A poly (para-terphenyl piperidine)/layered double hydroxide hybrid membrane with reduced ammonia permeability for direct ammonia fuel cell

Abstract

Abstract Anion exchange membrane fuel cells (AEMFCs) have attracted extensive attention in recent years due to their high electrode activity, potential non-noble metal catalyst application, and low requirement for fuel purity. Anion exchange membrane (AEM) is the core component of AEMFCs, which plays the role of conducting ions, blocking fuel mixing, and providing catalyst carriers. Its performance directly affects the efficiency and service life of the fuel cell. In most cases, the conductivity of AEM is generally low, and its durability is poor, which cannot meet the requirements of practical application temporarily. In this paper, from the point of view of material nanocomposite enhancement, the organic polymer and inorganic nanomaterials with high ionic conductivity are prepared using the suspension blending method, and the various properties of AEMs are tested. Compared with the bulk material, the ionic conductivity and ammonia inhibition performance are significantly improved, among which AEM doped with 4.8% LDH has the best performance, the ionic conductivity is increased by nearly an order of magnitude, and the ammonia permeation relative content is only 14.1% of the bulk material.