The intrinsic volumetric capacitance of conducting polymers: pseudo-capacitors or double-layer supercapacitors?

ABSTRACT: The capacitance of conducting polymers represents one of the most important material parameters that in many cases determines the device and material performances. Despite a vast number of experimental studies, the theoretical understanding of the origin of the capacitance in conducting polymers remains unsatisfactory and appears even controversial. Here, we present a theoretical method, based on first principle capacitance calculations using density functional theory (DFT), and apply it to calculate the volumetric capacitance of two archetypical conducting polymers: poly(3,4-ethylene dioxythiophene) (PEDOT) and polypyrrole (PPy). Our aim is to achieve a quantitate description of the volumetric capacitance and to provide a qualitative understanding of its nature at the atomistic level. We

SUBMITTER: Sahalianov I 

PROVIDER: S-EPMC9076818 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature