CN107180998A - A kind of electrolyte and lithium ion battery - Google Patents
A kind of electrolyte and lithium ion battery Download PDFInfo
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- CN107180998A CN107180998A CN201710457781.0A CN201710457781A CN107180998A CN 107180998 A CN107180998 A CN 107180998A CN 201710457781 A CN201710457781 A CN 201710457781A CN 107180998 A CN107180998 A CN 107180998A
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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
- H01M10/0561—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of inorganic materials only
- H01M10/0562—Solid materials
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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
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- 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
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Abstract
The present invention provides a kind of electrolyte, including the 0.5~4mol/L silane-modified inorganic filler of inorganic lithium salt, 3~15wt% and solvent；Silane used in the silane-modified inorganic filler is YSiX3, wherein, Y is selected from alkyl, oxoalkyl group, amino or phenyl；X is selected from alkyl or alkoxy；One or more of the inorganic filler in silicate, carbonate, carbide, sulfate, sulfide, titanate, oxide, hydroxide and metal inorganic filler used in the silane-modified inorganic filler.Electrolyte in the present invention is a kind of semisolid, quasi-solid electrolyte, the silane-modified alundum (Al2O3) increase liquid electrolyte viscosity of present invention addition, reduces solution mobility, it is to avoid liquid solution easily reveals hidden danger, and improve battery security, and higher voltage can be born.Present invention also offers a kind of lithium ion battery.
Description
Technical field
The invention belongs to technical field of lithium ion, more particularly to a kind of electrolyte and lithium ion battery.
Background technology
Lithium ion battery is the current best chargeable chemical cell of technical performance in the world, with operating voltage height, ratio
Energy is big, have extended cycle life, self discharge is small, memory-less effect, it is pollution-free the advantages of, be widely used in mobile communication, notebook
The fields such as computer, portable dam, electric bicycle.
In the case where people increasingly focus on environmental protection, lithium ion battery is the main of new energy development as energy storage device
Direction, such as Publication No. CN106684448A Chinese patent discloses a kind of preparation method of high-temperature-reslithium lithium battery electrolyte,
Electrolyte service life is longer in the patent, and thermal stability preferably, but still has liquid electrolyte easy-to-leak liquid, inflammable,
Explosive safety issue.
So sight has been invested solid electrolyte by people, but all solid state electrolyte electrical conductivity is low, at room temperature electrochemistry
Poor performance etc., accordingly, it would be desirable to research and develop the good electrolyte of a kind of safe and practicality.
The content of the invention
It is an object of the invention to provide a kind of electrolyte and lithium ion battery, the electrolyte in the present invention is safe,
And excellent electrochemical performance, practicality is good.
The present invention provides a kind of electrolyte, includes the 0.5~4mol/L silane-modified nothing of inorganic lithium salt, 3~15wt%
Machine filler and solvent；
Silane used in the silane-modified inorganic filler is YSiX3, wherein, Y is selected from alkyl, oxoalkyl group, ammonia
Base or phenyl；X is selected from alkyl or alkoxy；
Inorganic filler used in the silane-modified inorganic filler is selected from silicate, carbonate, carbide, sulfuric acid
One or more in salt, sulfide, titanate, oxide, hydroxide and metal inorganic filler.
It is preferred that, silane used in the silane-modified inorganic filler be selected from APTES,
N-2 (aminoethyl) 3- aminopropyl trimethoxysilanes, gamma-aminopropyl-triethoxy-silane, enhanced amino silane, metering system
Acryloxypropylethoxysilane trimethoxy silane, methacryloyloxypropyl methyl dimethoxysilane, dodecyl triethoxysilicane
One or more in alkane, N- decyls triethoxysilane, MTMS and octyltri-ethoxysilane.
It is preferred that, the oxide is in alundum (Al2O3), zirconium dioxide, silica, zinc oxide and titanium dioxide
One or more.
It is preferred that, the concentration of the inorganic lithium salt is 1~4mol/L.
It is preferred that, the inorganic lithium salt includes lithium hexafluoro phosphate, LiBF4, lithium perchlorate, trifluoromethanesulfonic acid lithium, double
Trifluoromethanesulfonimide lithium, double fluorine sulfimide lithiums, four cyanogen lithium borates, di-oxalate lithium borate, difluorine oxalic acid boracic acid lithium and two
One or more in fluorine dimalonic acid lithium borate.
It is preferred that, the mass concentration of the silane-modified inorganic filler is 5~10wt%.
It is preferred that, the solvent includes ethylene carbonate, dimethyl carbonate, dimethyl ether, fluorinated ethylene carbonate, carbonic acid first
One or more in ethyl ester, propene carbonate and diethyl carbonate.
The present invention provides a kind of lithium ion battery, including electrolyte described above.
The present invention provides a kind of electrolyte, including 0.5~4mol/L inorganic lithium salt, solvent and 3~15wt% silane change
The inorganic filler of property；If less than 3% inorganic filler, acupuncture and result of the test of stopping working certainly are undesirable in security performance, are more than
15% inorganic filler is difficult to incorporate basic electrolyte, causes battery impedance to increase, and chemical property is poor.It is described silane-modified
Silane used in inorganic filler is YSiX3, wherein, Y is selected from alkyl, oxoalkyl group, amino or phenyl；X is selected from alkyl or alkane
Epoxide；Inorganic filler used in the silane-modified inorganic filler is selected from silicate, carbonate, carbide, sulfate, sulphur
One or more in compound, titanate, oxide, hydroxide and metal inorganic filler.Electrolyte in the present invention is one
Plant semisolid, quasi-solid electrolyte, the silane-modified alundum (Al2O3) increase liquid electrolyte viscosity of present invention addition, reduction
Solution mobility, it is to avoid liquid solution easily reveals hidden danger, and improves battery security, and can bear higher voltage.Phase
For basic electrolyte, add silane-modified inorganic filler electrochemical window and do not change, add the nickel ion doped at five volts
Positive pole is done, the button cell cycle performance high rate performance that lithium piece does negative pole is good.Test result indicates that, in high-voltage battery,
In the case of not influenceing chemical property, security performance is improved, and does positive pole in Soft Roll ternary material, graphite makees the battery of negative pole
In, in the case that capacity is kept, substantially, security performance is significantly improved acupuncture effect.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is the state diagram of electrolyte in the embodiment of the present invention 1 and comparative example 1；
Fig. 2 is the state before and after soft-package battery pin prick test of the present invention；
Fig. 3 is the cyclic curve before soft-package battery pin prick test of the present invention in 0.1C；
Voltage change curve during the soft-package battery pin prick test that Fig. 4 is made for the electrolyte of comparative example 1 of the present invention；
Voltage change curve during the soft-package battery pin prick test that Fig. 5 is made for the electrolyte of the embodiment of the present invention 2；
Temperature variation curve during the soft-package battery pin prick test that Fig. 6 is made for the electrolyte of comparative example 1 of the present invention；
Temperature variation curve during the soft-package battery pin prick test that Fig. 7 is made for the electrolyte of the embodiment of the present invention 2.
Embodiment
The present invention provides a kind of electrolyte, includes the 0.5~4mol/L silane-modified nothing of inorganic lithium salt, 3~15wt%
Machine filler and solvent；
Silane used in the silane-modified inorganic filler is YSiX3, wherein, Y is selected from alkyl, oxoalkyl group, ammonia
Base or phenyl；X is selected from alkyl or alkoxy；
Inorganic filler used in the silane-modified inorganic filler is selected from silicate, carbonate, carbide, sulfuric acid
One or more in salt, sulfide, titanate, oxide, hydroxide and metal inorganic filler.
Electrolyte in the present invention is safe, and excellent electrochemical performance.
In the present invention, the inorganic lithium salt preferably includes lithium hexafluoro phosphate (LiPF6), LiBF4 (LiBF4), it is high
Lithium chlorate (LiClO4), trifluoromethanesulfonic acid lithium (LiCF3SO3), double trifluoromethanesulfonimide lithiums (LiTFSI), double fluorine sulphonyl it is sub-
Amine lithium (LiFSI), four cyanogen lithium borates (LiB (CN)4), di-oxalate lithium borate (LiBOB), difluorine oxalic acid boracic acid lithium (LiDFOB) and
One or more in difluoro dimalonic acid lithium borate (LiBFMB), it is preferred to use lithium hexafluoro phosphate；The inorganic lithium salt is in electricity
It is 0.5~4mol/L, more preferably preferably 1~3mol/L, 1~2mol/L to solve the molar concentration in matter.
In the present invention, the mass fraction of the silane-modified inorganic filler in the electrolyte is 3~15%, is preferably
5~10%, more preferably 7~8%.In the present invention, silane used in the silane-modified inorganic filler is YSiX3,
Wherein, Y is selected from alkyl, oxoalkyl group, amino or phenyl；X is selected from alkyl or alkoxy, is preferably selected from the ethoxy of 3- aminopropyls three
Base silane (KH-550), N-2 (aminoethyl) 3- aminopropyl trimethoxysilanes (KH-792), gamma-aminopropyl-triethoxy-silane,
Enhanced amino silane (KH-2170), methacryloxypropyl trimethoxy silane, methacryloyloxypropyl methyl
Dimethoxysilane, dodecyl triethoxysilane (XH-10), N- decyls triethoxysilane, MTMS
With the one or more in octyltri-ethoxysilane；Inorganic filler used in the silane-modified inorganic filler is selected from silicon
One kind in hydrochlorate, carbonate, carbide, sulfate, sulfide, titanate, oxide, hydroxide and metal inorganic filler
Or it is several, wherein, the oxide in alundum (Al2O3), zirconium dioxide, silica, zinc oxide and titanium dioxide one
Plant or several.
Present invention preferably employs the high temperature alumina through the silane-modified mistake of octyl group, three silane-modified oxidations two of the octyl group
The specific surface area of aluminium is 85~115m2/g；PH value (the 4% dispersion concentration condition of the silane-modified alundum (Al2O3) of the octyl group
Under) it is preferably 3.0~5.0, more preferably 4.0；The loss on drying of the silane-modified alundum (Al2O3) of the octyl group is (2 at 105 DEG C
Hour)≤2%；The carbon content of the silane-modified alundum (Al2O3) of the octyl group is preferably 3.0~4.5wt%, and more preferably 3.5
~4.0wt%；The tap density of the silane-modified alundum (Al2O3) of the octyl group is preferably 45~55g/L, more preferably 50g/
L；In the silane-modified alundum (Al2O3) of the octyl group alundum (Al2O3) mass fraction preferably >=95%；The octyl group silane changes
150 DEG C of the heat decomposition temperature ＞ of the alundum (Al2O3) of property.Specifically, in an embodiment of the present invention, can be used and win wound industry collection
The silane-modified alundum (Al2O3) of the models of AEROXIDE Alu C 805 of group (Evonik).In actual production,
The products of AEROXIDE Alu C 805 are usually utilized to improve the mobility of powdery paints or toner, or used in plastic products
Middle prevention adhesion and caking, the present invention are used it in electrolyte, reduce the mobility of liquid electrolyte, are improving lithium electricity
Excellent chemical property is also assures that while the security of pond.
In the present invention, the solvent preferably includes ethylene carbonate (EC), dimethyl carbonate (DMC), dimethyl ether
(DME), in fluorinated ethylene carbonate (FEC), methyl ethyl carbonate (EMC), PC (propene carbonate) and DEC (diethyl carbonate)
It is one or more of.The present invention can use a kind of solvent therein, and the two kinds of solvents that may also be used in which are with 1:1 or 3:7 proportioning
Mixing, such as ethylene carbonate：Dimethyl carbonate is 3:The mixed solvent of 7 (volume ratios), the three kinds of solvents that may also be used in which with
1:1:1 proportioning mixing.
The present invention preferably prepares above-mentioned electrolyte according to following steps：
Except water solvent in add inorganic lithium salt, then adding dried silane-modified inorganic filler, it is quiet
Put 1~3 hour, obtain electrolyte；
The concentration of the inorganic lithium salt in the electrolyte is 0.5~4mol/L；
The mass fraction of the silane-modified inorganic filler in the electrolyte is 3~15%；
In the present invention, the species of each raw material, source and consumption and the above species of each raw material, source and consumption one
Cause, will not be repeated here.
Solvent is removed water present invention preferably employs dry molecular sieve, then 24 hours or so is stood, was removed
The solvent of water；The drying temperature of the silane-modified alundum (Al2O3) is preferably 110~140 DEG C, more preferably 120~130
℃；The time of the drying is preferably more than 12 hours.The inorganic lithium salt is preferably gradually added into by the present invention on a small quantity several times.
Present invention also offers a kind of lithium ion battery, the lithium ion battery includes electrolyte above, the present invention
There is no special limitation to the species of the lithium ion battery, can be solid state battery, such as cobalt acid lithium, LiMn2O4, LiFePO4
It is single or multiple compound as positive pole with ternary material and rich lithium material, with carbon negative pole material, tin base cathode material, transition gold
Category oxide cathode material or nanometer oxide material etc. are used as negative material；Soft-package battery can also be made.
The present invention provides a kind of electrolyte, includes the 0.5~4mol/L silane-modified nothing of inorganic lithium salt, 3~15wt%
Machine filler and solvent；Silane used in the silane-modified inorganic filler is YSiX3, wherein, Y is selected from alkyl, oxolanyl alkane
Base, amino or phenyl；X is selected from alkyl or alkoxy；Inorganic filler used in the silane-modified inorganic filler is selected from silicon
One kind in hydrochlorate, carbonate, carbide, sulfate, sulfide, titanate, oxide, hydroxide and metal inorganic filler
Or it is several.Electrolyte in the present invention is a kind of semisolid, quasi-solid electrolyte, three silane-modified oxidations two of present invention addition
Aluminium increases liquid electrolyte viscosity, reduces solution mobility, it is to avoid liquid solution easily reveals hidden danger, and improves cell safety
Property, and higher voltage can be born.Test result indicates that, in high-voltage battery, the situation of chemical property is not influenceed
Under, security performance is improved, and does positive pole in Soft Roll ternary material, graphite is done in the battery of negative pole, in the case that capacity is kept, acupuncture
Substantially, security performance is significantly improved effect.
A kind of electrolyte provided with reference to embodiments the present invention to further illustrate the present invention and its preparation side
Method is described in detail, but can not be understood as limiting the scope of the present invention.
In the examples below, silane-modified alundum (Al2O3) is using win wound industrial group (Evonik)
The products of AEROXIDE Alu C 805.
Embodiment 1
First ethylene carbonate (EC) and dimethyl carbonate (DMC) are removed water with dried molecular sieve respectively, 24 are stood small
When or so it is standby；
Silane-modified alundum (Al2O3) is dried more than 12 hours at 130 DEG C, it is standby；
With volume ratio EC:DMC=3:7 weigh organic solvent, add lithium hexafluoro phosphate, are well mixed, make lithium hexafluoro phosphate
Concentration is 1mol/L；Then above-mentioned dried silane-modified alundum (Al2O3) is added, it is 3wt% to make its content, obtains electricity
Xie Zhi, by self-extinguishing time experiment test, the burning time of electrolyte is 26.94s g-1。
Embodiment 2
Method according to embodiment 1 prepares electrolyte, unlike, the content of silane-modified alundum (Al2O3) is
10wt%, by self-extinguishing time experiment test, the burning time of electrolyte is 17.36s g-1。
Embodiment 3
Method according to embodiment 1 prepares electrolyte, unlike, the content of silane-modified alundum (Al2O3) is
15wt%, by self-extinguishing time experiment test, the burning time of electrolyte is 10.87s g-1.
Embodiment 4
Method according to embodiment 1 prepares electrolyte, unlike, the concentration of lithium hexafluoro phosphate is 0.5mol/L, is passed through
Self-extinguishing time experiment test, the burning time of electrolyte is 28.92s g-1。
Embodiment 5
Method according to embodiment 5 prepares electrolyte, unlike, the content of silane-modified alundum (Al2O3) is
10wt%, by self-extinguishing time experiment test, the burning time of electrolyte is 19.28s g-1。
Embodiment 6
Method according to embodiment 5 prepares electrolyte, unlike, the content of silane-modified alundum (Al2O3) is
15wt%, by self-extinguishing time experiment test, the burning time of electrolyte is 12.44s g-1。
Embodiment 7
Method according to embodiment 1 prepares electrolyte, unlike, silane-modified alundum (Al2O3) lithium hexafluoro phosphate
Concentration is 4mol/L, by self-extinguishing time experiment test, and the burning time of electrolyte is 17.48s g-1。
Embodiment 8
Method according to embodiment 7 prepares electrolyte, unlike, the content of silane-modified alundum (Al2O3) is
10wt%, by self-extinguishing time experiment test, the burning time of electrolyte is 14.55s g-1。
Embodiment 9
Method according to embodiment 7 prepares electrolyte, unlike, the content of silane-modified alundum (Al2O3) is
15wt%, by self-extinguishing time experiment test, the burning time of electrolyte is 9.57s g-1。
Embodiment 10
First ethylene carbonate (EC) and dimethyl carbonate (DMC) are removed water with dried molecular sieve respectively, 24 are stood small
When or so it is standby；
Silane-modified silica is dried more than 12 hours at 130 DEG C, it is standby；
With volume ratio EC:DMC=3:7 weigh organic solvent, add lithium hexafluoro phosphate, are well mixed, make lithium hexafluoro phosphate
Concentration is 1mol/L；Then above-mentioned dried silane-modified silica is added, it is 3wt% to make its content, is electrolysed
Matter, silane-modified silica can be dissolved into electrolyte, by self-extinguishing time experiment test, and the burning time of electrolyte is
17.11s g-1。
Embodiment 11
Method according to embodiment 10 prepares electrolyte, unlike, the content of silane-modified silica is
10wt%, by self-extinguishing time experiment test, the burning time of electrolyte is 15.28s g-1。
Embodiment 12
Method according to embodiment 10 prepares electrolyte, unlike, the content of silane-modified silica is
15wt%, by self-extinguishing time experiment test, the burning time of electrolyte is 15.55s g-1.
Embodiment 13
Method according to embodiment 10 prepares electrolyte, unlike, the concentration of lithium hexafluoro phosphate is 0.5mol/L, is passed through
Self-extinguishing time experiment test, the burning time of electrolyte is 25.32s g-1。
Embodiment 14
Method according to embodiment 13 prepares electrolyte, unlike, the content of silane-modified silica is
10wt%, by self-extinguishing time experiment test, the burning time of electrolyte is 23.23s g-1。
Embodiment 15
Method according to embodiment 13 prepares electrolyte, unlike, the content of silane-modified silica is
15wt%, by self-extinguishing time experiment test, the burning time of electrolyte is 20.52s g-1。
Embodiment 16
Method according to embodiment 10 prepares electrolyte, unlike, the concentration of lithium hexafluoro phosphate is 4mol/L, by certainly
Time experiment test is put out, the burning time of electrolyte is 11.18s g-1。
Embodiment 17
Method according to embodiment 16 prepares electrolyte, unlike, the content of silane-modified silica is
10wt%, by self-extinguishing time experiment test, the burning time of electrolyte is 10.91s g-1。
Embodiment 18
Method according to embodiment 16 prepares electrolyte, unlike, the content of silane-modified silica is
15wt%, by self-extinguishing time experiment test, the burning time of electrolyte is 10.65s g-1。
Comparative example 1
Method according to embodiment 1 prepares electrolyte, unlike, without silane-modified in the electrolyte of this comparative example
Alundum (Al2O3).
Referring to Fig. 1, Fig. 1 is the state diagram of electrolyte in the embodiment of the present invention 1 and comparative example 1, and a) figure is two kinds of electrolyte
Just place state, b) figure is the state of two kinds of electrolyte upside downs.As seen from Figure 1, the electrolyte in comparative example 1
For flowable liquid electrolyte, the electrolyte in embodiment 1 is not flowable solid electrolyte.
The present invention is also tested to the burning time of these three electrolyte, the electrolyte burning time in comparative example 1
For 84.12sg-1, the burning time of electrolyte is 17.36sg in embodiment 1-1.Burning time is shorter, illustrates the security of battery
Can be higher.
The pin prick test of soft-package battery
Electrolyte in embodiment 2 and comparative example 1 is used in soft-package battery by the present invention, and positive pole is done with 10 layers of NCM622,
Graphite does negative pole, does acupuncture experiment, and effect is obvious.Here it is close with quality, number of plies identical positive plate, negative plate, strictly
The soft-package battery made according to industrial requirements.Raw material specification is referring to table 1, and table 1 is soft-package battery raw material proportioning of the present invention.It is made
Soft-package battery parameter such as table 2, table 2 is the specifications parameter of soft-package battery of the present invention.
The soft-package battery raw material proportioning of the present invention of table 1
The specifications parameter of the soft-package battery of the present invention of table 2
The present invention is according to GB/T 31485-2015 power accumulator safety requirements used for electric vehicle and test method to above-mentioned
Two kinds of soft-package batteries have carried out pin prick test, as a result as shown in Fig. 2~7, wherein, Fig. 2 is soft-package battery pin prick test of the present invention
Front and rear state, as seen from Figure 2, the soft-package battery that electrolyte is made in comparative example 1 are on fire after pin prick test
Explode, the soft-package battery that electrolyte is made in the embodiment of the present invention 2 is not on fire after pin prick test not to explode, and security performance is high.
Fig. 3 is the cyclic curve before soft-package battery pin prick test of the present invention in 0.1C, as seen from Figure 4, acupuncture examination
Before testing, the cycle performance of two kinds of soft-package batteries is similar.
Fig. 4 be the electrolyte of comparative example 1 of the present invention be made soft-package battery pin prick test when voltage change curve, Fig. 5 is
Voltage change curve during the soft-package battery pin prick test that the electrolyte of the embodiment of the present invention 2 is made.It can be seen from Fig. 4~5 originally
Voltage is substantially unchanged in soft-package battery acupuncture course in inventive embodiments 2, and the Soft Roll electricity that electrolyte is made in comparative example 1
Pond voltage in acupuncture course drastically declines, and illustrates that battery performance is unstable, safety coefficient is low.
Fig. 6 be the electrolyte of comparative example 1 of the present invention be made soft-package battery pin prick test when temperature variation curve, Fig. 7 is
Temperature variation curve during the soft-package battery pin prick test that the electrolyte of the embodiment of the present invention 2 is made.It can be seen from Fig. 6~7 originally
Temperature change only has more than ten degrees Celsius in soft-package battery acupuncture course in inventive embodiments 2, and intensity of variation is smaller, and comparative example
The soft-package battery that electrolyte is made in 1 temperature change value in acupuncture course is up to 300 DEG C, and temperature drastically increase and under
Drop, illustrates that battery performance is unstable, safety coefficient is low.
Electrolyte in the present invention it can be seen from above-mentioned experiment not only has the excellent electrification suitable with liquid electrolyte
Performance is learned, is a kind of safety and practical electrolyte while also having had the high security of solid electrolyte concurrently.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (8)
1. a kind of electrolyte, including the 0.5~4mol/L silane-modified inorganic filler of inorganic lithium salt, 3~15wt% and solvent；
Silane used in the silane-modified inorganic filler is YSiX3, wherein, Y is selected from alkyl, oxoalkyl group, amino or benzene
Base；X is selected from alkyl or alkoxy；
Inorganic filler used in the silane-modified inorganic filler is selected from silicate, carbonate, carbide, sulfate, sulphur
One or more in compound, titanate, oxide, hydroxide and metal inorganic filler.
2. electrolyte according to claim 1, it is characterised in that silane used in the silane-modified inorganic filler
Selected from APTES, N-2 (aminoethyl) 3- aminopropyl trimethoxysilanes, gamma-aminopropyl-triethoxy
Silane, enhanced amino silane, methacryloxypropyl trimethoxy silane, methacryloyloxypropyl methyl diformazan
TMOS, dodecyl triethoxysilane, N- decyls triethoxysilane, MTMS and the ethoxy of octyl group three
One or more in base silane.
3. electrolyte according to claim 1, it is characterised in that the oxide be selected from alundum (Al2O3), zirconium dioxide,
One or more in silica, zinc oxide and titanium dioxide.
4. electrolyte according to claim 1, it is characterised in that the concentration of the inorganic lithium salt is 1~4mol/L.
5. electrolyte according to claim 1, it is characterised in that the inorganic lithium salt includes lithium hexafluoro phosphate, tetrafluoro boron
It is sour lithium, lithium perchlorate, trifluoromethanesulfonic acid lithium, double trifluoromethanesulfonimide lithiums, double fluorine sulfimide lithiums, four cyanogen lithium borates, double
One or more in Lithium bis (oxalate) borate, difluorine oxalic acid boracic acid lithium and difluoro dimalonic acid lithium borate.
6. electrolyte according to claim 1, it is characterised in that the mass concentration of the silane-modified inorganic filler is
5~10wt%.
7. electrolyte according to claim 1, it is characterised in that the solvent include ethylene carbonate, dimethyl carbonate,
One or more in dimethyl ether, fluorinated ethylene carbonate, methyl ethyl carbonate, propene carbonate and diethyl carbonate.
8. a kind of lithium ion battery, including the electrolyte described in claim 1~7 any one.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110212241A (en) * | 2019-06-12 | 2019-09-06 | 哈尔滨工业大学 | A kind of solid electrolyte membrane and its preparation process and application |
| CN110867624A (en) * | 2019-10-15 | 2020-03-06 | 湖南博信新能源科技有限公司 | Method for recycling lithium battery electrolyte |
| WO2022160464A1 (en) * | 2021-01-27 | 2022-08-04 | 上海奥威科技开发有限公司 | Lithium ion electrolyte, preparation method therefor and application thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110212241A (en) * | 2019-06-12 | 2019-09-06 | 哈尔滨工业大学 | A kind of solid electrolyte membrane and its preparation process and application |
| CN110867624A (en) * | 2019-10-15 | 2020-03-06 | 湖南博信新能源科技有限公司 | Method for recycling lithium battery electrolyte |
| CN110867624B (en) * | 2019-10-15 | 2023-06-27 | 湖南法恩莱特新能源科技有限公司 | Method for recycling lithium battery electrolyte |
| WO2022160464A1 (en) * | 2021-01-27 | 2022-08-04 | 上海奥威科技开发有限公司 | Lithium ion electrolyte, preparation method therefor and application thereof |
| US11881557B2 (en) | 2021-01-27 | 2024-01-23 | Shanghai Aowei Technology Development Co., Ltd. | Lithium ion electrolyte, preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107180998B (en) | 2019-09-24 |
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