What question did this study set out to answer?

To investigate the interfacial stability, kinetics, and pore formation mechanisms at the sodium metal anode interface with a NASICON-type solid electrolyte.

December 23, 2022Advanced Energy MaterialsOpen Access

Kinetics and Pore Formation of the Sodium Metal Anode on NASICON‐Type Na3.4Zr2Si2.4P0.6O12 for Sodium Solid‐State Batteries

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Authors

TOTill OrtmannJustus-Liebig-Universität Gießen SBSimon BurkhardtUniversität Hamburg JEJanis K. EckhardtJustus-Liebig-Universität Gießen

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Implication

Experimental study reveals current constriction and pore formation in sodium solid-state battery interfaces, highlighting the role of mechanical pressure in interface healing.

Key Points

To investigate the interfacial stability, kinetics, and pore formation mechanisms at the sodium metal anode interface with a NASICON-type solid electrolyte.
Evaluated the Na|Na3.4Zr2Si2.4P0.6O12 interface using time-resolved impedance analysis, in situ X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM).
Characterized interfacial resistance and structural evolution via pressure- and temperature-dependent impedance spectroscopy alongside cross-sectional imaging after anodic dissolution under varying mechanical loads.
Interface kinetics are primarily limited by current constriction caused by vacancy accumulation and pore development rather than charge transfer resistance.
Interfacial pores naturally equilibrate even under minimal mechanical load due to rapid vacancy diffusion in sodium metal, while increased mechanical pressure accelerates interfacial healing through creep.

Cite This Study

Ortmann et al. (2022) studied this question.

synapsesocial.com/papers/69d73e1635079b684748fa1e https://doi.org/10.1002/aenm.202202712

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Implication

Experimental study reveals current constriction and pore formation in sodium solid-state battery interfaces, highlighting the role of mechanical pressure in interface healing.

Kinetics and Pore Formation of the Sodium Metal Anode on NASICON‐Type Na3.4Zr2Si2.4P0.6O12 for Sodium Solid‐State Batteries

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Key Points

Cite This Study

Kinetics and Pore Formation of the Sodium Metal Anode on NASICON‐Type Na3.4Zr2Si2.4P0.6O12 for Sodium Solid‐State Batteries

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Implication

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Cite This Study

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