Synthesis and Energy Storage Characteristics of Mno Microchains Induced by High Magnetic Field

Abstract

A magnetic field induced hydrothermal method is applied to synthesize precursors, followed by annealing to prepare mesoporous MnO microchains. Different morphologies of the ultimate products t can be dominated by changing the magnetic field strength to acquire good electrochemical performances. The initial high reversible capacity of MnO microchains is 948 mAh g -1 . After 250 cycles, the reversible capacity retains about 769 mAh g -1 at 2C, even after 2000 cycles, the reversible capacity maintains around 198 mAh g -1 at 8C. The superb electrochemical property could originate from the mesoporosity of aggregated nanoparticles of the MnO 1D-microchain structure, which is beneficial for the fast transport of Li + and electron, and can adapt to the dramatic volume change during the Li + deintercalation, thus effectively improving the electrochemical energy storage characteristics.

Keywords: High magnetic field, MnO, Anode, Microchains