Co-Sintering Study of Na0.67[Ni0.1Fe0.1Mn0.8]O2 and NaSICON Electrolyte–Paving the way to High Energy Density All-Solid-State Batteries

Sodium is a promising candidate for stationary storage applications, especially when the demand lithium-ion batteries increases due to electromobility applications. Even though its energy density lower, Na-ion technology estimated lead cost reduction of 30% compared Li-ion technology. To improve safety as well density, Na-based all-solid-state-batteries featuring solid electrolytes such beta-alumina and sodium superionic conductors cathode materials Na 3 V 2 (PO4) x CoO have been developed over past years. However, biggest challenge are mixed cathodes with highly conductive interfaces, co-sintering materials. For example, conductor type Zr Si PO 12 electrolyte sinters at 1,250°C, whereas corresponding decomposes temperatures higher than 900°C, posing bottleneck. Thus in this paper, we synthesized 0.62 [Ni 0.10 Fe Mn 0.80 ]O material all-solid-state sodium-ion via relatively cheap easy solution-assisted state reaction processing route. The thermal investigations pure found no degradation up 1,260°C, making it perfect match 3.4 2.4 P 0.6 O electrolyte. In our aim produce co-sintered cathode, electron microscopy investigation showed dense microstructure elemental mapping performed dispersive X-ray spectroscopy secondary ion mass spectrometry confirm that do not react during sintering. active forms rich deficient phase which needs further understand origin impact on electrochemical performance.