Lithium battery

A lithium battery, comprising:

• a cathode;
• an anode,
• the anode comprising an anode active material, and the anode active material comprising a silicon compound, a silicon oxide of the formula SiOx1 wherein 0<x1<2, a carbon compound, a composite of a silicon compound and a carbon compound, or a combination thereof, wherein the silicon composite includes silicon particles with an average particle diameter of 10 nanometers to 200 nanometers;
• and
• an electrolyte between the cathode and the anode,
• wherein the electrolyte includes a lithium salt and a non-aqueous solvent including ethylene carbonate,
• wherein an amount of the ethylene carbonate, per 100 parts by volume of the non-aqueous solvent, is about 5 parts by volume to about 15 parts by volume,
• wherein the cathode includes a cathode active material represented by Formula 1,
• LixNiyM1-yO2-zAz Formula 1
• wherein, in Formula 1,
• 0.9≤x≤1.2, 0.7≤y≤0.98, and 0≤z≤0.2,
• M is Al, Mg, Mn, Co, Fe, Cr, V, Ti, Cu, B, Ca, Zn, Zr, Nb, Mo, Sr, Sb, W, Bi, or a combination thereof, and
• A is an element having an oxidation number of −1 or −2,
• wherein each element of M is independently present in an amount of 0<(1−y)≤0.12, wherein a total content of M is 0.02≤(1−y)≤0.12.

A lithium battery, comprising:

• a cathode;
• an anode;
• and
• an electrolyte between the cathode and the anode,
• wherein the electrolyte includes a lithium salt and a non-aqueous solvent including ethylene carbonate,
• wherein an amount of the ethylene carbonate, per 100 parts by volume of the non-aqueous solvent, is about 5 parts by volume to about 15 parts by volume, and
• wherein the cathode includes a cathode active material represented by Formula 1,
• LixNiyM1-yO2-zAz Formula 1
• wherein, in Formula 1,
• 0.9≤x≤1.2, 0.7≤y≤0.98, and 0≤z≤0.2,
• M is Al, Mg, Mn, Co, Fe, Cr, V, Ti, Cu, B, Ca, Zn, Zr, Nb, Mo, Sr, Sb, W, Bi, or a combination thereof, and
• A is an element having an oxidation number of −1 or −2,
• wherein each element of M is independently present in an amount of 0<(1−y)≤0.3, wherein a total content of M is 0.02≤(1−y)≤0.3,
• wherein the cathode has a current density of about 5.8 milliampere-hours per square centimeter to about 6.3 milliampere-hours per square centimeter,
• wherein the non-aqueous solvent further comprises dimethyl carbonate,
• wherein an amount of the dimethyl carbonate, per 100 parts by volume of the non-aqueous solvent, is about 55 parts by volume to about 80 parts by volume, and
• wherein the non-aqueous solvent further comprises an additive comprising fluoroethylene carbonate, and
• an amount of the fluoroethylene carbonate, per 100 parts by volume of the non-aqueous solvent, is about 1 part by volume to about 10 parts by volume.