Uniform　doping　has　been　recognized　as　an　effective　approach　to　improve　the　cycling　performance　of　many　layered　cathodes.　Herein,　we　propose　non-uniform　doping　as　a　more　effective　approach　to　enhance　the　cycling　stability　of　layered　cathodesviathe　precipitation　strengthening　mechanism.　In　this　work,　we　investigate　four　doped　(Cu,　Ti,　Mg,　and　Zn)　P2-layered　cathodes　for　sodium　ion　batteries　and　validate　that　cycling　induced　dopant　segregation　can　substantially　enhance　the　cyclability　due　to　mitigation　of　bulk　cracking.　Our　comprehensive　analysis　indicates　that　dopant　evolution　is　quite　diverse　during　electrochemical　cycling,　not　only　depending　on　the　nature　of　each　dopant　but　also　the　cycling　conditions　applied.　The　migration　and　segregation　behaviors　of　inactive　dopants　demonstrate　the　complex　dynamics　within　grain　bulk　during　battery　cycling,　which　also　offers　us　chances　to　engineer　the　physicochemical　properties　of　layered　cathodes.　Non-uniform　doping　opens　a　new　avenue　for　designing　battery　materials　with　superior　mechanical　properties.