LITHIUM SECONDARY BATTERY COMPRISING DISULFONATE ADDITIVE AND METHOD OF PREPARING THE SAME

• Main Authors: Seo Jinah, Koh Myongchun, Chung Yeonji, Park Hosang
• Format: Patent
• Language: English
• Published: 12.04.2018
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

A lithium secondary battery including a positive electrode including a positive active material represented by Formula 1; a negative electrode; and an electrolyte disposed between the positive electrode and the negative electrode, the electrolyte including a lithium salt; a nonaqueous solvent; and a cyclic compound represented by Formula 2, wherein an amount of the cyclic compound is less than about 2 percent by weight (wt%) based on a total weight of the electrolyte, €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ Formula 1€ƒ€ƒ€ƒ€ƒ€ƒLi x Ni y M 1-y O 2-z A z wherein, in Formulae 1 and 2, 0.9‰¤x‰¤1.2, 0.7‰¤y‰¤0.95, 0‰¤z<0.2, M includes Al, Mg, Mn, Co, Fe, Cr, V, Ti, Cu, B, Ca, Zn, Zr, Nb, Mo, Sr, Sb, W, Bi, or a combination thereof, A includes a monovalent anion, a divalent anion, a trivalent anion, or a combination thereof, and R 1 and R 2 are each independently a substituted or unsubstituted C 1 -C 30 alkylene group.