Sk on Co., Ltd.

Sk Innovation Co., Ltd.

In Haeng Cho

Myoung Lae Kim

Dong Gun Lee

Sung Yon Oh

Joo Hyun Lee

Hyo Shin Kwak

Dai In Park

Jin Haek Yang

Sung Jin Kim

Young Hoon Do

Yoon Ji Lee

Jung Hwan Kim

Yu Na Shim

Phal Jin Lee

Yong Hyun Cho

Jong Hyuk Lee

Sang Han Lee

Jin Hong Lee

Jong Hye Han

Hoi Jin Jeong

Dong Wook Ha

Su Hee Han

Chan Woo Kim

Provided is a lithium secondary battery, and the lithium secondary battery of the present invention includes: a positive electrode including a first lithium-metal oxide including secondary particles formed by aggregating primary particles having a particle diameter of 2 μm or less and a second lithium-metal oxide including nickel and at least one or more metals selected from the group consisting of manganese (Mn) and cobalt (Co) and including particles having a primary particle diameter of 2 μm or more; a negative electrode; a separator interposed between the positive electrode and the negative electrode; and an electrolyte, wherein the electrolyte includes a lithium salt, a nonaqueous organic solvent, and a difluorophosphite compound containing at least one or more difluorophosphite groups.

Lithium secondary battery

An electrolyte for a lithium secondary battery according to embodiments of the present invention includes an organic solvent, a lithium salt, and an additive including a succinic anhydride-based compound substituted with a trialkoxysilyl alkyl group. A lithium secondary battery including the electrolyte provides enhanced cycle property and high temperature stability.

Electrolyte for lithium secondary battery and lithium secondary battery including the same

A cathode for a lithium secondary battery includes a cathode current collector, and a cathode active material layer on the cathode current collector. The cathode active material layer includes a plurality of a lithium-metal oxide particle that has a shape of a single particle. An activation energy (Ea) of the cathode is in a range from 50 kJ/mol to 80 kJ/mol.

Method of preparing cathode active material, cathode for lithium secondary battery and lithium secondary battery

An electrolyte for a lithium secondary battery according to exemplary embodiments of the present inventing includes an organic solvent, a lithium salt, a first additive represented by a predetermined chemical formula, and a second additive represented by a predetermined chemical formula. A protective film is formed by the additives to suppress an expansion of a lithium secondary battery and improve storage property at high temperature.

Provided are an electrolyte for a secondary battery including a lithium salt, a nonaqueous organic solvent, and a cyclic fluorophosphonate compound, and a lithium secondary battery including the same.

An electrolyte solution for a lithium secondary battery includes an organic solvent, a lithium salt, and a pentaerythritol diphosphite-based compound including at least one substituent selected from the group consisting of a silyl group, a sulfonyl group, a phosphoryl group and a phosphino group. A lithium secondary including the electrolyte solution is provided.

Electrolyte solution for lithium secondary battery and lithium secondary battery including the same

Provided is a lithium secondary battery comprising: a cathode comprising a cathode active material, an anode comprising an anode active material, a separator interposed between the cathode and the anode, and an electrolyte for a secondary battery, wherein the cathode active material is Li(NiCoMn)O, wherein 0.90≤x≤1.10, 0.5≤a≤0.99, 0.005≤b<0.5, 0.005≤c<0.5, and a+b+c=1, and the electrolyte for a secondary battery comprises a lithium salt, a nonaqueous organic solvent, and a cyclic phosphate compound represented by the following Chemical Formula 2: wherein Rto Rand R' and R″ are independently of one another hydrogen or C-Calkyl; Lis —CRR—; and Rand Rare independently of each other C-Calkyl .

Provided is a lithium secondary battery, and the lithium secondary battery of the present invention includes: a positive electrode including a first lithium-metal oxide including secondary particles formed by aggregating primary particles having a particle diameter of 2 &#x3bc;m or less and a second lithium-metal oxide including nickel and at least one or more metals selected from the group consisting of manganese (Mn) and cobalt (Co) and including particles having a primary particle diameter of 2 &#x3bc;m or more; a negative electrode; a separator interposed between the positive electrode and the negative electrode; and an electrolyte, wherein the electrolyte includes a lithium salt, a nonaqueous organic solvent, and a difluorophosphite compound containing at least one or more difluorophosphite groups.

Provided is a lithium secondary battery including an anode including a silicon-based anode active material; a cathode; and an electrolyte, the electrolyte including a lithium salt, a non-aqueous organic solvent, and a conjugated diene compound.

Provided are an electrolyte for a secondary battery including a lithium salt, a nonaqueous organic solvent, and a bisfluorophosphite multicyclic compound, and a lithium secondary battery including the electrolyte.

Electrolyte for secondary battery and lithium secondary battery including the same

Provided are an electrolyte for a secondary battery including a lithium salt, a nonaqueous organic solvent, and a difluorophosphite olefin compound, and a lithium secondary battery including the same.

Provided is an electrolyte for a secondary battery including a lithium salt, a nonaqueous organic solvent, and a cyclic phosphate compound represented by the following Chemical Formula 2: wherein Rto Rand R' and R&#x2033; are independently of one another hydrogen or C1-C7 alkyl; Lis &#x2014;(CRR)&#x2014;; Rand Rare independently of each other hydrogen or C1-C7 alkyl; and n is an integer of 1 to 3. Also provided is a lithium secondary battery including the electrolyte.

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Daejeon, South Korea

In Haeng Cho