Modeling of Porous Electrodes for an Optimized Material Design
Modélisation d’électrodes poreuses pour leur conception optimisée
This project is dedicated to a bottom-up approach to optimize the design of porous electrode materials devoted to bio-batteries and biosensors. These devices operate on the basis of complex enzymatic electrochemical redox reactions coupled to mass transfer of substrates (glucose and O2) and electron transfer within the pores of the structure and from/to the pore surfaces. The overall performance of the electrode is hence intimately related to the choice of the reagents and the placement within the pore structure and, above all, to the architecture of the material at the pore-scale. Some very interesting techniques have been elaborated to synthetize porous materials having a typical pore size on the order of the micron In this context, a rationalized microstructure design, for optimal performance, is really a cornerstone on the way to innovative biodevices. The objective here is to carefully derive the physical models, from the pore-scale to the macro-scale, through which the electrode current-to-potential dependency with respect to the microstructure can be elucidated and extensively exploited to optimize the porous architecture. Engineering of electrode prototypes based on the resulting optimized materials will be carried out and experimental tests of their efficiency will be performed.
Institut de Mécanique et d’Ingénieries de Bordeaux, UMR CNRS 5295
Laboratoire des Composites Thermo Structuraux, UMR CNRS 5801
L’Institut des Sciences Moléculaires de Bordeaux, UMR CNRS 5255