High-Temperature Polymer Electrolyte Fuel Cells Based on Protic Ionic Liquids

IF 2.6 4区 工程技术 Q3 ELECTROCHEMISTRY
Fuel Cells Pub Date : 2024-08-08 DOI:10.1002/fuce.202300213
Christian Rodenbücher, Carsten Korte, Yingzhen Chen, Klaus Wippermann, Piotr M. Kowalski, Sangwon Kim, Jungtae Kim, Rolf Hempelmann, BeomJun Kim
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Abstract

A hydrogen-based energy system will be the backbone of a future energy grid using renewable energies. It is widely accepted that polymer electrolyte membrane fuel cells (PEMFCs) are promising converters of chemical energy stored as hydrogen into electrical energy. An increase of the operation temperature from below 80°C to above about 160°C is considered beneficial, as it would allow for much simpler water management and the use of waste heat. Here, we are investigating protic ionic liquids (PILs) immobilized in a polybenzimidazole polymer as electrolytes for high-temperature PEMFCs. Ionic liquids are promising for fuel cell applications as they provide high thermal and chemical stability and high proton conductivity. In contrast to aqueous electrolytes, ionic liquids form a dense layered structure at the electrode–electrolyte interface that depends on the potential and on the content of residual water in the electrolyte. We investigate how PILs interact with the host polymer of the membrane revealing that porous polymer structures can be formed by solution casting, which allows for an encapsulation of the ionic liquid within the pores. After doping the polymer with small amounts of phosphoric acid, the membranes showed reasonable conductivity and fuel cell performance.

Abstract Image

基于原生离子液体的高温聚合物电解质燃料电池
以氢为基础的能源系统将成为未来使用可再生能源的能源网的支柱。人们普遍认为,聚合物电解质膜燃料电池(PEMFCs)是很有前途的将储存为氢的化学能转化为电能的转换器。将工作温度从 80°C 以下提高到 160°C 以上被认为是有益的,因为这样可以大大简化水管理和余热利用。在此,我们正在研究将固定在聚苯并咪唑聚合物中的原生离子液体(PIL)作为高温 PEMFC 的电解质。离子液体具有较高的热稳定性、化学稳定性和质子传导性,因此在燃料电池应用中大有可为。与水性电解质不同的是,离子液体会在电极-电解质界面形成致密的层状结构,这种结构取决于电势和电解质中残留水的含量。我们研究了 PIL 如何与膜的主聚合物相互作用,发现多孔聚合物结构可通过溶液浇铸形成,从而将离子液体封装在孔隙中。在聚合物中掺入少量磷酸后,膜显示出合理的导电性和燃料电池性能。
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来源期刊
Fuel Cells
Fuel Cells 工程技术-电化学
CiteScore
5.80
自引率
3.60%
发文量
31
审稿时长
3.7 months
期刊介绍: This journal is only available online from 2011 onwards. Fuel Cells — From Fundamentals to Systems publishes on all aspects of fuel cells, ranging from their molecular basis to their applications in systems such as power plants, road vehicles and power sources in portables. Fuel Cells is a platform for scientific exchange in a diverse interdisciplinary field. All related work in -chemistry- materials science- physics- chemical engineering- electrical engineering- mechanical engineering- is included. Fuel Cells—From Fundamentals to Systems has an International Editorial Board and Editorial Advisory Board, with each Editor being a renowned expert representing a key discipline in the field from either a distinguished academic institution or one of the globally leading companies. Fuel Cells—From Fundamentals to Systems is designed to meet the needs of scientists and engineers who are actively working in the field. Until now, information on materials, stack technology and system approaches has been dispersed over a number of traditional scientific journals dedicated to classical disciplines such as electrochemistry, materials science or power technology. Fuel Cells—From Fundamentals to Systems concentrates on the publication of peer-reviewed original research papers and reviews.
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