NOVELTY - A lithium ion battery (100) comprises cathode (102) comprising cathode current collector (112) and cathode material layer (116) disposed on surface of cathode current collector, where the cathode active material comprises cathode active material particles and aluminum phosphate layers coated on surfaces of cathode active material particles; separator (106) comprising a porous membrane and a protective layer coated on a surface of porous membrane, an anode (104); and a nonaqueous electrolyte solution.    USE - As lithium ion battery (claimed), used in electric vehicles and portable electronic devices, such as mobile phones, digital cameras and notebook computers.    ADVANTAGE - The lithium ion battery does not have a burning phenomenon. Thus, the lithium ion battery has an excellent thermal stability and electrochemical stability due to the aluminum phosphate layers coating the surface of the cathode active material particles and the protective layer coating the separator.    DETAILED DESCRIPTION - A lithium ion battery (100) comprises a cathode (102) comprising a cathode current collector (112) and a cathode material layer (116) disposed on a surface of cathode current collector, where the cathode material layer comprises a cathode active material, a conductive agent, and an adhesive uniformly mixed together, where the cathode active material comprises cathode active material particles and aluminum phosphate layers coated on surfaces of cathode active material particles; a separator (106) comprising a porous membrane and a protective layer coated on a surface of the porous membrane, where the protective layer is configured to prevent the separator from being melted during charging or discharging of the lithium ion battery; an anode (104); and a nonaqueous electrolyte solution.    DESCRIPTION OF DRAWING(S) - The figure shows schematic view of lithium ion battery.    Lithium ion battery (100)    Cathode (102)    Anode (104)    Separator (106)    Cathode current collector (112)    Anode current collector (114)    Cathode material layers (116)    Anode material layers (118)