Dual-Functional Hydroxyethylidene Diphosphate Additive for Broadening the Operating Temperature Range and Optimizing the Reaction Kinetics of Electrolyte in Vanadium Redox Flow Battery
Demonstrates improved thermal stability and electrochemical performance in vanadium electrolytes using hydroxyethylidene diphosphate additive.
Key Points
The research aims to investigate the effects of hydroxyethylidene diphosphate (HEDP) on the performance of vanadium redox flow batteries, particularly focusing on thermal stability and electrochemical activity.
Introduction of HEDP as a bifunctional additive in vanadium electrolytes
Systematic exploration of its impacts on thermal stability and electrochemical performance
Charge–discharge cycling conducted at 50 °C and a current density of 250 mA cm–2
HEDP effectively inhibits V species aggregation and crystallization.
Battery with HEDP shows approximately twice the capacity retention compared to unmodified control after 50 cycles.