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Preparation method of alkaline redox flow battery system 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 low energy density and high cost of flow batteries, and achieve excellent reversibility, suitable potential, and low cost.

Active Publication Date: 2019-12-03
北京德泰储能科技有限公司
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  • 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, low-cost alkaline flow battery system preparation method to solve the problem of the existing flow battery energy density low cost, high cost

Method used

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  • Preparation method of alkaline redox flow battery system with high energy density and low cost
  • Preparation method of alkaline redox flow battery system with high energy density and low cost
  • Preparation method of alkaline redox flow battery system with high energy density and low cost

Examples

Experimental program
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Effect test

Embodiment 1

[0041] In this example, the preparation method of the alkaline flow battery system is as follows:

[0042] 1. The ionization treatment process of Nafion membrane (the present embodiment adopts Nafion212), comprises the following steps:

[0043] (1) A Nafion membrane with a length of 7.5 cm and a width of 5.5 cm was placed in a molar concentration of 1M H 2 o 2 In aqueous solution, wash at 80°C for 1 hour at a constant temperature;

[0044] (2) Place the treated Nafion membrane in deionized water, and treat it at a constant temperature of 60° C. for 40 minutes to obtain a clean Nafion membrane;

[0045](3) Place the above-mentioned clean Nafion membrane in an aqueous solution of hydrochloric acid with a molar concentration of 1M and protonate it at a constant temperature of 80°C for 1h;

[0046] (4) Place the protonated Nafion membrane in deionized water, and treat it at a constant temperature of 60°C for 40 minutes to obtain a clean Nafion membrane;

[0047] (5) Place the ...

Embodiment 2

[0058] The difference from Example 1 is that the preparation of the electrolyte:

[0059] (1) Dissolve sodium permanganate in an aqueous sodium hydroxide solution with a molar concentration of 1.5M. After completely dissolving, obtain an alkaline aqueous solution of sodium permanganate with a molar concentration of 1M, seal it in a positive electrode liquid storage tank, and use it as a battery positive electrolyte.

[0060] (2) Sodium hydroxide is dissolved in deionized water. After being completely dissolved, an aqueous sodium hydroxide solution with a molar concentration of 1.5M is obtained. After being completely dissolved, it is sealed in a negative electrode liquid storage tank and used as the negative electrode electrolyte of the battery.

[0061] In this embodiment, carbon felt is used as the positive electrode material of the flow battery, zinc sheet is used as the negative electrode material of the flow battery, and a flow battery of the sodium permanganate-zinc plat...

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Abstract

The invention relates to the field of alkaline redox flow battery energy storage, in particular to a preparation method of an alkaline redox flow battery system with high energy density and low cost,and aims to solve the problems of low energy density, high cost and the like of an existing all-vanadium redox flow battery. Carbon felt is used as a positive electrode material of a flow battery, anda zinc sheet or a zinc plate is used as a negative electrode material of the flow battery. An alkaline aqueous solution of permanganate (such as KMnO4, NaMnO4 and the like) is used as a positive electrode electrolyte; an alkaline aqueous solution of strong base (such as KOH, NaOH and the like) is used as a negative electrolyte, and a perfluorosulfonic acid proton exchange membrane (such as Nafion117, Nafion212 and the like) subjected to ionization treatment is used as an ion exchange membrane of the flow battery to assemble the battery. Thus, an alkaline redox flow battery system having low cost and high energy density is obtained. The redox flow battery system researched and developed by the invention has the advantages of the high energy density, the low cost, the long cycle life and the like, and can be widely applied to the field of redox 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 high energy density, low-cost alkaline flow battery system. Background technique: [0002] The non-renewability of fossil energy and the increasing demand for energy make human beings urgently need a new energy storage technology to stably store new energy, such as: wind energy, solar energy, etc. Flow batteries are one of the most promising candidates for energy storage due to their flexible structure, long cycle life, safety and reliability. Among various traditional flow battery systems, the all-vanadium flow battery can effectively avoid the problem of ion cross-contamination, but its relatively low energy density (25Wh / L) and high cost make its commercialization process a huge obstacle. . Although the non-aqueous system has a high open-circuit voltage and abundant alternative active materials, the low solubility and solut...

Claims

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Application Information

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IPC IPC(8): H01M8/18H01M8/1016H01M4/90
CPCH01M8/188H01M8/1016H01M4/9041H01M4/90Y02E60/50
Inventor 丁美韩杰贾传坤
Owner 北京德泰储能科技有限公司
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