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Membranes
Special Issues
Innovative Membrane Materials and Systems for Electrodialysis and Electro-Driven Separations
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Innovative Membrane Materials and Systems for Electrodialysis and Electro-Driven Separations

A special issue of Membranes (ISSN 2077-0375). This special issue belongs to the section "Membrane Applications for Other Areas".

Deadline for manuscript submissions: closed (30 November 2025) | Viewed by 1416

Special Issue Editor

Dr. Ramato Ashu Tufa

E-Mail Website
Guest Editor
Department of Environmental Engineering, University of Calabria (DIAm-UNICAL), Via P. Bucci CUBO 44/A, 87036 Rende, Italy
Interests: ion exchange membranes; salinity gradient power; electrodialytic separations; electrolyzers; CO2 capture and conversion; electro-driven membrane technologies
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The need for sustainable and efficient electrochemical separation technologies is increasing across various disciplines, and ion exchange membranes (IEMs), which play a critical role in the selective and efficient transport of ions, represent promising materials with which to tackle this challenge. This Special Issue will focus on innovative research and new developments in the design of IEMs and their application in advanced electrochemical membrane systems, with an emphasis on technologies used in electrodialysis, reverse electrodialysis, electrolysis, and related operations. We invite contributions of original research papers, reviews, perspectives, and short communications on these topics. Submissions discussing novel solutions and fundamental advancements in the following broad application fields are highly encouraged:

  • Desalination and water reuse;
  • The food and beverage industry;
  • Carbon capture and utilization;
  • Resource recovery;
  • Biotechnology and bioprocessing;
  • The chemical and petrochemical industry;
  • Energy and batteries;
  • Agriculture and irrigation;
  • Healthcare and medicine;
  • Laboratory and analytical science.

The topics of interest include but are not limited to

  • Novel materials and nanocomposites for use in ion exchange membranes;
  • Ion-selective and monovalent-selective membrane technologies;
  • Bipolar membranes for water splitting and pH control;
  • Electrochemical systems involved in electrodialysis, redox flow batteries, and fuel cells;
  • Membrane-based approaches for CO2 reduction and energy storage;
  • The recovery of lithium and critical ions from brine and waste streams;
  • Antifouling strategies, membrane degradation, and durability performance;
  • The modeling, simulation, and life-cycle analysis of membrane processes;
  • Hybrid systems integrating IEMs with biological or physicochemical technologies;
  • Multidisciplinary insights from materials science, electrochemistry, and environmental engineering.

We look forward to receiving your valuable contributions.

Dr. Ramato Ashu Tufa
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Membranes is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • ion exchange membranes (IEMs)
  • electrochemical membrane systems
  • electrodialysis
  • reverse electrodislydis
  • electrolysis

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Published Papers (1 paper)

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Research

17 pages, 6853 KB  
Article
Experimental Performances of Titanium Redox Electrodes as the Substitutes for the Ruthenium–Iridium Coated Electrodes Used in the Reverse Electrodialysis Cells for Hydrogen Production
by Zhaozhe Han, Xi Wu, Lin Xu and Ping He
Membranes 2026, 16(1), 26; https://doi.org/10.3390/membranes16010026 - 3 Jan 2026
Viewed by 1095
Abstract
Reverse electrodialysis (RED) enables the efficient conversion of the chemical potential difference between seawater and freshwater into electricity while simultaneously facilitating hydrogen production for integrated energy utilization. Nevertheless, the widespread deployment of RED remains constrained by the reliance on ruthenium–iridium-coated electrodes, which are [...] Read more.
Reverse electrodialysis (RED) enables the efficient conversion of the chemical potential difference between seawater and freshwater into electricity while simultaneously facilitating hydrogen production for integrated energy utilization. Nevertheless, the widespread deployment of RED remains constrained by the reliance on ruthenium–iridium-coated electrodes, which are expensive and resource-limited. This study proposes the adoption of titanium-based redox electrodes as a replacement for traditional precious metal electrodes and employs a novel spike structure to accelerate hydrogen bubble detachment. The electrochemical performance of titanium electrodes in an RED hydrogen production system was systematically evaluated experimentally. The influences of several parameters on the RED system performance were systematically examined under these operating conditions, including the ruthenium–iridium catalytic layer, operating temperature (15 to 45 °C), electrode rinse solution (ERS) concentration (0.1 to 0.7 M), and flow rate (50 to 130 mL·min−1). Experimental results demonstrate that optimized titanium redox electrodes maintain high electrocatalytic activity while significantly reducing system costs. Under optimal conditions, the hydrogen yield of the Ti redox electrode reached 89.7% of that achieved with the mesh titanium plate coated oxide iridium and oxide ruthenium as electrodes, while the electrode cost was reduced by more than 60%. This is also one of the cost-cutting solutions adopted by RED for its development. Full article
(This article belongs to the Special Issue Innovative Membrane Materials and Systems for Electrodialysis and Electro-Driven Separations)
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