Carbons with Regular Pore Geometry Yield Fundamental Insights into Supercapacitor Charge Storage.

ABSTRACT: We conduct molecular dynamics simulations of electrical double-layer capacitors (EDLCs) using a library of ordered, porous carbon electrode materials called zeolite templated carbons (ZTCs). The well-defined pore shapes of the ZTCs enable us to determine the influence of pore geometry on both charging dynamics and charge storage mechanisms in EDLCs, also referred to as supercapacitors. We show that charging dynamics are negatively correlated with the pore-limiting diameter of the electrode material and display signatures of both progressive charging and ion trapping. However, the equilibrium capacitance, unlike charging dynamics, is not strongly correlated to commonly used, purely geometric descriptors such as pore size. Instead, we find a strong correlation of capacitance to the charge co

SUBMITTER: Liu YM 

PROVIDER: S-EPMC6891853 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature