CN103268958A - Processing method of lithium-ion battery electrolyte - Google Patents
Processing method of lithium-ion battery electrolyte Download PDFInfo
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- CN103268958A CN103268958A CN2013101916044A CN201310191604A CN103268958A CN 103268958 A CN103268958 A CN 103268958A CN 2013101916044 A CN2013101916044 A CN 2013101916044A CN 201310191604 A CN201310191604 A CN 201310191604A CN 103268958 A CN103268958 A CN 103268958A
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- China
- Prior art keywords
- electrolyte
- ion battery
- lithium
- processing method
- cao
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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
Abstract
The invention provides a processing method of a lithium-ion battery electrolyte, which comprises the following operating steps of: firstly, drying CaO for 1 to 3 hours at the temperature of 650 DEG C to 800 DEG C; then adding excessive CaO to the electrolyte in the environment that the absolute moisture content is less than and equal to 20 ppm, and stirring and mixing for 1 to 24 hours; and finally, filtering mixed liquid after reaction to obtain mother liquid as the processed electrolyte. Water, hydrofluoric acid and impurities are removed from the electrolyte processed by using the method, gas and electrode corrosion of a manufactured lithium-ion battery can be prevented, and the charge and discharge capacity of the manufactured lithium-ion battery is enhanced, thereby effectively improving the performance and prolonging the service life of the battery.
Description
Technical field
The present invention relates to the lithium ion battery field, relate in particular to a kind of processing method of lithium-ion battery electrolytes.
Background technology
The water content of lithium-ion battery electrolytes and the content of hydrofluoric acid have strict requirement, this be because lithium ion battery in when work, the residing current potential of positive and negative limit solution is respectively about-3.0V and 1.2V, such current potential is the existence that water or hydrofluoric acid all can not be stable, finally all can be transformed into gas, the life-span of battery is caused very big influence; Hydrofluoric acid also produces very big corrosion to the electrode of battery in addition.Therefore from electrolyte except anhydrate and hydrofluoric acid is the problem that people pay close attention to always.Present way is before electrolyte injects or after injecting, the adding additive, but reactant also remains in the electrolyte, still battery worked the mischief.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of from electrolyte, removing to anhydrate and hydrofluoric acid, and remove impurity, effectively improve the processing method of the lithium-ion battery electrolytes in battery performance and life-span.
Technical scheme of the present invention is: the processing method of lithium-ion battery electrolytes, in electrolyte, add additive, and its improvements are that described additive is CaO, this processing method operating procedure is as follows:
(1) CaO was dried 1～3 hour under 650 ℃～800 ℃ temperature;
(2) with CaO electrolyte before the excessive adding injection battery in the environment of absolute moisture content≤20ppm of oven dry, mixed 1～24 hour;
(3) mixed liquor that has reacted is filtered, mother liquor is the electrolyte after the processing.
In the above-mentioned steps (2), the mass percent that the addition of CaO accounts for electrolyte is 0.1%～0.2%; In the above-mentioned steps (3), adopt ash free filter paper to filter, earlier filter paper is dried before filtering.
The present invention adds CaO in electrolyte, through chemical reaction, can effectively remove water and hydrofluoric acid, and reaction equation is as follows:
CaO(is excessive)+H
2O → Ca(OH)
2
2CaO(is excessive)+2HF → Ca(OH)
2+ CaF
2
Reaction product and excess amount of Ca O particle through considering, are removed impurity, thereby are improved the electrolyte quality greatly again, make the lithium ion battery that is made into avoid producing gas and electrode corrosion, strengthen charging and discharging capabilities, and then improve battery serviceability and life-span.
Embodiment
Further specify the present invention below by embodiment.
1, with CaO 700 ℃ of (two: 650 ℃ of examples, three: 800 ℃ of examples) 2 hours (examples two: 3 hours of baking in the muffle furnace, example three: 1 hours), put into the glove box (example two, three: low dew point drying shed) of absolute moisture content≤20ppm after cooling is taken out immediately;
2, in the environment of above-mentioned absolute moisture content≤20ppm, to account for electrolyte quality percentage 0.15%(example two: 0.1%, example three: 0.2%) oven dry CaO joins in the electrolyte, stir 10 hours (examples two: 4 hours, example three: 20 hours), fully carry out chemical reaction, remove water and hydrofluoric acid in the electrolyte;
3, with the anhydrous no ash content filter paper after the oven dry above-mentioned reacted mixed liquor is filtered, remove impurity, mother liquor is the electrolyte after the processing.
Claims (3)
1. the processing method of a lithium-ion battery electrolytes adds additive in electrolyte, it is characterized in that described additive is CaO, and this processing method operating procedure is as follows:
(1) CaO was dried 1～3 hour under 650 ℃～800 ℃ temperature;
(2) with CaO electrolyte before the excessive adding injection battery in the environment of absolute moisture content≤20ppm of oven dry, mixed 1～24 hour;
(3) mixed liquor that has reacted is filtered, mother liquor is the electrolyte after the processing.
2. the processing method of lithium-ion battery electrolytes according to claim 1, it is characterized in that: in the above-mentioned steps (2), the mass percent that the addition of CaO accounts for electrolyte is 0.1%～0.2%.
3. according to the processing method of the described lithium-ion battery electrolytes of claim 1, it is characterized in that: in the above-mentioned steps (3), adopt ash free filter paper to filter, earlier filter paper is dried before filtering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101916044A CN103268958A (en) | 2013-05-22 | 2013-05-22 | Processing method of lithium-ion battery electrolyte |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101916044A CN103268958A (en) | 2013-05-22 | 2013-05-22 | Processing method of lithium-ion battery electrolyte |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103268958A true CN103268958A (en) | 2013-08-28 |
Family
ID=49012575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101916044A Pending CN103268958A (en) | 2013-05-22 | 2013-05-22 | Processing method of lithium-ion battery electrolyte |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103268958A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1571198A (en) * | 2003-07-12 | 2005-01-26 | 鸿富锦精密工业（深圳）有限公司 | Lithium secondary battery anode and lithium secondary battery using the same |
| US20050058903A1 (en) * | 2003-09-16 | 2005-03-17 | Cahit Eylem | Primary alkaline battery containing bismuth metal oxide |
| CN1700499A (en) * | 2005-05-23 | 2005-11-23 | 华南师范大学 | Li-ion battery cathode film forming function electrolyte and its preparing process |
-
2013
- 2013-05-22 CN CN2013101916044A patent/CN103268958A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1571198A (en) * | 2003-07-12 | 2005-01-26 | 鸿富锦精密工业（深圳）有限公司 | Lithium secondary battery anode and lithium secondary battery using the same |
| US20050058903A1 (en) * | 2003-09-16 | 2005-03-17 | Cahit Eylem | Primary alkaline battery containing bismuth metal oxide |
| CN1700499A (en) * | 2005-05-23 | 2005-11-23 | 华南师范大学 | Li-ion battery cathode film forming function electrolyte and its preparing process |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130828 |