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A kind of electrode material for all-vanadium redox flow energy storage battery and its application

A technology for all-vanadium redox flow batteries and electrode materials, which is applied to battery electrodes, circuits, electrical components, etc., to achieve the effects of controllability, simple synthesis method, and high catalytic activity

Inactive Publication Date: 2015-08-19
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electrocatalytic activity of such materials has been further improved

Method used

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  • A kind of electrode material for all-vanadium redox flow energy storage battery and its application
  • A kind of electrode material for all-vanadium redox flow energy storage battery and its application
  • A kind of electrode material for all-vanadium redox flow energy storage battery and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Dissolve 200mg of analytically pure ammonium metatungstate in 10g of alcohol-water mixed solution. The volume ratio of alcohol and water is 1:2. After ultrasonic dissolution to obtain a clear solution, add 50mg of activated carbon powder. Ultrasound for 12 hours, and then 80°C water bath The solvent was evaporated to dryness. Put it in a vacuum drying oven at 100°C for 12 hours, and heat it according to the heating procedure. After cooling to room temperature, grind it in a mortar to get the finished product. Use an appropriate amount of 5wt% Nafion solution as a binder, spray it on Toray060 carbon paper with a spray gun, and control the electrocatalyst loading to 2.5mg / cm 2 .

[0052] The Toray060 carbon paper coated with carbon-supported tungsten trioxide electrocatalyst was used to assemble the all-vanadium flow energy storage battery. The current collector plate was a graphite plate, and a flow field was engraved on the graphite plate to provide channels for the fl...

Embodiment 2

[0056] Dissolve the cationic surfactant CTAB in deionized water, and ultrasonically dissolve it to obtain a 0.02mol / L CTAB aqueous solution. Measure 20ml of the solution, add an appropriate amount of ammonia solution to the solution, then add 20ml of ethanol, add 15g of graphite powder, and ultrasonicate for 30min , add 54 mg of analytical grade WCl under vigorous stirring 6 , reacted in a constant temperature water bath at 40°C for 4 hours, then centrifuged, washed, and vacuum-dried, and heat-treated according to the heating program, cooled to room temperature, and ground in a mortar. Use an appropriate amount of 5wt% Nafion solution as a binder, spray it on the SL carbon paper with a spray gun, and control the electrocatalyst loading to 2.5mg / cm2.

[0057] The prepared SGL carbon paper coated with carbon-supported tungsten trioxide electrocatalyst was used to assemble the all-vanadium flow energy storage battery. The current collector plate was a graphite plate, and a flow f...

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Abstract

The invention discloses an electrode material for an all vanadium redox energy storage battery and an application thereof. The electrode comprises carbon materials as matrix, and the electrode surface is dipped or coated with an electro-catalyst. The electro-catalyst has strong acid resistance and can keep stable in the strong-acidic strong-oxidizing environment of the all vanadium flow system. The prepared electrode material has high catalytic activity to two redox couples which are VO<2+> / VO2<+> and V<2+> / V<3+>, effectively improves the reversibility of the redox couples, effectively raises the energy conversion efficiency of the Vanadium Redox Battery (VRB), and realizes the controllability of the efficiency of the all vanadium redox energy storage battery.

Description

technical field [0001] The invention relates to an electrode material and an application thereof, in particular to an electrode material for an all-vanadium flow energy storage battery and an application thereof. Background technique [0002] Liquid flow energy storage battery is a new type of secondary battery. Unlike other ordinary batteries that store active substances inside the battery, it stores the electrolyte in a storage tank outside the battery, and realizes the circulation of electrolysis in the battery cavity through the fluid pump and delivery pipeline to complete the charging and discharging process of the battery . This type of battery has the advantages of flexible system design (power / capacity can be independently designed), large storage capacity, and freedom of site selection, and is suitable for large-scale energy storage. Compared with other energy storage technologies, it also has the characteristics of high energy conversion efficiency, deep discharg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/96H01M4/90
CPCY02E60/50
Inventor 张华民姚川王晓丽
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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