Two-dimensional graphene-like MoSe nanosheets anchored on hollow carbon nanofibers as a cathode catalyst for rechargeable Li-O batteries

MoSe 2 @HCNF hybrids are synthesized via a facile hydrothermal method. The as-synthesized MoSe 2 @HCNF hybrids are used as the cathode catalyst of Li-O 2 batteries for the first time. The successful growth of MoSe 2 nanosheets on the surface of HCNF mitigates the agglomeration of MoSe 2 nanosheets and results in more edge sites exposed. And the electronic conductivity of the hybrids is enhanced by the combination of HCNF. Therefore, the MoSe 2 @HCNF hybrids exhibit superior catalytic activity, especially the OER catalytic activity for the charge process. The charge over-potential of the Li-O 2 batteries is greatly reduced, delivering a charge voltage platform of ∼3.69 V at 0.1 mA cm −2 , and the cycle performance is improved. According to this study, it can be expected that metal selenides have a great potential to be used as the cathode catalyst for Li-O 2 batteries. MoSe 2 @HCNF hybrids are used as the catalyst of Li-O 2 batteries and exhibit superior catalytic activity. The more catalytic active sites and the enhanced electronic conductivity make the MoSe 2 @HCNF hybrids exhibit improved catalytic activity.