Zinc-oxygen single liquid flow cell

A flow battery, zinc-oxygen single technology, used in electric power, energy chemical industry, electronics industry, transportation, mining and metallurgy fields, can solve the problems of dendrite growth, unstable thermodynamic properties, easy deformation of electrodes, etc. The effect of energy density and power density, high energy utilization efficiency, and simple manufacturing process

Inactive Publication Date: 2010-07-21
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The direct rechargeable zinc-air battery is to directly charge the zinc electrode of the zinc-air battery. The main problems in this process are: 1. The electrochemical activity of zinc in alkaline solution is very large, and the thermodynamic properties are unstable at the same time, and the charging products The solubility of zincate in strong alkaline solution is high, so the electrode is prone to deformation, dendrite growth, self-corrosion and passivation, which leads to the gradual failur

Method used

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  • Zinc-oxygen single liquid flow cell
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  • Zinc-oxygen single liquid flow cell

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0036] Example 1

[0037] Positive electrode preparation

[0038] Nickel hydroxide and cobalt hydroxide were thoroughly mixed in a mass ratio of 95:5 and used as an oxygen precipitation catalyst. Nickel carbonyl powder was used as a conductive agent, and a 60% (wt) polytetrafluoroethylene (PTFE) emulsion was used as a binder. The mass ratio is 85:10:5. The volume ratio is 1:1 propanol and water to make a slurry, and the wet squeegee method is used to uniformly scrape to a 2.5mm thick commercially available nickel foam (Hunan Kaiyuan Technology On the side of the company), an oxygen evolution catalyst layer is formed. NiCo electrodeposited with 3% (wt) Ag black powder 2 O 4 The powder is the oxygen reduction catalyst, the carbonyl nickel powder is the conductive agent, and the 60% (wt) PTFE emulsion is the binder. The mixture is mixed in a ratio of 70:15:15 according to the mass ratio, and the volume ratio is 1:1 with acetone and water. It is formed into a slurry, and it is unifor...

Example Embodiment

[0045] Example 2

[0046] Positive electrode preparation

[0047] The ternary composite hydroxide Ni of nickel, aluminum and cobalt 0.82 Al 0.15 Co 0.03 (OH) 2 (Atomic ratio) is the oxygen evolution catalyst, expanded graphite is the conductive agent, 60% (wt) polytetrafluoroethylene (PTFE) emulsion is the binder, mixed in a mass ratio of 60:25:10, and the volume concentration is 15ml 95% ethanol and 2ml of water were mixed into a slurry, and then dried in a vacuum at 80°C, and then repeatedly rolled into a 100μm oxygen evolution catalytic film with a pair-roll tablet press. To contain 5% (wt) NaBiO 3 The electrolytic manganese dioxide powder is an oxygen reduction catalyst, expanded graphite and acetylene black are conductive agents, and 60% (wt) PTFE emulsion is a binder. The above four substances are mixed at a mass ratio of 60:20:5:15. The slurry was mixed with acetone and water in a volume ratio of 1:1, and then dispersed by ultrasonic for 30 minutes. After the mixture was va...

Example Embodiment

[0054] Example 3

[0055] Positive electrode preparation

[0056] First Ag 2 O, Co(OH) 2 , Ni(OH) 2 After being fully mixed in a ratio of 10:5:85 by mass percentage, it is used as an oxygen precipitation catalyst, carbon powder is a conductive agent, and 60% (wt) polyvinylidene fluoride emulsion is a binder. The above three substances are mixed in a mass ratio of 80:15:5, and 25ml of a mixed solvent of acetone and water with a volume ratio of 1:1 is used to prepare a slurry, and the wet squeegee method is used to uniformly scrape to a thickness of 1.1mm. On one side of the electrolytic nickel mesh with a pore size of 0.6 mm, an oxygen evolution catalyst layer is formed. Will electrolyze MnO 2 , Ag 2 O and NaBiO 3 The black powder mixed uniformly according to the mass ratio of 5:4:1 is the oxygen reduction catalyst, graphite powder is the conductive agent, 60% (wt) PTFE emulsion is the binder, and the mass ratio is 65:20:15. Use 20ml of a 1:1 mixed solvent of acetone and water to ...

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Abstract

The invention relates to a zinc-oxygen single liquid flow cell. Semi-shield type difunctional layer composite oxygen electrodes of two catalytic layer structures with the functions of catalyzing oxygen to reduce and separate are used as anode, wherein one layer for catalyzing the oxygen to reduce faces to the air and one layer for catalyzing the oxygen to separate faces to electrolyte. An inert electrode for deposing zinc is used as cathode; alkali solution containing zincate is used as electrolyte; a cell carries out the charge and discharge work under the circulation of a pump, so that the storage and power generation of electricity energy can be realized on a large scale.

Description

Technical field: [0001] The invention relates to a zinc-oxygen single-fluid flow battery, which belongs to the field of energy and chemical industry and can be widely used in the fields of electronics industry, transportation, electric power, mining and metallurgy, and the like. Background technique: [0002] Electric energy is an important guarantee for the development of the national economy. With the large-scale development and utilization of renewable energy such as nuclear power, wind energy, solar energy, and tidal energy, it is of great significance to develop efficient large-scale energy storage technologies in order to achieve stable power supply. Among the currently practical large-scale energy storage technologies, pumped water storage is the first to be used. It has a large scale and long life, but the geographical conditions are harsh and the construction cost is high. Among the chemical storage batteries, the flow battery (Flow cell, Flow battery), which is cu...

Claims

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Application Information

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IPC IPC(8): H01M12/06H01M12/02H01M4/02
CPCY02E60/128Y02E60/10
Inventor 潘军青籍利忠程杰孙艳芝文越华万平玉杨裕生
Owner BEIJING UNIV OF CHEM TECH
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