Scavenging　various　waste　mechanical　energy　and　generating　clean　electricity,　piezoceramic　energy　harvester　(PEH)　has　attracted　widespread　attention.　Despite　the　great　progress,　the　weak　output　current　density　is　still　the　main　obstacle　limiting　its　application.　Here,　to　overcome　it,　new　multilayer　piezoceramics　(ML)　with　a　three-dimensional　embedded　electrode　were　designed　and　fabricated　relying　on　Pb(Zn1/3Nb2/3)0.2(Zr1/2Ti1/2)0.8O3　(PZNZT)　with　intrinsic　low-fire　properties.　By　creating　the　multiple　electrode　interface　in　the　ML　body,　the　total　amount　of　surface　polarization　charges　is　greatly　improved,　which　in　turn　brings　about　a　huge　increase　of　the　piezoelectric　coefficient.　The　ML　ceramic　exhibits　a　high　and　stable　piezoelectric　coefficient　(d33　=　1299　±　15%　pC/N)　at　25　–　150　°C,　matching　that　of　the　relaxor-PbTiO3　crystals.　More　encouragingly,　the　ML-PEH　in　cantilever　configuration　generates　extremely　high　short-circuit　current　density　of　254　μA/cm2,　far　beyond　that　of　the　reported　PEHs.　It　can　charge　a　10　mF　capacitor　from　0　V　to　3　V　in　6.4　min,　and　the　corresponding　average　charge　rate　of　0.35　V·min−1·cm−2　is　3.6　times　that　of　single-layer　PEH.　Benefiting　from　the　tightly　bound　heterolayer　interface,　ML-PEH　also　exhibits　excellent　high　temperature/fatigue　resistance.　This　work　will　facilitate　the　development　of　advanced　PEHs　with　high　current　density　and　improve　their　utility.　©　2022　Elsevier　Ltd