Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of method for rapid determination of lithium salt species in lithium-ion battery electrolyte

A lithium-ion battery and rapid determination technology, which is applied in the direction of measuring devices, material separation, instruments, etc., can solve the problems of lithium salts that are not disclosed in the literature, and achieve the effect of fast and simple testing process and accurate and stable measurement results

Inactive Publication Date: 2011-12-07
HEFEI GUOXUAN HIGH TECH POWER ENERGY
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still no document disclosing the determination method of lithium salt species in lithium-ion battery electrolyte

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
  • A kind of method for rapid determination of lithium salt species in lithium-ion battery electrolyte
  • A kind of method for rapid determination of lithium salt species in lithium-ion battery electrolyte
  • A kind of method for rapid determination of lithium salt species in lithium-ion battery electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Accurately weigh 0.100g LiPF 6 , 0.100g LiBF 4 , 0.100g LiClO 4 Dissolve them in deionized water respectively, and then make up to volume in 100ml volumetric flasks to complete the preparation of the mother liquors of the standard solutions of the three lithium salts.

[0017] Measure a certain amount of lithium salt standard solution mother liquor respectively again, dilute and obtain the standard solution of 5-20mg / L, because the present invention aims at proposing the method for measuring lithium salt species, therefore, this example only selects the standard solution of 5mg / L to come Determine the retention time of the standard lithium salt in the ion chromatogram, figure 1 The peaks of three lithium salts in ion chromatography are given. It can be seen that ion chromatography can effectively convert LiPF 6 、LiBF 4 and LiClO 4 The three kinds of lithium salts are separated, so as to realize the method for quickly identifying the lithium salt species by ion chro...

Embodiment 2

[0019] Add accurately weighed 0.100g LiPF to 10ml EC / EMC / DEC (1:1:1, V / V) electrolyte solvent 6 , 0.100g LiBF 4 and 0.100g LiClO 4 Wait for three kinds of lithium salts, make the lithium ion battery electrolyte that contains three kinds of lithium salts after fully mixing. Take 5ml of the above electrolyte solution and dilute it step by step with deionized water. After each dilution, the resulting aqueous solution is required to stand for 10 minutes before starting the next dilution until the sample to be tested with a lithium salt content of about 10mg / L is obtained. The same ion chromatographic test conditions were selected to test the retention time of lithium salt anions in the sample to be tested when measuring the standard lithium salt solution in Example 1. figure 2 The middle A spectral line is the lithium salt anion peak-out situation in the sample to be tested, and there are three peaks whose retention times are 13.4min, 16.5min and 24.1min in the spectrogram, and...

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 discloses a method for quickly determining the type of lithium salt in the electrolyte of a lithium ion battery, which mainly uses ion chromatography to measure LiPF6, LiBF4, LiClO4, LiBOB and other lithium salts with a concentration in the range of 5-100 mg / L standard solution, respectively to obtain the standard retention time of various lithium salt anion peaks; then add deionized water to the electrolyte sample to be tested and dilute until the lithium salt concentration is in the standard concentration range, and then use ion chromatography to determine the lithium salt standard solution The same test conditions test the peak retention time of the lithium salt anion, and compare the retention time with the standard retention time to determine the type of lithium salt in the electrolyte. The electrolytic solution of the present invention does not need pretreatment, and the test process is fast and simple, and the types of various lithium salts in the electrolytic solution can be determined simultaneously, and the measurement result is accurate and stable.

Description

technical field [0001] The invention relates to a method for quickly determining the type of lithium salt in the electrolyte solution of a lithium ion battery, and belongs to the technical field of chemical substance identification. Background technique: [0002] Due to the advantages of high energy density, high output voltage, long cycle life, and low environmental pollution, lithium-ion batteries have extremely important applications in electronic products, electric vehicles, aerospace and other fields. Electrode materials, electrolytes, and separators are the key components of lithium-ion batteries, and their performance directly determines the capacity and safety of the battery. At present, the lithium-ion battery electrolyte is mainly composed of solvents and electrolyte lithium salts. The solvents are mostly high-purity organic solvents of carbonate series, such as ethylene carbonate (EC), propylene carbonate (PC), dimethyl carbonate (DMC), Diethyl carbonate (DEC), e...

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): G01N30/02
Inventor 杨续来孙红梅刘成士周威艾顺徐小明
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com