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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 9: KFM Poster Session

KFM 9.6: Poster

Montag, 18. März 2024, 18:00–20:00, Poster E

Building non-dendritic and activity-enhanced sodium CO2 batteries via distorted FeCu interface — •Changfan XU, Tzuchin Huang, 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, FeCu nanoparticles grown on carbon paper (CP@FeCu) 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 CP@FeCu 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 CP@FeCu anode with dense and flat interfaces, delivering enhanced Coulombic efficiency and cycling stability. Meanwhile, Na-CO2 batteries with CP@FeCu cathode demonstrates low overpotentials and excellent cycling stability. Significantly, excellent electrochemical properties are obtained in the full battery (CP@FeCu@Na || CP@FeCu), laying the foundation for practical applications of Na-CO2 batteries.

Keywords: CO2 batteries; Na metal anode; CO2 cathode; dendrite-free; electrocatalysis