Si　has　been　extensively　investigated　as　an　anode　material　for　lithium-ion　batteries　because　of　its　superior　theoretical　capacity.　However,　a　scalable　fabrication　method　for　a　Si-based　anode　with　high　initial　coulombic　efficiency　(ICE)　and　large　volumetric　capacity　remains　a　critical　challenge.　Herein,　we　proposed　a　novel　porous　Si/Cu　anode　in　which　planar　Si　islands　were　embedded　in　the　porous　Cu　matrix　through　combined　laser　additive　manufacturing　and　chemical　dealloying.　The　compositions　and　dimensions　of　the　structure　were　controlled　by　metallurgical　and　chemical　reactions　during　comprehensive　interaction.　Such　a　structure　has　the　advantages　of　micro-sized　Si　and　porous　architecture.　The　planar　Si　islands　decreased　the　surface　area　and　thus　increased　ICE.　The　porous　Cu　matrix,　which　acted　as　both　an　adhesive-free　binder　and　a　conductive　network,　provided　enough　access　for　electrolyte　and　accommodated　volume　expansion.　The　anode　structure　was　well　maintained　without　observable　mechanical　damage　after　cycling,　demonstrating　the　high　structure　stability　and　integrity.　The　porous　Si/Cu　anode　showed　a　high　ICE　of　93.4%　and　an　initial　volumetric　capacity　of　2131　mAh　cm-3,　which　retained　1697　mAh　cm-3　after　100　cycles　at　0.20　mA　cm-2.　Furthermore,　the　full-cell　configuration　(porous　Si/Cu　//LiFePO4)　exhibited　a　high　energy　density　of　464.9　Wh　kg-1　and　a　capacity　retention　of　84.2%　after　100　cycles.