Boosting lithium storage of manganese oxides by integrating improved kinetics porous carbon coating and one-dimensional porous nanostructure

Abstract

Achievement of improvement in structural stability and electrochemical kinetics is crucial for developing advanced manganese oxide-based anodes for lithium-ion batteries. Herein, a MnxOy@PC composite composed of well-defined one-dimensional porous Mn3O4/MnO hybrid nanowires coated by a porous carbon layer is fabricated for the first time and hence this composite intelligently integrates the structural advantages of one-dimension, porous structure and improved kinetics carbon coating. As expected, the results demonstrate that the structural stability and electrochemical kinetics of the MnxOy are improved significantly by the well-designed structure integration strategy. Namely, the combinatorial architecture of one-dimensional porous nanostructure and porous conductive carbon coating contributes to not only superior structure stability but also enhanced electrochemical kinetics of MnxOy@PC. Consequently, the MnxOy@PC reveals outstanding lithium storage performance with a high capacity of 798.4 mAh g−1 after 200 cycles at 200 mA g−1 as well as 518.3 mAh g−1 after 500 cycles at 1000 mA g−1. This work may open an efficient pathway to boost the performance of other promising nanostructured metal oxide anodes for lithium-ion batteries.