Sulfonated Cellulose Membranes Improve the Stability of Aqueous Organic Redox Flow Batteries

The drawbacks of current state-of-the-art selective membranes, such as poor barrier properties, high cost, and recyclability, limit the large-scale deployment electrochemical energy devices redox flow batteries (RFBs) fuel cells. In recent years, cellulosic nanomaterials have been proposed a low-cost green raw material for but their performance in RFBs cells is typically poorer than that sulfonated fluoropolymer ionomer membranes Nafion. Herein, cellulose nanofibrils densely cross-linked to form compact membrane with limited swelling good stability water are used. possess low porosity excellent ionic transport properties. A model aqueous organic battery (AORFB) alizarin red S negolyte tiron posolyte assembled membrane. nanocellulose-based superior terms cyclability comparison displayed by commercially available Nafion 115 due mitigation crossover redox-active components. This finding paves way new materials fully sustainable AORFB solutions.