CN107706463B - A kind of the nitroso grafting carbonic ester electrolyte and preparation method of lithium battery - Google Patents
A kind of the nitroso grafting carbonic ester electrolyte and preparation method of lithium battery Download PDFInfo
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- H—ELECTRICITY
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- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
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Abstract
The invention discloses a kind of nitroso of lithium battery grafting carbonic ester electrolyte and preparation methods, by nitrite to ethylene carbonate and propene carbonate mixed processing, while a small amount of fluoro ethers, borate are added as auxiliary agent, low temperature（40-50℃）Heating water bath simultaneously quickly stirs, while adjusting PH to alkalescent, makes NO after nitrite ion decomposition2 ‑With the alkane alkenyl and Carbonyl addition of ethylene carbonate and propene carbonate, the antioxygenic property of carbonic ester is improved by fluoro ethers and nitroso collective effect, small molecule group grafting simultaneously can reduce solution overall viscosity, part nitrogen-atoms is entered carbochain in a manner of displacement and causes fault of construction, reduces the combination energy of nitroso group.
Description
Technical field
The present invention relates to field of lithium, and in particular to lithium battery electrolytes, more particularly to a kind of nitrous of lithium battery
Base is grafted carbonic ester electrolyte and preparation method.
Background technology
Lithium battery electrolytes are the carriers of battery intermediate ion transmission.Generally it is made of lithium salts and organic solvent.Electrolyte exists
Play the role of conducting ion between lithium battery positive and negative anodes, is the guarantee for the advantages that lithium ion battery obtains high voltage, high specific energy.
Electrolyte under certain condition, presses one generally by raw materials such as the organic solvent of high-purity, electrolyte lithium salt, necessary additives
What certainty ratio was formulated.The main component of lithium battery point solution liquid generally comprises following seven kinds：1. ethylene carbonate, propylene carbonate
Ester, diethyl carbonate, dimethyl carbonate (dimethyl carbonate, DMC), methyl ethyl carbonate, lithium hexafluoro phosphate, five fluorine
Change phosphorus；Wherein ethylene carbonate, molecular formula:C3H4O3, clear colorless liquid (>35 DEG C), it is polyacrylonitrile, polyvinyl chloride
Good solvent.It can be used as the liquid that reels off raw silk from cocoons in weaving；It also can be directly as the solvent of removing sour gas and the additive of concrete；
It can be used as the component and raw material of pharmacy in medicine；Also act as the stabilizer of plastics blowing agent and synthetic lubricant fluid；In battery
Industrially, it can be used as the fine solvent of lithium battery electrolytes.Propene carbonate molecular formula:C4H6O3, colourless odorlessness or light
Yellow transparent liquid is dissolved in water and carbon tetrachloride, and with ether, acetone, benzene etc. is miscible.It is a kind of excellent polar solvent.This production
Product are mainly used for high score subjob, gas separating technology and electrochemistry.It is former to be especially used for absorbing natural gas, petrochemical plant synthesis ammonia
Expect carbon dioxide therein, also acts as plasticizer, spin solvent, alkene and aromatic hydrocarbons extraction agent etc..
For now, lithium battery master electrolyte to be used has lithium perchlorate, lithium hexafluoro phosphate etc..But use lithium perchlorate
Manufactured battery cryogenic effect is bad, has the danger of explosion, Japan and the U.S. to be forbidden to use.And it is electric made of fluorine-containing lithium salts
Pond performance is good, no explosion danger, strong applicability, especially uses battery made of lithium hexafluoro phosphate, in addition to the above-described advantages, useless in the future
The processing work of rechargeable batteries is relatively easy, and to eco-friendly, therefore the electrolytelike market prospects are very extensive.In lithium
While ion battery application is more extensive, the attention rate of safety, cycle performance and cryogenic property on 3C batteries is more very
In its energy density and capacity.Current lithium battery electrolytes solvent is mainly carbonic ether, carboxylic acid esters, and cyclic carbonates are situated between
Electric constant is high, but viscosity is higher simultaneously, and linear carbonates class viscosity is relatively low, and dielectric constant is relatively low.Current carbonates are molten
Agent cannot meet demand of both dielectric constant and viscosity separately as electrolyte solvent, and for inoxidizability and safety
Property is poor, therefore is of great practical significance for the study on the modification of electrolyte.
Application No. is CN201210481362.8 to disclose a kind of electrolyte for Li-S batteries, mainly by electrolyte
Salt and organic solvent composition, electrolytic salt include polysulfide lithium, and the molecular formula of the polysulfide lithium is Li2Sn.The preparation side of the electrolyte
Method is：Lithium metal or Li2S are added in organic solvent in molar ratio with elemental sulfur, under room temperature and inert atmosphere protection into
Row reaction can be obtained electrolyte, alternative addition lithium salts, shuttle inhibitor etc. in the electrolyte；It also discloses comprising aforementioned
The Li-S batteries of electrolyte, negative electrode active material are lithium metal or lithium alloys；Its positive electrode active materials is sulphur simple substance, organic
At least one of sulfide, carbon-sulfur polymer, and positive electrode active materials, conductive agent and adhesive are by certain mass proportioning composition
Anode；It is about 0.04mL that wherein every milligram of sulphur, which corresponds to the dosage of electrolyte,；Above-mentioned organic solvent be ethyl alcohol, acetonitrile, hexamethylene,
Cyclohexanone, isopropanol, tetrahydrofuran, 2- methyltetrahydrofurans, ethylene carbonate, propene carbonate, butylene, carbonic acid two
Methyl esters, diethyl carbonate, methyl ethyl carbonate, methyl propyl carbonate, methyl formate, Ethyl formate, methyl acetate, ethyl acetate, second
It is propyl propionate, methyl propionate, ethyl propionate, ethyl butyrate, dimethoxy-ethane, 1,3- dioxolanes, glycol dimethyl ether, two sweet
At least one of diethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, diethylene glycol dimethyl ether, sulfolane, two methylene sulfones, dimethyl sulfone；It should
Although patent is proposed is carried out using a variety of organic solvents as electrolyte, and but still unresolved electrolyte solvent is for dielectric constant
With viscosity both sides demand.
Invention content
For disadvantages described above, the object of the present invention is to provide a kind of nitroso of lithium battery grafting carbonic ester electrolyte and systems
Preparation Method, NO after making nitrite ion decompose2 -With EC/PC additions, carbon is improved by fluoro ethers and nitroso collective effect
The antioxygenic property of acid esters, while the grafting of small molecule group can reduce solution overall viscosity, it is organic molten to solve electrolyte
In terms of agent dielectric constant and viscosity there are the problem of.
In order to solve the above technical problems,
A kind of preparation method of the nitroso grafting carbonic ester electrolyte of lithium battery, it is characterised in that include the following steps：
S01：By nitrous acid lithium salts to organic solvent ethylene carbonate and propene carbonate mixed processing, while being added and helping
Agent；
S02：It heating water bath and is quickly stirred under 40 DEG C~50 DEG C of cryogenic conditions；
S03：PH value is adjusted during heating water bath to alkalescent, makes the NO in nitrous acid lithium salts2 -With ethylene carbonate
The Carbonyl addition of ester and propene carbonate；
S04：Kept for 10~30 minutes reaction time completed the preparation of electrolyte.
As being further improved for this programme, the pH value is 7.5~8.5.
As being further improved for this programme, the organic solvent is that the mixing of ethylene carbonate and propene carbonate is molten
Agent, the NO2 -The ratio of the sum of ion and ethylene carbonate and propene carbonate molal quantity is 1：2, measure the viscosity of electrolyte
Data are indicated with D2 and are recorded in table 1.
As being further improved for this programme, the mixing molar ratio of the ethylene carbonate and propene carbonate is 1：
（0.5~1）, the mixing molar ratio of preferred ethylene carbonate and propene carbonate is 1：0.5, the NO2 -Ion and carbonic acid
The ratio of the sum of vinyl acetate and propene carbonate molal quantity is 1：1, the viscosity data for measuring electrolyte is indicated and is recorded in D3
In table 1.Chemical property based on ethylene carbonate and propene carbonate, ethylene carbonate have higher compared to propene carbonate
Stability, while to be a kind of polar solvent can provide NO for ethylene carbonate and propene carbonate2 -Carbonyl needed for grafting, carbon
Difference lies in ethylene carbonates as electrolyte has higher performance for vinyl acetate and propene carbonate, therefore in the present invention
The ratio of middle ethylene carbonate in the electrolytic solution is more than propene carbonate.
As being further improved for this programme, the auxiliary agent is fluoro ethers, the molar ratio of the auxiliary agent and organic solvent
It is（0.1~0.5）：1, it is 0.2 that the molar ratio of auxiliary agent and organic solvent is selected in preferred this programme:1, measure the viscous of electrolyte
Degrees of data is indicated with D4 and is recorded in table 1.In order to enhance the antioxygenic property of electrolyte, by be added auxiliary agent fluoro ethers and
Nitroso collective effect improves the antioxygenic property of ethylene carbonate and propene carbonate, and part nitrogen-atoms is entered in a manner of displacement
Carbochain causes fault of construction, reduces the combination energy of nitroso group.
As being further improved for this programme, the auxiliary agent is fluoro ethers and borate by 1：0.3 mixing, it is described to help
The molar ratio of agent and organic solvent is（0.1~0.5）：1, fluoro ethers in preferred this programme, borate and organic solvent
Molar ratio is 0.2:0.06:1, the viscosity data for measuring electrolyte is indicated with D5 and is recorded in table 1.Borate has stronger
Alkalinity is added a small amount of borate for adjusting electrolyte to alkalescent, is catalyzed NO in the electrolytic solution2 -With ethylene carbonate and carbon
Acid propylene ester addition, to reduce the combination energy of nitroso group, for prevent electrolyte alkalinity it is too strong, preferred auxiliary agent with have
The molar ratio of solvent is 0.1：1, the molar ratio for being in other words exactly borate and solvent is about equal to 0.025:1.
Table 1, viscosity measurement data：
| Data number | D1 | D2 | D3 | D4 | D5 |
| Viscosity（Unit CP） | 1.32 | 1.59 | 1.12 | 0.83 | 0.67 |
The present invention is by nitrite to ethylene carbonate（EC）And propene carbonate（PC）Mixed processing, while being added few
Fluoro ethers, borate are measured as auxiliary agent, the NO in nitrous acid lithium salts2 -It is total by fluoro ethers and nitroso with EC/PC additions
Same-action improves the antioxygenic property of carbonic ester, while the grafting of small molecule group can reduce solution overall viscosity, and part nitrogen is former
Son is entered carbochain in a manner of displacement and causes fault of construction, reduces the combination energy of nitroso group.
A kind of nitroso for the lithium battery being prepared by the above method is grafted carbonic ester electrolyte.
By the optimization to above-mentioned different schemes, and Binding experiment data can obtain, NO is catalyzed in electrolyte2 -Number and carbonyl
In the case that the sum of radix mesh is equal, the viscosity of electrolyte is optimal, once carbonyl number is more than NO2 -Number, the viscosity of electrolyte
It is increased slightly；Ethylene carbonate and the single ethylene carbonate or carbonic acid third of the mixed organic solvent ratio of propene carbonate simultaneously
In the case that enester is as organic solvent, the viscosity of electrolyte is lower；And in the electrolytic solution be added fluoro ethers adjust pH value to
After alkalescent, the viscosity of electrolyte is greatly lowered, therefore can be concluded that fluoro ethers effectively reduces
The viscosity of electrolysis, while borate, which is added, so that effect is further strengthened.
Compared with prior art, the nitroso grafting carbonic ester electrolyte and preparation method of a kind of lithium battery of the invention
Advantageous effect is：The present invention is by nitrite to ethylene carbonate（EC）And propene carbonate（PC）Mixed processing adds simultaneously
Enter a small amount of fluoro ethers, borate as auxiliary agent, low temperature（40-50℃）Heating water bath simultaneously quickly stirs, while adjusting pH to weak
Alkalinity makes nitrous acid NO2 -With EC/PC additions, the inoxidizability of carbonic ester is improved by fluoro ethers and nitroso collective effect
Can, while the grafting of small molecule group can reduce solution overall viscosity, part nitrogen-atoms is entered carbochain in a manner of displacement and causes to tie
Structure defect reduces the combination energy of nitroso group.
Specific implementation mode
In the following, the present invention will be further described in detail by way of specific embodiments, but this should not be interpreted as to the present invention
Range be only limitted to example below.Without departing from the idea of the above method of the present invention, according to ordinary skill
The various replacements or change that knowledge and customary means are made, should be included in the scope of the present invention.
Embodiment 1
A kind of the nitroso grafting carbonic ester electrolyte and preparation method of lithium battery, by nitrous acid lithium salts to ethylene carbonate
With propene carbonate mixed processing, the wherein mixed proportion of ethylene carbonate and propene carbonate is 1:0.5, while fluoro is added
As auxiliary agent, the ratio of fluoro ethers and borate is 1 for ethers, borate:0.3, electrolyte is formed, is formed in the mixed solution
Electrolyte in lithium nitrite salt molar fraction be 0.435 i.e. NO2 -Molar fraction be 0.435, mole of ethylene carbonate
Score is 0.29, and the molar fraction of propene carbonate is 0.145；The molar fraction of fluoro ethers be 0.1, borate mole point
Number is 0.03；It heating water bath and is quickly stirred under 40 DEG C of cryogenic conditions；During heating water bath adjust pH value to
7.5, make the NO in nitrous acid lithium salts2 -With ethylene carbonate and propene carbonate addition；Kept for 15 minutes reaction time completed electricity
Solve the preparation of liquid；Electrolyte anti oxidation time T1 and electrolysis fluid viscosity D1 are measured, and is recorded in table 2.
Embodiment 2
A kind of the nitroso grafting carbonic ester electrolyte and preparation method of lithium battery, by nitrous acid lithium salts to ethylene carbonate
With propene carbonate mixed processing, the wherein mixed proportion of ethylene carbonate and propene carbonate is 1:1, while fluoro-ether is added
As auxiliary agent, the ratio of fluoro ethers and borate is 1 for class, borate:0.3, electrolyte is formed, is formed in the mixed solution
The molar fraction of lithium nitrite salt is 0.493 i.e. NO in electrolyte2 -Molar fraction be 0.493, ethylene carbonate mole point
Number is 0.125, and the molar fraction of propene carbonate is 0.125；The molar fraction of fluoro ethers be 0.2, borate mole point
Number is 0.06；It heating water bath and is quickly stirred under 45 DEG C of cryogenic conditions；During heating water bath adjust pH value to
8.1, make nitrite anions NO2 -With ethylene carbonate and propene carbonate addition；Kept for 30 minutes reaction time completed electrolyte
It prepares；Electrolyte anti oxidation time T2 and electrolysis fluid viscosity D2 are measured, and is recorded in table 2.
Embodiment 3
A kind of the nitroso grafting carbonic ester electrolyte and preparation method of lithium battery, by nitrous acid lithium salts to ethylene carbonate
Mixed processing, while fluoro ethers, borate is added as auxiliary agent, the ratio of fluoro ethers and borate is 1:0.3, form electricity
Liquid is solved, the molar fraction of lithium nitrite salt is 0.435 i.e. NO in the electrolyte that the mixed solution is formed2 -Molar fraction be
0.435, the molar fraction of ethylene carbonate is 0.435；The molar fraction of fluoro ethers is 0.1, the molar fraction of borate is
0.03；It heating water bath and is quickly stirred under 40 DEG C of cryogenic conditions；PH value is adjusted during heating water bath to 7.5, is made
Nitrite anions NO2 -With ethylene carbonate and propene carbonate addition；Kept for 30 minutes reaction time completed the preparation of electrolyte；It surveys
Electrolyte anti oxidation time T3 and electrolysis fluid viscosity D3 are measured, and is recorded in table 2.
Embodiment 4
A kind of the nitroso grafting carbonic ester electrolyte and preparation method of lithium battery, by nitrous acid lithium salts to propene carbonate
Mixed processing, while fluoro ethers, borate is added as auxiliary agent, the ratio of fluoro ethers and borate is 1:0.3, form electricity
Liquid is solved, the molar fraction of lithium nitrite salt is 0.435 i.e. NO in the electrolyte that the mixed solution is formed2 -Molar fraction be
0.435, the molar fraction of propene carbonate is 0.435；The molar fraction of fluoro ethers is 0.1, the molar fraction of borate is
0.03；It heating water bath and is quickly stirred under 40 DEG C of cryogenic conditions；PH value is adjusted during heating water bath to 7.5, is made
Nitrite anions NO2 -With ethylene carbonate and propene carbonate addition；Kept for 25 minutes reaction time completed the preparation of electrolyte；It surveys
Electrolyte anti oxidation time T4 and electrolysis fluid viscosity D4 are measured, and is recorded in table 2.
Embodiment 5
A kind of the nitroso grafting carbonic ester electrolyte and preparation method of lithium battery, by nitrous acid lithium salts to ethylene carbonate
With propene carbonate mixed processing, the wherein mixed proportion of ethylene carbonate and propene carbonate is 1:1, while fluoro-ether is added
As auxiliary agent, the ratio of fluoro ethers and borate is 1 for class, borate:0.3, electrolyte is formed, is formed in the mixed solution
The molar fraction of lithium nitrite salt is 0.41 i.e. NO in electrolyte2 -Molar fraction be the 0.41, molar fraction of ethylene carbonate
It is 0.101, the molar fraction of propene carbonate is 0.101；The molar fraction of fluoro ethers is the molar fraction of 0.3, borate
It is 0.09；It heating water bath and is quickly stirred under 40 DEG C of cryogenic conditions；PH value is adjusted during heating water bath to 8.3,
Make nitrite anions NO2 -With ethylene carbonate and propene carbonate addition；Kept for 15 minutes reaction time completed the preparation of electrolyte；
Electrolyte anti oxidation time T5 and electrolysis fluid viscosity D5 are measured, and is recorded in table 2.
Embodiment 6
A kind of the nitroso grafting carbonic ester electrolyte and preparation method of lithium battery, by nitrous acid lithium salts to ethylene carbonate
With propene carbonate mixed processing, the wherein mixed proportion of ethylene carbonate and propene carbonate is 1:0.5, while fluoro is added
As auxiliary agent, the ratio of fluoro ethers and borate is 1 for ethers, borate:0.3, electrolyte is formed, is formed in the mixed solution
Electrolyte in lithium nitrite salt molar fraction be 0.435 i.e. NO2 -Molar fraction be 0.435, mole of ethylene carbonate
Score is 0.29, and the molar fraction of propene carbonate is 0.145；The molar fraction of fluoro ethers is mole of 0.15, borate
Score is 0.45；It heating water bath and is quickly stirred under 40 DEG C of cryogenic conditions；During heating water bath adjust pH value to
7.9, make nitrite anions NO2 -With ethylene carbonate and propene carbonate addition；Kept for 15 minutes reaction time completed electrolyte
It prepares；Electrolyte anti oxidation time T6 and electrolysis fluid viscosity D6 are measured, and is recorded in table 2.
Comparative example 1
A kind of lithium battery electrolytes, by nitrous acid lithium salts to ethylene carbonate and propene carbonate mixed processing, wherein carbon
The mixed proportion of vinyl acetate and propene carbonate is 1:0.5 forms electrolyte, in the electrolyte Central Asia that the mixed solution is formed
The molar fraction of nitric acid lithium salts is 0.5 i.e. NO2 -Molar fraction be 0.4, the molar fraction of ethylene carbonate is 0.333, carbonic acid
The molar fraction of acrylic ester is 0.167；Electrolyte anti oxidation time T1-1 and electrolysis fluid viscosity D1-1 are measured, and is recorded in table 2
In.
Comparative example 2
A kind of lithium battery electrolytes, by nitrous acid lithium salts to ethylene carbonate and propene carbonate mixed processing, wherein carbon
The mixed proportion of vinyl acetate and propene carbonate is 1:1, while fluoro ethers is added, electrolyte is formed, in the mixed solution
The molar fraction of lithium nitrite salt is 0.533 i.e. NO in the electrolyte of formation2 -Molar fraction be 0.533, ethylene carbonate
Molar fraction is 0.133, and the molar fraction of propene carbonate is 0.133；The molar fraction of fluoro ethers is 0.2, at 45 DEG C
It heating water bath and is quickly stirred under cryogenic conditions；Electrolyte anti oxidation time T2-1 and electrolysis fluid viscosity D2-1 are measured, and is recorded
In table 2.
Comparative example 3
A kind of lithium battery electrolytes, by nitrous acid lithium salts to ethylene carbonate mixed processing, borate is formed as auxiliary agent
Electrolyte, the molar fraction of lithium nitrite salt is 0.435 i.e. NO in the electrolyte that the mixed solution is formed2 -Molar fraction be
0.435, the molar fraction of ethylene carbonate is 0.485；The molar fraction of borate is 0.03；The water under 40 DEG C of cryogenic conditions
Bath is heated and is quickly stirred；9 keep the preparation of 30 minutes reaction time completion electrolyte；Measure electrolyte anti oxidation time T3-1
With electrolysis fluid viscosity D3-1, and it is recorded in table 2.
Comparative example 4
A kind of lithium battery electrolytes, a kind of the nitroso grafting carbonic ester electrolyte and preparation method of lithium battery, by nitrous
Sour lithium salts forms electrolyte to propene carbonate mixed processing, the lithium nitrite salt in the electrolyte that the mixed solution is formed
Molar fraction is 0.5 i.e. NO2 -Molar fraction be 0.5, the molar fraction of propene carbonate is 0.5；In 40 DEG C of cryogenic conditions
Lower heating water bath simultaneously quickly stirs；Kept for 25 minutes reaction time completed the preparation of electrolyte；Measure electrolyte anti oxidation time
T4-1 and electrolysis fluid viscosity D4-1, and be recorded in table 2.
Comparative example 5
A kind of lithium battery electrolytes, by nitrous acid lithium salts to ethylene carbonate and propene carbonate mixed processing, wherein carbon
The mixed proportion of vinyl acetate and propene carbonate is 1:1, while fluoro ethers is added, electrolyte is formed, in the mixed solution
The molar fraction of lithium nitrite salt is 0.6 i.e. NO in the electrolyte of formation2 -Molar fraction be 0.6, mole of ethylene carbonate
Score is 0.15, and the molar fraction of propene carbonate is 0.15；The molar fraction of fluoro ethers is to divide in 0.1 holding reaction time 15
Clock completes the preparation of electrolyte；Electrolyte anti oxidation time T5-1 and electrolysis fluid viscosity D5-1 are measured, and is recorded in table 2.
Comparative example 6
A kind of lithium battery electrolytes, by nitrous acid lithium salts to ethylene carbonate and propene carbonate mixed processing, wherein carbon
The mixed proportion of vinyl acetate and propene carbonate is 1:1, while fluoro ethers, borate is added as auxiliary agent, fluoro ethers
Ratio with borate is 1:0.3, formed electrolyte, the mixed solution formed electrolyte in lithium nitrite salt mole point
Number is 0.4 i.e. NO2 -Molar fraction be 0.4, the molar fraction of ethylene carbonate is 0.05, the molar fraction of propene carbonate is
0.05；The molar fraction of fluoro ethers is 0.4, the molar fraction of borate is 0.1；The heating water bath under 40 DEG C of cryogenic conditions
And it quickly stirs；PH value is adjusted during heating water bath to 9.6, makes nitrite anions NO2 -With ethylene carbonate and carbonic acid third
Enester addition；Kept for 15 minutes reaction time completed the preparation of electrolyte；Measure electrolyte anti oxidation time T6-1 and electrolyte
Viscosity D6-1, and be recorded in table 2.
2 embodiment of table and comparative example electrolyte anti oxidation time and viscosity
| Serial number | Unit/CP | Unit/h | ||
| Embodiment 1 | D1 | 0.82 | T1 | 25 |
| Comparative example 1 | D1-1 | 2.6 | T1-1 | 9 |
| Embodiment 2 | D2 | 0.67 | T2 | 32 |
| Comparative example 2 | D2-1 | 2.2 | T2-1 | 8 |
| Embodiment 3 | D3 | 1.03 | T3 | 21 |
| Comparative example 3 | D3-1 | 3.7 | T3-1 | 6 |
| Embodiment 4 | D4 | 1.12 | T4 | 18 |
| Comparative example 4 | D4-1 | 3.6 | T4-1 | 5 |
| Embodiment 5 | D5 | 0.73 | T5 | 22 |
| Comparative example 5 | D5-1 | 2.5 | T5-1 | 7 |
| Embodiment 6 | D6 | 0.62 | T6 | 33 |
| Comparative example 6 | D6-1 | 1.9 | T6-1 | 13 |
By the optimization to above-mentioned different schemes, and Binding experiment data can obtain, influence electrolyte antioxygenic property
It is to be catalyzed NO in electrolyte with the leading indicator of viscosity2 -The ratio of carbonyl number and the acid-base property of electrolyte, once carbonyl number
Mesh is more than NO2 -The viscosity of number, electrolyte is increased slightly；And in the case of alkalescent electrolyte antioxygenic property higher than acid or
Strong alkaline electrolytes.
Claims (4)
1. a kind of preparation method of the nitroso grafting carbonic ester electrolyte of lithium battery, it is characterised in that include the following steps：
S01：By nitrous acid lithium salts to organic solvent ethylene carbonate and propene carbonate mixed processing, while auxiliary agent is added；
S02：It heating water bath and is quickly stirred under 40 DEG C~50 DEG C of cryogenic conditions；
S03：PH value is adjusted during heating water bath to alkalescent, makes the NO in nitrous acid lithium salts2 -With ethylene carbonate and
The Carbonyl addition of propene carbonate；
S04：Kept for 10~30 minutes reaction time completed the preparation of electrolyte；
The auxiliary agent is fluoro ethers and borate in molar ratio 1：The mixture of 0.3 mixing, the auxiliary agent and organic solvent
Molar ratio is（0.1~0.5）：1.
2. a kind of preparation method of the nitroso grafting carbonic ester electrolyte of lithium battery, feature exist according to claim 1
In：The pH value is 7.5~8.5.
3. a kind of preparation method of the nitroso grafting carbonic ester electrolyte of lithium battery, feature exist according to claim 1
In：The mixing molar ratio of the ethylene carbonate and propene carbonate is 1：（0.5~1）.
4. a kind of nitroso of lithium battery is grafted carbonic ester electrolyte, it is characterized in that by any one of claim 1-3 the methods
It is prepared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711177713.5A CN107706463B (en) | 2017-11-23 | 2017-11-23 | A kind of the nitroso grafting carbonic ester electrolyte and preparation method of lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711177713.5A CN107706463B (en) | 2017-11-23 | 2017-11-23 | A kind of the nitroso grafting carbonic ester electrolyte and preparation method of lithium battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107706463A CN107706463A (en) | 2018-02-16 |
| CN107706463B true CN107706463B (en) | 2018-11-06 |
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| US20040161671A1 (en) * | 2003-02-13 | 2004-08-19 | Medtronic, Inc. | Liquid electrolyte for an electrochemical cell |
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