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Ionized sulfonated polyether-ether-ketone diaphragm as well as preparation method and application thereof

A sulfonated polyether ether ketone and ionization technology, which is applied in the field of ionized sulfonated polyether ether ketone membrane and its preparation, can solve the problems of battery energy efficiency reduction, etc., and achieve reduced surface resistance, improved ion exchange capacity, and excellent The effect of ion selectivity

Active Publication Date: 2022-02-25
寿光市联盟石油化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] According to the research of the inventors, in the flow battery made of ionized sulfonated polyetheretherketone diaphragm, at a lower current density (such as 20 mA·cm -2 ) has a high battery energy efficiency (about 85%), when the current density increases, the battery energy efficiency decreases significantly, for example, at 100 mA cm -2 Under the condition of high current density, the battery energy efficiency is only about 50%.

Method used

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  • Ionized sulfonated polyether-ether-ketone diaphragm as well as preparation method and application thereof
  • Ionized sulfonated polyether-ether-ketone diaphragm as well as preparation method and application thereof
  • Ionized sulfonated polyether-ether-ketone diaphragm as well as preparation method and application thereof

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preparation example Construction

[0040] The preferred preparation process of the present invention is as follows:

[0041] 1, preparation of sulfonated polyether ether ketones

[0042] (1) Add a quantity of 98 wt% of concentrated sulfuric acid to the reactor, stir the stir, and open the heated to the reaction temperature;

[0043] (2) A weight after drying polyether ether ketone powder is uniformly slowly added to a concentrated sulfuric acid reactor having a 98 wt% in the range of 10 to 80 min, and the reaction is stirred under constant temperature;

[0044] (3) The reaction product of step (2) is uniformly added to the washing vessel having deionized water in the range of 5 to 50 min, and the reaction product is washed to the pH to be neutralized with deionized water. Drying the dry sulfonated polyether ether ketone solid in the oven;

[0045] (4) The dry sulfonated polyether ether ketone obtained by step (3) and the high boiling organic solvent is added to the reactor in a ratio of 1 / 30 to 1 / 3, at 50 ° C ~ 100 °...

Embodiment approach

[0052] According to a third embodiment of the present invention, there is provided an application of the ionized sulfhyd polyether ether ketone compact membrane in a liquid flow battery.

[0053] The liquid flow cell of the present invention is an oxidative liquid flow battery, a particularly zinc iron flow battery, and a neutral iron sulfur flow battery.

[0054] According to a fourth embodiment of the present invention, a liquid flow battery is provided, and is formed from a positive electrode, an anode, an electrolyte, an ion exchange membrane, and the ion exchange membrane is the ionized sulfhyd polyether ether ketone diaphragm.

[0055] In order to enable those skilled in the art more apparent to the technical solutions of the present invention, the technical solutions of the present invention will be described in detail below.

Embodiment 1

[0057] 1. Preparation of sulfonated polyether ether ketogenesis

[0058] (1) 98 wt% of 12 l was added to the reactor, and stirred at 300 n / min, and the heating was opened to raise the temperature in the reactor to 63 ° C.

[0059] (2) The dried polyether ether ketone powder was uniformly added in 40 min in 40 min, and the concentrated rate of concentrated sulfate of 500 n / min continued to react at a constant temperature of 63 ° C. 2 h.

[0060] (3) Complement the reaction product of step (2) in a uniformly and slowly adding the washing vessel containing 7 ° C deionized water, and the water is rinsed with deionized water, and the reaction product is washed to the pH. Neutral, and drying the dried sulfonated polyether ether ketone solid was dried under the oven at 90 ° C.

[0061] (4) The mixed sulfonated polyether ether ketone obtained by step (3) and the dimethyl sulfoxide is added to the reactor in a ratio of 1: 6, and dissolved under a constant temperature conditions at 70 °...

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Abstract

The invention belongs to the technical field of advanced inorganic non-metallic materials, relates to preparation of a battery diaphragm, and particularly relates to an ionized sulfonated polyether-ether-ketone diaphragm as well as a preparation method and application thereof. The preparation method comprises the following steps of preparing a sulfonated polyether-ether-ketone membrane from a sulfonated polyether-ether-ketone solution, adding the sulfonated polyether-ether-ketone membrane into an alkali metal ion solution, and performing ionization treatment to obtain an ionized sulfonated polyether-ether-ketone membrane. The preparation process of the sulfonated polyether-ether-ketone membrane comprises the following steps of coating and forming a sulfonated polyether-ether-ketone solution on the surface of a substrate by using coating equipment, and then drying to obtain the sulfonated polyether-ether-ketone membrane. The ionized sulfonated polyether-ether-ketone diaphragm prepared by the invention also has lower swelling ratio and higher ion exchange capacity, so that the prepared ionized sulfonated polyether-ether-ketone diaphragm can increase the energy efficiency of the flow battery under the condition of higher current density.

Description

Technical field [0001] The present invention belongs to the technical field of advanced inorganic non-metallic materials, and is related to the preparation of a battery diaphragm, and more particularly to an ionized sulfurized polyether ether ketogenesis and preparation method thereof. Background technique [0002] The information disclosed in the background is disclosed only to increase the understanding of the overall background of the present invention, and is not necessarily considered to admit or imply that the information is intended to be a prior art known to those skilled in the art. [0003] According to the inventors, in the liquid flow cell made of ionized sulfubinized polyether ether ketogenesis, in a lower current density (for example 20 mA · cm -2 Under the lower battery energy efficiency (about 85%), when the current density is increased, the energy efficiency of the battery is significantly reduced, for example at 100 mA · cm. -2 Under current density conditions, ...

Claims

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Application Information

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IPC IPC(8): C08J5/22C08L61/16H01M8/0221H01M8/18
CPCC08J5/2256C08J5/2287H01M8/188H01M8/0221C08J2361/16Y02E60/50
Inventor 苗志强常成明鞠晓强姜亦雷刘志臣朱效洋林青
Owner 寿光市联盟石油化工有限公司
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