Journal article

Authors list: Ortmann, Till; Fuchs, Till; Eckhardt, Janis K; Ding, Ziming; Ma, Qianli; Tietz, Frank; Kübel, Christian; Rohnke, Marcus; Janek, Jürgen

Publication year: 2024

Journal: Advanced Energy Materials

Volume number: 14

Issue number: 15

ISSN: 1614-6832

eISSN: 1614-6840

Open access status: Hybrid

DOI Link: https://doi.org/10.1002/aenm.202302729

Publisher: Wiley

Abstract: 

"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 approximate to 1 mA center dot 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.

Harvard Citation style: Ortmann, T., Fuchs, T., Eckhardt, J., Ding, Z., Ma, Q., Tietz, F., et al. (2024) Deposition of Sodium Metal at the Copper-NaSICON Interface for Reservoir-Free Solid-State Sodium Batteries, Advanced Energy Materials, 14(15), Article 2302729. https://doi.org/10.1002/aenm.202302729

APA Citation style: Ortmann, T., Fuchs, T., Eckhardt, J., Ding, Z., Ma, Q., Tietz, F., Kübel, C., Rohnke, M., & Janek, J. (2024). Deposition of Sodium Metal at the Copper-NaSICON Interface for Reservoir-Free Solid-State Sodium Batteries. Advanced Energy Materials. 14(15), Article 2302729. https://doi.org/10.1002/aenm.202302729