Dr Georgios Nikiforidis

January, 2020 - January, 2021
LE STUDIUM Research Fellowship


King Abdullah University of Science and Technology (KAUST) - SA

In residence at

Physical Chemistry of Materials and Electrolytes for Energy (PCM2E) / University of Tours - FR

Host scientist

Prof. Mérièm Anouti 


1/ Vanadium Redox Flow Battery (RFB) with an ionic liquid (IL)/H2O electrolyte
Here we are investigating the performance of the vanadium RFB in the presence of an novel electrolyte, close to pH neutral. The investigation entails the pshysichochemical and electrochemical characterization of the electrolyte for the positive and negative side of the battery. As a final step, the optimization of the parameters of the battery (flow, concentration, membrane, electrodes) will be executed to yield a long-term robust RFB system.  
2/ Semi-flow advanced Intermediate Temperature NaS battery 
Here we are implementing thiol and disulfide additives to the catholyte in search of superior capacity and longer cycleability for the IT NaS battery system. The  pshysichochemical and electrochemical properties of the electrolytes will be characterized and in turn implement in a tubular battery for testing and optimization. 

Events organised by this fellow


Final reports

Georgios Nikiforidis
Mérièm Anouti
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A protic ionic liquid is inctroduced for the first time as a solvent for a high energy density vanadium redox flow battery.  The proof-of-concept redox flow cell with a concentration of 3 mol L−1 vandyl sulfate electrolyte was tested for a total of 30 cycles at 40°C, showing an open circuit potential of 1.38 V, a nominal capacity of 1900 mAh at a current density of 40 mA cm−1 and energy and coulombic efficiencies of 64 and 90%, respectively. The continuous 16 hours of cycling suggest that the concentrated anolyte and catholyte are thermally stable and cycleable. This study underlines a new route to improve the energy-to-volume ratio of this promising energy storage system.