Full vanadium ion fluid cell electrolyte and preparing process thereof

A technology for flow batteries and electrolytes, applied in secondary batteries, regenerative fuel cells, secondary battery parts, etc., can solve the problem of undisclosed charge and discharge performance of electrolytes, affecting stability and conductivity, and difficult to adapt to low-temperature environments. and other problems to achieve the effect of reducing viscosity, improving electrical conductivity, improving stability and electrical conductivity

Inactive Publication Date: 2006-01-11
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +1
View PDF1 Cites 41 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main component of the existing vanadium electrolyte is vanadium sulfate [positive electrode (VO 2 ) 2 SO 4 and VOSO 4 , negative pole V 2 (SO 4 ) 3 and VSO 4 ] and sulfuric acid and water, there are defects of high viscosity, affecting its stability and conductivity, especially difficult to adapt to low temperature environment
Chinese patent (publication number CN 1507103) "high-energy static vanadium battery" adds stabilizers such as alcohols, organic acids, salts or polymer compounds in the vanadium electrolyte, "can make the concentration of pentavalent and divalent vanadium ions exceed the limit concentration It will not precipitate or separate out, and can form a collo

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] Example 1

[0018] Weigh 2000 grams of qualified vanadium solution (0.349mol / L), add concentrated sulfuric acid to pH 1.0, and pass in SO 2 To react, add sodium carbonate to pH 4.5, filter, and dissolve the precipitate in sulfuric acid and water (60mL sulfuric acid, 200mL water) to obtain 300mL blue vanadyl sulfate sulfuric acid aqueous solution, test: sulfuric acid concentration 2mol / L, vanadium concentration is 2mol / L. The above vanadium solution is placed at the cathode of the electrolytic cell; 2mol / L sulfuric acid and 1.2mol / L Na are prepared 2 SO 4 The solution is placed on the anode of the electrolytic cell; the constant current method is used for electrolysis, and the current density is 50mA / cm 2 ; The potential value of electrolysis to vanadium electrolyte is 200mV, and the electrolytic solution is analyzed by potentiometric titration, and the ratio of the concentration of tetravalent vanadium and the concentration of trivalent vanadium is 1:1. Take 35 mL each of t...

Example Embodiment

[0022] Example 2

[0023] Weigh 2000 grams of qualified vanadium solution (0.349mol / L), add concentrated sulfuric acid to pH 1.0, and pass in SO 2 For reaction, add sodium carbonate to pH 4.2, filter, return the filtrate to qualified vanadium solution for repeated use, and dissolve the precipitate in a solution of sulfuric acid, water and ethanol (sulfuric acid 60mL, water 80mL and ethanol 120mL), add Na 2 SO 4 6 grams, 4 grams of sodium pyrophosphate, to obtain 300 mL of blue vanadyl sulfate sulfuric acid ethanol solution, test: sulfuric acid concentration 2mol / L, vanadium concentration 2mol / L. The above vanadium solution is placed at the cathode of the electrolytic cell; 2mol / L sulfuric acid and 1.2mol / L Na are prepared 2 SO 4 The solution is placed on the anode of the electrolytic cell; the constant current method is used for electrolysis, and the current density is 50mA / cm 2 ; The potential value of electrolysis to vanadium electrolyte is 200mV, and the electrolytic solution i...

Example Embodiment

[0030] Example 3

[0031] The total vanadium concentration of qualified vanadium solution (Pangang Panhong Company) is 0.349mol / L

[0032] H 2 SO 4 : Analytically pure, d=1.84

[0033] Liquid SO 2 : Analytical pure

[0034] Sodium carbonate: analytically pure

[0035] Ethanol: analytically pure

[0036] Na 2 SO 4 : Analytical pure

[0037] Sodium pyrophosphate: analytically pure

[0038] Sodium fluorosilicate: analytically pure

[0039] Hydrogen peroxide: analytically pure, 30%

[0040] Vanadium battery model making: frame plate made of polyurethane plate, conductive diaphragm adopts activated Nafion proton exchange membrane, cathode cell 100×100×5mm, anode cell 100×100×5mm, 100×100×1.5mm self-made graphite electrodes.

[0041] Weigh 2000 grams of qualified vanadium solution, add concentrated sulfuric acid to pH 1.0, and pass in SO 2 For reaction, add sodium carbonate to pH 4.2, filter, and return the filtrate to qualified vanadium solution for reuse. The precipitate is dissolved ...

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

This invention relates to an electrolyte of a full-vanadium ionic fluid-flow battery composed of V salt sulfate, H2So4, water, alcohol and additives, which are Na2SO4, Na pyrophosphate, salufer and hydrogen peroxide. This invention also provides a preparation method: pumping qualified V liquid from a V-plant into a reaction tank, regulating the PH value of the solution and inletting liquid SO2 into it to be recovered, then the PH value of the solution is regulated with Na2SO4 to deposit VO2 to be dissolved in the solution containing H2SO4, water and alcohol to be added with the additives to be electrolyzed in the tank to get the V electrolyte with 50% of 3valence and 4 valence V separately and density of 1.0mol/L~4.2mol/L .

Description

technical field [0001] The invention relates to an energy storage type liquid flow battery—all-vanadium ion flow battery, in particular to an electrolyte solution of an all-vanadium ion flow battery. Background technique [0002] Vanadium battery is one of the green storage batteries with strong development momentum at present, and its manufacture, use and disposal process do not produce harmful substances. It has a special battery structure, and its active material is separated from the electric stack, which is similar to a fuel cell. The manufacturing cost is lower than that of a fuel cell, and its production process is relatively simpler than that of a lead-acid battery and a fuel cell. All-vanadium ion flow battery has high relative electrode potential of ions in different valence states, can be deeply discharged at high current density, charged quickly, and has high energy conversion rate. It can prepare megawatt-level battery packs and provide electric energy with high...

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): H01M10/02H01M10/36H01B1/00C01G31/00H01M8/18
CPCY02E60/10Y02E60/50
Inventor 李林德张波潘进黄可龙刘素琴李晓刚陈立泉
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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