Laser-induced MnO/Mn3O4/N-doped-graphene hybrid as binder-free anodes for lithium ion batteries

Abstract

Rational design and scalable construction of unique three-dimensional structures with high electronic conductivity and small volume changes upon repeated cycles are challenging. Here, laser-induced MnO/Mn3O4/N-doped-graphene (MNLIG) hybrid frameworks as binder-free anodes are firstly demonstrated for Li-ion batteries. The one-step laser scribing technique is applied to produce MNLIG hybrids in-situ anchored on Cu current collectors, which is facile and controllable. It is shown that the resultant MNLIG composites perform exceptionally well as Li-ion batteries anode, specifically, a high reversible capacity of 992 mAh g−1 at 0.2 A g−1 and excellent rate capacity of 365 mAh g−1 at 2.0 A g−1, as well as a high cycling stability (699 mAh g−1 after 400 cycles at 0.2 A g−1) were achieved. It’s proposed that the homogeneous distribution of MnO/Mn3O4 nanoparticles on surfaces of nitrogen-doped graphene (NLIG) as well as the dense architecture account for excellent electrochemical performances of as-designed framework electrodes. The laser scribing method enable quick fabrication of graphene-based hybrid frameworks directly anchored on current collectors, which can also scale up and holds promising application prospect in energy storage.