Lg Chem, Ltd

Lg Energy Solution, Ltd.

Shul Kee Kim

Chul Haeng Lee

Young Min Lim

Doo Kyung Yang

Gwang Yeon Kim

Sung Hoon Yu

Kyung Mi Lee

Yoo Sun Kang

Hyun Yeong Lee

Yu Ha An

Ha Eun Kim

Chui Haeng Lee

Jin Hyun Park

A non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same are disclosed herein. In some embodiments, and particularly, to a non-aqueous electrolyte solution includes a lithium salt, an organic solvent, a first additive, and a second additive, wherein the first additive is a compound represented by Formula 1 and the second additive is a compound represented by Formula 2.

Non-aqueous electrolyte solution for lithium secondary battery and lithium secondary battery including the same

The present invention provides a lithium secondary battery comprising a non-aqueous liquid electrolyte comprising lithium bis(fluorosulfonyl)imide (LiFSI) and a fluorinated benzene-based compound as additives, a positive electrode comprising a lithium-nickel-manganese-cobalt-based oxide as a positive electrode active material, a negative electrode, and a separator. With the non-aqueous liquid electrolyte for a lithium secondary battery of the present invention, a solid SEI film is formed on a negative electrode when initially charging a lithium secondary battery comprising the non-aqueous liquid electrolyte, and an output property of the lithium secondary battery is improved, and an output property and stability after high temperature storage are capable of being enhanced as well.

Non-aqueous liquid electrolyte and lithium secondary battery comprising the same

The present invention relates to an additive for a non-aqueous electrolyte solution, which may suppress the generation of metallic foreign matter causing a side effect in a battery while forming a stable film on the surface of an electrode, a non-aqueous electrolyte solution for a lithium secondary battery which includes the additive, and a lithium secondary battery including the non-aqueous electrolyte solution.

Alkynyl-containing compound additive for non-aqueous electrolyte solution, and non-aqueous electrolyte solution for lithium secondary battery and lithium secondary battery which include the same

The present invention relates to a non-aqueous electrolyte solution for a lithium secondary battery, which includes a compound capable of suppressing an electrolyte solution side reaction in a high-temperature and high-voltage environment, and a lithium secondary battery in which cycle characteristics and stability are improved even during high-temperature and high-voltage charging by including the same.

Non-aqueous electrolyte solution and lithium secondary battery including the same

The present invention relates to a lithium secondary battery comprising a non-aqueous liquid electrolyte comprising lithium bis(fluorosulfonyl)imide (LiFSI) and a fluorinated ether compound as additives, a positive electrode comprising a lithium-nickel-manganese-cobalt-based oxide as a positive electrode active material, a negative electrode and a separator. According to a non-aqueous liquid electrolyte for a lithium secondary battery of the present invention, a rigid SEI layer may be formed at a negative electrode during the initial charging of the lithium secondary battery comprising the same, the output properties of the lithium secondary battery may be improved, and the output properties after storing at high temperature and capacity properties may be increased.

The present invention relates to a lithium secondary battery comprising a non-aqueous electrolyte solution comprising lithium bis(fluorosulfonyl)imide (LiFSI) and a phosphazene compound as additives, a positive electrode comprising a lithium-nickel-manganese-cobalt-based oxide as a positive electrode active material, a negative electrode and a separator. According to a non-aqueous electrolyte solution for a lithium secondary battery of the present invention, a rigid SEI layer may be formed at a negative electrode during the initial charging of the lithium secondary battery comprising the same, the output properties of the lithium secondary battery may be improved, and the output properties after storing at high temperature and capacity properties may be increased.

Non-aqueous electrolyte solution and lithium secondary battery comprising the same

Provided are a non-aqueous electrolyte solution, which includes a non-aqueous organic solvent including propylene carbonate (PC) and ethylene carbonate (EC), and lithium bis(fluorosulfonyl)imide (LiFSI), and a lithium secondary battery including the non-aqueous electrolyte solution. The lithium secondary battery of the present invention may improve low-temperature and room temperature output characteristics, high-temperature and room temperature cycle characteristics, and capacity characteristics after high-temperature storage by forming a robust solid electrolyte interface (SEI) on an anode during initial charge of the lithium secondary battery.

Provided are a non-aqueous electrolyte solution, which includes a non-aqueous organic solvent including propylene carbonate (PC) and an ester-based solvent, and lithium bis(fluorosulfonyl)imide (LiFSI), and a lithium secondary battery including the non-aqueous electrolyte solution. According to the non-aqueous electrolyte solution of the present invention, since a robust solid electrolyte interface (SEI) may be formed on an anode during initial charge of a lithium secondary battery including the non-aqueous electrolyte solution, high-temperature cycle characteristics and capacity characteristics after high-temperature storage as well as low-temperature, room temperature, and high-temperature output characteristics may be simultaneously improved.

Provided is a non-aqueous electrolyte solution including a non-aqueous organic solvent, an imide-based lithium salt, and at least one additive selected from the group consisting of lithium difluoro bis(oxalato)phosphate (LiDFOP), (trimethylsilyl)propyl phosphate (TMSPa), 1,3-propene sultone (PRS), and ethylene sulfate (ESa), as an electrolyte solution additive. According to the electrolyte solution additive for a lithium secondary battery of the present invention, the electrolyte solution additive may improve output characteristics at high and low temperatures and may prevent a swelling phenomenon by suppressing the decomposition of PFon the surface of a cathode, which may occur during a high-temperature cycle of a lithium secondary battery including the electrolyte solution additive, and preventing an oxidation reaction of an electrolyte solution.

Growing community of inventors

Daejeon, South Korea

Shul Kee Kim