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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 46: Poster II
CPP 46.45: Poster
Donnerstag, 12. März 2026, 09:30–11:30, P5
Organic cathodes based on polyaniline and cellulose for aqueous Zn-ion batteries — •Ramsha Wasi Khan1, Meriem Boudjenane1, Gilles Wittmann1, Xaver Brehms2, Simon Schraad3, Xinyu Jiang3, Stephan V. Roth3, and Lucas P. Kreuzer1 — 1Heinz Maier Leibnitz Zentrum (MLZ), TUM, Garching, Germany — 2CEA, Grenoble, France — 3DESY, Hamburg, Germany
Aqueous zinc-ion batteries are promising candidates for a non-toxic and safer alternative to lithium-ion batteries, where organic cathodes provide distinct advantages of sustainability, tunability and mechanical flexibility. In this work, we investigate the role of polyaniline (PANI) as an organic cathode material, motivated by its high theoretical capacity, reversible redox chemistry, and intrinsic electrical conductivity. To enhance stability against humidity-induced degradation, cellulose derivatives are employed as green binders, enabling regulation of water uptake and improved mechanical stability. Comprehensive multiscale characterization is conducted to optimize the electrochemical performance and structural integrity of PANI-based cathodes, as well as understand the morphological changes and nanoscale water dynamics under humidity. Advanced techniques such as cyclic voltammetry, scanning electron microscopy (SEM), and quasi-elastic neutron scattering (QENS) are used to support this analysis. It was observed that the use of composite cellulose films as a binder with an optimized composition effectively triples the current density and improves peak reproducibility as well as the water uptake behaviour of the film.
Keywords: Organic cathodes; Zinc-ion batteries; Water; Cellulose; Neutron scattering