Jörg Ackermann

 

Characterization of porous cathode materials using methods of NMR

Pulse sequence and signal attenuation used to derive restricted diffusion in porous materials Copyright: J. Ackermann Pulse sequence and signal attenuation used to derive restricted diffusion in porous materials

For batteries and fuel cells, but also for the synthesis of base chemicals in industrial processes, electrodes are elementary and efficiency determining components. To maximize the surface area (three-phase-boundary, TPB) between the reactants, porous cathode materials are employed. A fundamental understanding of the wetting properties and the diffusion of reactants and electrolysis products inside porous cathodes is key in developing future high efficiency materials. These properties shall be investigated in this master thesis at IEK-9, employing nuclear magnetic resonance techniques facilitating pulsed field gradients.