Iron　hexacyanoferrate　(FeHCF)　is　regarded　as　a　promising　cathode　material　of　sodium-ion　batteries　(SIBs)　due　to　the　merits　of　easy　preparation,　low　cost　and　three-dimensional　open　framework.　However,　the　practical　application　of　FeHCF　is　highly　restricted　by　the　intrinsic　[Fe(CN)6]4-　vacancy　and　coordinated　water　as　well　as　nanoscale　particles.　Herein,　sodium　citrate　is　introduced　to　mediate　the　drawbacks　of　FeHCF,　resulting　in　microscale　particles　with　less　water　content.　Accordingly,　the　modified　sample,　FeHCF-3,　achieved　the　performance　of　92　mA　h　g−1　at　100　mA　g−1　and　80　%　capacity　retention　after　300　cycles.　Furthermore,　an　optimal　iron　hexacyanoferrate　(FeHCF-H-2)　with　high-salt-concentration　preparation　is　designed　and　performs　a　good　reversibility　of　96　mA　h　g−1　after　700　cycles　at　100　mA　g−1.　Such　strategy　may　drive　the　application　of　high-tap,　low-defect　and　stable　cathode　for　SIBs.　©　2023　Elsevier　B.V.