CN1622383A - Preparing method of electrolyte for lithium thionyl chloride cell - Google Patents
Preparing method of electrolyte for lithium thionyl chloride cell Download PDFInfo
- Publication number
- CN1622383A CN1622383A CNA2004100613261A CN200410061326A CN1622383A CN 1622383 A CN1622383 A CN 1622383A CN A2004100613261 A CNA2004100613261 A CN A2004100613261A CN 200410061326 A CN200410061326 A CN 200410061326A CN 1622383 A CN1622383 A CN 1622383A
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- CN
- China
- Prior art keywords
- solution
- electrolyte
- lialcl
- lithium
- socl
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- 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.)
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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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The present invention is improved preparation process of electrolyte for lithium thionyl chloride. The SOCl2 solution is first rectified, then added with LiAlCl4 and metal lithium and heated and reflux purified for at least 12 hr, SO2 gas is injected into the solution, and in dry environment, the solution is filtered to prepare the electrolyte. The electrolyte has raised purity and can improve the voltage lag state of the lithium cell effectively.
Description
Technical field
The present invention relates to electrochemical field, more particularly, it relates to the improvement to lithium thionyl chloride cell (being called for short the inferior battery of lithium) preparation method of electrolyte.
Background technology
The inferior battery of lithium is the highest a kind of battery of specific energy in the present practical application battery in the world, and it adopts liquid cathode, electrolyte promptly of the present invention.It is exactly thereby that the product lithium chloride can stop cell reaction to be proceeded attached to the passivating film that forms one deck densification on the negative electrode that the inferior battery of lithium has a characteristic.Under general discharging current, this film can be easy to be punctured by electric current, but when battery is in little current discharge or stores, and the thickening that this film can not stop can cause the battery can't operate as normal when the big current work of needs, and this phenomenon is called voltage delay.The situation of improving the battery hysteresis has also become a problem of the inferior battery of research lithium.
Mostly the preparation method of the inferior battery electrolytic solution of existing lithium is LiAlCl
4(chlorine aluminium lithium salts) concentration in accordance with regulations is dissolved in SOCl
2Make solution in (thionyl chloride), adopt the reflux mode to dewater again, because this method is not to electrode material LiAlCl
4Handle, the content of beary metal that obtains in the final electrolyte is higher, causes the battery side reaction to increase, and battery power can not effectively be discharged, and the generation of aggravation battery hysteresis.Chinese patent application, publication number CN1508900A, in open day on June 30th, 2004, invention and created name is " lithium battery LiAlCl
4/ SOCl
2The preparation method of electrolyte ", this patent application has proposed in the close drying environment to LiAlCl
4/ SOCl
2The lithium metal that adds reacting dose in the solution, be stirred to solution and do not have the preparation method that gas produces, this method can effectively reduce the moisture in the solution, fails effectively to remove but its weak point is a beavy metal impurity in the solution, and the phenomenon that the inferior cell voltage of lithium lags behind fails to improve.
Summary of the invention
The present invention has overcome deficiency of the prior art, and the preparation method of the inferior battery electrolytic solution of a kind of lithium is provided, and it makes electrolyte impurity reduce the voltage delay performance improvement.
Technical scheme of the present invention is the preparation method of a kind of lithium thionyl chloride cell with electrolyte, may further comprise the steps successively:
A. with SOCl
2Carry out rectification and purification;
B. the SOCl after rectifying in the environment of humidity dew point value≤-25 ℃
2Solution adds LiAlCl
4, add lithium metal then;
C. solution being carried out reflux purified 12 hours at least;
D. in solution, inject SO
2Gas;
E. in the environment of humidity dew point value≤-35 ℃, filtering solution is made electrolyte.
SO to the solution injection
2Gas weight is the 5%-10% of solution weight.
To SOCl
2Solution adds LiAlCl
4Weight ratio be SOCl
2: LiAlCl
4=1000: 100-200.
LiAlCl
4By waiting anhydrous AlCl of mole
3Fusion forms with LiCl.
Press LiAlCl
4: lithium bar=10-20: the ratio of 1 (weight ratio) adds lithium metal
Compared with prior art, the invention has the beneficial effects as follows that the electrolyte raw material is through after the rectifying, backflow twice purification process, its harmful heavy metal (Pb
2+, Fe
3+, Fe
2+Deng) and inorganic matter impurity etc. reduce greatly, electrolyte purity is improved, side reaction reduces, efficient improves.And SO
2The injection of gas and an amount of LiAlCl
4Adding can effectively improve the hysteretic properties of battery, an amount of LiAlCl
4Adding, on the one hand make electrolyte charged from increase, can effectively control the content of insoluble matter LiCl on the other hand, and SO
2As one of product of cell reaction, must suppress the carrying out of cell reaction, slow down the formation speed of lithium chloride film, the voltage delay of the inferior battery of lithium is effectively improved.This method is simple, and equipment investment is few, and technology is easy to grasp, and is convenient to large-scale production.
Embodiment
The present invention is described in further detail below in conjunction with embodiment,
The concrete mode of concrete enforcement of the present invention is: at first thionyl chloride is carried out rectification and purification on 1 meter high rectifying column, in the dry environment of humidity dew point value≤-25 ℃, get 2000 gram thionyl chloride rectifying liquid branches in there-necked flask, add LiAlCl
4(by waiting anhydrous AlCl of mole
3Fusion forms with LiCl), the high capacity type battery electrolyte adds 420 grams (being 1.2M electricity liquid), the high power type battery electrolyte adds 520 grams (being 1.5M electricity liquid), the lithium bar 20-25 gram that adds 3mm * 40mm * 0.3mm at last in solution surface, can not must stir, the solution of configuration is carried out reflux purified 12 hours.In the solution of purifying that refluxes, feed the SO of 240 grams
2, in the environment of humidity dew point value≤-35 ℃, filter packing then and promptly obtain qualified electrolyte.
Claims (5)
1. a lithium thionyl chloride cell is characterized in that: may further comprise the steps successively with the preparation method of electrolyte:
A. with SOCl
2Carry out rectification and purification;
B. the SOCl after rectifying in the environment of humidity dew point value≤-25 ℃
2Solution adds LiAlCl
4, add lithium metal then;
C. solution being carried out reflux purified 12 hours at least;
D. in solution, inject SO
2Gas;
E. in the environment of humidity dew point value≤-35 ℃, filter, make electrolyte.
2. preparation method according to claim 1 is characterized in that: to the SO of solution injection
2Gas weight is the 5%-10% of solution weight.
3. preparation method according to claim 1 is characterized in that: to SOCl
2Solution adds LiAlCl
4Weight ratio be SOCl
2: LiAlCl
4=1000: 100-200.
4. according to claim 1 or 3 described preparation methods, it is characterized in that: LiAlCl
4By waiting anhydrous AlCl of mole
3And LiCl
2Fusion forms.
5. according to claim 1 or 3 described preparation methods, it is characterized in that: press LiAlCl
4: lithium bar=10-20: the ratio of 1 (weight ratio) adds lithium metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100613261A CN1622383A (en) | 2004-12-13 | 2004-12-13 | Preparing method of electrolyte for lithium thionyl chloride cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100613261A CN1622383A (en) | 2004-12-13 | 2004-12-13 | Preparing method of electrolyte for lithium thionyl chloride cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1622383A true CN1622383A (en) | 2005-06-01 |
Family
ID=34764489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004100613261A Pending CN1622383A (en) | 2004-12-13 | 2004-12-13 | Preparing method of electrolyte for lithium thionyl chloride cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1622383A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101102000B (en) * | 2007-07-17 | 2010-05-19 | 中国地质大学（武汉） | Lithium thionyl chloride battery electrolyte and its making method |
| CN102709599A (en) * | 2011-04-29 | 2012-10-03 | 苏州金科发锂电池有限公司 | Manufacturing method of lithium/thionyl chloride battery electrolyte material |
| CN104835971A (en) * | 2015-03-25 | 2015-08-12 | 武汉孚安特科技有限公司 | A preparing method of an electrolyte of a lithium-thionyl chloride cell |
| CN106129467A (en) * | 2016-08-31 | 2016-11-16 | 襄阳艾克特电池科技股份有限公司 | A kind of lithium thionyl chloride battery electrolyte manufacture method |
| CN106169608A (en) * | 2016-08-31 | 2016-11-30 | 襄阳艾克特电池科技股份有限公司 | A kind of lithium thionyl chloride battery electrolyte manufacture method |
-
2004
- 2004-12-13 CN CNA2004100613261A patent/CN1622383A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101102000B (en) * | 2007-07-17 | 2010-05-19 | 中国地质大学（武汉） | Lithium thionyl chloride battery electrolyte and its making method |
| CN102709599A (en) * | 2011-04-29 | 2012-10-03 | 苏州金科发锂电池有限公司 | Manufacturing method of lithium/thionyl chloride battery electrolyte material |
| CN104835971A (en) * | 2015-03-25 | 2015-08-12 | 武汉孚安特科技有限公司 | A preparing method of an electrolyte of a lithium-thionyl chloride cell |
| CN106129467A (en) * | 2016-08-31 | 2016-11-16 | 襄阳艾克特电池科技股份有限公司 | A kind of lithium thionyl chloride battery electrolyte manufacture method |
| CN106169608A (en) * | 2016-08-31 | 2016-11-30 | 襄阳艾克特电池科技股份有限公司 | A kind of lithium thionyl chloride battery electrolyte manufacture method |
| CN106129467B (en) * | 2016-08-31 | 2019-06-25 | 襄阳艾克特电池科技股份有限公司 | A kind of lithium thionyl chloride battery electrolyte production method |
| CN106169608B (en) * | 2016-08-31 | 2019-08-20 | 襄阳艾克特电池科技股份有限公司 | A kind of lithium thionyl chloride battery electrolyte production method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |