壳聚糖制碱性燃料电池阴离子交换膜的研究

Research on Chitosan Anion Exchange Membrane for Alkaline Fuel Cell

摘要: 阴离子交换膜(Anion Exchange Membrane, AEM)是碱性聚合物电解质膜燃料电池(Alkaline Polymer Electrolyte Mmbrane Fuel Cell, APEMFC)的核心部件，目前由于氢氧根离子传导率低和稳定性差等问题而无法广泛推广运用。本文尝试运用亲生性材料壳聚糖(CS)制备AEM，对其进行表征和性能研究，并向高分子膜基质中引入无机材料氧化石墨烯(GO)制备复合膜构筑离子通道以提高传导率，同时运用两类材料间的相互作用提高膜的稳定性。发现复合膜的性能较壳聚糖膜大幅提高，离子传导率超过2 × 10⁻² S∙cm⁻¹，正常工作下的能量密度达到1.96 mW∙cm⁻²。

Abstract: The anion exchange membrane (AEM) is the core components of alkaline polymer electrolyte membrane fuel cell (APEMFC), but it can’t be widely used due to the current problems of low hy-droxyl ion conductivity and poor stability. This paper attempted to use the biological material of chitosan (CS) to prepare AEM, and characterization and performance studies were carried out. Introducing the inorganic materials of graphene oxide (GO) to the polymer matrix composite membranes to construct ion channels in order to improve the transmission rate, and using two types of material interaction to enhance membrane stability. It is found that the performance of the composite membrane is greatly improved compared with the chitosan membrane, and the ionic conductivity is more than 2 × 10⁻² S∙cm⁻¹, and the energy density under normal operation reaches 1.96 mW∙cm⁻².