CN107230800A - Electrolyte for lithium ion battery and lithium ion battery - Google Patents
Electrolyte for lithium ion battery and lithium ion battery Download PDFInfo
- Publication number
- CN107230800A CN107230800A CN201710495702.5A CN201710495702A CN107230800A CN 107230800 A CN107230800 A CN 107230800A CN 201710495702 A CN201710495702 A CN 201710495702A CN 107230800 A CN107230800 A CN 107230800A
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- Prior art keywords
- electrolyte
- lithium ion
- ion battery
- carbonate
- aqueous organic
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 48
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 36
- 239000000203 mixture Substances 0.000 claims abstract description 16
- 239000011356 non-aqueous organic solvent Substances 0.000 claims abstract description 16
- 239000000654 additive Substances 0.000 claims abstract description 15
- 230000000996 additive effect Effects 0.000 claims abstract description 15
- 239000013538 functional additive Substances 0.000 claims abstract description 12
- 229910003002 lithium salt Inorganic materials 0.000 claims abstract description 12
- 159000000002 lithium salts Chemical class 0.000 claims abstract description 12
- HEBTZZBBPUFAFE-UHFFFAOYSA-N 2-methyl-n-(oxomethylidene)benzenesulfonamide Chemical group CC1=CC=CC=C1S(=O)(=O)N=C=O HEBTZZBBPUFAFE-UHFFFAOYSA-N 0.000 claims abstract description 5
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 claims description 16
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 11
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 9
- 229910001290 LiPF6 Inorganic materials 0.000 claims description 9
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 claims description 8
- FKRCODPIKNYEAC-UHFFFAOYSA-N ethyl propionate Chemical compound CCOC(=O)CC FKRCODPIKNYEAC-UHFFFAOYSA-N 0.000 claims description 8
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 6
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims description 6
- 150000002148 esters Chemical class 0.000 claims description 5
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 claims description 4
- BTGRAWJCKBQKAO-UHFFFAOYSA-N adiponitrile Chemical compound N#CCCCCC#N BTGRAWJCKBQKAO-UHFFFAOYSA-N 0.000 claims description 4
- 239000004305 biphenyl Substances 0.000 claims description 4
- 235000010290 biphenyl Nutrition 0.000 claims description 4
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims description 4
- HHNHBFLGXIUXCM-GFCCVEGCSA-N cyclohexylbenzene Chemical compound [CH]1CCCC[C@@H]1C1=CC=CC=C1 HHNHBFLGXIUXCM-GFCCVEGCSA-N 0.000 claims description 4
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 4
- PYLWMHQQBFSUBP-UHFFFAOYSA-N monofluorobenzene Chemical compound FC1=CC=CC=C1 PYLWMHQQBFSUBP-UHFFFAOYSA-N 0.000 claims description 4
- YKYONYBAUNKHLG-UHFFFAOYSA-N n-Propyl acetate Natural products CCCOC(C)=O YKYONYBAUNKHLG-UHFFFAOYSA-N 0.000 claims description 4
- 229940090181 propyl acetate Drugs 0.000 claims description 4
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- -1 silicon amine Chemical class 0.000 claims description 4
- IAHFWCOBPZCAEA-UHFFFAOYSA-N succinonitrile Chemical compound N#CCCC#N IAHFWCOBPZCAEA-UHFFFAOYSA-N 0.000 claims description 4
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 claims description 4
- GWAOOGWHPITOEY-UHFFFAOYSA-N 1,5,2,4-dioxadithiane 2,2,4,4-tetraoxide Chemical compound O=S1(=O)CS(=O)(=O)OCO1 GWAOOGWHPITOEY-UHFFFAOYSA-N 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- AVTOEKKTKXLWDL-UHFFFAOYSA-N acetylene;1,3-dioxolan-2-one Chemical group C#C.O=C1OCCO1 AVTOEKKTKXLWDL-UHFFFAOYSA-N 0.000 claims description 3
- SIXOAUAWLZKQKX-UHFFFAOYSA-N carbonic acid;prop-1-ene Chemical compound CC=C.OC(O)=O SIXOAUAWLZKQKX-UHFFFAOYSA-N 0.000 claims description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N dimethylmethane Natural products CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 3
- VEWLDLAARDMXSB-UHFFFAOYSA-N ethenyl sulfate;hydron Chemical compound OS(=O)(=O)OC=C VEWLDLAARDMXSB-UHFFFAOYSA-N 0.000 claims description 3
- 239000001294 propane Substances 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 125000005678 ethenylene group Chemical group [H]C([*:1])=C([H])[*:2] 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims 3
- FLKPEMZONWLCSK-UHFFFAOYSA-N diethyl phthalate Chemical compound CCOC(=O)C1=CC=CC=C1C(=O)OCC FLKPEMZONWLCSK-UHFFFAOYSA-N 0.000 claims 2
- OQXNUCOGMMHHNA-UHFFFAOYSA-N 4-methyl-1,3,2-dioxathiolane 2,2-dioxide Chemical compound CC1COS(=O)(=O)O1 OQXNUCOGMMHHNA-UHFFFAOYSA-N 0.000 claims 1
- 108090000765 processed proteins & peptides Proteins 0.000 claims 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 claims 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- YTZKOQUCBOVLHL-UHFFFAOYSA-N tert-butylbenzene Chemical compound CC(C)(C)C1=CC=CC=C1 YTZKOQUCBOVLHL-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 108010069514 Cyclic Peptides Proteins 0.000 description 3
- 102000001189 Cyclic Peptides Human genes 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- BKIWAQYWKUFSRE-UHFFFAOYSA-N prop-1-ene;sulfuric acid Chemical group CC=C.OS(O)(=O)=O BKIWAQYWKUFSRE-UHFFFAOYSA-N 0.000 description 3
- 238000007086 side reaction Methods 0.000 description 3
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 2
- 229910007035 Li(CF3SO3) Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910001540 lithium hexafluoroarsenate(V) Inorganic materials 0.000 description 2
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 2
- 229910001486 lithium perchlorate Inorganic materials 0.000 description 2
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- XCASEDBCMLBDON-UHFFFAOYSA-N C(C)(=O)OC=C.S(=O)(=O)(O)O Chemical compound C(C)(=O)OC=C.S(=O)(=O)(O)O XCASEDBCMLBDON-UHFFFAOYSA-N 0.000 description 1
- XSQSCWZDPXWZSW-UHFFFAOYSA-N C1(OCC(C)CCO1)=O.C(O)(O)=O Chemical compound C1(OCC(C)CCO1)=O.C(O)(O)=O XSQSCWZDPXWZSW-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000002879 Lewis base Substances 0.000 description 1
- 229910001216 Li2S Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- QSNQXZYQEIKDPU-UHFFFAOYSA-N [Li].[Fe] Chemical compound [Li].[Fe] QSNQXZYQEIKDPU-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 125000004494 ethyl ester group Chemical group 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 150000002596 lactones Chemical class 0.000 description 1
- 150000007527 lewis bases Chemical class 0.000 description 1
- 229910052808 lithium carbonate Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Secondary Cells (AREA)
Abstract
The present invention provides a kind of electrolyte for lithium ion battery, including lithium salts, non-aqueous organic solvent, film for additive and other functional additives, it is 0.5 1% that the film for additive, which includes the weight/mass percentage composition of Methyl benzenesulfonyl isocyanate (PTSI) and PTSI in the non-aqueous organic solvent,.The present invention also provides a kind of lithium ion battery using above-mentioned electrolyte, with more preferable high rate performance and cycle performance.
Description
【Technical field】
The invention belongs to power battery technology field, more particularly to a kind of electrolyte for lithium ion battery and use the electrolysis
The lithium ion battery of liquid.
【Background technology】
Electrolyte can be reduced electrolyte by solvent complex and bond, improves the solubility of electrolyte lithium salt, improve electrolysis
Liquid and both positive and negative polarity interface and increase electrolyte improve the high rate performance of lithium ion battery and followed to the wellability of positive and negative pole material
Ring performance.
Film for additive in conventional lithium-ion battery electrolytes is vinylene carbonate fat, high, steady with film forming efficiency
Qualitative good the advantages of, but it is high into membrane impedance, hinder the migration of lithium ion during high power charging-discharging, it is impossible to meet power electric
Pond high magnification is macrocyclic to be required.
【The content of the invention】
The present invention propose it is a kind of be used for lithium ion battery and can improve the electrolyte of its high rate performance and cycle performance with
And a kind of lithium ion battery for having used the electrolyte.
The present invention provides a kind of electrolyte for lithium ion battery, including lithium salts, non-aqueous organic solvent, film for additive and its
Its functional additive, the film for additive includes Methyl benzenesulfonyl isocyanate (PTSI) and PTSI is described non-aqueous organic molten
Weight/mass percentage composition in agent is 0.5-1%.
In a preferred embodiment, the lithium salts is LiPF6。
In a preferred embodiment, the non-aqueous organic solvent includes cyclic peptide acid esters and/or person's linear carbonates,
Preferably ethylene carbonate, propene carbonate, dimethyl carbonate, methyl ethyl carbonate, diethyl carbonate, gamma-butyrolacton, acetic acid second
One or more in ester, propyl acetate, ethyl propionate.
In a preferred embodiment, the film for additive also includes vinylene carbonate and vinylene carbonate fat exists
Weight/mass percentage composition in the non-aqueous organic solvent is preferably 2%.
In a preferred embodiment, other functional additives be vinylene carbonate, PS,
Fluorinated ethylene carbonate, ethylene carbonate vinylene, sulfuric acid vinyl ester, sulfuric acid propylene, 1,3- propene sultones, methane two
Sulfonic acid methylene ester, 1,4- butyl sultones, biphenyl, fluorobenzene, cyclohexyl benzene, tert-butyl benzene, hmds, the silicon of seven methyl two
One or more in amine, succinonitrile, adiponitrile.
In a preferred embodiment, weight/mass percentage composition of the other functional additives in the electrolyte is
0.5-10%.
The present invention also provides a kind of lithium ion battery, including above-mentioned electrolyte.
The electrolyte for lithium ion battery that the present invention is provided is using PTSI as film for additive, and the SEI films of formation have
Relatively low interface impedance, while PF can also be suppressed5The activity of acidic materials, reduces side reaction, is circulated throughout so as to reduce and fill soon
The consumption of lithium ion in journey.In addition, being entered using the high rate performance and cycle performance of the lithium ion battery of above-mentioned electrolyte
The improvement of one step.
【Brief description of the drawings】
Fig. 1 is respectively with the circulation of the lithium ion battery of the electrolyte assembling of comparative example, embodiment 1 and embodiment 2 acquisition
Performance test curve.
Fig. 2 is PF in electrolyte5Side reaction mechanism
Fig. 3 is PTSI membrane formation mechanism.
【Embodiment】
The present invention provides a kind of electrolyte for lithium ion battery, including lithium salts, non-aqueous organic solvent, film for additive and its
Its functional additive.
Specifically, the lithium salts includes LiClO4、LiPF6、LiAsF6、LiBF4、Li(CF3SO3) and Li (CF3SO2)2In N
One or more, preferably LiPF6。
The non-aqueous organic solvent includes cyclic peptide acid esters and/or person's linear carbonates, preferably ethylene carbonate, carbonic acid
Propylene, dimethyl carbonate, methyl ethyl carbonate, diethyl carbonate, gamma-butyrolacton, ethyl acetate, propyl acetate, ethyl propionate
In one or more.
The film for additive includes vinylene carbonate and Methyl benzenesulfonyl isocyanate (PTSI), and PTSI is in institute
It is 0.5-1%, matter of the vinylene carbonate fat in the non-aqueous organic solvent to state the weight/mass percentage composition in non-aqueous organic solvent
It is preferably 2% to measure percentage composition.
Other functional additives are vinylene carbonate, 1,3- propane sultones, fluorinated ethylene carbonate, ethylene
Alkene vinylene, sulfuric acid vinyl ester, sulfuric acid propylene, 1,3- propene sultones, methane-disulfonic acid methylene ester, 1,4- fourth sulfonic acid
In lactone, biphenyl, fluorobenzene, cyclohexyl benzene, tert-butyl benzene, hmds, the silicon amine of seven methyl two, succinonitrile, adiponitrile
It is one or more of.Further, weight/mass percentage composition of the other functional additives in the electrolyte is 0.5-10%.
The present invention also provides a kind of lithium ion battery, including positive pole, negative pole and electrolyte, the electrolyte include lithium salts,
Non-aqueous organic solvent, film for additive and other functional additives.The lithium salts includes LiClO4、LiPF6、LiAsF6、LiBF4、
Li(CF3SO3) and Li (CF3SO2)2One or more in N, preferably LiPF6.The non-aqueous organic solvent includes cyclic peptide acid
Ester and/or person's linear carbonates, preferably ethylene carbonate, propene carbonate, dimethyl carbonate, methyl ethyl carbonate, carbonic acid two
One or more in ethyl ester, gamma-butyrolacton, ethyl acetate, propyl acetate, ethyl propionate.The film for additive includes carbon
Sour vinylene and Methyl benzenesulfonyl isocyanate (PTSI), and quality percentages of the PTSI in the non-aqueous organic solvent contain
Measure as 0.5-1%, weight/mass percentage composition of the vinylene carbonate fat in the non-aqueous organic solvent is preferably 2%.It is described other
Functional additive is vinylene carbonate, 1,3- propane sultones, fluorinated ethylene carbonate, ethylene carbonate vinylene, sulfuric acid
Vinyl acetate, sulfuric acid propylene, 1,3- propene sultones, methane-disulfonic acid methylene ester, 1,4- butyl sultones, biphenyl, fluorobenzene,
One or more in cyclohexyl benzene, tert-butyl benzene, hmds, the silicon amine of seven methyl two, succinonitrile, adiponitrile.Enter one
Step, weight/mass percentage composition of the other functional additives in the electrolyte is 0.5-10%.
Comparative example
At room temperature, in the glove box full of argon gas by ethylene carbonate, dimethyl carbonate and methyl ethyl carbonate according to 1:
1:1 mass ratio mixing, then adds the vinylene carbonate fat that weight/mass percentage composition is 2%, adds lithium salts (LiPF6) and it is molten
Solution to concentration is 1.1mol/L, and obtained electrolyte is labeled as electrolyte 0.
Embodiment 1
At room temperature, in the glove box full of argon gas by ethylene carbonate, dimethyl carbonate and methyl ethyl carbonate according to 1:
1:1 mass ratio mixing, then adds vinylene carbonate fat and 1% PTSI that weight/mass percentage composition is 2%, adds
LiPF6And concentration is dissolved to for 1.1mol/L, obtained electrolyte is labeled as electrolyte 1.
Embodiment 2
At room temperature, in the glove box full of argon gas by ethylene carbonate, dimethyl carbonate and methyl ethyl carbonate according to 1:
1:1 mass ratio mixing, then adds vinylene carbonate fat and 0.5% PTSI that weight/mass percentage composition is 2%, adds lithium
Salt LiPF6And concentration is dissolved to for 1.1mol/L, obtained electrolyte is labeled as electrolyte 2.
Electrolyte 0, electrolyte 1 and electrolyte 2 is respectively adopted to assemble with the positive pole of iron lithium preparation and the negative pole of graphite preparation
Into columned lithium ion battery, the impedance after they are carried out the cycle performance of discharge and recharge and circulated 50 weeks with 6C, measurement are measured
As a result as shown in Fig. 1 and following table.
Test result shows that the lithium ion battery assembled using electrolyte 0, electrolyte 1 and electrolyte 2 is circulated in normal temperature 6C
Capability retention after 300 weeks is respectively 90%, 93% and 96%, so the lithium ion battery assembled using PTSI electrolyte
With more preferable capability retention.In addition, the interface impedance of SEI films can also effectively be reduced using PTSI electrolyte, so that
Improve lithium ion battery fills long circulating performance soon.
In the electrolyte without PTSI only using vinylene carbonate fat as film for additive when, vinylene carbonate fat exists
Li in cathodic reduction, the SEI films of formation2CO3And ROCO2The components such as Li easily with the PF in electrolyte5Occurs pair Deng acid impurities
Reaction generation low activity product LiF (reaction mechanism is as shown in Figure 2), hinders the fast transferring of lithium ion, cause polarization big and
Consume lithium ion.
Referring to Fig. 3, PTSI has relatively low lumo energy, preferentially in negative terminal surface film forming, it reduces the SEI films formed
Component is mainly Li2SO3、Li2S and ROSO2Li, compared with Li2CO3And ROCO2Li compositions are more stable, and do not react generation with HF
Low activity product LiF, so as to reduce interface impedance, is conducive to the diffusion and migration of lithium ion.In addition, S=O and N in PTSI
Center electron has delocalization effect, equivalent to weak lewis base, can effectively reduce PF5Deng the side reaction of acid impurities, so as to subtract
Few consumption for filling lithium ion in cyclic process soon.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is to combine specific preferred embodiment to institute of the present invention
The further description of work, it is impossible to assert that the specific implementation of the present invention is confined to these explanations.It is all the present invention spirit and
Any modifications, equivalent substitutions and improvements made within principle etc., should be included within the scope of the present invention.
Claims (7)
1. a kind of electrolyte for lithium ion battery, including lithium salts, non-aqueous organic solvent, film for additive and the addition of other functions
Agent, it is characterised in that：The film for additive includes Methyl benzenesulfonyl isocyanate (PTSI) and PTSI is described non-aqueous organic
Weight/mass percentage composition in solvent is 0.5-1%.
2. electrolyte for lithium ion battery as claimed in claim 1, it is characterised in that：The lithium salts is preferably LiPF6。
3. electrolyte for lithium ion battery as claimed in claim 1, it is characterised in that：The non-aqueous organic solvent includes ring-type
Peptide acid esters and/or person's linear carbonates, preferably ethylene carbonate, propene carbonate, dimethyl carbonate, methyl ethyl carbonate, carbon
One or more in diethyl phthalate, gamma-butyrolacton, ethyl acetate, propyl acetate, ethyl propionate.
4. electrolyte for lithium ion battery as claimed in claim 1, it is characterised in that：The film for additive also includes carbonic acid
The weight/mass percentage composition of vinylene and vinylene carbonate fat in the non-aqueous organic solvent is preferably 2%.
5. electrolyte for lithium ion battery as claimed in claim 1, it is characterised in that：Other functional additives are carbonic acid
Vinylene, 1,3- propane sultones, fluorinated ethylene carbonate, ethylene carbonate vinylene, sulfuric acid vinyl ester, sulfuric acid propylene
Ester, 1,3- propene sultones, methane-disulfonic acid methylene ester, 1,4- butyl sultones, biphenyl, fluorobenzene, cyclohexyl benzene, the tert-butyl group
One or more in benzene, hmds, the silicon amine of seven methyl two, succinonitrile, adiponitrile.
6. electrolyte for lithium ion battery as claimed in claim 5, it is characterised in that：Other functional additives are described
Weight/mass percentage composition in electrolyte is 0.5-10%.
7. a kind of lithium ion battery, it is characterised in that：Including the electrolyte described in any one in claim 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710495702.5A CN107230800A (en) | 2017-06-26 | 2017-06-26 | Electrolyte for lithium ion battery and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710495702.5A CN107230800A (en) | 2017-06-26 | 2017-06-26 | Electrolyte for lithium ion battery and lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107230800A true CN107230800A (en) | 2017-10-03 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710495702.5A Pending CN107230800A (en) | 2017-06-26 | 2017-06-26 | Electrolyte for lithium ion battery and lithium ion battery |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658427A (en) * | 2017-10-13 | 2018-02-02 | 江苏海四达电源股份有限公司 | A kind of lithium cell cathode material, cathode of lithium battery, lithium battery and their preparation method |
| CN109103501A (en) * | 2018-07-13 | 2018-12-28 | 惠州市智键科技有限公司 | A kind of lithium-ion battery electrolytes |
| CN109244543A (en) * | 2018-11-06 | 2019-01-18 | 南通新宙邦电子材料有限公司 | A kind of lithium-ion battery electrolytes and lithium ion battery |
| CN109860708A (en) * | 2019-01-04 | 2019-06-07 | 上海德朗能动力电池有限公司 | A kind of lithium titanate battery electrolyte |
| CN111224160A (en) * | 2018-11-26 | 2020-06-02 | 中国科学院大连化学物理研究所 | Electrolyte for lithium ion battery and application thereof |
| CN111342132A (en) * | 2020-03-04 | 2020-06-26 | 河南省法恩莱特新能源科技有限公司 | Lithium manganate multiplying power lithium ion battery electrolyte and preparation method thereof |
| CN112599856A (en) * | 2021-03-01 | 2021-04-02 | 新乡华锐锂电新能源有限公司 | Electrolyte adaptive to high-nickel ternary cathode material |
| CN112751079A (en) * | 2019-10-31 | 2021-05-04 | 苏州微木智能系统有限公司 | Lithium ion battery |
| CN113851666A (en) * | 2021-09-16 | 2021-12-28 | 湖州昆仑亿恩科电池材料有限公司 | Electrolyte of primary lithium battery and preparation method and application thereof |
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2017
- 2017-06-26 CN CN201710495702.5A patent/CN107230800A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658427A (en) * | 2017-10-13 | 2018-02-02 | 江苏海四达电源股份有限公司 | A kind of lithium cell cathode material, cathode of lithium battery, lithium battery and their preparation method |
| CN109103501A (en) * | 2018-07-13 | 2018-12-28 | 惠州市智键科技有限公司 | A kind of lithium-ion battery electrolytes |
| CN109244543A (en) * | 2018-11-06 | 2019-01-18 | 南通新宙邦电子材料有限公司 | A kind of lithium-ion battery electrolytes and lithium ion battery |
| CN109244543B (en) * | 2018-11-06 | 2021-08-13 | 南通新宙邦电子材料有限公司 | Lithium ion battery electrolyte and lithium ion battery |
| CN111224160A (en) * | 2018-11-26 | 2020-06-02 | 中国科学院大连化学物理研究所 | Electrolyte for lithium ion battery and application thereof |
| CN109860708A (en) * | 2019-01-04 | 2019-06-07 | 上海德朗能动力电池有限公司 | A kind of lithium titanate battery electrolyte |
| CN112751079A (en) * | 2019-10-31 | 2021-05-04 | 苏州微木智能系统有限公司 | Lithium ion battery |
| CN111342132A (en) * | 2020-03-04 | 2020-06-26 | 河南省法恩莱特新能源科技有限公司 | Lithium manganate multiplying power lithium ion battery electrolyte and preparation method thereof |
| CN112599856A (en) * | 2021-03-01 | 2021-04-02 | 新乡华锐锂电新能源有限公司 | Electrolyte adaptive to high-nickel ternary cathode material |
| CN113851666A (en) * | 2021-09-16 | 2021-12-28 | 湖州昆仑亿恩科电池材料有限公司 | Electrolyte of primary lithium battery and preparation method and application thereof |
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