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Vanadyl-sulfate electrolyte preparation method applied to full-vanadium flow cell

A technology for the preparation of all-vanadium redox flow batteries and electrolytes, which is applied in the preparation of vanadium compounds, fuel cells, regenerative fuel cells, etc., can solve the problems of high cost and complicated process, and achieve the effect of low cost and simple process

Inactive Publication Date: 2015-01-28
QINGDAO QIANYUN HIGH TECH NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method also needs to prepare high-purity vanadium oxide, and the process is more complicated and the cost is higher.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Get 1000ml concentration and be 0.7mol / L, the vanadyl sulfate solution of pH value 0.23, this solution contains impurities such as iron, manganese, chromium, aluminum, titanium, magnesium and calcium, wherein contains iron 1.6g / L, iron and vanadyl sulfate The mass ratio is 0.015, and the VOSO4 / ∑Me mass ratio is 1200;

[0027] In the above-mentioned vanadyl sulfate stripping solution, add analytical pure ammonia water to adjust pH=2.75, add ascorbic acid with a vanadium content of 0.75% to adjust the potential value of the solution to 170mV, stir and dissolve at a slow speed; use P204: TBP: sulfonated kerosene weight ratio is 30 : 10: 60 extraction agent three-stage countercurrent extraction, compare O / A=3: 1, time 7min, after two-phase separation, wash vanadium-loaded organic phase with the dilute sulfuric acid solution of 2g / L, compare O / A= 5:1, washing time 3min. Using 100g / L of sulfuric acid solution for three-stage countercurrent back extraction, compared with O / A=...

Embodiment 2

[0030]Get 1000ml concentration and be 0.2mol / L, the vanadyl sulfate solution of pH value 0.60, this solution contains impurities such as iron, manganese, chromium, aluminum, titanium, magnesium and calcium, wherein contains iron 0.55g / L, iron and vanadyl sulfate The mass ratio is 0.018, and the VOSO4 / ∑Me mass ratio is 1500;

[0031] In the above-mentioned vanadyl sulfate stripping solution, add analytical pure ammonia water to adjust pH=2.50, add ascorbic acid with a vanadium content of 0.5% to adjust the potential value of the solution to 190mV, stir and dissolve at a slow speed; use P507: TBP: sulfonated kerosene weight ratio is 30 : 10: 60 extraction agent three-stage countercurrent extraction, compare O / A=3: 1, time 7min, after two-phase separation, wash vanadium-loaded organic phase with the dilute sulfuric acid solution of 3g / L, compare O / A= 5:1, washing time 3min. Use 100g / L of sulfuric acid solution for three-stage countercurrent back extraction, compared with O / A=3:1...

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PUM

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Abstract

The invention relates to a preparation method for battery electrolyte, especially relates to a vanadyl-sulfate electrolyte preparation method applied to a full-vanadium flow cell. Compared with the prior art, the method takes vanadyl-sulfate solution, obtained through a conventional method for extracting vanadium from vanadium slags and stone coal, as an object. The pH value of the solution is adjusted through alkali metal or alkaline-earth metal oxides or hydroxides. The separation of vanadium and iron ions is achieved through revivification and a method of multi-segment multi-stage counter-current extraction. The concentration of vanadyl sulfate is adjusted through distillation, and a vanadyl sulfate electrolyte is manufactured directly. The method is simple in technology, is low in cost, and achieves scale production.

Description

technical field [0001] The invention relates to a method for preparing a battery electrolyte, in particular to a method for preparing a vanadyl sulfate electrolyte applied to an all-vanadium redox flow battery. Background technique [0002] Vanadium redox flow battery (VRB) is an excellent energy storage device. The capacity of the battery depends on the amount of electrolyte and the concentration of vanadium ions. The electrolyte can be placed separately from the battery. The battery has a long service life, high reliability, and can be quickly charged and discharged. It has great development prospects in photovoltaic power generation, wind power generation, peak shaving and valley filling. VRB batteries have no solid-state reaction, no change in the structure and form of electrode materials, and are cheap, safe and environmentally friendly, and low in operation and maintenance costs. [0003] A VRB battery consists of two electrolyte pools and layers of battery cells. T...

Claims

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Application Information

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IPC IPC(8): H01M8/18C01G31/00
CPCC01G31/003H01M8/184Y02E60/50
Inventor 孙琦李岩孙慧英
Owner QINGDAO QIANYUN HIGH TECH NEW MATERIAL
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