Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of zinc-iron flow battery with high energy density and low cost

A high-energy-density, low-cost technology, applied in fuel cells, battery electrodes, regenerative fuel cells, etc., can solve the problems of high cost and low energy density, and achieve low cost, high energy density, and low raw material prices

Active Publication Date: 2020-06-05
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the existing technology and break through the shackles of the traditional flow battery system, the purpose of the present invention is to provide a high energy density and low-cost zinc-iron flow battery preparation method to solve the problem of the low energy density of the existing flow battery , high cost issues

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of zinc-iron flow battery with high energy density and low cost
  • Preparation method of zinc-iron flow battery with high energy density and low cost
  • Preparation method of zinc-iron flow battery with high energy density and low cost

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In this example, the preparation method of the ion exchange membrane for the alkaline redox flow battery is as follows:

[0037] 1. The ionization treatment process of Nafion membrane / SPEEK membrane includes the following steps:

[0038] (1) Soak the Nafion membrane or SPEEK membrane with a length of 7.5cm and a width of 5.0cm in deionized water and wash it repeatedly;

[0039] (2) Nafion film or SPEEK film after cleaning is placed in the sodium hydroxide or potassium hydroxide or lithium hydroxide aqueous solution (the present embodiment is the sodium hydroxide aqueous solution that molar concentration is 1M) of 0.1~10M molar concentration, Ionize at a constant temperature of 60-100°C for 1-3 hours (in this example, ionize at a constant temperature of 80°C for 2 hours);

[0040] (3) After the ionized Nafion membrane or SPEEK membrane is cooled to room temperature, it is repeatedly washed with deionized water to neutrality, soaked in deionized water, and set aside;

...

Embodiment 2

[0050] The difference from Example 1 is that the preparation of the electrolyte:

[0051] Dissolve ferrocyanide (such as potassium ferrocyanide) in sodium hydroxide or potassium hydroxide or lithium hydroxide aqueous solution with a molar concentration of 0.1-2M (this example is an aqueous lithium hydroxide solution with a molar concentration of 1.5M) After being completely dissolved, an alkaline aqueous solution of ferrocyanide with a molar concentration of 0.9M is obtained, and a certain amount is placed in the positive electrode liquid storage tank to be used as the positive electrode electrolyte of the battery.

[0052] In this embodiment, the carbon felt is used as the positive electrode material of the flow battery, the zinc plate is used as the negative electrode material of the flow battery, and the ionized cation exchange membrane is used to assemble the flow battery of the system. The zinc-iron system flow battery assembled with the alkaline aqueous solution of ferro...

Embodiment 3

[0058] In this example, the preparation method of the ion exchange membrane for the alkaline redox flow battery is as follows:

[0059] 1. The ionization treatment process of PBI membrane comprises the following steps:

[0060] (1) Soak the PBI membrane with a length of 7.5cm and a width of 5.0cm in deionized water and wash it repeatedly;

[0061] (2) Place the cleaned PBI membrane in an aqueous potassium hydroxide solution with a molar concentration of 2M, and ionize it at a constant temperature of 90° C. for 1 h;

[0062] (3) After the ionized PBI film is cooled to room temperature, it is washed repeatedly with deionized water to neutrality, soaked in deionized water, and set aside;

[0063] 2. Preparation of electrode materials:

[0064] (1) Polish a zinc plate with a thickness of 4mm on 120-mesh sandpaper, clean it with deionized water and dry it with a hair dryer, and use it as the negative electrode material of the battery.

[0065] (2) Carbon felt and graphite felt w...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
current efficiencyaaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of alkaline redox flow battery energy storage, in particular to a preparation method of a zinc-iron flow battery with high energy density and low cost, which can beused for solving the problem of low energy density in an all-vanadium flow battery system at the present stage and can reduce the cost of the flow battery. An alkaline aqueous solution of ferrocyanideor ferricyanide is used as a positive electrode electrolyte, and an alkaline solution of zinc salt is used as a negative electrode electrolyte, the graphite felt and carbon felt are selected as the positive electrode materials, a zinc plate is selected as a negative electrode material, and an ionized cation exchange membrane is used as a diaphragm to assemble the battery, so that the alkaline zinc-iron redox flow battery system with high energy density and low cost is obtained. The flow battery system has the advantages of high energy density, high coulombic efficiency, low cost, good cyclingstability and the like, and can be widely applied to the field of flow battery energy storage.

Description

Technical field: [0001] The invention relates to the field of alkaline redox flow battery energy storage, in particular to a preparation method of a zinc-iron flow battery with high energy density and low cost. Background technique: [0002] Due to the discontinuity and discontinuity of traditional fossil energy sources such as coal, oil, and natural gas, they cannot support the sustainable development of human beings, and some difficult-to-handle pollution problems will inevitably arise during their use. Therefore, the development and utilization of clean energy (such as: solar energy, wind energy, etc.) is an inevitable trend of future energy development, but these energy sources are affected by natural factors, have discontinuous, unstable and uncontrollable unsteady characteristics, and cannot be sustainable Effectively integrated into the grid. To solve this problem, an economical, efficient, and stable large-scale energy storage technology must be developed to meet th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/96H01M8/083H01M8/18
CPCH01M8/188H01M8/083H01M4/96H01M4/9041Y02E60/50
Inventor 丁美王桂香贾传坤
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com