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LE STUDIUM THURSDAY : A highly concentrated Vanadium Protic Ionic Liquid Electrolyte for the Vanadium Redox Flow Battery

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Avec la participation du Dr Georgios Nikiforidis et du Dr Rebecca Tharme

A highly concentrated Vanadium Protic Ionic Liquid Electrolyte for the Vanadium Redox Flow Battery
Dr Georgios Nikiforidis

A protic ionic liquid is designed and implemented for the first time as a solvent for a high energy density vanadium redox flow battery. Despite being less conductive than standard aqueous electrolytes, it is thermally stable on a 100° temperature window, chemically stable for at least four weeks, equally viscous and dense with typical aqueous solvents and most importantly able to solubilize to 6 mol L-1 vanadium sulfate, thus increasing the Vanadium Redox Flow Battery energy density by a factor of 2.5. Electrochemical measurements revealed quasi-reversible redox transitions for both catholyte and anolyte at 25°C while a proof-of-concept redox flow cell with the proposed electrolyte was tested for a total of 150 cycles, showing an open circuit potential of 1.39 V and energy and coulombic efficiencies of 65 and 93%, respectively. What’s more, the battery can be equally cycled at 45°C showing good thermal stability. This study underlines a new route to improve the energy-to-volume ratio of this promising energy storage system.

Riverscapes and Lifeways - Biocultural Diversity and Flow Management in Large Rivers
Dr Rebecca Tharme

For millennia, people have been part of nature in riverscapes, coevolving with the living rivers that are the very hearts of these landscapes. The world’s large river systems have been vital routes for the adaptation, cultural identity, and material and spiritual wellbeing of human civilizations, and of the ecosystems and biological diversity. River flows continue to connect people, places, and wildlife today, inspiring and sustaining diverse cultural beliefs, values, and ways of life.
Through my talk, I aim to highlight and explore the interlinked diversity of river nature and culture, particularly in the context of the global biocultural diversity crisis - in large part a consequence of the fragmentation and flow regulation impacts of infrastructure development. I will introduce new frontiers in environmental flow management and conservation that are beginning to enrich our transdisciplinary knowledge and understanding of interrelationships between healthy rivers and dependent peoples. Finally, I will mention emerging collaborations that hold some promise of more sustainably managed riverscapes in the future.

Please confirm your attendance by replying to this address: before the 9th of September 2020.