关键词: 全氟磺酸, 膜, 聚合物, 离子交换, 燃料电池, 全氟磺酸, 膜, 聚合物, 离子交换, 燃料电池

Abstract: Increasing working temperature can improve performance of hydrogen fuel cells，while short-side chain (SSC) perfluorosulfonic acid (PFSA) displays a great potential in this aspect. The properties of PFSA membranes with different side chains are introduced and compared，including ion-exchange capacity (IEC)，processability，mechanical properties，and decomposition stability. The research status of SSC PFSA membrane in proton exchange membrane fuel cells (PEMFC) is outlined. The length of side chain affects performance of PFSA resins remarkably. Absence of ether group and tertiary carbon in SSC PFSA endows it with better stability and durability. Higher conductivity and water retention capability of SSC PFSA membranes make them more suitable for working under harsh conditions，like high temperature and low humidity. Research trends of SSC PFSA are illustrated，including reducing cost，lowering permeability of hydrogen and methanol，elucidating transport and degradation mechanism，and improving running performance under actual conditions.

Key words: perfluorosulphonic acid, membranes, polymers, ion exchange, fuel cells, perfluorosulphonic acid, membranes, polymers, ion exchange, fuel cells