Inorganic electrolyte lithium salt content detection method

An inorganic electrolyte and detection method technology, applied in the field of analytical chemistry, can solve the problems of high cost, rapid judgment of unsuitable content, production guidance needs, long detection cycle, etc., and achieve low detection cost, simple operation, and good repeatability Effect

Inactive Publication Date: 2018-03-16
甘肃立焘新能源科技发展有限公司
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the detection of lithium hexafluorophosphate adopts the national standard or the industry standard method in both the production process and the factory inspection. Although this type of detection method has high precision, the detection c

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Inorganic electrolyte lithium salt content detection method
  • Inorganic electrolyte lithium salt content detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1.1 Dissolve lithium hexafluorophosphate standard product in acetonitrile solvent, prepare standard solutions with different concentrations of 3%, 6%, 9%, 12%, 15%, 18%, etc., and put them in a 250ml graduated cylinder for use.

[0040] 1.2 Place a series of standard solutions with different concentrations obtained in 1.1 in a water bath at a constant temperature of 25°C for 30 minutes, then test the conductivity (Mettler-Tolito FE30K conductivity meter) respectively, and plot the data results to form a relationship curve. The conductivity curve of the standard solution is formed, such as figure 1 shown.

Embodiment 2

[0042]6 test samples (solvent is acetonitrile) water bath 25 ℃ of constant temperature 30min in the solvent method production process test electrical conductivity (each sample is all tested 6 times), the electrical conductivity curve of the standard solution that obtains in the comparison example 1 obtains The concentration results are shown in Table 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides an inorganic electrolyte lithium salt content detection method. The method comprises the following steps: a to-be-measured sample solution containing inorganic electrolyte lithium salt is subjected to constant-temperature standing, conductivity is tested, and according to a conductivity curve of an inorganic electrolyte lithium salt standard solution, the content of the inorganic electrolyte lithium salt in the to-be-measured sample solution can be obtained. Compared with the prior art, by using different concentrations of the inorganic electrolyte lithium salts in an organic solvent system and corresponding relation with conductivity in the solution system, so that concentration of the inorganic electrolyte lithium salt in the solution can be rapidly detected, the method has the advantages of simple operation and low detection cost, detection can be completed only in 3-5 min, quality control requirement during production can be completely satisfied, and the detection result has good repeatability.

Description

technical field [0001] The invention belongs to the technical field of analytical chemistry, and in particular relates to a method for detecting the lithium salt content of an inorganic electrolyte. Background technique [0002] Electrolyte plays a very important role in lithium battery materials, known as "the blood of lithium ion batteries". As the electrolyte salt of secondary batteries, the main components are inorganic lithium salts and organic lithium salts, of which inorganic lithium salts include lithium perchlorate, lithium tetrafluoroborate, lithium hexafluoroarsenate and lithium hexafluorophosphate, and organic lithium salts currently include chelated boron class such as LiB(C 2 o 4 ) 3 , chelated phosphorus such as LiP(C 6 h 4 o 2 ) 3 , perfluorophosphine such as Li(RfPF 5 ), alkyl LiC(CF 3 SO 2 ) 3 , lithium imide LiN(CF 3 SO 2 ) 2 and other products. [0003] Lithium hexafluorophosphate is currently the most important electrolyte lithium salt use...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N27/06
CPCG01N27/06
Inventor 缪世伟
Owner 甘肃立焘新能源科技发展有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap