TY  - JOUR
AU  - Ortmann, Till
AU  - Fuchs, Till
AU  - Eckhardt, Janis K.
AU  - Ding, Ziming
AU  - Ma, Qianli
AU  - Tietz, Frank
AU  - Kübel, Christian
AU  - Rohnke, Marcus
AU  - Janek, Jürgen
TI  - Deposition of Sodium Metal at the Copper‐NaSICON Interface for Reservoir‐Free Solid‐State Sodium Batteries
JO  - Advanced energy materials
VL  - 14
IS  - 5
SN  - 1614-6832
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2023-05400
SP  - 2302729
PY  - 2024
AB  - “Anode-free” solid-state battery concepts are explored extensively as theypromise a higher energy density with less material consumption and simpleanode processing. Here, the homogeneous and uniform electrochemicaldeposition of alkali metal at the interface between current collector and solidelectrolyte 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 uniformsodium layers of several microns thickness are deposited at theCu|Na3.4Zr2Si2.4P0.6O12 interface with high reproducibility. At current densitiesof ≈1 mA∙cm−2, relatively uniform coverage is achieved underneath thecurrent collector, as shown by electrochemical impedance spectroscopy and3D confocal microscopy. In contrast, only slight variations of the coverage areobserved at different stack pressures. Early stages of the sodium metal growthare analyzed by in situ transmission electron microscopy revealing orientedgrowth of sodium. The results demonstrate that reservoir-free (“anode-free”)sodium-based batteries are feasible and may stimulate further research effortsin sodium-based solid-state batteries.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001115802400001
DO  - DOI:10.1002/aenm.202302729
UR  - https://juser.fz-juelich.de/record/1019450
ER  -