| abstract |
A lithium secondary battery including a cathode; an anode; and an electrolyte disposed between the cathode and the anode,n wherein the cathode includes a cathode active material represented by Formula 1, the electrolyte includes a lithium salt; a non-aqueous solvent; and a disilane compound represented by Formula 2, and wherein an amount of the disilane compound is about 5 percent by weight (wt %) or less, based on the total weight of the electrolyte: nn n n n n n n n n n n n wherein, in Formula 1 and 2, 0.95≤x≤1.2, 0.7≤y≤0.95, and 0≤z<0.2, M is aluminum, magnesium, manganese, cobalt, iron, chromium, vanadium, titanium, copper, boron, calcium, zinc, zirconium, niobium, molybdenum, strontium, antimony, tungsten, bismuth, or a combination thereof; and A is at least one anion having an oxidation number of −1 or −2. |