CN106450456A - High-rate lithium-ion battery electrolyte with high temperature resistance and battery containing high-rate lithium-ion battery electrolyte - Google Patents
High-rate lithium-ion battery electrolyte with high temperature resistance and battery containing high-rate lithium-ion battery electrolyte Download PDFInfo
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- CN106450456A CN106450456A CN201610930483.4A CN201610930483A CN106450456A CN 106450456 A CN106450456 A CN 106450456A CN 201610930483 A CN201610930483 A CN 201610930483A CN 106450456 A CN106450456 A CN 106450456A
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- Prior art keywords
- ion battery
- high temperature
- battery electrolyte
- lithium
- lithium ion
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0566—Liquid materials
- H01M10/0567—Liquid materials characterised by the additives
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0566—Liquid materials
- H01M10/0569—Liquid materials characterised by the solvents
-
- 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 high-rate lithium-ion battery electrolyte with high temperature resistance. The high-rate lithium-ion battery electrolyte is prepared from components in percentage by mass as follows: 14%-18% of lithium salt, 80%-85% of an organic solvent and 0.5%-5% of additives. According to the high-rate lithium-ion battery electrolyte with high temperature resistance, the problems of discharge safety performance and high storage thickness expanding rate of a high-rate battery in a high-temperature environment and the like are effectively solved, the high-temperature and high-rate cycle performance of the lithium battery is improved, and by means of a high-temperature-resistant solvent, the service life of the lithium battery performing high-rate charge-discharge cycles at the high temperature is greatly prolonged, and the high-temperature storage safety performance of the lithium battery is greatly improved.
Description
Technical field
The present invention relates to lithium-ion battery electrolytes field of material technology, more particularly, to a kind of high temperature resistant high multiplying power lithium ion
Battery electrolyte and the battery comprising it.
Background technology
Lithium battery has the advantages that capacity height, small volume, lightweight, extensively applies in a lot of industries.With science and technology
Development, high-rate lithium battery range of application is more and more extensive, such as：Aerospace model power supply, automobile starting power supply, electric tool,
Ups power etc..But during high-multiplying power discharge, battery-heating amount is also big, and battery temperature increases.Lithium ion battery is fitted at this stage
It is about -20 DEG C～55 DEG C with temperature range, when higher than 55 DEG C, inside battery electrolyte decomposition becomes gas to battery, causes battery
Bulging may even happen that burning or explodes, and seriously limits the range of application of battery.
Improving lithium ion battery security in high temperature environments is to save problem to be solved at present, especially high magnification electricity
The heat temperature resistant safe in pond.In terms of the high rate performance of lithium ion battery and high temperature safe performance, electrolyte is always its research
Direction.The main component of electrolyte is organic solvent, lithium salts and minimal amount of additive, these compositions under given conditions according to
Certain proportion is formulated.Common organic solvents are readily decomposed to organic steam at high temperature, thus safety failure.
Content of the invention
The technical problem to be solved is for above-mentioned the deficiencies in the prior art, provides a kind of high temperature resistant high magnification
Lithium-ion battery electrolytes and the battery comprising it.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：A kind of high temperature resistant high multiplying power lithium ion battery electrolysis
Liquid, is made up of the component of following mass percent：Lithium salts 14%-18%, organic solvent 80%-85% and additive 0.5%-
5%.
The invention has the beneficial effects as follows：A kind of high temperature resistant high multiplying power lithium ion battery electrolyte of the present invention, solves effectively
The problems such as high-multiplying-power battery electric discharge security performance in high temperature environments, the storage thickness bulging rate under hot environment of having determined is big,
Improve the high temperature high-multiplying power discharge specific capacity of lithium battery, by high temperature resistant type solvent, so that lithium battery carries out height at high temperature
The life-span of rate charge-discharge circulation is greatly improved, and the high temperature storage security performance of lithium battery also improves a lot simultaneously.
On the basis of technique scheme, the present invention can also do following improvement：
Further：Described additive is mixed by sulfurous propyl propionate and triflate.
The beneficial effect of above-mentioned further scheme is：New interpolation is mixed using described sulfurous propyl propionate with triflate
Agent, can make negative pole form the SEI film of densification, slow down SEI film and decompose destruction, prevent organic solvent molecule from entering negative pole graphite
Layer；Triflate can ionize out TFMS ion under high temperature in organic solvent, combines to form one with lithium ion
Plant resistant to elevated temperatures organic salt.
Further：In described additive, sulfurous propyl propionate is 1 with the mixing ratio of triflate:(1-4).
Further：Described lithium salts is lithium hexafluoro phosphate or LiBF4.
Further：Described organic solvent is uniformly mixed by diethyl carbonate, ethylene carbonate, propene carbonate.
The beneficial effect of above-mentioned further scheme is：By using above-mentioned high temperature resistant type solvent, so that lithium battery exists
The life-span carrying out high power charging-discharging circulation under high temperature is greatly improved, and the high temperature storage security performance of lithium battery also has simultaneously
Very big raising.
Further：In described organic solvent, diethyl carbonate, ethylene carbonate, propene carbonate are according to volume ratio 1:1:1
Uniformly mix.
Further：Described organic solvent is uniformly mixed by methyl ethyl carbonate, ethylene carbonate, propene carbonate.
The beneficial effect of above-mentioned further scheme is：By using above-mentioned high temperature resistant type solvent, so that lithium battery exists
The life-span carrying out high power charging-discharging circulation under high temperature is greatly improved, and the high temperature storage security performance of lithium battery also has simultaneously
Very big raising.
Further：In described organic solvent, methyl ethyl carbonate, ethylene carbonate, propene carbonate are according to volume ratio 1:1:1
Uniformly mix.
Present invention also offers a kind of cobalt acid lithium being made up of described high temperature resistant high multiplying power lithium ion battery electrolyte, nickel cobalt
LiMn2O4 or the two doping system are as the lithium ion battery of positive pole.
Brief description
Fig. 1 is the curve with charge and discharge cycles number of times for the battery capacity of the battery being made using the battery electrolyte of the present invention
Figure.
Specific embodiment
Below in conjunction with accompanying drawing, the principle of the present invention and feature are described, example is served only for explaining the present invention, and
Non- for limiting the scope of the present invention.
The present invention relates to a kind of high temperature resistant high multiplying power lithium ion battery electrolyte, by the component group of following mass percent
Become：Lithium salts 14%-18%, organic solvent 80%-85% and additive 0.5%-5%.
In the present invention, described additive is mixed by sulfurous propyl propionate and triflate.Using described sulfurous acid
Propyl ester mixes new additive with triflate, and negative pole can be made to form the SEI film of densification, slows down SEI film and decomposes destruction, prevents
Only organic solvent molecule enters negative pole graphite linings；Triflate can ionize out fluoroform sulphur under high temperature in organic solvent
Acid ion, combines to form a kind of resistant to elevated temperatures organic salt with lithium ion.
Preferably, in described additive, sulfurous propyl propionate is 1 with the mixing ratio of triflate:(1-4).
In the present invention, described lithium salts is lithium hexafluoro phosphate or LiBF4.
Preferably, described organic solvent is uniformly mixed by diethyl carbonate, ethylene carbonate, propene carbonate.Logical
Cross and adopt above-mentioned high temperature resistant type solvent, so that the life-span that lithium battery carries out high power charging-discharging circulation at high temperature obtains pole
Big improvement, the high temperature storage security performance of lithium battery also improves a lot simultaneously.
Preferably, in described organic solvent, diethyl carbonate, ethylene carbonate, propene carbonate are according to volume ratio 1:1:1
Uniformly mix.
Preferably, described organic solvent is uniformly mixed by methyl ethyl carbonate, ethylene carbonate, propene carbonate.Logical
Cross and adopt above-mentioned high temperature resistant type solvent, so that the life-span that lithium battery carries out high power charging-discharging circulation at high temperature obtains pole
Big improvement, the high temperature storage security performance of lithium battery also improves a lot simultaneously.
Preferably, in described organic solvent, methyl ethyl carbonate, ethylene carbonate, propene carbonate are according to volume ratio 1:1:1
Uniformly mix.
Specifically, in the present invention, carry out in moisture 0-3ppm, the glove box of below oxygen 5ppm, organic liquid
Water content be respectively less than 5ppm, the water content of solids is respectively less than 5ppm.
Embodiment one, sulfurous propyl propionate, triflate, lithium hexafluoro phosphate are dissolved in organic solvent, wherein, sulfurous
The mass fraction of propyl propionate, triflate, lithium hexafluoro phosphate and organic solvent is respectively 1%, 1%, 14% and 86%.
Wherein, described organic solvent has diethyl carbonate, ethylene carbonate, propene carbonate is 1 according to volume ratio:1:1
Uniformly mix.
Embodiment two, sulfurous propyl propionate, triflate, lithium hexafluoro phosphate are dissolved in organic solvent, wherein, sulfurous
The mass fraction of propyl propionate, triflate, lithium hexafluoro phosphate and organic solvent is respectively 0.5%, 1%, 14.5% and
86%.
Wherein, described organic solvent has diethyl carbonate, ethylene carbonate, propene carbonate is 1 according to volume ratio:1:1
Uniformly mix.
Embodiment three, sulfurous propyl propionate, triflate, lithium hexafluoro phosphate are dissolved in organic solvent, wherein, sulfurous
The mass fraction of propyl propionate, triflate, lithium hexafluoro phosphate and organic solvent is respectively 1%, 2%, 16% and 81%.
Wherein, described organic solvent has diethyl carbonate, ethylene carbonate, propene carbonate is 1 according to volume ratio:1:1
Uniformly mix.
Example IV, sulfurous propyl propionate, triflate, LiBF4 are dissolved in organic solvent, wherein, sulfurous
The mass fraction of propyl propionate, triflate, lithium hexafluoro phosphate and organic solvent is respectively 0.5%, 1%, 16% and
82.5%.
Wherein, described organic solvent has diethyl carbonate, ethylene carbonate, propene carbonate is 1 according to volume ratio:1:1
Uniformly mix.
Embodiment five, sulfurous propyl propionate, triflate, LiBF4 are dissolved in organic solvent, wherein, sulfurous
The mass fraction of propyl propionate, triflate, lithium hexafluoro phosphate and organic solvent is respectively 1%, 2%, 15% and 82%.
Wherein, described organic solvent has diethyl carbonate, ethylene carbonate, propene carbonate is 1 according to volume ratio:1:1
Uniformly mix.
Embodiment six, sulfurous propyl propionate, triflate, LiBF4 are dissolved in organic solvent, wherein, sulfurous
The mass fraction of propyl propionate, triflate, lithium hexafluoro phosphate and organic solvent is respectively 1%, 1%, 14% and 84%.
Wherein, described organic solvent has diethyl carbonate, ethylene carbonate, propene carbonate is 1 according to volume ratio:1:1
Uniformly mix.
Advantage electrolyte of the present invention being described below by way of contrast test.
The battery of this test is the positive pole system of nickle cobalt lithium manganate, and the battery size of making is that INP803665-H is (specified
Capacity 1500mAh, 20C multiplying power) battery is filled with 1C, 4.2V constant current constant voltage mode by high multiplying polymer battery in normal temperature environment
Full electricity.85 DEG C of storages of high temperature measured its voltage, internal resistance, thickness data after 4 hours.Test result is as shown in table 1, wherein example 1-6
It is respectively the battery that the electrolyte described in embodiment of the present invention 1-6 makes, example 7 is existing conventional electrolysis liquid.Fig. 1 is above-mentioned electricity
Pond 1C, 4.2V constant-current constant-voltage charging under 35 DEG C of constant temperatures is 0.02C to electric current, shelves 10 minutes, then puts from 20C constant current
Electricity, to 3V, shelves the curve map of the battery capacity detecting when and so on circulating 300 times and cycle-index 30 minutes.
Table 1
The 85 of lithium ion battery (just extremely cobalt acid lithium, nickle cobalt lithium manganate or the two doping system) as can be seen from Table 1
DEG C high-temperature storage performance.Battery stores 4 hours at 85 DEG C, and bulging is very serious for general electrolytic solution battery, and battery is reported completely
Useless, and use the cell thickness of electrolyte of the present invention to increase respectively less than 6%.
From figure 1 it appears that under 35 DEG C of environment, high multiplying power lithium ion battery 1C charges, the week of 20C discharge cycles
Secondary.Battery using electrolyte of the present invention can be when 180 weeks, and capability retention is 90%, and general electrolytic solution battery
Being merely able to the capability retention when the 80th week is 90%.
Compared by data above, the lithium-ion battery electrolytes of the present invention effectively improve high multiplying power lithium ion
The high-temperature storage performance of battery and high temperature high-multiplying power discharge specific capacity.
A kind of high temperature resistant high multiplying power lithium ion battery electrolyte of the present invention, efficiently solves high-multiplying-power battery in high temperature
The problems such as storage thickness bulging rate under electric discharge security performance under environment, hot environment is big, improves the high temperature high power of lithium battery
Rate cycle performance, by high temperature resistant type solvent, so that lithium battery carries out the life-span of high power charging-discharging circulation at high temperature
It is greatly improved, the high temperature storage security performance of lithium battery also improves a lot simultaneously.
Present invention also offers a kind of cobalt acid lithium being made up of described high temperature resistant high multiplying power lithium ion battery electrolyte, nickel cobalt
LiMn2O4 or the two doping system are as the lithium ion battery of positive pole.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.
Claims (9)
1. a kind of high temperature resistant high multiplying power lithium ion battery electrolyte is it is characterised in that be made up of the component of following mass percent：
Lithium salts 14%-18%, organic solvent 80%-85% and additive 0.5%-5%.
2. according to claim 1 a kind of high temperature resistant high multiplying power lithium ion battery electrolyte it is characterised in that：Described additive
Mixed by sulfurous propyl propionate and triflate.
3. according to claim 2 a kind of high temperature resistant high multiplying power lithium ion battery electrolyte it is characterised in that：Described additive
In, sulfurous propyl propionate is 1 with the mixing ratio of triflate:(1-4).
4. according to claim 1 a kind of high temperature resistant high multiplying power lithium ion battery electrolyte it is characterised in that：Described lithium salts is
Lithium hexafluoro phosphate or LiBF4.
5. according to claim 1 a kind of high temperature resistant high multiplying power lithium ion battery electrolyte it is characterised in that：Described organic molten
Agent is uniformly mixed by diethyl carbonate, ethylene carbonate, propene carbonate.
6. according to claim 5 a kind of high temperature resistant high multiplying power lithium ion battery electrolyte it is characterised in that：Described organic molten
In agent, diethyl carbonate, ethylene carbonate, propene carbonate are according to volume ratio 1:1:1 uniformly mixes.
7. according to claim 1 a kind of high temperature resistant high multiplying power lithium ion battery electrolyte it is characterised in that：Described organic molten
Agent is uniformly mixed by methyl ethyl carbonate, ethylene carbonate, propene carbonate.
8. according to claim 7 a kind of high temperature resistant high multiplying power lithium ion battery electrolyte it is characterised in that：Described organic molten
In agent, methyl ethyl carbonate, ethylene carbonate, propene carbonate are according to volume ratio 1:1:1 uniformly mixes.
9. high temperature resistant high multiplying power lithium ion battery electrolyte described in a kind of any one by claim 1 to 8 is made cobalt acid lithium, nickel
Cobalt manganic acid lithium or the two doping system are as the lithium ion battery of positive pole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610930483.4A CN106450456A (en) | 2016-10-31 | 2016-10-31 | High-rate lithium-ion battery electrolyte with high temperature resistance and battery containing high-rate lithium-ion battery electrolyte |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610930483.4A CN106450456A (en) | 2016-10-31 | 2016-10-31 | High-rate lithium-ion battery electrolyte with high temperature resistance and battery containing high-rate lithium-ion battery electrolyte |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1339846A (en) * | 2001-09-25 | 2002-03-13 | 天津化工研究设计院 | Lithium secondary cell electrolyte |
| CN1434536A (en) * | 2003-03-08 | 2003-08-06 | 汕头市金光高科有限公司 | Method for preparing secondary lithium ion cell electrolyte solution and equipment thereof |
| EP2249426A1 (en) * | 2008-02-29 | 2010-11-10 | Mitsubishi Chemical Corporation | Nonaqueous electrolyte solution and nonaqueous electrolyte battery |
| CN102347475A (en) * | 2010-07-27 | 2012-02-08 | 曾永斌 | High-performance lithium ion battery and preparation process thereof |
| CN103715458A (en) * | 2013-10-23 | 2014-04-09 | 江西优锂新材股份有限公司 | Preparation method of electrolyte used for lithium manganate power battery at high temperature |
| CN103779599A (en) * | 2013-12-19 | 2014-05-07 | 宁波维科电池股份有限公司 | Circulated lithium-manganese-rich solid solution battery |
-
2016
- 2016-10-31 CN CN201610930483.4A patent/CN106450456A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1339846A (en) * | 2001-09-25 | 2002-03-13 | 天津化工研究设计院 | Lithium secondary cell electrolyte |
| CN1434536A (en) * | 2003-03-08 | 2003-08-06 | 汕头市金光高科有限公司 | Method for preparing secondary lithium ion cell electrolyte solution and equipment thereof |
| EP2249426A1 (en) * | 2008-02-29 | 2010-11-10 | Mitsubishi Chemical Corporation | Nonaqueous electrolyte solution and nonaqueous electrolyte battery |
| CN103078137A (en) * | 2008-02-29 | 2013-05-01 | 三菱化学株式会社 | Nonaqueous electrolytic solution and nonaqueous-electrolyte battery |
| CN102347475A (en) * | 2010-07-27 | 2012-02-08 | 曾永斌 | High-performance lithium ion battery and preparation process thereof |
| CN103715458A (en) * | 2013-10-23 | 2014-04-09 | 江西优锂新材股份有限公司 | Preparation method of electrolyte used for lithium manganate power battery at high temperature |
| CN103779599A (en) * | 2013-12-19 | 2014-05-07 | 宁波维科电池股份有限公司 | Circulated lithium-manganese-rich solid solution battery |
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