sulfates, produce higher voltage than oxides due to the inductive effect of the polyanion. [15] In 1996, Akshaya Padhi, John Goodenough and coworkers identified the lithium iron phosphate (LiFePO 4 ) and other phospho-olivines (lithium metal phosphates with olivine-structure) as cathode material for lithium ion batteries. [16] Owing to its tremendous superiority over