CN108134136A - A kind of electrolyte and a kind of secondary cell - Google Patents
A kind of electrolyte and a kind of secondary cell Download PDFInfo
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- CN108134136A CN108134136A CN201711462727.1A CN201711462727A CN108134136A CN 108134136 A CN108134136 A CN 108134136A CN 201711462727 A CN201711462727 A CN 201711462727A CN 108134136 A CN108134136 A CN 108134136A
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- electrolyte
- lithium ion
- ion battery
- bmi
- mmds
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 29
- 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 abstract description 32
- XQUPVDVFXZDTLT-UHFFFAOYSA-N 1-[4-[[4-(2,5-dioxopyrrol-1-yl)phenyl]methyl]phenyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C(C=C1)=CC=C1CC1=CC=C(N2C(C=CC2=O)=O)C=C1 XQUPVDVFXZDTLT-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229920003192 poly(bis maleimide) Polymers 0.000 claims abstract description 32
- 239000008151 electrolyte solution Substances 0.000 claims abstract description 12
- 239000002904 solvent Substances 0.000 claims abstract description 7
- 239000000654 additive Substances 0.000 claims description 11
- 230000000996 additive effect Effects 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical group C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 239000003125 aqueous solvent Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 150000003949 imides Chemical class 0.000 claims 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 39
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 39
- 230000014759 maintenance of location Effects 0.000 abstract description 14
- 238000003860 storage Methods 0.000 abstract description 12
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052744 lithium Inorganic materials 0.000 abstract description 7
- 239000013538 functional additive Substances 0.000 abstract description 2
- 229920000642 polymer Polymers 0.000 abstract description 2
- 230000002195 synergetic effect Effects 0.000 abstract description 2
- 230000000630 rising effect Effects 0.000 abstract 1
- 229910003002 lithium salt Inorganic materials 0.000 description 6
- 159000000002 lithium salts Chemical class 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 239000006230 acetylene black Substances 0.000 description 4
- 239000001768 carboxy methyl cellulose Substances 0.000 description 4
- 229910001290 LiPF6 Inorganic materials 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 2
- 239000005030 aluminium foil Substances 0.000 description 2
- OCKPCBLVNKHBMX-UHFFFAOYSA-N butylbenzene Chemical compound CCCCC1=CC=CC=C1 OCKPCBLVNKHBMX-UHFFFAOYSA-N 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000011267 electrode slurry Substances 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000000643 oven drying Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 2
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- 229910012820 LiCoO Inorganic materials 0.000 description 1
- 229910032387 LiCoO2 Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- -1 methylene ester Chemical class 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007151 ring opening polymerisation reaction Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding 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
-
- 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
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)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of electrolyte and a kind of secondary cell,In the electrolytic solution simultaneously added with N,N'‑(4,4' methylenediphenyls) bismaleimide (BMI) and methane-disulfonic acid methylene ester (MMDS),The electrolyte is applied to each may participate in film forming in anode in lithium ion battery,Functional additive package MMDS and BMI synergistic effects in the present invention,Have both the toughness of polymer and the height of inorganic sulfosalt lead it is ionic,And the film formed after have relatively low impedance,High temperature stability performance is excellent,It is survivable under the high temperature conditions,Therefore solvent can effectively be prevented to consume lithium with reacting for anode,Applied to can be while reducing big multiplying power charging temperature and rising in lithium ion battery,Also the high temperature storage capacity retention ratio of lithium ion battery can be improved,It also is able to significantly improve room temperature cycles performance and high-temperature storage performance under lithium ion battery high-voltage simultaneously.
Description
Technical field
The present invention relates to field of batteries, more particularly, to a kind of electrolyte and a kind of secondary cell.
Background technology
Lithium ion battery because have many advantages, such as it is higher than energy, have extended cycle life, self discharge it is small, be widely used in consumer
In electronic product and energy storage and power battery.In consumer electronics product field, there is the lithium battery of rapid charge characteristic
The mainstream product in the market is increasingly becoming, Fast Charge Battery (abbreviation quick charging battery) is mainly charged by big multiplying power and realized at present, greatly
Multiplying power is easy to charge to cause internal temperature of battery quickly to increase, and deteriorates battery.In addition to this, battery is in storing process
In, particularly under hot conditions, the capacitance loss of inside battery is more serious, and end product usage time is caused to shorten.Thus may be used
See, the Wen Sheng and high temperature storage capacity retention ratio for improving quick charging battery battery become particularly important.
The charging Wen Sheng and high temperature storage capacity retention ratio of lithium ion battery are influenced by factors, wherein, electrolysis
Important component of the liquid as lithium ion battery, having on its performance gravely influences.Therefore, there is an urgent need for a kind of performance is excellent now
While big multiplying power charging temperature liter is reduced, the high temperature storage capacity that can also improve lithium ion battery is kept different electrolyte
Rate.
Invention content
In view of the drawbacks of the prior art, the technical problems to be solved by the invention are to provide a kind of electrolyte and one kind is secondary
Battery.
The technical solution used in the present invention is：
The present invention provides a kind of electrolyte, and comprising solvent, electrolyte and additive, the additive contains N, N'- (4,
4'- methylenediphenyls) bismaleimide and methane-disulfonic acid methylene ester.
Preferably, the mass fraction of the N, N'- (4,4'- methylenediphenyl) bismaleimide in the electrolytic solution is
0.05%~3%.
Further, the mass fraction of the N, N'- (4,4'- methylenediphenyl) bismaleimide in the electrolytic solution
It is 0.1%~2%.
Preferably, the mass fraction of the methane-disulfonic acid methylene ester in the electrolytic solution is 0.01%~10%.
Further, the mass fraction of the methane-disulfonic acid methylene ester in the electrolytic solution is 0.1~3%.
Preferably, the solvent is non-aqueous solvent.
The present invention also provides a kind of secondary cell, comprising negative plate, also comprising above-described electrolyte.
Preferably, the negative plate is graphite cathode piece.
The beneficial effects of the invention are as follows：
N, N'- (4,4'- methylenediphenyls) bismaleimide (BMI) and first are included in electrolyte provided by the invention
Alkane disulfonic acid methylene ester (MMDS) can also can applied in lithium ion battery while big multiplying power charging temperature liter is reduced
The high temperature storage capacity retention ratio of lithium ion battery is improved, while also is able to significantly improve the room under lithium ion battery high-voltage
Warm cycle performance and high-temperature storage performance.Compared to independent addition BMI or MMDS, since the oxidizing potential of MMDS and BMI omits
Film forming is each may participate in less than the oxidizing potential of solvent, therefore in anode, the functional additive package MMDS and BMI in the present invention
Synergistic effect, it is mainly Li to participate in the film component to be formed2SO3And ROSO2Li and BMI ring-opening polymerisations form, which has both polymer
Toughness and inorganic sulfosalt height lead it is ionic, and the film formed after there is relatively low impedance, high temperature stability performance is excellent, in height
It is survivable under the conditions of temperature, therefore solvent can effectively be prevented to consume lithium with reacting for anode；Secondly combined additive MMDS and
BMI can reduce initial anode interface impedance and improve anode interface high-temperature stability, therefore can effectively reduce quick charge temperature
It rises and high temperature storage capacity retention ratio；In addition combined additive MMDS and BMI has good compatibility, and energy with graphite cathode
The protective film for stablizing densification is formed in anode, so as to improve the chemical property of battery.
Specific embodiment
The technique effect of design and the generation of the present invention is clearly and completely described below with reference to embodiment, with
It is completely understood by the purpose of the present invention, feature and effect.Obviously, described embodiment is that the part of the present invention is implemented
Example rather than whole embodiments, based on the embodiment of the present invention, those skilled in the art is not before making the creative labor
Obtained other embodiment is put, belongs to the scope of protection of the invention.
Embodiment 1：The preparation of electrolyte L1#~L12#
It is EC in mass ratio:DEC:PC:FEC=30:50:15:5 uniform mixing EC, DEC, PC and FEC form organic molten
Agent takes fully dry lithium salts LiPF6It is dissolved in above-mentioned organic solvent, obtains a concentration of 1mol/L of lithium salts, then add in
Combined additive BMI and MMDS are uniformly mixed, obtain electrolyte.The structural formula of the BMI is：The structural formula of the MMDS is:
The component relationship of combined additive is as shown in table 1 in electrolyte L1#~L12#.
Table 1
Embodiment 2：The preparation of lithium ion battery B1#~B12#
(1) preparation of positive plate：By cobalt acid lithium (LiCoO2), binding agent (Kynoar), conductive agent (acetylene black) press
It is LiCoO according to weight ratio2: Kynoar: acetylene black=96: mixed at 2: 2 add in N-Methyl pyrrolidone (NMP),
The lower stirring of de-airing mixer effect obtains anode sizing agent to system into uniform shape；Anode sizing agent is evenly applied to thickness as 12 μ
On the aluminium foil of m；Aluminium foil after room temperature is dried is transferred to 120 DEG C of oven drying 1h, then obtains anode by cold pressing, cutting
Piece.
(2) preparation of negative plate：By graphite, acetylene black, thickener sodium carboxymethylcellulose (CMC), binding agent butylbenzene rubber
Glue is graphite: acetylene black: binding agent butadiene-styrene rubber: thickener sodium carboxymethylcellulose (CMC)=95: 2: 2: 1 according to weight ratio
It is mixed, after being added to deionized water, negative electrode slurry is obtained under the stirring action of de-airing mixer stirring；By negative electrode slurry
It is coated uniformly on copper foil；Copper foil is transferred to 120 DEG C of oven drying 1h after room temperature is dried, then by being cold-pressed, cutting
To negative plate.
(3) preparation of lithium ion battery：Positive plate, lithium battery isolation membrane, negative plate are folded in order, make lithium battery every
It is between positive and negative plate from film and plays the role of isolation, then winding obtains naked battery core；Naked battery core is placed in outer packing foil
In, electrolyte L1#~L12# in embodiment 1 is injected into dried battery respectively, by Vacuum Package, standing, change
Into processes such as, shapings, obtain lithium ion battery B1#~B12#, the lithium ion battery finally obtained can be applied to 4.4V and more than
Voltage regime.
Embodiment 3：The cycle performance test of lithium ion battery B1#~B12#
Lithium ion battery B1#~B12# in Example 2 is tested as follows：At 25 DEG C, by lithium from
Sub- battery is with 1C constant-current charges to 4.4V, and then constant-voltage charge to electric current is 0.05C, then with 1C constant-current discharges to 3.0V, at this time
To recycle for the first time, carry out 100 times, 300 times, 500 cycle charging/electric discharges respectively according to above-mentioned cycling condition, calculate respectively
Go out circulating battery 100 times, 300 times, 500 times cycle after capacity retention ratio, wherein, the capacity retention ratio after cycle is according to the following formula
Calculated, the capacity retention ratio after cycle=(discharge capacity after corresponding cycle-index/discharge capacity recycled for the first time) ×
100%, each lithium ion battery after tested obtained relevant test data referring to table 2.
Table 2
From the related data in table 2 it is known that compared to being not added with BMI and MMDS and individually adding single component
The lithium ion battery of (BMI or MMDS) is compared, and the lithium ion battery that combined additive BMI and MMDS are added while of the invention exists
After 100 times, 300 times, 500 cycles, still there is higher capacity retention ratio, the experimental results showed that will simultaneously containing BMI and
The electrolyte of MMDS is added to the cycle performance that lithium ion battery can be improved in lithium ion battery, is particular enable to improve lithium ion
Cycle performance of the battery under the high voltage of more than 4.4V.
Embodiment 4：Thermostability test after lithium ion battery B1#~B12# cycles
Lithium ion battery B1#~B12# in Example 3 after 500 loop tests is surveyed as follows
Examination：It is at 25 DEG C with 0.5C electric current constant-current charges to 4.4V, then using 4.4V constant-voltage charges to electric current as 0.025C
Then battery is placed in 150 DEG C of high temperature furnace and is kept for 1 hour by 4.4V fully charged states, the state of battery, battery after observation test
Not on fire not explode as passing through, 10 batteries of every group of test, percent of pass result is shown in Table 3.
Table 3
From the related data in above-mentioned table 3 it is known that the lithium ion battery for adding BMI and MMDS in the present invention simultaneously follows
Preferable thermal stability is respectively provided with after ring, the results showed that the electrolyte simultaneously containing BMI and MMDS is applied in lithium ion battery
Afterwards, the high-temperature storage performance after lithium ion battery cycle can be improved.
Embodiment 5：The charging temperature of lithium ion battery B1#~B12# rises test
Lithium ion battery B1#~B12# in Example 2 is tested as follows：At 25 DEG C, by battery with
0.5C constant-current discharges are to 3.0V, then with constant pressure after different rate of charge 1,1.5,2,3,5C constant-current charges to 4.4V to electric current
It for 0.05C, so recycles, until each rate of charge is completed, battery surface center is tested by multichannel temperature logger
Temperature, and record.Record to obtain maximum temperature such as the following table 4 under each rate of charge, unit for DEG C.
Table 4
From the data in above-mentioned table 4 it is known that compared to being not added with BMI and MMDS and individually adding single component
Lithium ion battery, at the same add BMI and MMDS to lithium ion battery charging Wen Shengjun have different degrees of improvement, show to contain simultaneously
After the electrolyte for having BMI and MMDS is applied in lithium ion battery, the charging temperature rise model of lithium ion battery can be improved.
Embodiment 6：The capacity retention ratio of lithium ion battery B1#~B12# storages 30 days at 60 DEG C
Lithium ion battery B1#~B12# in Example 2 is tested as follows：With 0.5C electric currents at 25 DEG C
Constant-current charge is discharged to 3.0V to 4.4V, then using 4.4V constant-voltage charges to electric current as 0.05C with 0.5C, records the discharge capacity
For initial battery capacity.It is made to 4.4V, then using 4.4V constant-voltage charges to electric current as 0.05C with 0.5C electric current constant-current charges again
In 4.4V fully charged states, then battery is placed in 60 DEG C of insulating box and is kept for 30 days.Battery is taken out after 30 days, is put with 0.5C
Electricity records the discharge capacity as the capacity after 60 DEG C of storages 30 days, and with 0.5C electric current constant-current charges to 4.4V to 3.0V, then with
4.4V constant-voltage charges to electric current is 0.05C, and 3.0V is discharged to 0.5C, records the discharge capacity as battery recovery capacity, specifically
Shown in experimental result table 5.
Table 5
From the data in table 5 it is known that the lithium ion battery simultaneously added with BMI and MMDS stores 30 days at 60 DEG C
Capacity retention ratio significantly gets a promotion, the experimental results showed that the electrolyte simultaneously containing BMI and MMDS is applied to lithium ion battery
In after, the high temperature storage capacity retention ratio of lithium ion battery can be improved.
Embodiment 7
It is EC in mass ratio:DEC:PC:FEC=30:50:15:5 uniform mixing EC, DEC, PC and FEC form organic molten
Agent takes fully dry lithium salts LiPF6It is dissolved in above-mentioned organic solvent, obtains a concentration of 1mol/L of lithium salts, then add in
Combined additive BMI and MMDS, the mass fractions of the BMI in the electrolytic solution are 0.05%, and the MMDS is in the electrolytic solution
Mass fraction is 10%, is uniformly mixed, obtains electrolyte.
Embodiment 8
It is EC in mass ratio:DEC:PC:FEC=30:50:15:5 uniform mixing EC, DEC, PC and FEC form organic molten
Agent takes fully dry lithium salts LiPF6It is dissolved in above-mentioned organic solvent, obtains a concentration of 1mol/L of lithium salts, then add in
Combined additive BMI and MMDS, the mass fractions of the BMI in the electrolytic solution are 1.5%, the matter of the MMDS in the electrolytic solution
It is 0.01% to measure score, is uniformly mixed, obtains electrolyte.
Claims (8)
1. a kind of electrolyte includes solvent, electrolyte and additive, which is characterized in that the additive contains N, N'- (4,4'-
Methylenediphenyl) bismaleimide and methane-disulfonic acid methylene ester.
2. electrolyte according to claim 1, which is characterized in that the N, N'- (4,4'- methylenediphenyl) span comes
The mass fraction of acid imide in the electrolytic solution is 0.05%~3%.
3. electrolyte according to claim 2, which is characterized in that the N, N'- (4,4'- methylenediphenyl) span comes
The mass fraction of acid imide in the electrolytic solution is 0.1%~2%.
4. according to claim 1-3 any one of them electrolyte, which is characterized in that the methane-disulfonic acid methylene ester is being electrolysed
Mass fraction in liquid is 0.01%~10%.
5. electrolyte according to claim 4, which is characterized in that the matter of the methane-disulfonic acid methylene ester in the electrolytic solution
It is 0.1~3% to measure score.
6. according to claim 1-3,5 any one of them electrolyte, which is characterized in that the solvent is non-aqueous solvent.
7. a kind of secondary cell, includes negative plate, which is characterized in that also comprising claim 1-6 any one of them electrolyte.
8. secondary cell according to claim 7, which is characterized in that the negative plate is graphite cathode piece.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112448035A (en) * | 2020-11-25 | 2021-03-05 | 东莞市天丰电源材料有限公司 | High-voltage lithium ion battery electrolyte and preparation method thereof |
| CN115172662A (en) * | 2022-06-24 | 2022-10-11 | 惠州市豪鹏科技有限公司 | Positive plate and lithium ion battery |
| CN116799308A (en) * | 2023-08-25 | 2023-09-22 | 深圳华驰新能源科技有限公司 | Lithium ion battery and electrolyte thereof |
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| CN106170886A (en) * | 2014-04-03 | 2016-11-30 | 3M创新有限公司 | Additive agent electrolyte for lithium ion battery |
| CN107210486A (en) * | 2015-01-30 | 2017-09-26 | 三菱化学株式会社 | Nonaqueous electrolytic solution and nonaqueous electrolytic solution secondary battery using the same |
| JP2016213103A (en) * | 2015-05-12 | 2016-12-15 | Ｎｅｃエナジーデバイス株式会社 | Lithium ion secondary battery and manufacturing method thereof |
| CN107204485A (en) * | 2017-03-31 | 2017-09-26 | 宁波中车新能源科技有限公司 | A kind of battery capacitor polynary electrolyte of low temperature |
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| CN112448035A (en) * | 2020-11-25 | 2021-03-05 | 东莞市天丰电源材料有限公司 | High-voltage lithium ion battery electrolyte and preparation method thereof |
| CN115172662A (en) * | 2022-06-24 | 2022-10-11 | 惠州市豪鹏科技有限公司 | Positive plate and lithium ion battery |
| CN116799308A (en) * | 2023-08-25 | 2023-09-22 | 深圳华驰新能源科技有限公司 | Lithium ion battery and electrolyte thereof |
| CN116799308B (en) * | 2023-08-25 | 2024-05-24 | 深圳华驰新能源科技有限公司 | Lithium ion battery and electrolyte thereof |
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