Stability electrochemical performance of self-assembled hierarchical MnCO3/MWCNT nanocomposite as anode material for lithium-ion batteries

The self-assembled hierarchical MnCO 3 /MWCNT nanoarchitectures are prepared by a facile solvothermal method and used as anode material for lithium-ion batteries. The results of SEM and TEM show that the hierarchical nanorods are made of the primary MnCO 3 nanocrystals. The hierarchical nanorods MnCO 3 are heterogeneously distributed among retiform MWCNTs. Those MnCO 3 /MWCNT nanoarchitectures are able to buffer the physical aggregation of the MnCO 3 nanorods and volume expansion of MnCO 3 in the charge/discharge process. The self-assembled hierarchical MnCO 3 /MWCNT nanocomposite delivers a reversible capacity of 704 mAh g −1 after 110 cycles at a current density of 100 mA g −1 . The excellent electrochemical performance is attributed to the self-assembled hierarchical MnCO 3 /MWCNT nanoarchitectures and the high conductivity of MWCNTs.