Multi-component nano-oxide composite materials may present special synergistic effects as anode materials for lithium-ion batteries. Mesoporous β-MnO/MnO composite nanotubes are built here controlling the deoxidation process of carbon-coating to induce a partial phase transition of high valence manganese dioxides. Compared to single β-MnO nanotubes or MnO@C nanotubes, the mesoporous β-MnO/MnO@C composite nanotubes exhibit superior electrochemical properties. 679 mA h g of reversible specific capacity and 86% of capacity retention after 1000 cycles at 1 A g current density are obtained. The excellent performance is attributed to the unique multiple phase transitions regulation phenomena of manganese oxide occurring in the β-MnO/MnO composite material during the electrochemical processes, which significantly extends the cycle life of the β-MnO/MnO composite material.
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