Poly-anion based materials such as phosphates, silicates, fluorophosphates/fluorosulfates and borates have been proposed as promising cathodes for Li rechargeable batteries. The variety of combinations between poly-anions and transition metals (TMs) enables intellectual tuning of electrochemical properties of this class of materials. It has been demonstrated that Li intercalation potentials (inductive effect), i storage capacity (variety of crystal structures and molecular weight of poly-anions), thermal stability (oxygen chemical potential) and other factors are critically dependent on the species of poly-anion.In this presentation, two examples of poly-anion based cathode materials for lithium rechargeable batteries; lithium metal borates and lithium metal silicates, will be discussed.

First principles study on polymorphism and the phase transformation of lithium metal poly-anion compound for lithium rechargeable batteries

244th National Meeting (2012)

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