Application of an ion-conducting membrane containing chlorinated polyvinyl chloride in a flow battery

A technology of chlorinated polyvinyl chloride and ion-conducting membranes, applied in fuel cells, regenerative fuel cells, aqueous electrolyte fuel cells, etc., can solve the problems of membrane stability degradation and achieve increased solubility and molecular bond polarity , high efficiency effect

Active Publication Date: 2022-03-08
中科化物(大连)科技实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of the decrease of membrane stability caused by the introduction of ion exchange groups in the non-fluorine ion exchange membrane, the present invention develops a membrane with high ion conductivity, high vanadium resistance and chemical stability. ion-conducting membrane

Method used

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  • Application of an ion-conducting membrane containing chlorinated polyvinyl chloride in a flow battery
  • Application of an ion-conducting membrane containing chlorinated polyvinyl chloride in a flow battery
  • Application of an ion-conducting membrane containing chlorinated polyvinyl chloride in a flow battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1 (preferred)

[0040] Dissolve CPVC (degree of chlorination 72%) and polyvinylpyrrolidone (PVP, degree of quaternization 100%) in an organic solvent, stir fully at 25°C for 48 hours to make a blend solution; wherein the mass concentration of CPVC is 10 %, the mass concentration of PVP is 15%; then pour the prepared CPVC / PVP blend solution directly on a glass plate, and evaporate the solvent at 25°C; finally, immerse the glass plate in water at a temperature of 25°C for 1h , to prepare the CPVC ion-conducting membrane applied in the flow battery, CPVC The thickness of the ion-conducting membrane is 40 μm.

[0041] will be made CPVC The performance of the ion-conducting membrane was tested and compared with the performance of the commercialized perfluorosulfonic acid membrane Nafion 115 membrane. The present invention takes an all-vanadium redox flow battery as an example. Prepared CPVC As shown in Table 1, the surface resistance of the ion-conducting m...

Embodiment 2

[0044] Configure the film-forming solution according to the method described in the above-mentioned Example 1, the difference is that the mass concentration of PVP is 5%, and the prepared CPVC The thickness of the ion-conducting membrane is 40 μm.

[0045] will be made CPVC The performance of the ion-conducting membrane was tested, and compared with the performance of the CPVC ion-conducting membrane prepared in Example 1 and the Nafion 115 membrane. The present invention takes an all-vanadium redox flow battery as an example. Prepared in this example CPVC The surface resistance of the ion-conducting membrane is lower than the surface resistance of the Nafion 115 membrane, but higher than the surface resistance of the CPVC ion-conducting membrane prepared in Example 1, indicating that the decline of the ion-exchange resin content in the CPVC ion-conducting membrane reduces the ion conduction of the membrane rate (table 1); prepared in the present embodiment CPVC Vanadiu...

Embodiment 3

[0048] Configure the film-forming solution according to the method described in the above-mentioned Example 1, the difference is that the mass concentration of PVP is 25%, and the prepared CPVC The thickness of the ion-conducting membrane is 40 μm.

[0049] will be made CPVC The performance of the ion-conducting membrane was tested, and compared with the performance of the CPVC ion-conducting membrane prepared in Example 1 and the Nafion 115 membrane. The present invention takes an all-vanadium redox flow battery as an example. Prepared in this example CPVC The surface resistance of the ion-conducting membrane is lower than the surface resistance of the CPVC ion-conducting membrane prepared in Example 1 and the Nafion 115 membrane, showing that the increase of the ion-exchange resin content in the CPVC ion-conducting membrane has improved the ion conductivity of the membrane (Table 1) ; Prepared in this embodiment CPVC Vanadium ions (VO 2+ ) transmittance is higher tha...

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Abstract

The invention relates to the application of an ion conduction membrane containing chlorinated polyvinyl chloride in a liquid flow battery. The ion-conducting membrane is prepared by blending chlorinated polyvinyl chloride and ion-exchange resin and solidifying by solvent evaporation. The introduction of chlorinated polyvinyl chloride significantly improves the problem of the decrease of membrane stability caused by the introduction of ion-exchange groups in non-fluorine ion-conducting membranes. The blended membrane has both high ion conductivity and high resistance to vanadium. capacity and chemical stability of ion-conducting membranes.

Description

technical field [0001] The invention relates to a diaphragm for a flow battery, in particular to the application of an ion-conducting membrane containing chlorinated polyvinyl chloride in a flow battery. Background technique [0002] In recent years, the use of renewable and clean energy has become more and more popular. However, the power generation of renewable energy such as wind energy and solar energy is affected by seasons, weather and geographical conditions, and has obvious discontinuity and instability. The generated electric power fluctuates greatly, and the adjustability is poor. In turn, it may have a greater impact on the power grid. Therefore, with the rapid rise of renewable energy such as wind energy and solar energy and the smart grid industry, energy storage technology has become the focus of much attention. Large-scale energy storage technology is considered as a strategic technology to support the popularization of renewable energy, and has received gre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/0221H01M8/0226H01M8/08H01M8/18
CPCH01M8/0226H01M8/0221H01M8/188H01M8/08H01M2300/0011Y02E60/50
Inventor 鲁文静李先锋张华民
Owner 中科化物(大连)科技实业有限公司
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