SKM 2023 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 5: Materials in Energy Conversion: Mechanical Properties and Solid State Batteries

MM 5.4: Talk

Monday, March 27, 2023, 11:00–11:15, SCH A 215

Modification of iron-based oxide anodes for potassium ion storage — •Zidong Wang, Huaping Zhao, and Yong Lei — Fachgebiet Angewandte Nanophysik, Institut für Physik & IMN MacroNano, Technische Universität Ilmenau, 98693 Ilmenau, Germany

Due to the abundance of potassium and its easy accessibility, potassium-based electrochemical energy storage technology has attracted extensive research interests and significant progress of it has been made in recent years. Among different anode materials for anodes of potassium-ion storage devices, transition metal oxides especially of iron-based oxides have high potential due to their high capacity and low cost. However, their poor electrical conductivity and weak structure impede their development. In this work, adjustment of the anionic and cationic composition of iron oxides is achieved. This adjustment can effectively result in a high-performance anode for potassium ion storage. In brief, the synergistic effect of multivalent metal cations will result in excellent potassium storage properties. And the conductivity can be further improved by the replacement of anions. Our results indicate that the adjusted iron-based compound can be used as a promising high-performance anode material for potassium ion storage devices.