Electrosorption-induced deformation of a porous electrode with non-convex pore geometry in electrolyte solutions: A theoretical study

Abstract Porous carbon is well known as a good candidate for the development of electrochemical double-layer capacitors. Predominantly, many conventional carbons are microporous and often described by assumption slit pore geometry. However, there class that significantly different from others, namely templated mesoporous carbons. In this work, we study electrosorption-induced deformation in CMK-3–like mesopores having non-convex Our mean-field approach based on modified Poisson-Boltzmann equation taking into account excluded volume ions within hard-sphere model. We assume caused two effects: ion osmotic pressure electrostatic interactions electric double layers charged rods. estimated pore-load modulus material found an agreement with previously obtained values small-angle neutron scattering (SANS) data analysis. Additionally, studied differential capacitance geometry behavior profiles was similar to flat layers: crowding regime at rather high potentials more pronounced profile asymmetry increasing differences ionic sizes.