Sk on Co., Ltd.

Sk Innovation Co., Ltd.

Sung Yon Oh

In Haeng Cho

Jin Haek Yang

Dong Gun Lee

Myoung Lae Kim

Cheol Woo Kim

Yu Na Shim

Jin Sung Kim

Joo Hyun Lee

Hyo Shin Kwak

Kwang Kuk Lee

Dai In Park

Hyo Seung Park

Sang Hye Shin

Chanwoo Kim

Seong Il Lee

Su Hee Han

Ki Sung Park

Chan Woo Kim

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

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 secondary battery according to an exemplary embodiment includes a lithium salt, a non-aqueous organic solvent, and a silatrane-based compound represented by Chemical Formula 1. By including the electrolyte solution for a secondary battery according to an exemplary embodiment, a secondary battery can exhibit improved storage characteristics and improved capacity characteristics.

Electrolyte solution for secondary battery and 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 .

An electrolyte solution for a lithium secondary battery according to an embodiment of the present invention includes an organic solvent, a lithium salt, a compound represented by Chemical Formula 1, and a compound represented by Chemical Formula 2. A lithium secondary battery including the electrolyte solution and having improved low temperature and high temperature properties is provided.

Electrolyte solution for lithium 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 bisfluorophosphite multicyclic compound, and a lithium secondary battery including the electrolyte.

Electrolyte for secondary battery and 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.

Provided are a lithium secondary battery electrolyte and a lithium secondary battery. The lithium secondary battery electrolyte includes a lithium salt, a non-aqueous organic solvent, and a pyrrole derivative. The lithium secondary battery includes a cathode, an anode, a separator, and the lithium secondary battery electrolyte. The secondary battery electrolyte according to the present invention has advantages of excellent stability at a high temperature and high discharge capacity at a low temperature.

Lithium secondary battery electrolyte and lithium secondary battery including same

Provided are an electrolyte for a lithium secondary battery and a lithium secondary battery containing the same. The electrolyte for a secondary battery according to the present invention has excellent high-temperature stability, excellent low-temperature discharge capacity, and excellent life cycle characteristics.

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Daejeon, South Korea

Sung Yon Oh