All vanadium redox flow battery (VRB) is accepted as a electrochemical energy storage device for the load levelling and peak shaving of the grid, the power supply for remote area, the charging power source for the electric vehicles, and the uninterruptible power supply. As one of the key components in VRB system, the membrane, in the terms of its structures and properties, is responsible for the efficiencies of the VRB. The ion conductivity and vanadium ions permeation of the membrane affect the voltage efficiency and coulombic efficiency of the battery, respectively. The chemical stability of the membrane determines the long-term performance and lifetime of the battery. This review mainly summarizes the preparation and properties of the fluorinated ionic exchange membranes, the non-fluorinated ionic exchange membranes, and the pore membranes. The promising research strategies are outlook. Contents
1 Introduction
2 Fluorinated ionic exchange membranes
2.1 Nafion membranes
2.2 PVDF grafted membranes
2.3 PTFE grafted membranes
3 Non-fluorinated ionic exchange membranes
3.1 Poly (aryl ether)s membranes
3.2 Other membranes
4 Pore separation membranes
5 Conclusion and outlook