CN106898819A - A kind of novel electrolyte and preparation method thereof and lithium battery - Google Patents
A kind of novel electrolyte and preparation method thereof and lithium battery Download PDFInfo
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- CN106898819A CN106898819A CN201710243894.0A CN201710243894A CN106898819A CN 106898819 A CN106898819 A CN 106898819A CN 201710243894 A CN201710243894 A CN 201710243894A CN 106898819 A CN106898819 A CN 106898819A
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 89
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 69
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 238000002360 preparation method Methods 0.000 title claims abstract description 6
- 125000001979 organolithium group Chemical group 0.000 claims abstract description 23
- -1 amido lithium Chemical compound 0.000 claims abstract description 22
- 229910001290 LiPF6 Inorganic materials 0.000 claims abstract description 8
- 150000001335 aliphatic alkanes Chemical class 0.000 claims abstract description 8
- 125000003368 amide group Chemical group 0.000 claims description 6
- NHKJPPKXDNZFBJ-UHFFFAOYSA-N phenyllithium Chemical compound [Li]C1=CC=CC=C1 NHKJPPKXDNZFBJ-UHFFFAOYSA-N 0.000 claims description 5
- ZFFMLCVRJBZUDZ-UHFFFAOYSA-N 2,3-dimethylbutane Chemical group CC(C)C(C)C ZFFMLCVRJBZUDZ-UHFFFAOYSA-N 0.000 claims description 4
- CBFCDTFDPHXCNY-UHFFFAOYSA-N icosane Chemical compound CCCCCCCCCCCCCCCCCCCC CBFCDTFDPHXCNY-UHFFFAOYSA-N 0.000 claims description 4
- YNESATAKKCNGOF-UHFFFAOYSA-N lithium bis(trimethylsilyl)amide Chemical compound [Li+].C[Si](C)(C)[N-][Si](C)(C)C YNESATAKKCNGOF-UHFFFAOYSA-N 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- QWOLVDBEENYDEO-UHFFFAOYSA-N NCC1=C(C=CC=C1)[Li] Chemical compound NCC1=C(C=CC=C1)[Li] QWOLVDBEENYDEO-UHFFFAOYSA-N 0.000 claims description 2
- LPGFUWDULBDHNI-UHFFFAOYSA-N [Li]C1(CCCC)CCCCC1 Chemical compound [Li]C1(CCCC)CCCCC1 LPGFUWDULBDHNI-UHFFFAOYSA-N 0.000 claims description 2
- LEKSIJZGSFETSJ-UHFFFAOYSA-N cyclohexane;lithium Chemical compound [Li]C1CCCCC1 LEKSIJZGSFETSJ-UHFFFAOYSA-N 0.000 claims description 2
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims description 2
- BLHLJVCOVBYQQS-UHFFFAOYSA-N ethyllithium Chemical group [Li]CC BLHLJVCOVBYQQS-UHFFFAOYSA-N 0.000 claims description 2
- DLEDOFVPSDKWEF-UHFFFAOYSA-N lithium butane Chemical group [Li+].CCC[CH2-] DLEDOFVPSDKWEF-UHFFFAOYSA-N 0.000 claims description 2
- UBJFKNSINUCEAL-UHFFFAOYSA-N lithium;2-methylpropane Chemical group [Li+].C[C-](C)C UBJFKNSINUCEAL-UHFFFAOYSA-N 0.000 claims description 2
- WGOPGODQLGJZGL-UHFFFAOYSA-N lithium;butane Chemical group [Li+].CC[CH-]C WGOPGODQLGJZGL-UHFFFAOYSA-N 0.000 claims description 2
- IHLVCKWPAMTVTG-UHFFFAOYSA-N lithium;carbanide Chemical group [Li+].[CH3-] IHLVCKWPAMTVTG-UHFFFAOYSA-N 0.000 claims description 2
- CETVQRFGPOGIQJ-UHFFFAOYSA-N lithium;hexane Chemical compound [Li+].CCCCC[CH2-] CETVQRFGPOGIQJ-UHFFFAOYSA-N 0.000 claims description 2
- SZAVVKVUMPLRRS-UHFFFAOYSA-N lithium;propane Chemical group [Li+].C[CH-]C SZAVVKVUMPLRRS-UHFFFAOYSA-N 0.000 claims description 2
- XBEREOHJDYAKDA-UHFFFAOYSA-N lithium;propane Chemical group [Li+].CC[CH2-] XBEREOHJDYAKDA-UHFFFAOYSA-N 0.000 claims description 2
- MZRVEZGGRBJDDB-UHFFFAOYSA-N n-Butyllithium Chemical group [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 claims description 2
- VAMFXQBUQXONLZ-UHFFFAOYSA-N n-alpha-eicosene Natural products CCCCCCCCCCCCCCCCCCC=C VAMFXQBUQXONLZ-UHFFFAOYSA-N 0.000 claims description 2
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- VBSKMKYTRASRSY-UHFFFAOYSA-N [Li]c1ccccc1CCCC Chemical compound [Li]c1ccccc1CCCC VBSKMKYTRASRSY-UHFFFAOYSA-N 0.000 claims 1
- 150000001298 alcohols Chemical class 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 29
- 230000006399 behavior Effects 0.000 description 19
- 238000005868 electrolysis reaction Methods 0.000 description 10
- 239000007788 liquid Substances 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 9
- 229910002804 graphite Inorganic materials 0.000 description 9
- 239000010439 graphite Substances 0.000 description 9
- 239000000126 substance Substances 0.000 description 9
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 6
- 229910052493 LiFePO4 Inorganic materials 0.000 description 4
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 3
- FUJCRWPEOMXPAD-UHFFFAOYSA-N Li2O Inorganic materials [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 description 2
- UZLAEBHBHMKALT-UHFFFAOYSA-N [Li]CCCC.C1CCOC1 Chemical compound [Li]CCCC.C1CCOC1 UZLAEBHBHMKALT-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- CGKQZIULZRXRRJ-UHFFFAOYSA-N Butylone Chemical compound CCC(NC)C(=O)C1=CC=C2OCOC2=C1 CGKQZIULZRXRRJ-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- NTYDXFVCCCPXRG-UHFFFAOYSA-N [Li]C(C)(C)CC(C)(C)C Chemical compound [Li]C(C)(C)CC(C)(C)C NTYDXFVCCCPXRG-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229910001947 lithium oxide Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 239000000758 substrate Substances 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
- H01M10/0569—Liquid materials characterised by the solvents
-
- 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
-
- 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)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of novel electrolyte and preparation method thereof, belong to battery material technical field.Aim to provide one kind lithium alkylide or alkane to be added in electrolyte for amido lithium solution, remove the Labile protons in minor amount of water and alcohols, improve LiPF6Stability, reduce HF content, thus improve lithium battery high-temperature behavior and cycle life novel electrolyte and lithium battery.Equivalent to the organolithium solution of electrolyte total amount 0.1%~25%, the concentration of the organolithium solution is 0.01%~50% for electrolyte addition of the present invention；Wherein, described organolithium is lithium alkylide or alkane for amido lithium or combination.Electrolyte provided by the present invention can be used to improve the cycle performance and high-temperature storage performance of lithium battery.Present invention also offers a kind of lithium battery containing above-mentioned electrolyte.
Description
Technical field
The invention belongs to battery material technical field, especially a kind of novel electrolyte, the invention further relates to above-mentioned electrolysis
The preparation method of liquid and the lithium battery using the electrolyte.
Background technology
In existing LiPF6In+organic solvent+additive business electrolyte system, because being purified in solvent manufacturing process
Problem, has the Labile protons such as a certain proportion of hydroxyl to remain, and these protons can decompose LIPF6HF is produced, thus can strong corrosion
SEI films, as temperature is raised, this influence can aggravate, and can also influence the cycle life of battery.
In the fabrication process, the residual quantity of both positive and negative polarity pole piece reclaimed water is up to 100~200 times to battery than electrolyte, works as battery
Stood after fluid injection, moisture largely enters electrolyte in pole piece, causes LiPF6Decomposition, produce HF, and with temperature raise,
It is this to decompose aggravation, there is greatly destruction to the performance of lithium battery, especially to the work of power high-capacity lithium battery minimal residue
Proton influence is sprinkled to become apparent.
The content of the invention
For above-mentioned deficiency, the present invention is intended to provide one kind lithium alkylide or alkane are added to electrolyte for amido lithium solution
In, the Labile protons in minor amount of water and alcohols are removed, improve LiPF6Stability, reduce HF content, thus improve lithium battery
High-temperature behavior and cycle life novel electrolyte, present invention also offers a kind of lithium battery containing above-mentioned electrolyte.
In order to realize above-mentioned technique effect, the technical scheme that the present invention is provided is such：A kind of novel electrolyte, addition
Equivalent to the organolithium solution of electrolyte total amount 0.1%~25%, the concentration of the organolithium solution is 0.01%~50%；
Wherein, described organolithium is lithium alkylide or alkane for amido lithium or combination.
Preferably, the organolithium solution equivalent to electrolyte total amount 10%~25%, the concentration of the organolithium solution are added
It is 1%~25%.
Preferably, the organolithium solution equivalent to electrolyte total amount 15%~20%, the concentration of the organolithium solution are added
It is 1%~5%.
Preferably, described lithium alkylide be straight chained alkyl lithium, branched alkyl lithium, cycloalkyl lithium and phenyl lithium in one kind or
It is several.
Preferably, described lithium alkylide be lithium methide, ethyl-lithium, propyl lithium, isopropyl lithium, n-BuLi, s-butyl lithium,
Tert-butyl lithium, amyl group lithium, hexyl lithium, cyclohexyl lithium, t-octyl lithium, n-eicosane base lithium, phenyl lithium, aminomethyl phenyl lithium, butyl
One or more in phenyl lithium, naphthyl lithium, butylcyclohexyl lithium.
Preferably, described alkane is lithium diisopropyl amido, dimethyl amido lithium, the silicon substrate amido of hexamethyl two for amido lithium
One or more in lithium, 1,1,2,2,3,3- hexafluoorpropane -1,3- di-sulfonyl imides lithium, lithium hexamethyldisilazide.
Preferably, the solvent of described organolithium solution is THF or DME or combination.
Preferably, described electrolyte is made up of following components：12.5%LiPF6, 30%EC, 21%EMC, 30%DEC,
3%PS and 3.5%VC.
A kind of preparation method of novel electrolyte as described above, comprises the steps successively：
Step 1：Organolithium solution is prepared under anaerobic water-less environment；
Step 2：During organolithium solution added into electrolyte in proportion, stirring obtains novel electrolyte.
A kind of lithium battery, described lithium battery uses electrolyte as described above.
Principle of the invention is as follows：
R-Li+H2O→RH+LiOH→RH+Li2O；
R-Li+R1-OH→RH+R1OLi；
RNHLi+H2O→RNH2+LiOH→Li2O；
RNHLi+R1OH→RNH2+R1OLi；
Wherein, lithia and lithium alkoxyl oxygen are the important compositions of solid electrolyte film SEI in lithium battery, to the performance of lithium battery
There is significant impact.
For amido lithium or combination solution be added in electrolyte for lithium alkylide or alkane by the present invention, can remove micro
Labile protons in moisture and alcohols, improve LiPF6Stability, reduce HF content, thus improve lithium battery it is high temperatures
Energy and cycle life.
Specific embodiment
With reference to specific embodiment, claim of the invention is described in further detail, but do not constitute it is right
Any limitation of the invention, the modification of any limited number of time made in the claims in the present invention protection domain, still in the present invention
Claims within.
Embodiment 1
Step 1：Compound concentration is 5% butyl lithium tetrahydrofuran solution, will be equivalent to the above-mentioned of electrolyte total amount 20%
Solution is added in the electrolyte that concentration is 1mol/L, obtains novel electrolyte；
Step 2：Novel electrolyte is injected into the lithium battery of the ternary of model PL8045135+graphite system, battery
Capacity 6000mAh；
Step 3：After chemical conversion and surveying is held, test 60 DEG C of -30 days and 85 DEG C of high-temperature behaviors of -48 hours and 1C cycle performances,
And contrasted with conventional electrolyte, as a result such as table 1：
The embodiment 1 of table 1 is contrasted with the high-temperature behavior and cycle performance of conventional electrolysis liquid
Embodiment 2
Step 1：Configuration concentration is 5% lithium diisopropyl amido tetrahydrofuran solution, will be equivalent to electrolyte total amount
15% above-mentioned solution is added in the electrolyte that concentration is 1mol/L, obtains novel electrolyte；
Step 2：Novel electrolyte is injected into the lithium battery of the ternary of model PL8045135+graphite system, battery
Capacity 6000mAh；
Step 3：After chemical conversion and surveying is held, test 60 DEG C of -30 days and 85 DEG C of high-temperature behaviors of -48 hours and 1C cycle performances,
And contrasted with conventional electrolyte, as a result such as table 2：
The embodiment 2 of table 2 is contrasted with the high-temperature behavior and cycle performance of conventional electrolysis liquid
Embodiment 3
Step 1：Compound concentration is 5% butyl lithium tetrahydrofuran solution, will be equivalent to the above-mentioned of electrolyte total amount 20%
Solution is added in the electrolyte that concentration is 1mol/L, obtains novel electrolyte；
Step 2：Novel electrolyte is injected into the lithium battery of the LiFePO4 of model PL8045135+graphite system,
Battery capacity 5000mAh；
Step 3：After chemical conversion and surveying is held, test 60 DEG C of -30 days and 85 DEG C of high-temperature behaviors of -48 hours and 1C cycle performances,
And contrasted with conventional electrolyte, as a result such as table 3：
The embodiment 3 of table 3 is contrasted with the high-temperature behavior and cycle performance of conventional electrolysis liquid
Embodiment 4
Step 1：Configuration concentration is 5% lithium diisopropyl amido tetrahydrofuran solution, will be equivalent to electrolyte total amount
15% above-mentioned solution is added in the electrolyte that concentration is 1mol/L, obtains novel electrolyte；
Step 2：Novel electrolyte is injected into the lithium battery of the LiFePO4 of model PL8045135+graphite system,
Battery capacity 5000mAh；
Step 3：After chemical conversion and surveying is held, test 60 DEG C of -30 days and 85 DEG C of -48 hours high-temperature behaviors and 1C cycle performances, and
Contrasted with conventional electrolyte, as a result such as table 4：
The embodiment 4 of table 4 is contrasted with the high-temperature behavior and cycle performance of conventional electrolysis liquid
Embodiment 5
Step 1：Configuration concentration is 5% isopropyl lithium tetrahydrofuran solution, will be equivalent to the upper of electrolyte total amount 15%
State solution add to concentration be 1mol/L electrolyte in, obtain novel electrolyte；
Step 2：In the lithium battery of LiFePO4+graphite system that novel electrolyte is injected model PL8045135, electricity
Tankage 5000mAh；
Step 3：After chemical conversion and surveying is held, test 60 DEG C of -30 days and 85 DEG C of high-temperature behaviors of -48 hours and 1C cycle performances,
And contrasted with conventional electrolyte, as a result such as table 5：
The embodiment 5 of table 5 is contrasted with the high-temperature behavior and cycle performance of conventional electrolysis liquid
Embodiment 6
Step 1：Configuration concentration is 5% isopropyl lithium tetrahydrofuran solution, will be equivalent to the upper of electrolyte total amount 15%
State solution add to concentration be 1mol/L electrolyte in, obtain novel electrolyte；
Step 2：By in the lithium battery of the ternary+graphite system of novel electrolyte injection model PL8045135, battery holds
Amount 6000mAh；
Step 3：After chemical conversion and surveying is held, test 60 DEG C of -30 days and 85 DEG C of high-temperature behaviors of -48 hours and 1C cycle performances,
And contrasted with conventional electrolyte, as a result such as table 6：
The embodiment 6 of table 6 is contrasted with the high-temperature behavior and cycle performance of conventional electrolysis liquid
Embodiment 7
Step 1：Configuration concentration is 0.01% butyl lithium ethylene glycol dimethyl ether solution, will be equivalent to electrolyte total amount 25%
Above-mentioned solution add to concentration be 1mol/L electrolyte in, obtain novel electrolyte；
Step 2：By in the lithium battery of the ternary+graphite system of novel electrolyte injection model PL8045135, battery holds
Amount 6000mAh；
Step 3：After chemical conversion and surveying is held, test 60 DEG C of -30 days and 85 DEG C of high-temperature behaviors of -48 hours and 1C cycle performances,
And contrasted with conventional electrolyte, as a result such as table 7：
The embodiment 7 of table 7 is contrasted with the high-temperature behavior and cycle performance of conventional electrolysis liquid
Embodiment 8
Step 1：Configuration concentration is 10% lithium diisopropyl amido ethylene glycol dimethyl ether solution, will be equivalent to electrolyte total
The above-mentioned solution of amount 10% is added in the electrolyte that concentration is 1mol/L, obtains novel electrolyte；
Step 2：In the lithium battery of LiFePO4+graphite system that novel electrolyte is injected model PL8045135, electricity
Tankage 5000mAh；
Step 3：After chemical conversion and surveying is held, test 60 DEG C of -30 days and 85 DEG C of high-temperature behaviors of -48 hours and 1C cycle performances,
And contrasted with conventional electrolyte, as a result such as table 8：
The embodiment 8 of table 8 is contrasted with the high-temperature behavior and cycle performance of conventional electrolysis liquid
Embodiment 9
Step 1：Configuration concentration is 50% isopropyl lithium ethylene glycol dimethyl ether solution, will be equivalent to electrolyte total amount
0.1% above-mentioned solution is added in the electrolyte that concentration is 1mol/L, obtains novel electrolyte；
Step 2：By in the lithium battery of the ternary+graphite system of novel electrolyte injection model PL8045135, battery holds
Amount 6000mAh；
Step 3：After chemical conversion and surveying is held, test 60 DEG C of -30 days and 85 DEG C of high-temperature behaviors of -48 hours and 1C cycle performances,
And contrasted with conventional electrolyte, as a result such as table 9：
The embodiment 9 of table 9 is contrasted with the high-temperature behavior and cycle performance of conventional electrolysis liquid
Electrolyte wherein described in embodiment 1 to embodiment 9 is made up of following components：12.5%LiPF6, 30%EC,
21%EMC, 30%DEC, 3%PS and 3.5%VC.
It is above-described be only presently preferred embodiments of the present invention, it is all made in the range of the spirit and principles in the present invention appoint
What modification, equivalent and improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of novel electrolyte, it is characterised in that addition equivalent to electrolyte total amount 0.1%~25% organolithium solution,
The concentration of the organolithium solution is 0.01%~50%；
Wherein, described organolithium is lithium alkylide or alkane for amido lithium or combination.
2. a kind of novel electrolyte according to claim 1, it is characterised in that addition equivalent to electrolyte total amount 10%~
25% organolithium solution, the concentration of the organolithium solution is 1%~25%.
3. a kind of novel electrolyte according to claim 1, it is characterised in that addition equivalent to electrolyte total amount 15%~
20% organolithium solution, the concentration of the organolithium solution is 1%~5%.
4. a kind of novel electrolyte according to claim 1, it is characterised in that described lithium alkylide be straight chained alkyl lithium,
One or more in branched alkyl lithium, cycloalkyl lithium and phenyl lithium.
5. a kind of novel electrolyte according to claim 1, it is characterised in that described lithium alkylide is lithium methide, ethyl
Lithium, propyl lithium, isopropyl lithium, n-BuLi, s-butyl lithium, tert-butyl lithium, amyl group lithium, hexyl lithium, cyclohexyl lithium, t-octyl
One kind or several in lithium, n-eicosane base lithium, phenyl lithium, aminomethyl phenyl lithium, butyl phenyl lithium, naphthyl lithium, butylcyclohexyl lithium
Kind.
6. a kind of novel electrolyte according to claim 1, it is characterised in that described alkane is diisopropyl for amido lithium
Amido lithium, dimethyl amido lithium, LHMDS, 1,1,2,2,3,3- hexafluoorpropane -1,3- di-sulfonyl imides
One or more in lithium, lithium hexamethyldisilazide.
7. a kind of novel electrolyte according to claim 1, it is characterised in that the solvent of described organolithium solution is
THF or DME or combination.
8. a kind of novel electrolyte according to claim 1, it is characterised in that described electrolyte is by following component groups
Into：12.5%LiPF6, 30%EC, 21%EMC, 30%DEC, 3%PS and 3.5%VC.
9. the preparation method of a kind of novel electrolyte as described in claim 1-8 is any, it is characterised in that successively including following
Step：
Step 1：Organolithium solution is prepared under anaerobic water-less environment；
Step 2：During organolithium solution added into electrolyte in proportion, stirring obtains novel electrolyte.
10. a kind of lithium battery, it is characterised in that described lithium battery is using the electrolyte as described in claim 1-8 is any.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107293792A (en) * | 2017-08-21 | 2017-10-24 | 宁波诺丁汉大学 | A kind of nonaqueous electrolytic solution and nickelic tertiary cathode material battery |
| CN114361564A (en) * | 2022-01-11 | 2022-04-15 | 清华大学深圳国际研究生院 | Electrolyte and lithium battery |
| CN114497729A (en) * | 2020-11-12 | 2022-05-13 | 山东海科新源材料科技股份有限公司 | Lithium-ion battery and electrolyte for lithium-ion battery |
| WO2022266886A1 (en) * | 2021-06-23 | 2022-12-29 | 宁德时代新能源科技股份有限公司 | Preparation method for sei membrane-like component additive, electrolyte, lithium ion battery, battery module, battery pack, and electric device |
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