All-vanadium liquid flow battery decay

What factors contribute to the capacity decay of all-vanadium redox flow batteries?

Learn more. A systematic and comprehensive analysis is conducted on the various factors that contribute to the capacity decay of all-vanadium redox flow batteries, including vanadium ions cross-over, self-discharge reactions, water molecules migration, gas evolution reactions, and vanadium precipitation.

What is a vanadium redox flow battery?

The vanadium redox flow battery (VFB) is an attractive storage technology for large-scale storage applications because of its decoupled power and energy rating. As for almost all rechargeable batteries, VFB encounter the problem of capacity loss after a certain duration of charge–discharge operation.

Are Nafion series membranes suitable for vanadium redox flow batteries?

Nafion series membranes are widely used in vanadium redox flow batteries (VRFBs). However, the poor ion selectivity of the membranes to vanadium ions, especially for V 2+, results in a rapid capacity decay during cycling.

Why does a vanadium electrolyte deteriorate a battery membrane?

Exposure of the polymeric membrane to the highly oxidative and acidic environment of the vanadium electrolyte can result in membrane deterioration. Furthermore, poor membrane selectivity towards vanadium permeability can lead to faster discharge times of the battery. These areas seek room for improvement to increase battery lifetime.