Charging dynamics of an individual nanopore.

ABSTRACT: Meso-porous electrodes (pore width « 1 µm) are a central component in electrochemical energy storage devices and related technologies, based on the capacitive nature of electric double-layers at their surfaces. This requires that such charging, limited by ion transport within the pores, is attained over the device operation time. Here we measure directly electric double layer charging within individual nano-slits, formed between gold and mica surfaces in a surface force balance, by monitoring transient surface forces in response to an applied electric potential. We find that the nano-slit charging time is of order 1 s (far slower than the time of order 3 × 10^-2 s characteristic of charging an unconfined surface in our configuration), increasing at smaller slit thickness, and dec

SUBMITTER: Tivony R 

PROVIDER: S-EPMC6181992 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature