Enabling Interfacial Compatible and High-Voltage-Tolerant Lithium Metal Batteries with Gradient Composited Solid-Sate Electrolytes

A gradient PEO-based composited electrolyte with Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) as ceramic fillers is developed toward interfacial compatible and high-voltage tolerant lithium metal batteries.