Utilizing　an　interfacial　layer　to　stabilize　Zn-metal　anodes　has　been　extensively　explored,　often　accompanied　by　inhibition　of　Zn　dendrites.　However,　most　interfacial　layers　primarily　delay　Zn2+　ion　transport/transfer,　leading　to　slow　Zn　deposition　due　to　the　ion　kinetics　hindrance.　Basically,　this　ionic　hysteresis　effect　is　inherent　to　all　interfacial　layers　and　will　cause　unstable　Zn　deposition　over　extended　cycling　periods.　Here,　we　present　a　simple　composite　interfacial　layer　composed　of　graphene　acid　(GA)　and　cellulose　nanofibers　(CNFs).　In　the　CNF/GA　layer,　a　delicate　balance　between　the　rapid　Zn2+　transport/transfer　and　uniform　Zn　deposition　is　achieved.　The　presence　of　GA　not　only　demonstrates　excellent　ion　selectivity　and　suppresses　corrosion　reactions,　but　also　promotes　Zn2+　transport/transfer,　significantly　reducing　the　desolvation　energy　of　Zn2+　ions.　Consequently,　the　symmetric　cell　with　CNF/GA　coatings　achieves　a　highly　stable　cycling　life　of　2920　h,　surpassing　previous　reports　using　graphene-based　and　CNF-based　protecting　layers.　Moreover,　the　full　cell　based　on　the　CNF/GA　protected　anodes　exhibits　excellent　long-term　stability　and　maintains　an　ultra-stable　self-discharge　retention　of　99%　after　24　h　of　standing.　These　findings　provide　valuable　insights　for　the　development　of　protective　layers　for　Zn-metal　anodes　and　future　grid-scale　Zn　battery　deployment.　©　2024　The　Royal　Society　of　Chemistry