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Anode material for zinc-bromine flow battery and preparation and application thereof

A zinc-bromine flow battery and positive electrode technology, applied in battery electrodes, regenerative fuel cells, circuits, etc., can solve problems such as poor effect

Active Publication Date: 2019-05-21
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] As the main body of the battery, the positive electrode material currently mainly uses carbon materials as the catalytic material of the positive bromine element, and the effect is poor.

Method used

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  • Anode material for zinc-bromine flow battery and preparation and application thereof
  • Anode material for zinc-bromine flow battery and preparation and application thereof
  • Anode material for zinc-bromine flow battery and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Place 2 g of titanium dimethyl dithiocarbamate under nitrogen, and heat up from room temperature to a sintering temperature of 500 degrees Celsius at a rate of 1 degrees Celsius / minute. After sintering at 500°C for 1 hour, the carbon-coated metal titanium sulfide was obtained. The material is granular and agglomerated see figure 1 , where the white particles are uncoated titanium sulfide. The prepared carbon-coated titanium disulfide material and the binder nafion were coated on a 36cm 2 On carbon felt (5mm thickness), the load is 2mg / cm 2 , as the positive electrode;

[0031] Negative pole adopts 36cm 2 Carbon felt (5mm thickness), with nafion membrane as the diaphragm in the middle. The positive and negative electrolytes are both 2mol / L zinc bromide solution 60ml. Through the circulation pipeline, it circulates between the liquid storage tank and the positive and negative electrodes of the battery. The battery uses 40mA / cm 2 , current density charge and discha...

Embodiment 2

[0036] Place 2 g of titanium diethyldithiocarbamate under nitrogen and raise the temperature from room temperature to a sintering temperature of 700 degrees Celsius at a heating rate of 10 degrees Celsius / minute. After sintering at 700°C for 2 hours, the carbon-coated metal titanium sulfide was obtained. The material is agglomerated in granular form, see Figure 4 .

Embodiment 3

[0038] 2 g of titanium diethyldithiocarbamate was placed under nitrogen and heated from room temperature to a sintering temperature of 1000 degrees Celsius at a heating rate of 5 degrees Celsius / minute. After sintering at 1000°C for 4 hours, it was taken out to obtain carbon-coated metal titanium sulfide. The material is granular and agglomerated see Figure 5 , it can be clearly seen from the figure that the bright white is titanium sulfide, and titanium sulfide is embedded in the carbon skeleton.

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Abstract

The invention relates to an anode for a zinc-bromine flow battery, and the anode takes a conductive current collector as a matrix, wherein a catalytic material is supported on the matrix, the catalytic material is carbon-coated metal titanium disulfide, and the conductive current collector is foamed nickel or carbon felt. Starting from the electrode, the electrode in the flow battery provides a reaction place for an electrochemical reaction; for example, the generated elemental bromine can be completely reacted in the discharging process, so that the concentration of bromine in the electrolytesolution in the subsequent circulation process is greatly reduced, and the permeation pollution of the elemental bromine is reduced.

Description

technical field [0001] The invention relates to the technical field of electrodes for zinc-bromine flow batteries, in particular to positive electrode materials and preparation techniques for zinc-bromine flow batteries. Background technique [0002] Zinc-bromine flow batteries have the advantages of high energy density and low cost compared with all-vanadium flow batteries. The theoretical open circuit voltage of the zinc-bromine flow energy storage battery is about 1.80V, and the theoretical energy density is 430Wh / kg. The positive and negative electrodes of the zinc-bromine flow battery are separated by a separator, and the electrolyte solution on both sides is ZnBr 2 solution. Under the action of the power pump, the electrolyte solution circulates in the closed circuit formed by the liquid storage tank and the battery. The potential difference between the positive and negative electrode pairs is the driving force for the reaction, and the electrode reaction of the zin...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/90H01M4/88H01M8/18
CPCY02E60/50
Inventor 赖勤志李先锋张华民许鹏程宋杨
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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