Sodium　vanadium　fluorophosphate　(Na3V2O2(PO4)(2)F),　which　has　a　high　theoretical　capacity　and　operation　voltage,　is　a　promising　cathode　material　for　sodium　ion　batteries.　However,　its　application　is　hindered　by　the　expensive　conventional　synthetic　methods,　long　synthesis　time,　and　high　synthesis　temperature.　In　this　study,　we　developed　a　microfluidics-based　continuous-flow　strategy　for　the　rapid　and　controllable　synthesis　of　ordered　monodispersed　Na3V2O2(PO4)(2)F　nanospheres　and　nanosheets.　Nanospheres　were　synthesized　within　a　short　reaction　time　of　6.3　s　and　exhibited　an　excellent　rate　capability　of　114.0　mAh　g(-1)　at　10　C.　Nanosheets　exhibited　outstanding　cycle　stability　of　106.1　mAh　g(-1)　at　10　C　and　capacity　retention　of　97.3%　after　1000　cycles.　This　work　paves　the　way　for　low-cost,　rapid,　and　large-scale　preparation　of　electrode　materials　for　rechargeable　batteries.　(c)　2021　Elsevier　Ltd.　All　rights　reserved.