CN103996873B - The lithium ion battery nonaqueous electrolytic solution of coupling BTR918 graphite cathode - Google Patents
The lithium ion battery nonaqueous electrolytic solution of coupling BTR918 graphite cathode Download PDFInfo
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- CN103996873B CN103996873B CN201410213153.4A CN201410213153A CN103996873B CN 103996873 B CN103996873 B CN 103996873B CN 201410213153 A CN201410213153 A CN 201410213153A CN 103996873 B CN103996873 B CN 103996873B
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- Prior art keywords
- carbonate
- electrolytic solution
- additive
- btr918
- nonaqueous electrolytic
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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
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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
- H01M10/052—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
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0025—Organic electrolyte
-
- 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 discloses a kind of lithium ion battery nonaqueous electrolytic solution mating BTR918 graphite, this electrolyte is made up of solvent, lithium salts, HFIP, fluoro carbonic ester class additive, sulfonic acid esters additive and/or conventional lithium battery electrolytes additive, wherein, solvent 100 weight portion；HFIP 1～5 weight portion；Fluoro carbonic ester class additive 1～5 weight portion；Sulfonic acid esters additive 1～5 weight portion, conventional lithium battery electrolytes additive 0～5 weight portion；Solvent is cyclic carbonate and/or linear carbonate, and lithium salts molar concentration in a solvent is 0.8 1.5mol/L；The present invention passes through HFIP, fluoro carbonic ester, and sulfonic acid esters additive is used in combination, hence it is evident that improve the cycle performance of BTR918 graphite cathode.Present invention can apply to field of batteries.
Description
Technical field
The present invention relates to a kind of electrolyte, particularly relate to a kind of lithium ion battery of BTR918 graphite cathode that mates with non-aqueous
Electrolyte.
Background technology
Lithium ion battery has the advantages such as running voltage height, energy density height, environmental friendliness, stable circulation, safety because of it,
It is widely used in the various electronic equipment of notebook computer, mobile phone, MP4 etc..But along with battery capacity in electronic equipment
Improving, people it is also proposed higher requirement to running voltage and the energy density of lithium ion battery.And the work of lithium ion battery
Make voltage relevant with the charge-discharge performance of lithium ion battery with energy density.At present, lithium ion battery on the market is filling
Discharge cycles aspect of performance is the highest, and this running voltage causing lithium ion battery and energy density can not meet requirement.
Summary of the invention
The technical problem to be solved is to overcome the deficiencies in the prior art, it is provided that one can promote lithium ion battery
The lithium ion battery nonaqueous electrolytic solution of coupling BTR918 graphite cathode that improves of charge-discharge performance.
The technical solution adopted in the present invention is: nonaqueous electrolytic solution of the present invention includes lithium salts, in this nonaqueous electrolytic solution
Possibly together with solvent 100 weight portion；HFIP 1～5 weight portion；Fluoro carbonic ester class additive 1～10 weight portion；Sulfonic acid esters
Additive 1～5 weight portion；Described solvent is cyclic carbonate and/or linear carbonate.
Further, this nonaqueous electrolytic solution also includes conventional lithium battery electrolytes additive 0～5 weight portion.
Further, described cyclic carbonate is ethylene carbonate, Allyl carbonate, fluorinated ethylene carbonate or γ-fourth
At least one in lactone.
Further, described linear carbonate is dimethyl carbonate, diethyl carbonate, Ethyl methyl carbonate, methyl propyl carbonate
Or at least one in ethyl propyl carbonic acid ester.
Further, described fluoro carbonic ester class additive is at least one in FEC, DFEC.
Further, described sultones class additive is 1,3-propene sultone, 1,3 propane sultones or Isosorbide-5-Nitrae-fourth
At least one of alkene sultones.
Further, described lithium salts is LiPF6、LiBF4、LiC104、LiAsF6、LiCF3SO2、LiN (CF3S02)2、
LiBOB, LiDFOB, LiFSi, LiPF4C204Or LiN (C2F5S02)2In at least one, lithium salts molar concentration in a solvent
It is 0.8～1.5mol/L.
Further, described conventional lithium battery electrolytes additive is vinylene carbonate, vinyl ethylene carbonate vinegar or 1,
At least one in 3-propane sultone.
The invention has the beneficial effects as follows: in the present invention, utilize the electrophilic of the fluorine element in fluoro esters additive to imitate
Should, can be effectively improved the solvent molecule reduction potential on Carbon anode surface, optimize solid electrolyte interface film, improve electrolyte with
The compatibility of active material, and then the chemical property of stabilized electrodes, have preferable resistance to oxidation resistance, can significantly improve
The cycle performance of battery；It addition, by HFIP, fluoro carbonic ester class additive and the connection of three kinds of additives of sulfonic acid esters additive
Close and use the consistency problem significantly improving BTR918 graphite cathode, hence it is evident that improve battery normal-temperature circulating performance.
Detailed description of the invention
The preparation process of nonaqueous electrolytic solution of the present invention is as follows: prepare electrolyte in BRAUN glove box, in glove box
Full purity is the nitrogen of 99.999%, and in glove box, moisture Control is at≤5ppm, and temperature is room temperature.By 30 grams of ethylene carbonates
EC and 70 grams of Ethyl methyl carbonate EMC mix homogeneously, seal, and puts in refrigerator after it is cooled to 8 DEG C, is transferred in glove box,
Add LiPF the most in two batches6It is sufficiently mixed, forms the non-aqueous solution electrolysis of the lithium ion battery that lithium salts molar concentration is 1 mol/L
Liquid；The fluorinated ethylene carbonate FEC, 1% hexafluoroisopropanol HFIP, 2% of solvent gross mass 1% is added in above nonaqueous electrolytic solution
Polystyrene PS, the vinylene carbonate VC of 1%, uniformly after mixing, finally give lithium ion nonaqueous electrolytic solution.
With five embodiments, the invention will be further described with comparative example below.
According to the method described above, nonaqueous electrolytic solution, and then prepared lithium ion battery are prepared respectively with the content shown in table 1.
Table 1 embodiment electrolyte component contains scale
The electrolyte of comparative example, and then prepared lithium ion battery is prepared with content shown in table 2.
Table 2 comparative example electrolyte component contains scale
After the lithium ion battery prepare embodiment and comparative example, battery is carried out charge-discharge performance test, tool
Body is as follows.
With cobalt acid lithium as positive electrode, negative pole uses BTR918, and both positive and negative polarity collector is distributed as aluminium foil and Copper Foil, and barrier film is adopted
Form soft-package battery with ceramic diaphragm, after being injected separately into the electrolyte that embodiment and comparative example prepare, be assembled in glove box
Soft-package battery, tests after standing 8 hours.
Under 25 DEG C of constant temperature of room temperature respectively with 1/10C, carry out discharge and recharge at 3.0V to 4.2V and battery activated, subsequently
Circulation all with 1C discharge and recharge.After 300 room temperature charge and discharge cycles, capability retention is as inspection target, result such as table 3 institute
Show.
Table 3 embodiment and comparative example loop test result
Cycle performance test data from table 3 understand, and the nonaqueous electrolytic solution using the present invention to prepare prepares
Battery carry out 300 charge and discharge cycles after, battery still has higher capability retention；And use prior art to be prepared into
The battery that the electrolyte arrived prepares, after completing 300 charge and discharge cycles, capability retention is the lowest.
As can be seen here, additive HFIP used in the electrolyte of the present invention, fluoro carbonic ester class additive, sulphonic acid ester
Class additive can work in coordination with the room temperature charge-discharge performance improving battery under voltage, and the electrolyte system of the present invention has height and puts
Capacitance, good room temperature charge-discharge performance.The present invention has such advantages as relative to prior art and effect: use
The lithium battery room temperature containing BTR918 graphite cathode that the present invention above-described electrolyte nonaqueous electrolytic solution prepares and high temperature
Under there is preferable charge-discharge performance.
Present invention can apply to field of batteries.
It should be noted that and above-mentioned only describe the present invention with preferred embodiment, can not be limited to this with regard to this
Bright interest field, therefore in the case of without departing from inventive concept, the content of all utilization description of the invention is carried out
Equivalence change, all reason is with being included in scope of the presently claimed invention.
Claims (6)
1. mate a lithium ion battery nonaqueous electrolytic solution for BTR918 graphite cathode, including lithium salts, it is characterised in that it is also
Including
Solvent 100 weight portion；Hexafluoroisopropanol HFIP 1～5 weight portion；
Fluoro carbonic ester class additive 1～10 weight portion；Sulfonic acid esters additive 1～5 weight portion；
Described solvent is cyclic carbonate and/or linear carbonate；Described fluoro carbonic ester class additive is DFEC；Described sulfonic acid
Lactone additive is 1, at least one of 3-propene sultone, 1,3 propane sultones or Isosorbide-5-Nitrae-butylene sultones.
The lithium ion battery nonaqueous electrolytic solution of coupling BTR918 graphite cathode the most according to claim 1, its feature exists
In: this nonaqueous electrolytic solution also includes conventional lithium battery electrolytes additive 0～5 weight portion.
The lithium ion battery nonaqueous electrolytic solution of coupling BTR918 graphite cathode the most according to claim 1, its feature exists
In: described cyclic carbonate is at least in ethylene carbonate, Allyl carbonate, fluorinated ethylene carbonate or gamma-butyrolacton
Kind.
The lithium ion battery nonaqueous electrolytic solution of coupling BTR918 graphite cathode the most according to claim 1, its feature exists
In: described linear carbonate is in dimethyl carbonate, diethyl carbonate, Ethyl methyl carbonate, methyl propyl carbonate or ethyl propyl carbonic acid ester
At least one.
The lithium ion battery nonaqueous electrolytic solution of coupling BTR918 graphite cathode the most according to claim 1, its feature exists
In: described lithium salts is LiPF6、LiBF4、LiC1O4、LiAsF6、LiCF3SO2、LiN (CF3SO2)2, LiBOB, LiDFOB,
LiFSi、LiPF4C2O4Or LiN (C2F5SO2)2In at least one, lithium salts molar concentration in a solvent be 0.8～
1.5mol/L。
The lithium ion battery nonaqueous electrolytic solution of coupling BTR918 graphite cathode the most according to claim 2, its feature exists
In: described conventional lithium battery electrolytes additive is vinylene carbonate, vinyl ethylene carbonate or 1, in 3-propane sulfonic acid
At least one in ester.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410213153.4A CN103996873B (en) | 2014-05-20 | 2014-05-20 | The lithium ion battery nonaqueous electrolytic solution of coupling BTR918 graphite cathode |
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| CN201410213153.4A CN103996873B (en) | 2014-05-20 | 2014-05-20 | The lithium ion battery nonaqueous electrolytic solution of coupling BTR918 graphite cathode |
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| CN103996873B true CN103996873B (en) | 2016-08-24 |
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| CN105047993A (en) * | 2015-07-28 | 2015-11-11 | 东莞市凯欣电池材料有限公司 | Electrolyte for promoting film formation of graphite cathode and battery using electrolyte |
| CN105609877A (en) * | 2016-02-03 | 2016-05-25 | 东莞市凯欣电池材料有限公司 | High-voltage lithium-ion battery electrolyte and high-voltage lithium-ion battery |
| CN111082146A (en) * | 2020-01-21 | 2020-04-28 | 大同新成新材料股份有限公司 | Electrolyte taking propylene carbonate as main solvent |
| WO2023119947A1 (en) * | 2021-12-23 | 2023-06-29 | 株式会社村田製作所 | Electrolytic solution for lithium ion secondary battery and lithium ion secondary battery |
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| CN102082295A (en) * | 2010-12-29 | 2011-06-01 | 东莞市杉杉电池材料有限公司 | Electrolyte of lithium-ion secondary battery |
| CN102306835B (en) * | 2011-09-02 | 2014-12-17 | 广州天赐高新材料股份有限公司 | High voltage resistant and high temperature resistant safety type electrolyte for lithium ion battery adopting manganese material as anode, and use thereof |
| CN103633369A (en) * | 2013-12-03 | 2014-03-12 | 深圳市崧鼎科技有限公司 | High voltage lithium-ion battery electrolyte and lithium-ion battery |
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