution, aryl alkane, PS (propylene sulfite), VC (vinylene carbonate) and to form, each raw material weight ratio of components is: 100 parts of electrolytic solutions, 3～8 parts in aryl alkane, PS1～2 part, VC3～8 part.
Said electrolytic solution is made up of EC (ethylene carbonate), EMC (methyl ethyl carbonate), DEC (diethyl carbonate), and its weight ratio of components is a known technology, is not just giving unnecessary details at this.
The molecular formula of said aryl alkane is:
This R is phenyl, phenylate base, xenyl, biphenyl ester group, triphenyl, halogenophenyl, halogeno-benzene ether, halogenated biphenyl base or halo triphenyl.The halogens of said halogenophenyl, halogeno-benzene ether, halogenated biphenyl base or halo triphenyl is F, Cl or Br, and halo is that a replacement, two replaces or three replacements.
The molecular formula of said PS is:
The molecular formula of said VC is:
Embodiment one:
Preparation 200 g electrolytic solutions in the glove box of applying argon gas (H2O < 10ppm), each claims that the 100g electrolytic solution is placed in 2 and fluoridizes in the bottle, wherein the not doping of electrolytic solution in a bottle is prepared into polymer Li-ion battery with electrolytic solution; 100g electrolytic solution in another bottle adds 3g cyclohexyl benzene (in the aryl alkane a kind of), 1g PS, 3g VC, is prepared into polymer Li-ion battery with this electrolyte.Then, test the over-charging of two polymer Li-ion batteries respectively with 4A, 10V constant voltage.Wherein, on fire with the polymer Li-ion battery of electrolytic solution preparation.
See also Fig. 1 to Fig. 3; With the polymer Li-ion battery of the electrolyte preparation that added 3g cyclohexyl benzene, 1g PS, 3g VC overcharging during test process fills at 660S; Electric current≤the 4A of its electric core, voltage≤10V, temperature≤110 ℃, electric core can not take place on fire, the phenomenon of blast.
Embodiment two:
Preparation 200 g electrolytic solutions in the glove box of applying argon gas (H2O < 10ppm), each claims that the 100g electrolytic solution is placed in 2 and fluoridizes in the bottle, wherein the not doping of electrolytic solution in a bottle is prepared into polymer Li-ion battery with electrolytic solution; 100g electrolytic solution in another bottle adds 8g cyclohexyl benzene, 2g PS, 8g VC, is prepared into polymer Li-ion battery with this electrolyte.Then, test the over-charging of two polymer Li-ion batteries respectively with 50mA, 10V constant voltage.Wherein, on fire with the polymer Li-ion battery of electrolytic solution preparation.
See also Fig. 4 to Fig. 6;, with the polymer Li-ion battery of the electrolyte preparation that added 8g cyclohexyl benzene, 2g PS, 8g VC the overcharging in the test process of 88min, the electric current≤50MA of its electric core, voltage≤5V, temperature≤70 ℃; The electricity core can not take place on fire, the phenomenon of blast.
The above is merely preferred embodiment of the present invention, is not to be used for limiting practical range of the present invention; Every according to equivalence variation and modification that the present invention did, all covered by the scope of claims of the present invention.
Claims (2)
1. the anti-over-charging electrolyte of a polymer Li-ion battery; Comprise the electrolytic solution of forming by EC, EMC, DEC, it is characterized in that: form by the aryl alkane of per 100 parts of (weight) electrolytic solutions, 3～8 parts of (weight) molecular formula of adding
, the PS of 1～2 part of (weight) molecular formula
, the VC mixing of 3～8 parts of (weight) molecular formula
; Said R is phenyl, phenylate base, xenyl, biphenyl ester group, triphenyl, halogenophenyl, halogeno-benzene ether, halogenated biphenyl base or halo triphenyl.
2. the anti-over-charging electrolyte of a kind of polymer Li-ion battery according to claim 1; It is characterized in that: the halogens of said halogenophenyl, halogeno-benzene ether, halogenated biphenyl base or halo triphenyl is F, Cl or Br, and halo is that a replacement, two replaces or three replacements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110252717A CN102315484A (en) | 2011-08-30 | 2011-08-30 | Overcharge resistant electrolyte of polymer lithium ion battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110252717A CN102315484A (en) | 2011-08-30 | 2011-08-30 | Overcharge resistant electrolyte of polymer lithium ion battery |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1925206A (en) * | 2006-09-20 | 2007-03-07 | 广州市天赐高新材料科技有限公司 | Dynamic electrolyte for lithium ion battery |
| CN1961452A (en) * | 2004-05-28 | 2007-05-09 | 宇部兴产株式会社 | Nonaqueous electrolyte solution and lithium secondary battery using same |
| CN1971999A (en) * | 2005-11-24 | 2007-05-30 | 比亚迪股份有限公司 | Electrolytic solution, lithium ion battery containing the same and their preparation method |
| CN101202353A (en) * | 2006-12-14 | 2008-06-18 | 上海比亚迪有限公司 | Electrolytic solution of lithium ion secondary battery and battery containing the electrolytic solution |
| CN101394005A (en) * | 2007-09-20 | 2009-03-25 | 比亚迪股份有限公司 | Electrolysis liquid, lithium ionic cell containing the liquid and manufacturing method thereof |
-
2011
- 2011-08-30 CN CN201110252717A patent/CN102315484A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1961452A (en) * | 2004-05-28 | 2007-05-09 | 宇部兴产株式会社 | Nonaqueous electrolyte solution and lithium secondary battery using same |
| CN1971999A (en) * | 2005-11-24 | 2007-05-30 | 比亚迪股份有限公司 | Electrolytic solution, lithium ion battery containing the same and their preparation method |
| CN1925206A (en) * | 2006-09-20 | 2007-03-07 | 广州市天赐高新材料科技有限公司 | Dynamic electrolyte for lithium ion battery |
| CN101202353A (en) * | 2006-12-14 | 2008-06-18 | 上海比亚迪有限公司 | Electrolytic solution of lithium ion secondary battery and battery containing the electrolytic solution |
| CN101394005A (en) * | 2007-09-20 | 2009-03-25 | 比亚迪股份有限公司 | Electrolysis liquid, lithium ionic cell containing the liquid and manufacturing method thereof |
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Application publication date: 20120111 |