Alkaline electrolyte membrane, and preparation method and application thereof

Abstract

The invention discloses an alkaline electrolyte membrane, and a preparation method and application thereof. According to the alkaline electrolyte membrane, an ionic liquid stable in chemical property and high in conductivity is synthesized through structural design and optimization of the ionic liquid, and then the stable state of the ionic liquid in the alkaline polymer electrolyte membrane is further improved through the anchoring effect of a corresponding MOF material; finally, the alkaline electrolyte membrane based on the ionic liquid, which has good chemical stability, relatively high conductivity, high temperature resistance and strong binding force, is obtained. The alkaline electrolyte membrane is composed of an organic polymer skeleton, an MOF material and the ionic liquid. The method solves the problem that the performance of the alkaline membrane is reduced in a high-temperature and low-humidity environment, and the alkaline electrolyte membrane can be applied to an alkaline polymer electrolyte membrane fuel cell or a water electrolysis cell taking the alkaline polymer membrane as a solid electrolyte.

Description

Technical field [0001] The invention belongs to the field of alkaline electrolyte membranes; the invention also relates to the preparation of an alkaline electrolyte membrane that has good chemical stability, high conductivity, and can be used at high temperatures (>90°C). Background technique [0002] Alkaline polymer electrolyte membrane fuel cells (APEMFCs) using alkaline polymer membranes as solid electrolytes have fast cathode reaction kinetics and can use non-noble metals as electrocatalysts, which can effectively avoid dendrite short circuit problems caused by salt deposition. and other advantages. Since it was first reported in 2005, it has become one of the research hotspots in the field of fuel cells. As one of the key materials for alkaline fuel cells, alkaline polymer electrolyte membranes have been extensively studied and have made great progress. Through molecular structure design, a continuous and obvious microscopic phase separation structure was constru...

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Problems solved by technology

[0003] Aiming at the performance degradation of alkaline membranes under high temperature and low humidity environment, the purpose of this invention is to design and prepare a class of alkaline electrolytes with good chemical stability and high conductivity, so that they can be used at >90°C or even higher temperatures; Characterize and test the physicochemical and electrochemical properties of such alkaline electrolytes

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