A novel approach for synthesis of nanocrystalline γ-LiAlO_2 from spent lithium-ion batteries

摘要

Synthesis of nanocrystallite γ-LiAlO_2 from spent lithium-ion batteries has been investigated. XRD results show that γ-LiAlO_2 phase can be synthesized by thermal treatment of the cathode material over its aluminum sheet at 800-900℃ for 2 h. This is accompanied with the formation of Co_3O_4 and CoO phases as colored powders. SEM investigation revealed the formation of dense grains as coconut-like shape structure of γ-LiAlO_2 phase. Comparatively, reaction of chemical grade Al powder with LiOH in stoichiometric ratio at 800℃ gives γ-LiAlO_2 phase of cotton-like morphology.