Data for Publication "Deposition of Sodium Metal at the Copper-NaSICON Interface for Reservoir-free Solid-State Sodium Batteries"

Abstract

<p><strong>Description:</strong> The data set consists of series of measurements from electrochemical impedance spectroscopy (EIS), optical microscopy, 3D confocal microscopy, focused ion beam - scanning electron microscopy (FIB-SEM), and in situ scanning transmission electron microscpy (STEM) to characterize sodium metal deposition at the Cu|NaSCION interface. The data set presented serves as the basis for the following publication:</p><p><strong>Title:</strong> Deposition of Sodium Metal at the Copper-NaSICON Interface for Reservoir-free Solid-State Sodium Batteries</p><p><strong>Authors:</strong> Till Ortmann, Till Fuchs, Janis K. Eckhardt, Ziming Ding, Qianli Ma, Frank Tietz, Christian Kübel, Marcus Rohnke, Jürgen Janek</p><p><strong>DOI:</strong> https://doi.org/10.1002/aenm.202302729 </p><p>"Anode‐free" solid‐state battery concepts are explored extensively as they promise a higher energy density with less material consumption and simple anode processing. Here, the homogeneous and uniform electrochemical deposition of alkali metal at the interface between current collector and solid electrolyte plays the central role to form a metal anode within the first cycle. While the cathodic deposition of lithium has been studied intensively, knowledge on sodium deposition is scarce. In this work, dense and uniform sodium layers of several microns thickness are deposited at the Cu|Na3.4Zr2Si2.4P0.6O12 interface with high reproducibility. At current densities of ≈1 mA∙cm−2, relatively uniform coverage is achieved underneath the current collector, as shown by electrochemical impedance spectroscopy and 3D confocal microscopy. In contrast, only slight variations of the coverage are observed at different stack pressures. Early stages of the sodium metal growth are analyzed by in situ transmission electron microscopy revealing oriented growth of sodium. The results demonstrate that reservoir‐free ("anode‐free") sodium‐based batteries are feasible and may stimulate further research efforts in sodium‐based solid‐state batteries. </p><p>Abstract from: https://doi.org/10.1002/aenm.202302729 </p&gt