NOVELTY - The electrode (16) has coated lithium metal oxide particles whose surfaces comprise a coating containing lithium phosphate and a lithium-metal-polyanionic material comprising lithium cation, metal cation and polyvalent metal-free anion. The lithium metal oxide particles comprise a spinel-type structure and a layered-type structure, and comprises fluoride ions. The lithium-metal-polyanionic material is a lithium-ion conductor that operates at or above voltage selected from a group consisting of 4 V, 4.5 V, and 5 V versus metallic lithium.    USE - Surface protected lithium-metal-oxide electrode i.e. cathode, for use in a non-aqueous electrochemical lithium-ion cell and battery utilized in various high power applications. Uses include but are not limited to a portable electronic appliance and medical device, transportation device, aerospace application, defense application, cell phone, laptop computer, power tool, hybrid-vehicle, plug-in hybrid vehicle and all-electric vehicle.    ADVANTAGE - The electrode particles are coated with colloidal aluminum oxide or Zirconium dioxide particles or with aluminum phosphate such that the coating impede lithium diffusion in and out of a layered electrode structure during electrochemical discharge and charge, thus protecting intrinsic capacity of the electrode from decay, and hence improving an overall performance and safety of lithium-ion cells while enhancing surface stability, rate capability and cycling stability of the lithium-metal-oxide electrodes to stabilize cubic-close-packed layered and spinel lithium-metal-oxide structures.    DETAILED DESCRIPTION - The lithium-metal-polyanionic material is amorphous or poorly crystalline and olivine material, and comprises a stoichiometric structure, a cation-deficient structure and an anion-deficient structure.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross sectional view of a non-aqueous electrochemical lithium-ion cell and a battery.    Non-aqueous lithium-ion cell (10)    Negative electrode (12)    Electrolyte (14)    Surface protected lithium-metal-oxide electrode (16)    Insulating housing (18)