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Preparation and Properties of Carbon Coated Spherical Mn3O4 Composites as an Anode Material for Lithium-Ion Batteries

In this paper, carbon coated spherical Mn3O4 was prepared by decomposition of spherical MnCO3 and sucrose. The results of XRD and SEM showed that Mn3O4/C composites are sphere-like with good crystallinity, and its diameter is about 1um. It could deliver a reversible charge capacity of 848.7 mA h g-1 at the current density of 162.3 mA g-1, and the specific discharge capacity is still have 441 mA h g-1 at a high current density of 649.4 mA g-1 exhabiting good rate performance. The excellent performance of the spherical Mn3O4/C composites could be attributed to its unique architecture which provides fast lithium ion and electron transportation as well as accommodates the large volume change of transition metal oxides during conversion reactions.