SKM 2023 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 6: Poster

KFM 6.13: Poster

Dienstag, 28. März 2023, 17:00–19:00, P3

Engineering of Dendrite-Free and Activity-Enhanced Dual-Functional Electrodes for High-Energy Na-CO2 Batteries — •Changfan Xu, Huaping Zhao, and Yong Lei — Fachgebiet Angewandte Nanophysik, Institut für Physik & IMN MacroNano, Technische Universität Ilmenau, 98693 Ilmenau, Germany

Constructing suitable multifunctional electrodes for dendrite-free anodes and kinetics-enhanced CO2 cathodes is considered one of the most important ways to further advance the practical application of Na-CO2 batteries. Herein, Ru nanoparticles grown on carbon paper (RuCP) are rationally designed and employed as both Na anode and CO2 cathode in Na-CO2 batteries. The outstanding electrical conductivity, superior sodiophilicity, and high catalytic activity of RuCP electrodes can simultaneously contribute to homogenous Na+ distribution and dendrite-free sodium structure, and strengthen discharge and charging kinetics. The morphological evolution confirms uniform deposition of Na on RuCP anode with dense and flat interfaces, delivering enhanced Coulombic efficiency and cycling stability. Meanwhile, Na-CO2 batteries with RuCP cathode demonstrates low overpotentials and excellent cycling stability. Significantly, excellent electrochemical properties are obtained in the full battery (RuCP@Na || RuCP), laying the foundation for practical applications of Na-CO2 batteries.