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Rechargeable metal-air redox flow battery combining electrochemical preparation

A metal-air and liquid flow battery technology, which is applied in the fields of power engineering and electrochemical energy storage, can solve the problems of cross-contamination between cathode and anode, serious side reactions, and waste of electric energy, and achieve low energy consumption, high energy density and power density , good application prospects

Inactive Publication Date: 2010-05-26
NO 63971 TROOPS PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, the usual electrosynthesis generally only obtains products on one electrode, and the electricity on the auxiliary electrode is consumed in the form of side reactions, resulting in a great waste of electrical energy
Although there is a specific reaction that can simultaneously synthesize two products at the positive and negative electrodes, there are still various problems such as high tank pressure, serious side reactions, and cross-contamination between the cathode and the anode.

Method used

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  • Rechargeable metal-air redox flow battery combining electrochemical preparation
  • Rechargeable metal-air redox flow battery combining electrochemical preparation
  • Rechargeable metal-air redox flow battery combining electrochemical preparation

Examples

Experimental program
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Effect test

Embodiment 1

[0023] The base material of the negative electrode is Ni sheet (as current collector and negative base), the positive electrode is sintered nickel oxide electrode, and the positive / negative electrode is separated by Nafion115 cation exchange membrane to assemble the battery. The positive electrode electrolyte is an aqueous solution of 35mL of 0.1M n-propanol+7MKOH, wherein n-propanol is a reducing raw material, water is a solvent, potassium hydroxide is a supporting electrolyte, and the negative electrode electrolyte is an aqueous solution of 35mL of 0.4MZnO+7MKOH, wherein Zinc ions are depositable metal ions, water is the solvent, potassium hydroxide is the supporting electrolyte, the anode electrolyte and the anode electrolyte are stored in external glass containers respectively, and each is fed into the positive and negative electrode areas of the battery by a magnetic circulation pump . When charging, the zinc reduction deposition reaction occurs at the negative electrode ...

Embodiment 2

[0025] Copper foil is used as the negative electrode (as current collector and negative electrode matrix), ZnO-saturated 6M KOH aqueous solution is the negative electrode electrolyte, in which zinc ions are depositable metal ions, water is the solvent, potassium hydroxide is the supporting electrolyte, Asahi Kasei F4602 type cation exchange The membrane is a diaphragm, with a bifunctional oxygen electrode as the positive electrode (which can not only catalyze the reduction of oxygen, but also produce oxygen electrochemically), and use 1.7M Na 2 CO 3 The aqueous solution is the positive electrode electrolyte, where Na 2 CO 3 It is a supporting electrolyte, and water is both a solvent and a reducing raw material (the positive reaction is to electrolyze water to generate protons). Negative electrode area, at 20mA / cm 2 The current density is charged and electrolyzed, electrolyzed for 12 hours, and NaHCO is obtained in the positive electrode area 3 solution, deposit metal zinc ...

Embodiment 3

[0027] Both positive and negative electrodes use graphite plates as current collectors and porous graphite felt as electrode materials. The positive and negative electrodes are separated by Nafion115 cation exchange membranes and assembled into batteries. The positive electrode electrolyte is 35mL of 0.1M cystine + 3M HBr aqueous solution, in which cystine is the reducing raw material, water is the solvent, HBr is the supporting electrolyte and oxidation medium (this electrode reaction is indirect electrochemical oxidation, that is, HBr electrooxidation into Br 2 , Br 2 Oxidation of cystine to L-sulfoalanine, Br 2 Regenerate HBr), negative electrode electrolyte is 35mL of 0.5M CdSO 4 +3MH 2 SO 4 aqueous solution, where Cd 2+ are metal ions that can be deposited electrochemically, water is the solvent, and H 2 SO 4 In order to support the electrolyte, the positive electrode electrolyte and the negative electrode electrolyte are stored in the external glass container resp...

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Abstract

The invention relates to a rechargeable metal-air redox flow battery compatible with electrochemical preparation. When the battery is charged, electric energy input makes metal ions in the electrolyte flowing through a negative electrode reduced and deposited into metal to prepare for discharge, and the electric energy also makes reductive raw materials in the electrolyte flowing through a positive electrode oxidized into a product required to be synthesized. When the battery is discharged, the positive electrode is introduced with air or oxygen, the air or the oxygen is reduced on the electrode, and the positive electrode and a deposition redox flow metal negative electrode form the metal-air redox flow battery to output electric energy. In each charge and discharge cycle, the accumulation and discharge of the metal-air redox flow battery are carried out, and simultaneously electrooxidation chemical production is carried out so as to achieve the effect that one portion of electric energy is consumed and two functions are realized. The redox flow battery combines two functions of rechargeable metal-air accumulation and electrochemical preparation, realizes the combination of electrosynthesis, a deposition redox flow battery and a rechargeable metal-air battery, achieves the effects of energy conservation and high efficiency, improves the utilization rate of the electric energy and has good application prospect.

Description

technical field [0001] The invention relates to a rechargeable metal-air liquid flow accumulator with electrochemical preparation, which belongs to the fields of electric power engineering and electrochemical energy storage. It can be widely used in fields such as electric energy storage, power grid peak regulation, and electrochemical synthesis. Background technique [0002] At present, my country's energy supply is becoming increasingly tense, especially the situation of power supply is not optimistic. The main reason for the shortage of electricity consumption is the rapid economic growth, and the industry has the most growth. Among the existing industries in our country, high-energy-consuming industries such as electrolytic aluminum, chlor-alkali, steel, and electromechanical synthesis have become major primary energy consumers and major pollutant emitters. Energy crisis and environmental pollution have become two major problems facing our country's further sustainable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M12/06
CPCY02E60/128Y02E60/10
Inventor 文越华潘军青程杰孙艳之曹高萍万平玉杨裕生王子镐
Owner NO 63971 TROOPS PLA
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