Scalable Synthesis of SiO-TiON Composite As an Ultrastable Anode for Li-Ion Half/Full Batteries.

Among various anode materials, SiO is regarded as the next generation of promising anode due to its advantages of high theoretical capacity with 2680 mA h g, low lithium voltage platform, and rich natural resources. However, the pure SiO-based materials have slow lithium storage kinetics attributed to their low electron/ion conductive properties and the large volume change during lithiation/delithiation, restricting their practical application. Optimizing the SiO material structures and the fabricating methods to mitigate these fatal defects and adapt to the market demand for energy density is critical. Hence, SiO material with TiON phase modification has been prepared by simple, low-cost, and scalable ball milling and then combined with nitridation. Consequently, based on the TiON modified layer, which boosts high ionic/electronic conductivity, chemical stability, and excellent mechanical properties, the SiO@TON-10 electrode shows highly stable lithium-ion storage performance for lithium-ion half/full batteries due to a stable solid-electrolyte interface layer, fast Li transport channel, and alleviative volumetric expansion, further verifying its practical feasibility and universal applicability.