Synthesis of hierarchical spindle-like Mn2O3 for lithium ion batteries with enhanced lithium storage properties

摘要

Hierarchical spindle-like Mn2O3 has been synthesized through a facile hydrothermal procedure without any hard template followed by thermal annealing in air at 600 degrees C for 2 h. When served as anode material for lithium-ion batteries, the Mn2O3 anode could maintain a reversible capacity as high as 993.1 mAh g(-1) at a current density of 400 mA g(-1) after 180 cycles. Moreover, it also shows excellent long cyclability, maintaining a reversible capacity of 823.8 mAh g(-1) at a high current density of 800 mA after 390 cycles. The superior electrochemical performances of the spindle-like Mn2O3 anode should be attributed to the unique nanostructure, wherein the nanoparticles can buffer large volume change during longterm cycling process and provide shorter diffusion pathways for lithium ions and electrons on electrode. In addition, the porous surface can enhance effective contact with electrolyte. (C) 2017 Elsevier B.V. All rights reserved.