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

Method for measuring chlorine content of vanadium battery electrolyte solution

A technology of electrolyte and vanadium battery, which is applied in the direction of color/spectral characteristic measurement, etc., and can solve the problem of inability to measure the chloride ion content of vanadium battery

Active Publication Date: 2014-09-10
大力储能技术湖北有限责任公司
View PDF5 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN103048310A discloses a method for measuring trace amounts of Cr, Fe, Mo, Ni, Co, Cu, Mn, Ti, Zn, Si, Al, As, P, Ca, Mg, Pb in vanadium electrolyte with inductively coupled plasma emission spectrometer The detection method of the content of impurity elements, this method is mainly suitable for the determination of trace metal elements in the vanadium electrolyte, but cannot determine the content of trace chloride ions in the electrolyte of vanadium batteries

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
  • Method for measuring chlorine content of vanadium battery electrolyte solution
  • Method for measuring chlorine content of vanadium battery electrolyte solution
  • Method for measuring chlorine content of vanadium battery electrolyte solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Preparation of analysis sample: pipette 4ml of vanadium battery electrolyte into a 100ml beaker, add a certain amount of sulfur-phosphorus mixed acid, then dropwise add potassium permanganate to oxidize until the solution is reddish, let it stand for 5min, add 5ml of urea, dropwise 4 to 6 drops of sodium nitrite make the solution yellow, transfer it to a 100ml volumetric flask, shake well, add water to volume.

[0026] Drawing of the working curve: Take 25ml of pure pentavalent vanadium solution in six 50ml colorimetric tubes, add 0mL, 1mL, 2mL, 3mL, 4mL, 5mL of chlorine standard solution, then add 2ml of nitric acid, 2ml of silver nitrate, add water Dilute to the scale, and after standing for 20 minutes, use the sample without chlorine standard solution as a blank, measure the absorbance of the other 5 samples at a wavelength of 460nm, take the chloride ion concentration as the abscissa, and the corresponding absorbance as the ordinate, draw Working curve, working curv...

Embodiment 2

[0032] Except for the following differences, all the others are the same as in Example 1.

[0033]Drawing of the working curve: pipette 4ml of the prepared trivalent and tetravalent vanadium electrolytes into a 100ml beaker, add a certain amount of sulfur-phosphorus mixed acid, then add dropwise potassium permanganate to oxidize until the solution is reddish, let stand for 5min, add 5ml For urea, add 4 to 6 drops of sodium nitrite dropwise to make the solution turn yellow, transfer it to a 100ml volumetric flask, shake well, and add water to make up the volume. Take 25ml of oxidized pentavalent vanadium solution in six 50ml colorimetric tubes, add 0mL, 1mL, 2mL, 3mL, 4mL, 5mL of chlorine standard solution, add 2ml of nitric acid, 2ml of silver nitrate, dilute to the mark with water , after standing still for 20min, take the sample without chlorine standard solution as blank, measure the absorbance of the other 5 samples at a wavelength of 460nm, take the chloride ion concentra...

Embodiment 3

[0035] Except for the following differences, all the others are the same as in Example 1.

[0036] Drawing of the working curve: Take 5ml of pure pentavalent vanadium solution in eight 25ml colorimetric tubes, add 0mL, 0.5mL, 1mL, 2mL, 3mL, 4mL, 6mL, 8mL chlorine standard solution, and then add 2ml of nitric acid, 2ml of silver nitrate, dilute to the mark with water, let it stand for 20min, take the sample without chlorine standard solution as blank, measure the absorbance of other 7 samples at the wavelength of 460nm, take the chloride ion concentration as the abscissa, and the corresponding absorbance As the ordinate, draw the working curve, the working curve is as figure 2 shown.

[0037] Sample analysis: Pipette 5mL pentavalent vanadium electrolyte into 25mL colorimetric tubes respectively, add 2mL nitric acid in sequence and shake well, one of them is added with 2mL silver nitrate solution as the test sample, and the other is not The sample with silver nitrate was 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
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for measuring the chlorine content of a vanadium battery electrolyte solution. The concentration of chloride ions in the vanadium battery electrolyte solution is measured through the nephelometry. The method comprises the steps that (1), all vanadium ions in the vanadium battery electrolyte solution are converted into pentavalent vanadium ions, and an analysis sample is obtained and is diluted to be at multiples suitable for analysis; (2), a working curve is drawn out; (3), the absorbance of the diluted analysis sample is measured, and the corresponding chlorine concentration is obtained according to the measured absorbance and the working curve; (4), the chlorine concentration is multiplied by the dilution ratio, and finally the concentration of the chloride ions in the vanadium battery electrolyte solution is obtained. According to the method, the content of the chloride ions can be measured easily, rapidly and accurately, so that the content of the chlorine ions in the vanadium battery electrolyte solution is monitored in real time.

Description

technical field [0001] The invention belongs to the field of element detection and analysis, and more specifically relates to a method for measuring the content of trace chloride ions in a vanadium battery electrolyte. Background technique [0002] The vanadium redox flow battery system consists of stacks, electrolyte solutions, electrolyte solution storage and supply systems, system control systems, charge and discharge systems and other parts. The core part of the system is the electrolyte and the stack. The electrolyte is composed of vanadium ions in different valence states and a certain concentration of sulfuric acid. The electrolyte circulates in the stack and generates electricity on the porous electrodes on both sides of the ion exchange membrane. reduction and oxidation reactions. The presence of impurity ions in the electrolyte will reduce the stability of the electrolyte, the charge and discharge efficiency of the battery, the rate of capacity decay and the life ...

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): G01N21/31
Inventor 刘芳玉史小虎余龙海陈若媛叶丽英
Owner 大力储能技术湖北有限责任公司
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