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Zinc-iron single flow battery

A technology of flow battery and single battery, applied in the field of single liquid flow battery, can solve the problems of low solubility of iron salt and cross-contamination of iron ions, etc.

Active Publication Date: 2014-03-26
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

[0006] This patent proposes the concept of a zinc-iron single flow battery by improving the positive electrode reaction, which improves the low solubility of iron salts and cross-contamination of iron ions in traditional zinc-iron flow batteries

Method used

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Embodiment Construction

[0020] Preparation of positive electrode active material:

[0021] Use a reagent bottle to prepare 40mL of 0.05mol / L FeSO 4 Slowly add dropwise to 100mL0.05mol / L KOH solution, stir well with a glass rod to obtain a colorless and clear mixed solution; nitrogen protection; reaction temperature: room temperature; after the reaction is completed, collect the black precipitate by suction filtration and wash repeatedly with deionized water Until the solution was neutral, the well was vacuum-dried in an oven at 100° C. for 12 hours to obtain the positive active material FeO.

[0022] Preparation of positive electrode:

[0023] The prepared positive electrode active material FeO was mixed with acetylene black and PTFE at a mass ratio of 75:15:10, and was thoroughly ground evenly with an agate mortar. Add an appropriate amount of ethanol, scrape evenly on 3x3cm with a blade 2 On the base foam nickel, put it into a vacuum drying oven at 120°C to dry to constant weight, press it into ...

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Abstract

The invention relates to a zinc-iron single flow battery comprising a battery module formed by a single battery or more than two single batteries connected in series, an electrolyte storing tank, a circulating pump and a circulating pipeline, wherein the single battery comprises positive and negative end plates, a positive electrode and a negative electrode; the electrolyte is an alkaline zincate solution; the positive electrode and the negative electrode adopt the same electrolyte; the positive reaction is the solid phase conversion of FeO and Fe2O3. The zinc-iron single flow battery disclosed by the invention is capable of overcoming the cross contamination problem of a traditional zinc-iron flow battery and has the characteristics of long cycle life, low cost and simple structure and simplicity in manufacturing process.

Description

technical field [0001] The invention relates to the field of a single-flow battery, in particular to a zinc-iron single-flow battery. Background technique [0002] Recently, with the increasing shortage of energy supply in the world, people have begun to pay attention to the development and utilization of renewable energy such as wind energy and solar energy. However, to ensure the stable power supply of renewable energy power generation systems such as solar energy and wind energy, it is necessary to combine Reliable energy storage technology cooperates with it. Looking at various energy storage technologies, the chemical energy storage method of liquid flow energy storage batteries has become one of the most suitable batteries for large-scale energy storage due to its unique advantages. [0003] At present, the well-developed flow battery systems mainly include all-vanadium flow batteries and zinc-bromine flow batteries. The all-vanadium redox flow battery realizes the re...

Claims

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Application Information

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IPC IPC(8): H01M8/18
CPCY02E60/528H01M8/188Y02E60/50
Inventor 张华民赖勤志程元徽
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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