CN106784995A - Electrolyte and its application and lithium ion battery - Google Patents
Electrolyte and its application and lithium ion battery Download PDFInfo
- Publication number
- CN106784995A CN106784995A CN201710022234.XA CN201710022234A CN106784995A CN 106784995 A CN106784995 A CN 106784995A CN 201710022234 A CN201710022234 A CN 201710022234A CN 106784995 A CN106784995 A CN 106784995A
- Authority
- CN
- China
- Prior art keywords
- electrolyte
- ion battery
- carbonate
- lithium ion
- lithium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- H01M10/052—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
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
- H01M4/622—Binders being polymers
- H01M4/623—Binders being polymers fluorinated polymers
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (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 relates to Material Field, a kind of electrolyte and its application and lithium ion battery are specifically disclosed, the electrolyte contains：Main salt, organic ester, organic additive and IA races metallic element halogen and/or lithium carbonate.The lithium ion battery includes positive electrode, negative material, barrier film and electrolyte；The electrolyte is above-mentioned electrolyte.The problem that battery is unable to fast charging and discharging under big multiplying power current condition and can not effectively discharge in low temperature environment is can solve the problem that as battery material using electrolyte of the invention.
Description
Technical field
The present invention relates to field of lithium ion battery, in particular it relates to electrolyte and its application and lithium ion battery.
Background technology
Be specify that again in " 13 " national strategy new industry development plan new-energy automobile, new energy and
The strategic position of the green low-carbon industry such as energy-conserving and environment-protective, China's electrokinetic cell field will be continuously obtained huge development, wherein phosphorus
Sour iron lithium ion battery is subject to extensive use with its excellent cyclicity, security and environmental protection.But traditional phosphoric acid
Iron lithium can not meet new-energy automobile power battery use requirement gradually because of its relatively low ionic mobility and electronic conductivity,
It is mainly reflected in：1st, high rate charge-discharge poor-performing, in high rate charge-discharge, inside battery polarization increases lithium ion battery
Plus, internal resistance increase, temperature rise is very fast, is even short-circuited when serious, there is larger potential safety hazard.2nd, low temperature performance is poor,
Compared to normal temperature and hot environment, under low temperature environment, ionic mobility and conductance the becoming with the order of magnitude of ferric phosphate lithium cell
Gesture declines, and causes the decline of cell discharge voltage platform, causes the reduction of battery capacity can not put electricity even.How phosphorus is realized
Sour iron lithium ion battery under the big multiplying power current conditions under fast charging and discharging and low temperature environment effectively electric discharge with as current
Technical staff's urgent problem.
The content of the invention
It is an object of the invention to provide a kind of electrolyte, electricity is can solve the problem that as battery material using electrolyte of the invention
Pond is unable to fast charging and discharging and the problem that can not be effectively discharged in low temperature environment under big multiplying power current condition.
To achieve these goals, the invention provides a kind of electrolyte, the electrolyte contains：Main salt, organic ester, have
Machine additive and IA races metallic element halogen and/or lithium carbonate.
Application present invention also offers electrolyte in battery material.
Present invention also offers a kind of lithium ion battery.
By above-mentioned technical proposal, the invention provides a kind of electrolyte, the electrolyte contains：Main salt, organic ester, have
Machine additive and IA races metallic element halogen and/or lithium carbonate, the electrolyte enable to battery at big times as battery material
Fast charging and discharging and can effectively be discharged in low temperature environment under rate current condition；Present invention also offers a kind of lithium-ion electric
Pond, the lithium ion battery includes positive electrode, negative material, barrier film and electrolyte；The electrolyte is above-mentioned electrolyte,
Preferably, positive electrode includes modified LiFePO4, and the modified phosphate iron lithium that the method provided by the present invention is obtained possesses
Ionic mobility higher and electronic conductivity, it is engaged with electrolyte, can improve the charge and discharge of obtained lithium ion battery
Electrical property, reduces the polarization of inside battery；Lithium ion battery fast charging and discharging under big multiplying power electric current can be caused simultaneously, low
Also excellent charge-discharge performance can be kept under warm environment.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute the part of specification, with following tool
Body implementation method is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the lithium ion battery 8C rate charge-discharge curves prepared according to the method for the embodiment of the present invention 1；
Fig. 2 is discharged under charging 5C multiplying powers under the lithium ion battery 1C multiplying powers prepared according to the method for the embodiment of the present invention 1
Cycle performance curve；
Fig. 3 is that 5C low temperature multiplying power is put at a temperature of -20 DEG C according to the lithium ion battery of the method preparation of the embodiment of the present invention 1
Electric curve.
Brief description of the drawings
1- discharge curve 2- charging curves
Specific embodiment
Specific embodiment of the invention is described in detail below.It should be appreciated that described herein specific
Implementation method is merely to illustrate and explain the present invention, and is not intended to limit the invention.
The invention provides a kind of electrolyte, the electrolyte contains：Main salt, organic ester, organic additive and IA races gold
Category element halogen and/or lithium carbonate.
It is of the invention it is a kind of preferred embodiment in, in order to further improve above-mentioned electrolyte as battery material
Performance, improves the discharge capability under the charging and discharging capabilities and low temperature environment of battery, and relative to 1L electrolyte, the content of main salt is 1-
1.15mol/L；
On the basis of the gross weight of electrolyte, the content of organic ester is 60-90 weight %, the content of organic additive is
The content of 0.5-2.5 weight %, IA race's metallic element halogens and/or lithium carbonate is 0.5-5 weight %.
It is of the invention it is a kind of preferred embodiment in, organic ester be ethylene carbonate, diethyl carbonate, methyl ethyl carbonate
One or more of ester, propene carbonate and dimethyl carbonate；And/or organic additive is vinylene carbonate, fluoro ethylene
One or more in alkene ester, sulfurous ethene acid esters and vinylethylene carbonate；IA races metallic elements halogen be sodium chloride and/or
Potassium chloride.
In order to further improve performance of the above-mentioned electrolyte as battery material, the charging and discharging capabilities and low temperature of battery are improved
Discharge capability under environment, the main salt is lithium hexafluoro phosphate；On the basis of the gross weight of electrolyte, the organic ester includes
The methyl ethyl carbonate of the ethylene carbonate, the diethyl carbonate of 25-35 weight % and 25-35 weight % of 25-35 weight %；It is described
IA races metallic element halogen is sodium chloride.
Present invention also offers a kind of lithium ion battery, the lithium ion battery include positive electrode, negative material, barrier film and
Above-mentioned electrolyte；The electrolyte is applied in lithium ion battery, can improve the charging and discharging capabilities of lithium ion battery, and in low temperature
The discharge capability of battery can be improved under environment.
It is of the invention it is a kind of preferred embodiment in, the positive electrode includes modified phosphate iron lithium, described modified
The preparation method of LiFePO4 includes：LiFePO4, nitrogenous Graphene and organic solvent are mixed, is carried out after drying at the first heat
Reason.
It is of the invention it is a kind of preferred embodiment in, in order to improve the ionic mobility of obtained modified phosphate iron lithium
And electronic conductivity, the preparation process of nitrogenous Graphene includes：Graphene oxide and urea are mixed, is optionally done
It is dry, the second heat treatment is then carried out, obtain nitrogenous Graphene.
It is of the invention it is a kind of preferred embodiment in, in order to further increase the performance of modified phosphate iron lithium so that
Itself and electrolysis liquid phase can further improve the charge-discharge performance and low temperature performance of battery, preferably graphene oxide and urea
It is in molar ratio 1：The ratio of 1-1.5 is mixed, and nitrogenous Graphene is 1 with LiFePO4 in mass ratio：5-20 is mixed.
According to the present invention, optional wider range of the species of the organic solvent can make graphene oxide and urea mixed
It is combined into organic solvent that is homogeneous and not chemically reacting and may be incorporated for the present invention, for example, ethylene glycol, ethanol and propane diols
In one or more.
It is of the invention it is a kind of preferred embodiment in, the D50 of preferably described modified phosphate iron lithium is 2-5 μm, its ratio
Surface area is 15-25m2/g；The modified phosphate iron lithium for obtaining possesses less meso-position radius and specific surface area so that modified phosphate iron
Lithium possesses ionic mobility and electronic conductivity higher.
In above-mentioned lithium ion battery, the positive electrode includes：Positive active material, bonding agent and conductive agent；It is described
Bonding agent can be the battery bonding agent that the those skilled in the art such as Kynoar, butadiene-styrene rubber commonly use, and conductive agent can foundation
Prior art is selected, for the present invention, preferably in carbon black, electrically conductive graphite, acetylene black, carbon nano-fiber and CNT
One or more.
In above-mentioned lithium ion battery, the negative material includes graphite, butadiene-styrene rubber, conductive agent and carboxymethylcellulose calcium
Sodium；Wherein, conductive agent for example can be the one kind or many in carbon black, electrically conductive graphite, acetylene black, carbon nano-fiber and CNT
Kind, barrier film for example can be the one kind in cellulosic separator, TPO ceramic membrane or polyester non-woven fabric ceramic diaphragm.
It is described to change relative to the positive electrode of 100 weight portions in order to further improve the performance of obtained lithium ion battery
Property LiFePO4 consumption be 92-97 weight portions, the consumption of the Kynoar is 1.5-4 weight portions, the conductive agent
Consumption is 1.5-4 weight portions；Relative to the negative material of 100 weight portions, the consumption of the graphite is 91-96 weight portions, described
The consumption of butadiene-styrene rubber is 2-4 weight portions, and the consumption of the conductive agent is 1-3 weight portions, the use of the sodium carboxymethylcellulose
It is 1-2 weight portions to measure.
In following examples, Kynoar for the trade mark that provides of plasticizing Co., Ltd of Suzhou De Shi sections be 1008 it is commercially available
Product.
Embodiment 1
By graphene oxide and urea mixing, (graphene oxide is 1 with the mol ratio of urea：1.2), it is dried,
Then the second heat treatment (temperature is 700 DEG C, and the time is 1.5h) is carried out, nitrogenous Graphene is obtained；By LiFePO4, described nitrogenous
(nitrogenous Graphene is 1 with LiFePO4 in mass ratio for Graphene and ethylene glycol mixing：10 are mixed), carry out first after drying
Heat treatment (temperature is 700 DEG C, and the time is 1.5h), (D50 of the modified phosphate iron lithium for obtaining is 3.2 μ to obtain modified phosphate iron lithium
M, its specific surface area is 20m2/g)；
Using lithium ion battery obtained in above-mentioned modified phosphate iron lithium, the battery includes positive electrode, negative material, fiber
Plain barrier film and electrolyte, the positive electrode of the battery include modified phosphate iron lithium, Kynoar and carbon black, the negative pole of the battery
Material includes graphite, butadiene-styrene rubber, electrically conductive graphite and sodium carboxymethylcellulose；Wherein, the consumption of positive electrode is 100g (its
In, the consumption of modified phosphate iron lithium is 95g, and the consumption of Kynoar is 2.5g, and the consumption of carbon black is 2.5g)；Negative material
Consumption for 100g, (wherein, the consumption of the graphite is 93g, and the consumption of the butadiene-styrene rubber is 3g, the use of the electrically conductive graphite
It is 2g to measure, and the consumption of the sodium carboxymethylcellulose is 2g).
Wherein, electrolyte is 1L, including concentration is the lithium hexafluoro phosphate of 1mol/L；Ethylene carbonate, 25 of 25 weight %
The methyl ethyl carbonate of the diethyl carbonate of weight %, 25 weight %；The lithium carbonate of 0.5 weight % sodium chloride and 0.5 weight %.
The preparation of above-mentioned lithium ion battery is prepared using prior art, and carries out performance to obtained lithium ion battery
Test, its result is shown in Fig. 1-3.
Embodiment 2
By graphene oxide and urea mixing, (graphene oxide is 1 with the mol ratio of urea：1), optionally carry out
Dry, then carry out the second heat treatment (temperature is 500 DEG C, and the time is 1h), obtain nitrogenous Graphene；By LiFePO4, described
(nitrogenous Graphene is 1 with LiFePO4 in mass ratio for nitrogenous Graphene and ethylene glycol mixing：5 are mixed), carried out after drying
First heat treatment (temperature is 500 DEG C, and the time is 1h), (D50 of the modified phosphate iron lithium for obtaining is 2 μ to obtain modified phosphate iron lithium
M, its specific surface area is 15m2/g)；
Using lithium ion battery obtained in above-mentioned modified phosphate iron lithium, the battery includes positive electrode, negative material, polyene
Hydro carbons ceramic membrane and electrolyte, the positive electrode of the battery include modified phosphate iron lithium, Kynoar and carbon black, the battery
Negative pole include graphite, butadiene-styrene rubber, electrically conductive graphite and sodium carboxymethylcellulose；Wherein, the consumption of positive electrode is 100g (its
In, the consumption of the modified phosphate iron lithium is 92g, and the consumption of the Kynoar is 4g, and the consumption of the carbon black is 4g)；
The consumption of negative material is that (wherein, the consumption of the graphite is 91g to 100g, and the consumption of the butadiene-styrene rubber is 4g, the conduction
The consumption of graphite is 3g, and the consumption of the sodium carboxymethylcellulose is 2g).
Wherein, electrolyte is 1L, including concentration is the lithium hexafluoro phosphate of 1.15mol/L；The ethylene carbonate of 35 weight %,
The methyl ethyl carbonate of the diethyl carbonate of 35 weight %, 35 weight %；The lithium carbonate of 5 weight % sodium chloride and 5 weight %.
The preparation of above-mentioned lithium ion battery is prepared using prior art.
Embodiment 3
By graphene oxide and urea mixing, (graphene oxide is 1 with the mol ratio of urea：1.5), optionally enter
Row drying, then carries out the second heat treatment (temperature is 900 DEG C, and the time is 2.5h), obtains nitrogenous Graphene；By LiFePO4,
(nitrogenous Graphene is 1 with LiFePO4 in mass ratio for the nitrogenous Graphene and ethylene glycol mixing：20 are mixed), after drying
Carry out the first heat treatment (temperature be 900 DEG C, the time is 2.5h), obtain modified phosphate iron lithium (the modified phosphate iron lithium for obtaining
D50 is 5 μm, and its specific surface area is 25m2/g)；
Using lithium ion battery obtained in above-mentioned modified phosphate iron lithium, the battery includes positive electrode, negative material, polyester
Non-woven fabrics ceramic diaphragm and electrolyte, the positive electrode of the battery include modified phosphate iron lithium, Kynoar and carbon black, the electricity
The negative pole in pond includes graphite, butadiene-styrene rubber, electrically conductive graphite and sodium carboxymethylcellulose；Wherein, the consumption of positive electrode is 100g
(wherein, the consumption of the modified phosphate iron lithium is 97g, and the consumption of the Kynoar is 1.5g, and the consumption of the carbon black is
1.5g)；The consumption of negative material is that (wherein, the consumption of the graphite is 96g to 100g, and the consumption of the butadiene-styrene rubber is 2g, institute
The consumption of electrically conductive graphite is stated for 1g, the consumption of the sodium carboxymethylcellulose is 1g).
Wherein, electrolyte is 1L, including concentration is the lithium hexafluoro phosphate of 1.05mol/L；The ethylene carbonate of 30 weight %,
The methyl ethyl carbonate of the diethyl carbonate of 30 weight %, 30 weight %；The lithium carbonate of 2 weight % sodium chloride and 2 weight %.
The preparation of above-mentioned lithium ion battery is prepared using prior art.
Embodiment 4
A kind of lithium ion battery, the battery includes positive electrode, negative material, cellulosic separator and electrolyte, the battery
Positive electrode include LiFePO4, Kynoar and carbon black, the negative pole of the battery includes graphite, butadiene-styrene rubber, conductive stone
Ink and sodium carboxymethylcellulose；Wherein, the consumption of positive electrode is that (wherein, the consumption of the LiFePO4 is 97g, institute to 100g
The consumption of Kynoar is stated for 1.5g, the consumption of the carbon black is 1.5g)；The consumption of negative material is that 100g is (wherein, described
The consumption of graphite is 96g, and the consumption of the butadiene-styrene rubber is 2g, and the consumption of the electrically conductive graphite is 1g, the carboxymethyl cellulose
The consumption of plain sodium is 1g).
Wherein, electrolyte is 1L, including concentration is the lithium hexafluoro phosphate of 1.05mol/L；The ethylene carbonate of 30 weight %,
The methyl ethyl carbonate of the diethyl carbonate of 30 weight %, 30 weight %；The lithium carbonate of 2 weight % sodium chloride and 2 weight %.
The preparation of above-mentioned lithium ion battery is prepared using prior art.
Comparative example 1
A kind of lithium ion battery, the battery includes positive electrode, negative material, cellulosic separator and electrolyte, the battery
Positive electrode include LiFePO4, Kynoar and carbon black, the negative pole of the battery includes graphite, butadiene-styrene rubber, conductive stone
Ink and sodium carboxymethylcellulose；Wherein, the consumption of positive electrode is that (wherein, the consumption of the LiFePO4 is 97g, institute to 100g
The consumption of Kynoar is stated for 1.5g, the consumption of the carbon black is 1.5g)；The consumption of negative material is that 100g is (wherein, described
The consumption of graphite is 96g, and the consumption of the butadiene-styrene rubber is 2g, and the consumption of the electrically conductive graphite is 1g, the carboxymethyl cellulose
The consumption of plain sodium is 1g).
(its formula is for lithium-ion battery electrolytes that above-mentioned electrolyte is commonly used for those skilled in the art：Electrolysis relative to 1L
Liquid, the concentration of lithium hexafluoro phosphate is 0.8mol/L, 10 weight % propene carbonates, 15% ethylene carbonate and 25% carbonic acid diethyl
Ester)
The preparation of above-mentioned lithium ion battery is prepared using prior art.
Test case
Lithium ion battery obtained in embodiment 1 is carried out into performance test, its 8C rate charge-discharge under 25 DEG C of environment is tested
Performance, and its cycle performance in 1C multiplying power charging 5C multiplying power dischargings；It is tested at -20 DEG C, 5C multiplying power discharging properties,
Testing result is shown in Fig. 1-Fig. 3, be can be seen that by Fig. 1-Fig. 3：In the environment of 25 DEG C, 8C multiplying powers current charge-discharge electricity, discharge capacity
Up to more than the 95% of rated capacity, and 1C charging 5C discharge cycles 2000 times, capability retention is more than 90%；At -20 DEG C,
With 5C multiplying power current discharges, discharge capacity reaches more than the 80% of rated capacity.
Lithium ion battery obtained in comparative example 1 is carried out into performance test, its 8C rate charge-discharge under 25 DEG C of environment is tested
Performance, and its cycle performance in 1C multiplying power charging 5C multiplying power dischargings；It is tested at -20 DEG C, 5C multiplying power discharging properties.
According to the above-mentioned technical solution, the electrolyte that the present invention is provided has excellent discharge and recharge for lithium ion battery
Performance, and discharge performance is good at low ambient temperatures, lithium ion battery obtained in embodiment 1 by detection show the lithium from
The specific performance of sub- battery is as follows：In the environment of 25 DEG C, 8C multiplying powers current charge-discharge electricity, discharge capacity reaches the 95% of rated capacity
More than, and 1C charging 5C discharge cycles 2000 times, capability retention is more than 90%；At -20 DEG C, put with 5C multiplying power electric currents
Electricity, discharge capacity reaches more than the 80% of rated capacity.
Lithium ion battery obtained in comparative example 1 shows that the specific performance of the lithium ion battery is as follows by detection：At 25 DEG C
In the environment of, 8C multiplying powers current charge-discharge electricity, discharge capacity reaches rated capacity less than 60%, and 1C charging 5C discharge cycles can only reach
To 1200 times；At -20 DEG C, with 5C multiplying power current discharges, discharge capacity is up to rated capacity less than 45%.
To sum up, lithium ion battery obtained in embodiment 1 possesses more excellent filling compared with lithium ion battery obtained in comparative example 1
Discharge performance, and discharge effect is more excellent at low ambient temperatures.
The preferred embodiment of the present invention described in detail above, but, the present invention is not limited in above-mentioned implementation method
Detail, in range of the technology design of the invention, various simple variants can be carried out to technical scheme, this
A little simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy is no longer separately illustrated.
Additionally, can also be combined between a variety of implementation methods of the invention, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (10)
1. a kind of electrolyte, it is characterised in that the electrolyte contains：Main salt, organic ester, organic additive and metal unit of IA races
Plain halogen and/or lithium carbonate.
2. electrolyte according to claim 1,
Wherein, relative to 1L electrolyte, the content of main salt is 1-1.15mol/L；
On the basis of the gross weight of electrolyte, the content of organic ester is 60-90 weight %, the content of organic additive is 0.5-
The content of 2.5 weight %, IA race's metallic element halogens and/or lithium carbonate is 0.5-5 weight %.
3. electrolyte according to claim 1 and 2, wherein, organic ester is ethylene carbonate, diethyl carbonate, carbonic acid first
One or more of ethyl ester, propene carbonate and dimethyl carbonate；And/or
Organic additive is in vinylene carbonate, fluorinated ethylene carbonate, sulfurous ethene acid esters and vinylethylene carbonate
One or more；And/or
IA races metallic element halogen is sodium chloride and/or potassium chloride.
4. electrolyte according to claim 1 and 2, wherein, the main salt is lithium hexafluoro phosphate；With the gross weight of electrolyte
On the basis of, the organic ester includes ethylene carbonate, the diethyl carbonate of 25-35 weight % and the 25-35 weights of 25-35 weight %
Measure the methyl ethyl carbonate of %；The IA races metallic element halogen is sodium chloride.
5. application of the electrolyte in claim 1-4 described in any one in battery material.
6. a kind of lithium ion battery, the lithium ion battery includes positive electrode, negative material, barrier film and electrolyte；Its feature
It is, electrolyte of the electrolyte described in any one in claim 1-4.
7. lithium ion battery according to claim 6, wherein, the positive electrode includes modified phosphate iron lithium, described to change
The preparation method of property LiFePO4 includes：
LiFePO4, nitrogenous Graphene and organic solvent are mixed, the first heat treatment is carried out after drying.
8. lithium ion battery according to claim 7, wherein, the preparation process of nitrogenous Graphene includes：By graphite oxide
Alkene and urea are mixed, are optionally dried, and then carry out the second heat treatment, obtain nitrogenous Graphene.
9. lithium ion battery according to claim 8, wherein, the condition of the first heat treatment and the second heat treatment is each wrapped
Include：Temperature is 500-900 DEG C, and the time is 1-2.5h；And/or
Graphene oxide is in molar ratio 1 with urea：The ratio of 1-1.5 is mixed, and nitrogenous Graphene presses matter with LiFePO4
Amount is than being 1：5-20 is mixed.
10. lithium ion battery according to claim 9, wherein, the positive electrode includes：Modified phosphate iron lithium, bonding
Agent and conductive agent；Relative to the positive electrode of 100 weight portions, the content of the modified phosphate iron lithium is 92-97 weight portions, described
The content of binding agent is 1.5-4 weight portions, and the content of the conductive agent is 1.5-4 weight portions；
It is preferred that bonding agent is Kynoar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710022234.XA CN106784995A (en) | 2017-01-12 | 2017-01-12 | Electrolyte and its application and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710022234.XA CN106784995A (en) | 2017-01-12 | 2017-01-12 | Electrolyte and its application and lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106784995A true CN106784995A (en) | 2017-05-31 |
Family
ID=58947406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710022234.XA Pending CN106784995A (en) | 2017-01-12 | 2017-01-12 | Electrolyte and its application and lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106784995A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107887644A (en) * | 2017-11-09 | 2018-04-06 | 安徽智森电子科技有限公司 | A kind of electrolyte of lithium battery |
| CN110828895A (en) * | 2019-11-12 | 2020-02-21 | 湖南艾威尔新能源科技有限公司 | Low-temperature-resistant lithium ion battery electrolyte and lithium ion battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104979563A (en) * | 2015-07-19 | 2015-10-14 | 厦门凯纳石墨烯技术有限公司 | Preparation method of azotized graphene lithium ion power battery slurry |
| CN106025361A (en) * | 2016-05-27 | 2016-10-12 | 山东精工电子科技有限公司 | Low-temperature lithium ion battery |
| CN106252635A (en) * | 2016-09-30 | 2016-12-21 | 合肥国轩高科动力能源有限公司 | The lithium iron phosphate positive material of a kind of graphene coated and preparation method |
-
2017
- 2017-01-12 CN CN201710022234.XA patent/CN106784995A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104979563A (en) * | 2015-07-19 | 2015-10-14 | 厦门凯纳石墨烯技术有限公司 | Preparation method of azotized graphene lithium ion power battery slurry |
| CN106025361A (en) * | 2016-05-27 | 2016-10-12 | 山东精工电子科技有限公司 | Low-temperature lithium ion battery |
| CN106252635A (en) * | 2016-09-30 | 2016-12-21 | 合肥国轩高科动力能源有限公司 | The lithium iron phosphate positive material of a kind of graphene coated and preparation method |
Non-Patent Citations (1)
| Title |
|---|
| 任永欢: "锂离子电池低温-高电压电解液研究", 《中国博士论文全文数据库•工程科Ⅱ辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107887644A (en) * | 2017-11-09 | 2018-04-06 | 安徽智森电子科技有限公司 | A kind of electrolyte of lithium battery |
| CN110828895A (en) * | 2019-11-12 | 2020-02-21 | 湖南艾威尔新能源科技有限公司 | Low-temperature-resistant lithium ion battery electrolyte and lithium ion battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Lee et al. | SEI layer-forming additives for LiNi0. 5Mn1. 5O4/graphite 5 V Li-ion batteries | |
| Zhang et al. | LiPF6 and lithium oxalyldifluoroborate blend salts electrolyte for LiFePO4/artificial graphite lithium-ion cells | |
| Fang et al. | Electrospun montmorillonite modified poly (vinylidene fluoride) nanocomposite separators for lithium-ion batteries | |
| Li et al. | Lithium oxalyldifluoroborate/carbonate electrolytes for LiFePO4/artificial graphite lithium-ion cells | |
| CN102709589B (en) | Lithium ion battery and electrolyte thereof | |
| CN107482222A (en) | Combined conductive agent, electrodes of lithium-ion batteries and lithium ion battery | |
| Liao et al. | Effects of fluoroethylene carbonate on low temperature performance of mesocarbon microbeads anode | |
| CN106856236B (en) | Secondary battery cathode material, preparation method thereof and battery | |
| CN104995785A (en) | Electrolyte solution and lithium ion secondary battery provided with same | |
| CN107017433B (en) | Nonaqueous electrolytic solution and lithium ion battery | |
| CN102332579B (en) | Lithium ion battery and cathode active material thereof | |
| Liao et al. | Enhancement of low-temperature performance of LiFePO4 electrode by butyl sultone as electrolyte additive | |
| CN106602129B (en) | A kind of polyion battery and preparation method thereof | |
| CN106025356A (en) | Electrolyte and lithium-ion battery comprising same | |
| CN103000939A (en) | Lithium ion battery with graphene composite membrane as current collector and preparation method thereof | |
| CN108232292A (en) | A kind of electrolyte for lithium ion battery | |
| JP2016504739A (en) | Negative electrode for lithium secondary battery, method for producing the same, and lithium secondary battery including the same | |
| CN103515650A (en) | Non-aqueous electrolyte for lithium ion battery, and application thereof | |
| CN108232129A (en) | Lithium ion battery negative material, negative plate and lithium ion battery | |
| CN109309246A (en) | Electrolyte and electrochemical energy storage device | |
| CN108493419A (en) | A kind of temperature sensitivity combination electrode and preparation method thereof | |
| Qin et al. | Electrolyte additive to improve performance of MCMB/LiNi1/3Co1/3Mn1/3O2 Li-ion cell | |
| CN107204421A (en) | Negative plate and lithium ion battery | |
| CN105870496A (en) | Podiform silicon @ amorphous carbon @ graphene nanoscroll composite material for lithium ion battery negative material | |
| CN106340670B (en) | Non-aqueous electrolyte and lithium ion battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170531 |