Synthesis and energy storage characteristics of MnO microchains induced by high magnetic field

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 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 2 C, even after 2000 cycles, the reversible capacity maintains around 198 mAh g -1 at 8 C. The superb electrochemical properties could originate from the mesoporosity of aggregated nanoparticles of the MnO 1D-microchain structure induced by applied magnetic field of 8 T, which is beneficial for the fast transport of Li + and electron, and can adapt to the dramatic volume change during the Li + deintercalation. • MnO microchains are prepared by magnetic-field-induced hydrothermal method followed by calcinating. • MnO microchains show superb stable cyclability and high rate capability. • This paper offers a facile method to prepare other metal oxide anode materials for LIBs.