How to speed up ion transport in nanopores.

ABSTRACT: Electrolyte-filled subnanometre pores exhibit exciting physics and play an increasingly important role in science and technology. In supercapacitors, for instance, ultranarrow pores provide excellent capacitive characteristics. However, ions experience difficulties in entering and leaving such pores, which slows down charging and discharging processes. In an earlier work we showed for a simple model that a slow voltage sweep charges ultranarrow pores quicker than an abrupt voltage step. A slowly applied voltage avoids ionic clogging and co-ion trapping-a problem known to occur when the applied potential is varied too quickly-causing sluggish dynamics. Herein, we verify this finding experimentally. Guided by theoretical considerations, we also develop a non-linear voltage sweep and demonstr

SUBMITTER: Breitsprecher K 

PROVIDER: S-EPMC7705656 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature