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.

Preparation of novel two-stage structure MnO micrometer particles as lithium-ion battery anode materials.

MnO micrometer particles with a two-stage structure (composed of mass nanoparticles) were produced via a one-step hydrothermal method using histidine and potassium permanganate (KMnO4) as reagents, with subsequent calcination in a nitrogen (N2) atmosphere. When the MnO micrometer particles were utilized in lithium-ion batteries (LIBs) as anode materials, the electrode showed a high reversible specific capacity of 747 mA h g-1 at 100 mA g-1 after 100 cycles, meanwhile, the electrode presented excellent rate capability at various current densities from 100 to 2000 mA g-1 (∼203 mA h g-1 at 2000 mA g-1). This study developed a new approach to prepare two-stage structure micrometer MnO particles and the sample can be a promising anode material for lithium-ion batteries.