N-doped hollow porous carbon nanofibers (P-HCNFs) were prepared through pyrolyzation of hollow polypyrrole (PPy) nanofibers fabricated using electrospun polycaprolactone (PCL) nanofibers as a sacrificial template.
3D hierarchical MoSe2/N-doped carbon microsphere composites exhibit excellent rate capacities as anode materials in lithium-ion and sodium-ion batteries.