Nano-sized　Li1.26Fe0.22Mn0.52O2　(LFMO)　cathode　material　coated　with　conducting　polypyrrole　(PPy)　was　successfully　synthesized　by　simple　chemical　oxidative　polymerization.　The　crystal　structure　of　the　sample　was　examined　by　X-ray　diffraction　(XRD),　and　the　morphology　and　micro-structure　were　observed　by　scanning　electron　microscopy　(SEM)　and　transmission　electron　microscopy　(TEM).　The　elemental　mapping　and　Fourier　transform　infrared　spectrometer　results　demonstrated　that　the　conductive　network　of　PPy　was　present　in　the　composites　and　PPy　was　uniformly　distributed　on　the　LFMO　particles.　The　electrochemical　properties　of　all　of　the　samples　were　investigated　by　galvanostatic　charge-discharge　test　and　electrochemical　impedance　spectroscopy　(EIS)　analysis,　which　showed　that　the　PPy　on　the　surface　significantly　decreased　the　charge-transfer　resistance　of　LFMO.　LFMO　coated　with　mass　ratio　of　2%　PPy　(LFMO-2%PPy)　exhibited　excellent　rate　performance　and　good　cycle　stability.　The　initial　discharge　capacity　was　206　mAh.g(-1)　at　the　1C　rate,　and　the　initial　coulombic　efficiency　was　87%.　After　50　cycles　at　1C　and　2C,　the　capacity　stabilized　at　131　and　139　mAh.g(-1),　respectively.