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| Hauptseite > Publikationsdatenbank > Deposition of Sodium Metal at the Copper‐NaSICON Interface for Reservoir‐Free Solid‐State Sodium Batteries |
| Hauptseite > Publikationsdatenbank > Deposition of Sodium Metal at the Copper‐NaSICON Interface for Reservoir‐Free Solid‐State Sodium Batteries |
| Journal Article | FZJ-2023-05400 |
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2024
Wiley-VCH
Weinheim
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Please use a persistent id in citations: doi:10.1002/aenm.202302729 doi:10.34734/FZJ-2023-05400
Abstract: “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.
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