ArticleEnvironmental science & technology2026
Membrane-Free Polymer-Based Faradaic Deionization System for Enhanced Desalination.
Article in Environmental science & technology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The development of cost-effective and energy-efficient water desalination technologies remains a critical challenge, particularly for treating brackish water. Herein, we present a membrane-free, dual-polymer electrochemical deionization system that leverages the complementary ion selectivities of polyaniline chloride (PAni-Cl) and poly(naphthalene diimide-ethylenediamine) (PNDIE) to achieve simultaneous sodium and chloride ion removal. By eliminating ion-exchange membranes and utilizing a simple separator, the proposed system minimizes operational complexity and cost while maintaining efficient ionic transport. Initially, the electropolymerized PAni-Cl buckypaper electrode exhibited enhanced electronic conductivity and remarkable cycling stability, retaining 84% of its initial performance after 800 cycles (15 days of operation). Comparative evaluation of three cell architectures, a symmetric CDI cell, a hybrid YP80F//PNDIE cell, and a full polymer-based cell, revealed that the dual-polymer configuration outperforms conventional setups, attaining a salt removal capacity of up to 64 mg·g
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