Impedance of nanocapacitors from molecular simulations to understand the dynamics of confined electrolytes.

ABSTRACT: Nanoelectrochemical devices have become a promising candidate technology across various applications, including sensing and energy storage, and provide new platforms for studying fundamental properties of electrode/electrolyte interfaces. In this work, we employ constant-potential molecular dynamics simulations to investigate the impedance of gold-aqueous electrolyte nanocapacitors, exploiting a recently introduced fluctuation-dissipation relation. In particular, we relate the frequency-dependent impedance of these nanocapacitors to the complex conductivity of the bulk electrolyte in different regimes, and use this connection to design simple but accurate equivalent circuit models. We show that the electrode/electrolyte interfacial contribution is essentially capacitive and that the electr

SUBMITTER: Pireddu G 

PROVIDER: S-EPMC11067016 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature