Development　of　binder-free　electrode　materials　tightly　bonded　to　current　collector　effectively　improves　the　performance　of　energy　conversion　and　storage　devices.　In　this　letter,　we　report　the　fabrication　of　highly-dispersed　MnCO3　microspheres　directly　grown　out　of　a　laser　cladded　substrate　through　dealloying　process.　First,　laser　cladding　of　Cu　and　Mn　powder　mix　creates　a　layer　of　single-phase　Cu-Mn　alloy　on　a　stainless　steel　substrate.　Next,　during　dealloying,　Mn　is　preferentially　oxidized　on　the　surface　of　the　CuMn　alloy　layer　where　the　MnCO3　nuclei　instantaneously　form　and　subsequently　grow　into　hierarchical　microspheres.　The　high　dispersivity　of　MnCO3　microspheres　signifies　a　large　specific　surface　area,　which　is　highly　desirable　as　an　electrode　material.　Additionally,　our　unique　hybrid　fabrication　approach　eliminates　the　need　for　adhesive　between　the　electrode　material　and　its　supporting　substrate,　and　thus　minimizing　the　interface　resistance.　(C)　2016　Elsevier　B.V.　All　rights