A method for measuring the purity of dichlorosulfonimide by chemical method

A technology of dichlorosulfonimide and chemical method, which is applied in the direction of material analysis by observing the influence of chemical indicators, material electrochemical variables, and analysis by making materials undergo chemical reactions, etc., to achieve low cost and fast method , the effect of highlighting the substantive characteristics

Active Publication Date: 2020-08-28
JIUJIANG TINCI ADVANCED MATERIALS CO LTD
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Problems solved by technology

[0004] At present, there is no relevant literature and patent report on the determination method of the purity of difluorosulfonimide. Therefore, it is necessary to design a method for the determination of the purity of dichlorosulfonimide by chemical method.

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  • A method for measuring the purity of dichlorosulfonimide by chemical method
  • A method for measuring the purity of dichlorosulfonimide by chemical method
  • A method for measuring the purity of dichlorosulfonimide by chemical method

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Embodiment Construction

[0048] The present invention is further described below in conjunction with specific embodiment:

[0049] A method for chemically measuring the purity of dichlorosulfonimide, comprising the following steps:

[0050] The first step, the determination of nitrogen content in dichlorosulfonimide;

[0051] Weigh a certain amount of dichlorosulfonimide and add water to fully hydrolyze, add a certain volume of nitric acid (in practical applications, hydrochloric acid or perchloric acid can be used instead of nitric acid), add water to constant volume, and use Sodium nitrite solution is titrated, and starch potassium iodide test paper is used as the external indicator, and the volume of sodium nitrite solution consumed is recorded as the end point of the titration until the purple spots appear on the test paper. The calculation formula is as follows:

[0052]

[0053] In the formula:

[0054] n(N): Nitrogen content in dichlorosulfonimide, mol / g;

[0055] c 1 : concentration of ...

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Abstract

The invention discloses a method for determining the purity of BCSA with a chemical method, comprising the following steps: firstly, determining the content of nitrogen in BCSA; secondarily, determining the content of chlorine in BCSA; thirdly, calculating the purity of BCSA according to different conditions. The method for determining the purity of BCSA with a chemical method adopts a pure chemical method to determine the purity of BCSA, and the method is rapid, sensitive, accurate, low in cost, and suitable for wide occasions, and has prominent substantive features and remarkable advance.

Description

technical field [0001] The invention relates to a method for measuring the purity of bisfluorosulfonimide, in particular to a method for measuring the purity of bischlorosulfonimide with a chemical method. Background technique [0002] The basic research and application of lithium-ion batteries have quickly become one of the hot spots in international electrochemical research. The electrolyte is an important factor in the formation of lithium-ion batteries. By optimizing the electrolyte system, the composition of the SEI film at the electrode interface and battery performance can be improved. Increase the reversible capacity of the electrode, prolong the cycle life, and improve the charge and discharge performance of the electrode. Therefore, the development of electrolytes with superior performance is of great significance to improve the market competition of lithium-ion batteries. [0003] Bisfluorosulfonyl imide salts, especially lithium bisfluorosulfonimide salts, becau...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78G01N27/42
CPCG01N21/78G01N27/42
Inventor 董晓莲孙孝元韩玉英
Owner JIUJIANG TINCI ADVANCED MATERIALS CO LTD
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