LiNi0.50Co0.25Mn0.25O2　thin　film　cathodes　are　successfully　prepared　by　pulsed　laser　deposition　technique　with　post-annealing　treatment.　The　microstructure　of　the　thin　films　is　characterized　by　X-ray　diffraction,　environmental　scanning　electron　microscopy,　X-ray　photoelectron　spectroscopy　and　atomic　force　microscopy.　The　electrochemical　performance　of　the　thin　film　electrodes　is　evaluated　by　cyclic　voltammetry　and　charge-discharge　cycling　tests.　LiNi0.50Co0.25Mn0.25O2　thin　film　electrodes　deliver　good　electrochemical　performance.　The　initial　discharge　capacity　of　the　thin　film　electrodes　is　122　mAhg(-1)　measured　at　a　rate　of　0.5C　in　the　voltage　range　of　2.8-4.3　V.　The　coulombic　efficiency　is　beyond　94%　in　addition　to　the　first　charge-discharge　cycle.　The　chemical　diffusion　coefficients　of　lithium　ions　in　the　thin　film　electrodes　are　in　the　range　of　10(-11)　-　10(-13)　cm(2)s(-1)　determined　by　galvanostatic　intermittent　titration　technique　(GITT)　method.