International Business Machines Corporation

Tobias Binninger

Teodoro Laino

Valery Weber

Federico Zipoli

Electrochemical energy storage devices are provided comprising an anode, a cathode and a solid-state electrolyte adapted for Na-ion conduction between the anode and cathode. The solid-state electrolyte includes, for example, a solid solution of doped NaAlOhaving a composition defined by one of D(NaAlO)in which D is at least one of GeO, SnO, TiO, ZrOand HfO, and D(NaAlO)in which D is PAlO, where 0&#x3c;x&#x2264;0.5. Other solid-state electrolyte compositions are also disclosed.

Electrochemical energy storage devices with sodium-ion conducting solid-state electrolytes

An electrochemical energy storage device is provided. The device may include a solid-state anode layer. The device may comprise a solid-state electrolyte layer. Further, the device may comprise a solid-state cathode layer. At least two adjacent ones out of the solid-state anode layer, the solid-state electrolyte layer, and the solid-state cathode layer may form a solid-state single-crystal with varying chemical compositions between the related layers. The solid-state electrolyte layer may have an ionic conductivity at room temperature higher than 10S/cm.

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Zurich, Switzerland

Tobias Binninger