Na3V2(PO4)3　is　considered　as　one　of　the　most　promising　cathodes　for　sodium　ion　batteries　owing　to　its　fast　Na+　diffusion,　good　structural　stability　and　high　working　potential.　However,　its　practical　application　is　limited　by　its　low　intrinsic　electronic　conductivity.　Herein,　a　carbon　coated　Cu2+-doped　Na3V2(PO4)3　cathode　was　prepared.　The　carbon　coating　not　only　improve　its　apparent　conductivity,　but　also　inhibit　crystal　growth　and　prevent　agglomeration　of　particles.　Moreover,　Cu2+　doping　contributes　to　an　enhanced　intrinsic　conductivity　and　decreased　Na+　diffusion　energy　barrier,　remarkably　boosting　its　charge　transfer　kinetics.　Based　on　the　structure　characterizations,　electrochemical　performances　tests,　charge　transfer　kinetics　analyses　and　theoretical　calculations,　it＇s　proved　that　such　an　elaborate　design　ensures　the　excellent　rate　performances　(116.9　mA　h　g−1　at　0.1C;　92.6　mA　h　g−1　at　10C)　and　distinguished　cycling　lifespan　(95.8　%　retention　after　300　cycles　at　1C;　84.8　%　retention　after　3300　cycles　at　10C).　Besides,　a　two-phase　reaction　mechanism　is　also　confirmed　via　in-situ　XRD.　This　research　is　expected　to　promote　the　development　of　Na3V2(PO4)3-based　sodium　ion　batteries　with　high　energy/power　density　and　excellent　cycling　lifespan.　©　2024　Elsevier　Inc.