CN1314960C - Method for measurement of solvent in lithium ion battery electrolyte - Google Patents
Method for measurement of solvent in lithium ion battery electrolyte Download PDFInfo
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- CN1314960C CN1314960C CNB2004100661759A CN200410066175A CN1314960C CN 1314960 C CN1314960 C CN 1314960C CN B2004100661759 A CNB2004100661759 A CN B2004100661759A CN 200410066175 A CN200410066175 A CN 200410066175A CN 1314960 C CN1314960 C CN 1314960C
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Abstract
The present invention discloses a method for measuring the contents of the solvent components in the electrolyte of a lithium ion battery, which mainly comprises the following steps: an electrolyte solvent of some lithium ion battery is firstly taken to be used as a standard solvent, a solvent to be measured and the standard solvent are prepared into a mixed solvent according to the mass ratio of 0.5:1 to 2:1, the chromatographic content of the standard solvent and the chromatographic content of the solvent to be measured are obtained with a gas chromatography area normalization method, and relative correction factors of relative standard solvents of solvents to be measured are obtained; chromatographic analysis is then carried out on the electrolyte of a lithium ion battery to be measured under the same chromatographic condition, and the contents of the solvent components in the electrolyte of the lithium ion battery are obtained with the gas chromatography area normalization method; result accuracy conveniently and quickly obtained with method of the present invention is high.
Description
Technical field
The present invention relates to a kind of method of measuring the content of each solvent component in the lithium-ion battery electrolytes.
Background technology
Because the performances such as specific inductive capacity of different solvents are different, therefore by the variety classes solvent, and the performances such as conductivity of the lithium-ion battery electrolytes of different proportion solvent composition different fully, thereby different solvent compositions can directly have influence on the performance index of lithium-ion battery electrolytes, is directly connected to the quality of product.Therefore, select suitable lithium-ion battery electrolytes component Determination on content method for use, to the monitoring in the electrolytic solution production run, guarantee that prescription is correct and the analysis of known electrolytes solvent component etc. all had crucial effect.
Summary of the invention
The present invention will provide a kind of can accurately measure solvent component Determination on content method in the lithium-ion battery electrolytes.
The technical solution used in the present invention is: described assay method, mainly may further comprise the steps: (one) gets a kind of lithium-ion battery electrolytes solvent as standard solvent, with solvent to be measured and this standard solvent in mass ratio 0.5: 1-2: 1 ratio is made into mixed solvent, after mixing, carry out stratographic analysis, obtain the chromatogram content of standard solvent and the chromatogram content of solvent to be measured with the gas chromatography area normalization method, try to achieve the relative correction factor of each solvent to be measured then respectively with following formula, that is:
In the formula: F
n: the correction factor of solvent relative standard solvent to be measured,
Mn: solvent actual content to be measured,
M: the standard solvent actual content,
An: solvent chromatogram content to be measured,
A: standard solvent chromatogram content,
N: be the sequence number of solvent to be measured;
(2) again under identical chromatographic conditions, lithium-ion battery electrolytes to be measured is carried out stratographic analysis, obtain the chromatogram content of each solvent composition respectively with the gas chromatography area normalization method, and then the relative correction factor that obtains in the utilization step (), proofread and correct normalization method according to area, try to achieve the content of each solvent component in the lithium-ion battery electrolytes to be measured with following formula, that is:
Fn: the correction factor of solvent relative standard solvent to be measured,
An: the chromatogram content of solvent to be measured,
N: be the sequence number of solvent to be measured.
The further technical scheme of the present invention is: with solvent to be measured and standard solvent in 0.8: 1-1.3: 1 ratio is made into mixed solvent.
The present invention further technical scheme is: above-mentioned standard solvent is selected DMC (dimethyl carbonate) for use.
Advantage of the present invention is: use method of the present invention, fast convenient, result's precision is higher.
Embodiment
The invention will be further described below in conjunction with specific embodiment.
1, asks the relative correction factor of different solvents.Because DMC (dimethyl carbonate) is a common solvent in the electrolytic solution, thereby present embodiment selects the DMC of content 〉=99.9% as standard substance.Be made into mixed solvent with solvent to be measured and DMC in 1: 1 ratio, the relative correction factor of trying to achieve EMC (methyl ethyl carbonate), DEC (diethyl carbonate), three kinds of solvents of EC (ethylene carbonate) respectively with method of the present invention is respectively then:
F
EMC＝0.5589 F
DEC＝0.4693 F
EC＝1.1650
2, get above-mentioned three kinds of solvents and be made into following two kinds of electrolytic solution respectively:
Sample 1:DMC: EMC: EC=1: 1: 1
Sample 2:DMC: DEC: EC=1: 1: 1,
And then above-mentioned two kinds of electrolytic solution are carried out stratographic analysis respectively with method of the present invention, the content value after obtaining proofreading and correct is made as G; And with common gas chromatography area normalization method above-mentioned two kinds of electrolytic solution are carried out stratographic analysis respectively, obtain the spectrogram content value and be made as H, the two relatively, result such as following table:
| Spectrogram content value H | Proofread and correct back content value G | |||||||
| DMC | EMC | DEC | EC | DMC | EMC | DEC | EC | |
| Sample 1 | 26.8343 | 49.5644 | / | 23.5291 | 32.7459 | 33.8041 | / | 33.4500 |
| Sample 2 | 24.2088 | / | 54.5731 | 21.2210 | 32.4839 | / | 34.3430 | 33.1732 |
More as can be known, measure the content of lithium-ion battery electrolytes solvent composition with method of the present invention by last table, precision is higher, can satisfy ± 1.5% error requirements.
Claims (3)
1, the assay method of solvent in the lithium-ion battery electrolytes is characterized in that: may further comprise the steps:
(1) gets a kind of lithium-ion battery electrolytes solvent as standard solvent, with solvent to be measured and this standard solvent in mass ratio 0.5: 1-2: 1 ratio is made into mixed solvent, after mixing, carry out stratographic analysis, obtain the chromatogram content of standard solvent and the chromatogram content of solvent to be measured with the gas chromatography area normalization method, try to achieve the relative correction factor of each solvent to be measured then respectively with following formula, that is:
In the formula: F
n: the correction factor of solvent relative standard solvent to be measured,
Mn: solvent actual content to be measured,
M: the standard solvent actual content,
An: solvent chromatogram content to be measured,
A: standard solvent chromatogram content,
N: be the sequence number of solvent to be measured;
(2) again under identical chromatographic conditions, lithium-ion battery electrolytes to be measured is carried out stratographic analysis, obtain the chromatogram content of each solvent composition respectively with the gas chromatography area normalization method, and then the relative correction factor that obtains in the utilization step (), proofread and correct normalization method according to area, try to achieve the content of each solvent component in the lithium-ion battery electrolytes to be measured with following formula, that is:
Fn: the correction factor of solvent relative standard solvent to be measured,
An: solvent chromatogram content to be measured,
N: be the sequence number of solvent to be measured.
2, assay method according to claim 1 is characterized in that: with solvent to be measured and standard solvent in 0.8: 1-1.3: 1 ratio is made into mixed solvent.
3, assay method according to claim 1 and 2 is characterized in that: described standard solvent is selected dimethyl carbonate for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100661759A CN1314960C (en) | 2004-12-10 | 2004-12-10 | Method for measurement of solvent in lithium ion battery electrolyte |
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| CNB2004100661759A CN1314960C (en) | 2004-12-10 | 2004-12-10 | Method for measurement of solvent in lithium ion battery electrolyte |
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| CN1621831A CN1621831A (en) | 2005-06-01 |
| CN1314960C true CN1314960C (en) | 2007-05-09 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100368801C (en) * | 2006-07-21 | 2008-02-13 | 天津力神电池股份有限公司 | Method for measuring organic component in lithium ion cell electrolyte |
| CN104792901B (en) * | 2015-05-06 | 2016-10-05 | 哈尔滨工业大学 | A kind of method for quantitative measuring of lithium-ion battery electrolytes solvent |
| CN105449297B (en) * | 2015-12-28 | 2017-11-03 | 东莞新能源科技有限公司 | The quantitative analysis method of electrolyte consumption |
| CN111257470B (en) * | 2020-03-03 | 2023-05-23 | 广州天赐高新材料股份有限公司 | Pretreatment method and detection method for detection of electrolyte organic solvent |
| CN112748103B (en) * | 2020-12-23 | 2023-10-24 | 北京卫蓝新能源科技有限公司 | Method for measuring content of liquid electrolyte in battery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1104377A (en) * | 1994-08-15 | 1995-06-28 | 石家庄经济技术开发区光耀锂电池厂 | Lithium cell electrolyte and its preparation method |
| JP2001174446A (en) * | 1999-12-20 | 2001-06-29 | Seimi Chem Co Ltd | Cation quantitatively analyzing method by ion chromatography |
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- 2004-12-10 CN CNB2004100661759A patent/CN1314960C/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1104377A (en) * | 1994-08-15 | 1995-06-28 | 石家庄经济技术开发区光耀锂电池厂 | Lithium cell electrolyte and its preparation method |
| JP2001174446A (en) * | 1999-12-20 | 2001-06-29 | Seimi Chem Co Ltd | Cation quantitatively analyzing method by ion chromatography |
Non-Patent Citations (6)
| Title |
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| 有机溶剂对锂离子电池性能的影响 张勇 胡信国 张翠芬，电池，第34卷第1期 2004 * |
| 有机溶剂对锂离子电池性能的影响 张勇 胡信国 张翠芬，电池，第34卷第1期 2004;锂离子电池的有机电解液 陈德钧，电池工业，第4卷第4期 1999;锂离子电池电解液 廖红英 程宝英 郝志强，产业论坛，第9期 2003;锂离子电池电解液的研究进展 吴萌 栾和林 姚文，矿冶，第13卷第3期 2004;锂离子电池有机电解液研究 庄全超 武山 刘庆元 陆兆达，电化学，第7卷第4期 2001 * |
| 锂离子电池有机电解液研究 庄全超 武山 刘庆元 陆兆达，电化学，第7卷第4期 2001 * |
| 锂离子电池电解液 廖红英 程宝英 郝志强，产业论坛，第9期 2003 * |
| 锂离子电池电解液的研究进展 吴萌 栾和林 姚文，矿冶，第13卷第3期 2004 * |
| 锂离子电池的有机电解液 陈德钧，电池工业，第4卷第4期 1999 * |
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