Improving the high initial coulombic efficiency of manganese oxide anodes: a strategy for in situ construction of an interface of metal–organic framework-derived oxide nanoparticles

Abstract

Manganese oxides possess extensive application prospects due to their low cost, high theoretical capacity, and multiple valence states. Nevertheless, the application of manganese oxides as anode materials for lithium -ion batteries is restricted by their low initial coulombic efficiency (ICE). To address this issue, we employed the metal–organic framework (MOF) derivation method to introduce nano-metal oxide particles in situ on the surface of manganese oxides. The presence of nano-metal oxides diminished the formation of the solid electrolyte interphase (SEI) film, leading to the material exhibiting an ICE of up to 87.5%. Additionally, it decreased the charge transfer resistance, increased the pseudocapacitive contribution, and led to enhanced reversibility and reaction kinetics. This approach provides a novel strategy for the surface modification of manganese oxides and for enhancing the ICE of manganese oxides.