Binder-free　porous　Si/Cu　architecture　with　the　unique　Cu　walls　wrapped　Si/Cu　porous　network　as　lithium-ion　battery　anode　was　fabricated　by　laser　remelting,　diffusion　bonding　and　dealloying　processes.　The　porous　network　had　enough　space　to　allow　for　the　large　expansion　of　Si　during　lithation.　The　Cu　walls　and　Cu　skeletons　could　prevent　loss　of　electrical　contact　between　pulverized　Si　and　current　collector.　The　laser　remelting　influenced　the　Cu　diffusion　behavior　during　diffusion　bonding,　and　was　the　most　critical　process　for　the　fabrication　of　porous　Si/Cu　architecture.　(C)　2017　Acta　Materialia　Inc.　Published　by　Elsevier　Ltd.　All　rights　reserved.