Berlin 2024 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 25: Interface Controlled Properties, Nanomaterials and Microstructure Design IV

MM 25.4: Talk

Tuesday, March 19, 2024, 12:30–12:45, C 230

Positive and Negative Structured 3D Nano Current Collectors Based on AAO Templates Applied for Sodium Metal Anodes — •Mo Sha and Yong Lei — Fachgebiet Angewandte Nanophysik, Institut für Physik & IMN MacroNano, Technische Universität Ilmenau, 98693 Ilmenau, Germany

The uncontrollable dendrite growth leads to safety issues during plating/stripping processes, severely restricting the practical application of sodium metal batteries (SMBs). 3D nano current collectors exhibit great potential for stabilizing the Na anode by homogenizing the electric field and Na ion flux distribution. Herein, 3D nanopore arrays (NPAs) and 3D nanorod arrays (NRAs) current collectors with opposite structures have been prepared with the AAO-template-assisted method. As current collectors for SMBs, both 3D NPAs and 3D NRAs have better electrochemical performance than 2D foil, demonstrating the great potential of 3D nanostructured current collectors based on AAO templates for SMBs. Compared with 3D NRAs, 3D NPAs have better electrochemical performance at a certain depth, with a long cycling stability of 1000 cycles at 1 mAh*cm-2 and 1 mA*cm-2 and a small nucleation potential of about 2 mV.

Keywords: Current Collectors; Sodium Metal Anodes; AAO Templates; 3D Architectures; Energy storage