TOPIC #4
Combined experimental-theoretical study for the development of transition metal complexes-based redox flow batteries
Research area: Post Li-Ion Technologies
Keywords: Redox Flow; Stationary; Coordination chemistry; Electrolyte; DFT
Supervising team: Emmanuel BAUDRIN (UPJV) & Piotr DE SILVA (DTU)
Abstract
AbstractRedox flow batteries are presently potential candidates for stationary energy storage. These systems are based on two flowing electrolytes stored in tanks external to the electrochemical cell. Despite some improvements, most of the systems developed are based on the vanadium redox couples (with solubilities of the order of 1.7-2 mol.L-1). Several recent approaches involve the development of aqueous organic redox flow batteries or the use of mediator-based systems with electroactive solids stored in the tanks.
Over the past few years, various groups have reported stable and innovative transition metal complexes designed to exhibit controlled redox potential and solubility. These are based on different transition metals, such as copper, iron or manganese, complexed with functionalized ligands. The aim of the study will be to develop and optimize new electrolytes based on redox mediators. An experimental approach will be first used to identify potential families of transition metal complexes. Then we will take advantage of theoretical calculations, (DFT) approach to better understand and control the electrochemical activity of these systems as electrolyte, for the positive and negative side. If successful, complete redox flow battery based on two electrolytes will be tested.
Interest for the student
Expected mobility: Depending on the advancement of the project, the PhD student will have the opportunity to spend 2 x 2 months at DTU for training and performing DFT calculations. Besides, he/she will present his/her work at international conferences and be included within the French Network on Redox Flow Batteries.
Career opportunities: Energy storage in general, and in particular redox flow batteries, represent presently a very active and competitive domain which is highly needed within the context of the decarbonization of energy. It is still a growing field with a lot of opportunities within the industry and in academics.
