Method for preparing vanadium battery solution or adjusting capacity and special device thereof

A vanadium battery and electrolysis device technology, which is applied to fuel cell components, secondary batteries, regenerative fuel cells, etc., can solve the problems of difficult to obtain vanadium compounds, reduce electrolysis efficiency, and necessary dissolution pools, etc., and achieve simple equipment and electrolysis High efficiency and quick response

Inactive Publication Date: 2010-01-06
DALIAN RONGKE ENERGY STORAGE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the anode reaction and cathode reaction occur in the same electrolytic cell at the same time, the low-valence vanadium compound generated on the surface of the cathode may be oxidized to a high-valence vanadium compound on the surface of the anode, which not only reduces the electrolysis efficiency , and it is difficult to obtain pure vanadium compounds
In addition, the above method needs to use multiple electrolyzers at the same time, and must dissolve the pool, filter equipment, etc., and the device is more complicated

Method used

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  • Method for preparing vanadium battery solution or adjusting capacity and special device thereof
  • Method for preparing vanadium battery solution or adjusting capacity and special device thereof
  • Method for preparing vanadium battery solution or adjusting capacity and special device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Using the electrolytic device of the present invention, the flow rate of the electrolyte in the electrolytic cell is 0.1 cms -1 , The temperature during electrolysis is 0℃, the pressure difference between the inlet and outlet of the electrolytic cell module is 0.01MPa, and the structure of the electrolytic cell is as follows:

[0066] Number of sections of electrolytic cell: 2 sections

[0067] Solution distribution: series

[0068] Circuit connection mode: series ( Figure 4 structure)

[0069] Anode: Stainless steel mesh

[0070] Cathode: carbon felt

[0071] Area: 100cm 2

[0072] Membrane: Anion exchange membrane

[0073] Frame: PVC

[0074] Gasket: Viton

[0075] Anode current collecting plate: graphite plate

[0076] Cathode collector plate: graphite plate

[0077] End plate: PVC

[0078] Concentration of vanadium solution: 1.35molL -1 , Of which pentavalent vanadium 1.33molL -1 , Tetravalent vanadium 0.2mo1L -1 , Take 15L vanadium solution into the cathode of the electrolytic cell...

Embodiment 2

[0080] Using the electrolytic device of the present invention, the flow rate of the electrolyte in the electrolytic cell is 5 cms -1 , The temperature of the electrolyte is about 50℃, the pressure difference between the inlet and outlet of the electrolytic cell module is 0.3MPa, and the structure of the electrolytic cell is as follows:

[0081] Number of sections of electrolytic cell: 12 sections

[0082] Solution distribution: series and parallel

[0083] Circuit connection mode: series ( Figure 5 structure)

[0084] Partition: PVC board

[0085] Anode: Nickel mesh

[0086] Cathode: carbon felt

[0087] Area: 2000cm 2

[0088] Membrane: Cation exchange membrane

[0089] Frame: PVC

[0090] Gasket: Viton

[0091] Anode current collecting plate: nickel plate

[0092] Cathode collector plate: graphite plate

[0093] End plate: Bakelite

[0094] Concentration of vanadium solution: 4.9molL -1 , Of which pentavalent vanadium 0.01molL -1 , Tetravalent vanadium 4.89molL -1 , Take 200L vanadium solutio...

Embodiment 3

[0096] Using the electrolytic cell of the present invention, the flow rate of the electrolyte in the cell is 2 cms -1 , The electrolyte temperature is 40℃, the pressure difference between the inlet and outlet of the electrolytic cell module is 0.1MPa, and the structure of the electrolytic cell is as follows:

[0097] Number of sections of electrolytic cell: 12 sections

[0098] Solution distribution: parallel

[0099] Circuit connection mode: parallel ( Image 6 structure)

[0100] Anode: Titanium mesh

[0101] Cathode: Titanium foam

[0102] Area: anode 300cm 2 , Cathode 500cm 2

[0103] Membrane: Anion exchange membrane

[0104] Frame: Teflon

[0105] Gasket: Viton

[0106] Anode current collecting plate: titanium plate

[0107] Cathode collector plate: titanium plate

[0108] End plate: Bakelite

[0109] Concentration of vanadium solution: 0.11molL -1 , Of which 0.1molL of pentavalent vanadium -1 , Tetravalent vanadium 0.01molL -1 , Take 20L vanadium solution into the cathode of the electrol...

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Abstract

The invention relates to a method for preparing vanadium battery solution or adjusting the capacity, wherein an adopted electrolysis unit comprises an electrolytic cell group, an anode electrolyte storage tank, a cathode electrolyte storage tank, a liquid conveying pipeline and a pump, a mode of forced convection is adopted so that the anode electrolyte and the cathode electrolyte stored in the anode electrolyte storage tank and the cathode electrolyte storage tank respectively flow through the anode and the cathode of the electrolytic cell group respectively, a voltage is applied between the anode and the cathode of the electrolytic cell group to generate direct current capable of generating oxygen and deoxidizing a vanadium compound, and after finishing electrochemical oxidation and reduction reaction, the anode electrolyte and the cathode electrolyte flowing through the anode and the cathode of the electrolytic cell group return to the anode electrolyte storage tank and the cathode electrolyte storage tank. The electrolysis method is applied to preparing electrolyte for a full vanadium liquid stream battery and restoring the capacity of the full vanadium liquid stream battery off line or on line.

Description

Technical field [0001] The present invention relates to the preparation of vanadium compound solution (VOSO 4 , V 2 (SO 4 ) 3 , VSO 4 Or a mixture of any two) electrolysis method and a special electrolysis device, the electrolysis method and the electrolysis device can be used to prepare the all-vanadium redox flow battery electrolyte solution and restore the capacity of the all-vanadium redox flow battery system. Background technique [0002] The all-vanadium flow battery is a new type of electric energy storage device. Its advantage is that the output power and energy storage capacity of the battery system are independent of each other, and the system design is flexible; the energy efficiency is high, up to 70-80%; the storage capacity is large and can be Up to 100 MWh; high reliability of the battery, capable of deep discharge of more than 90%; quick start-up; free system location without geographical restrictions; most of the battery components and materials can be recycled, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/00H01M8/02H01M8/18H01M10/36
CPCY02E60/12Y02E60/528Y02E60/10Y02E60/50
Inventor 陈剑张华民孙晨曦韩希高素军宋明明郝钥
Owner DALIAN RONGKE ENERGY STORAGE GRP CO LTD
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