期刊
ADVANCED MATERIALS INTERFACES
卷 9, 期 3, 页码 -出版社
WILEY
DOI: 10.1002/admi.202101254
关键词
critical current density; hydroborate; Na anode; solid electrolyte; stack pressure
资金
- University of Geneva
- Swiss National Science Foundation [200021L_192191]
- Universite de Geneve
- Swiss National Science Foundation (SNF) [200021L_192191] Funding Source: Swiss National Science Foundation (SNF)
By testing the solid electrolyte Na-4(CB11H12)(2)(B12H12) at different stack pressures and current densities, critical conclusions were drawn regarding its mechanical behavior at the interface with the sodium anode, providing solutions for interfacial instability in solid-state batteries.
Stack pressure and mechanical robustness are two important parameters needed to tackle the interfacial instability of solid-state batteries. Here, the mechanical behavior of Na-4(CB11H12)(2)(B12H12), as solid electrolyte at the interface with Na anode, is reported. The solid electrolyte is tested as function of stack pressure and different current densities, revealing a critical current density of 0.6 mA cm(-2) at room temperature and an optimal stack pressure of 1.5 MPa. These findings are achieved, thanks to the adoption of a multilayer approach, demonstrating the powerfulness of hydroborates to compensate chemical and electrochemical instability, simply employing different complex hydride polyanions that change locally the electrochemical properties while preserving structural and chemical coherence.
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