α-MnO2/MWCNTs as an electrocatalyst for rechargeable relatively closed system Li-O2 batteries.

Herein, a new, relatively closed system Li-O2 (RCLO) battery, without extra oxygen being involved in the reaction during the charge and discharge process, is reported. This relatively closed system effectively solves the key issue of poor circulation caused by oxygen generation in conventional Li-O2 batteries.

3D spongy nanofiber structure Fe-NC catalysts built by a graphene regulated electrospinning method.

3D spongy nanofiber structure Fe-NC catalysts were constructed by a graphene regulated electrospinning method. The framework of the catalysts was reconstructed into carbon nanotubes, mesopores and macropores, and most of the Fe3C is converted to Fe2N during the calcination process. All catalysts showed better electrocatalytic performances than commercial Pt/C.