Anode, lithium battery including anode, and method of preparing anode

A lithium battery comprising:

• a cathode;
• an anode comprising
• a current collector,
• a first anode layer disposed on the current collector,
• a second anode layer disposed on the first anode layer, and
• an inorganic protection layer disposed on the second anode layer,
• wherein the first anode layer is between the current collector and the second anode layer,
• wherein the second anode layer comprises lithium metal or a lithium metal alloy and is between the first anode layer and the inorganic protection layer,
• wherein an oxidation/reduction potential of the first anode layer and an oxidation/reduction potential of the second anode layer are different from each other,
• wherein a thickness of the first anode layer is less than a thickness of the second anode layer;
• and
• an electrolyte between the cathode and the anode,
• wherein the thickness of the first anode layer is about 100 nanometers to about 2 micrometers, and the thickness of the second anode layer is about 1 micron to about 100 microns;
• and
• wherein the first anode layer comprises a lithium titanium oxide represented by Formula 1:
• Li4+aTi5−bMcO12−d Formula 1
• wherein, in Formula 1, −0.2<a<0.2, −0.3<b<0.3, 0<c<0.3, and −0.3<d<0.3;
• and M is at least one metal of Group 1 to 6, 8, and 12 to 15.