Perspectives on Membranes and Separators for Electrochemical Energy Conversion and Storage Devices

This article is a perspective that introduces the theme of this issue of Polymer Reviews, that being polymeric membranes and fuel cells for battery (energy storage) and fuel cell (energy conversion) applications. This short article reviews the need for batteries and fuel cells, the key properties of membranes/separators for such devices, the R&D steps required for the fabrication of new a membrane/separator, and the importance of the five review articles in this issue, in addressing cutting-edge research topics.