Vanadium redox flow battery (VRFB) is a new type of electrochemical energy storage device with environmental friendly
long life
high safety and stable electrochemical performance. It is one of the current energy storage systems with great development potential. Electrodes and proton exchange membranes are key materials for VRFB and play decisive role in the electrochemical performance of the batteries. According to the differences in raw materials and structures of key materials. In this paper
the classification and characteristics of electrode and proton exchange membrane are described in detail
and the recent progress of the structure and functional modification of the two key materials as well as the composite and modification methods of different materials are summarized
and the future research emphasis and development direction are described.