A review of transport models in charged porous electrodes

Jorge Federico Gabitto, Costas Tsouris

Research output: Contribution to journalReview articlepeer-review

3 Scopus citations

Abstract

There is increased interest in many different processes based upon interactions between a charged solid surface and a liquid electrolyte. Energy storage in capacitive porous materials, ionic membranes, capacitive deionization (CDI) for water desalination, capacitive energy generation, removal of heavy ions from wastewater streams, and geophysical applications are some examples of these processes. Process development is driven by the production of porous materials with increasing surface area. Understanding of the physical phenomena occurring at the charged solid-electrolyte interface will significantly improve the design and development of more effective applied processes. The goal of this work is to critically review the current knowledge in the field. The focus is on concepts behind different models. We start by briefly presenting the classical electrical double layer (EDL) models in flat surfaces. Then, we discuss models for porous materials containing macro-, meso-, and micro-pores. Some of the current models for systems comprising two different pore sizes are also included. Finally, we discuss the concepts behind the most common models used for ionic transport and Faradaic processes in porous media. The latter models are used for simulation of electrosorption processes in porous media.

Original languageEnglish
Article number1051594
JournalFrontiers in Chemical Engineering
Volume4
DOIs
StatePublished - 2022

Funding

Partial support to JG by a RISE Grant from the office of the Vice-President of Research at PVAMU is kindly acknowledged. Partial support to CT by NAWI is also acknowledged. This study was conducted at Prairie View A&M University and the Oak Ridge National Laboratory (ORNL). ORNL is managed by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. This work was partially supported by a RISE Grant from the office of the Vice-President of Research at PVAMU and by the National Alliance for Water Innovation (NAWI), through funding from the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office, under Funding Opportunity Announcement DE-FOA-0001905.

Keywords

  • CDI
  • EDL
  • intercalation materials
  • ionic transport
  • porous medium/fluid interface

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