Synthesis of MnCO₃/Multiwalled Carbon Nanotube Composite as Anode Material for Lithium-Ion Batteries

A MnCO₃ /Multiwalled carbon nanotube (MnCO₃/MWCNT) composite has been successfully fabricated by an in-suit hydrothermal method. When the MnCO₃/MWCNT composite is applied as anode materials in lithium-ion batteries (LIBs), the electrodes exhibit a reversible capacity of 645 mA h g_-1 at 100 mA g_-1 after 80 cycles, reaching an initial coulombic efficiency (CE) of up to 60.6%. Furthermore, the as-prepared MnCO₃/MWCNT composite displays more excellent rate performances than the pure multiwalled carbon nanotube (MWCNT) and pure MnCO₃ particles. The reason is that the MnCO₃ particles can be effectively connected by the MWCNT, thus enhancing the electrochemical performance of the MnCO₃/MWCNT composite.