A novel approach for synthesis of nanocrystalline γ-LiAlO2 from spent lithium-ion batteries

Synthesis of nanocrystallite γ-LiAlO₂ from spent lithium-ion batteries has been investigated. XRD results show that γ-LiAlO₂ phase can be synthesized by thermal treatment of the cathode material over its aluminum sheet at 800–900 °C for 2 h. This is accompanied with the formation of Co₃O₄ and CoO phases as colored powders. SEM investigation revealed the formation of dense grains as coconut-like shape structure of γ-LiAlO₂ phase. Comparatively, reaction of chemical grade Al powder with LiOH in stoichiometric ratio at 800 °C gives γ-LiAlO₂ phase of cotton-like morphology.