Rational design of electrochemically active polymorphic MnOx/rGO composites for Li+-rechargeable battery electrodes

Abstract

Electrochemical behavior of different MnOx @reduced graphene oxide (rGO) composites derived from a MnO2/GO template are thoroughly investigated. As-prepared MnO2/GO mixture is gradually converted to MnO2/rGO and finally to Mn3O4/rGO composites under controlled post annealing conditions. The semispherical Mn3O4 crystalline compound anchored composite exhibits stable electrode performances, including both the Li+ anode and the Li+-air cathode catalyst, induced by the electrochemically favorable composite with an effective large contact area between the active materials and the electronic conductive rGO. It is such a meaningful to suggest the facile and controllable synthetic procedures for obtaining Li-rechargeable electrodes with a MnOx nanoparticle-incorporated composites for the highly reactive lithiation/delithiation electrochemical reactions.