Ion-exchange membranes which consist of polymer backbones attached with fixed charge groups have been widely used in various electrochemical water treatment and energy processes. A pore-filled ion-exchange membranes (PFIEMs), composed of an inert and tough porous substrate and an ionomer that fills the pores, is considered as a promising candidate for various commercial applications because they can be manufactured via a cheap process and also provide both high ion conductivity and excellent mechanical properties. We will introduce the recent results on the development of high performance PFIEMs for various electrochemical applications such as direct fuel alkaline fuel cells, reverse electrodialysis, and capacitive deionization etc. (Acknowledgements: NRF-2015H1C1A1034436 and MOTIE-10047796)