Transient Charging of Mixed Ionic-Electronic Conductors by Anomalous Diffusion

[EN] Mixed ionic-electronic conductors (MIECs) play a pivotal role in energy storage, bioelectronics, and neuromorphic computing. Understanding charge transport dynamics in these materials is crucial for optimising device performance. This study investigates the transient charging behavior of three...

Full description

Bibliographic Details
Authors: Zhang, Heyi|||0000-0003-0443-3367, Rivera-Sierra, Gonzalo|||0009-0008-2651-9157, Rubio-Magnieto, Jenifer|||0000-0002-8736-9163, Bisquert, Juan|||0000-0003-4987-4887, Siahjani-Gultekin, Shirin, Allagui, Anis, Sanjuán, Ignacio, Franco, David, Guerrero, Antonio, Balaguera, Enrique H.
Format: article
Publication Date:2025
Country:España
Institution:Universitat Politècnica de València (UPV)
Repository:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
Language:English
OAI Identifier:oai:riunet.upv.es:10251/225786
Online Access:https://riunet.upv.es/handle/10251/225786
Access Level:Open access
Keyword:Mixed ionic electronic conductors
Anomalous diffusion
Transient charging
Impedance spectroscopy
Ionic transport
Neuromorphic devices
Description
Summary:[EN] Mixed ionic-electronic conductors (MIECs) play a pivotal role in energy storage, bioelectronics, and neuromorphic computing. Understanding charge transport dynamics in these materials is crucial for optimising device performance. This study investigates the transient charging behavior of three representative MIEC systems: PEDOT:PSS, electrochromic WO3, and n-doped PBDF polymer films via electrochemical impedance spectroscopy (EIS) and transient current measurements, focusing on anomalous diffusion. By employing the transmission line model and fractional exponent fitting, a strong correlation is revealed between impedance response and transient current dynamics. The findings provide insights into the role of fractional diffusion in MIEC charge transport and inform the design of advanced electrochemical devices.

Similar Items