Micropore engineering on hollow nanospheres for ultra-stable sodium-selenium batteries

Tailoring controllable pores types, diameter size and heteroatom doping on hollow carbon spheres to obtaining the suitable carbon-hosting, which found that of Se-loading content was up to 58% by using vapor-infiltration method, achieved a high initial capacity of 652 mA h g−1 at 0.1 C and an astonish long-cycling ability of 224.9 mA h g−1 at 5 C after 6,000 loops.