Negative active material including manganese oxides, negative electrode including the same, lithium battery including negative electrode and method of preparing negative active material

A negative active material comprising:

• a carbonaceous conductive material;
• where the carbonaceous conductive material is selected from the group consisting of carbon black, acetylene black, carbon fibers, carbon nanotubes;
• and
• an ordered porous manganese oxide, wherein the ordered porous manganese oxide comprises at least one of MnO, Mn2O3, and Mn3O4, wherein pores of the ordered porous manganese oxide have a first peak in a range of about 1 nm to about 5 nm and a second peak in a range of about 10 nm to about 20 nm,
• wherein the negative active material has a discharge capacity per unit weight of 800 mAh/g or greater, wherein the ordered porous manganese oxide has a pore volume in a range of about 0.1 cm3/g to about 2 cm3/g.