Titles:
NON-AQUEOUS ELECTROLYTE FOR SECONDARY BATTERY AND SECONDARY BATTERY COMPRISING THE SAME
리튬 이차전지용 비수 전해액 및 이를 포함하는 리튬 이차전지
Abstracts:
The present invention provides a non-aqueous electrolyte for a lithium secondary battery capable of forming a solid SEI film, and a lithium secondary battery having improved battery performance by including the same. Specifically, the non-aqueous electrolyte for the secondary battery is a lithium salt; non-aqueous organic solvents; a first additive; and a second additive; including, as the first additive, an oligomer comprising a repeating unit derived from a monomer represented by Formula 1 and a repeating unit derived from a monomer represented by Formula 2, wherein the second additive is used as the second additive. It may include; at least one selected from the group consisting of a nitrile-based compound, a lithium salt compound, and a cyclic carbonate compound.
본 발명은 견고한 SEI 피막을 형성할 수 있는 리튬 이차전지용 비수 전해액 및 이를 포함함으로써 전지 성능이 개선된 리튬 이차전지를 제공한다. 구체적으로, 상기 이차전지용 비수 전해액은 리튬염; 비수성 유기용매; 제1 첨가제; 및 제2 첨가제;를 포함하고, 상기 제1 첨가제로 화학식 1로 표시되는 단량체로부터 유도된 반복단위 및 화학식 2 로 표시되는 단량체로부터 유도된 반복단위를 포함하는 올리고머를 포함하며, 상기 제2 첨가제로 니트릴계 화합물, 리튬염 화합물 및 환형 카보네이트 화합물로 이루어진 군으로부터 선택된 적어도 하나;를 포함할 수 있다.
Applicant:
LG ENERGY SOLUTION LTD [KR] (주식회사 엘지에너지솔루션)
Inventors:
JI SU HYEON (지수현)
LEE CHUL HAENG (이철행)
AHN KYOUNG HO (안경호)
KIM MIN JUNG (김민정)
PARK SOL JI (박솔지)
HAN JUN HYEOK (한준혁)
SHIN WON KYUNG (신원경)
LEE WON TAE (이원태)
Titles:
NONAQUEOUS ELECTROLYTIC SOLUTION AND NONAQUEOUS ELECTROLYTIC SOLUTION BATTERY
非水系電解液及び非水系電解液電池
Abstracts:
This nonaqueous electrolytic solution is for a nonaqueous electrolytic solution battery including a positive electrode and a negative electrode which are capable of occluding and releasing metal ions, and is characterized by comprising: an alkali metal salt; a nonaqueous solvent; a compound represented by general formula (A); and at least one of specific compounds represented by general formula (α) and specific compounds represented by general formula (β).
Titles:
Electrolytes, Anodes, Li-Ion Batteries and Vehicles
电解液、负极、锂离子电池和车辆
Abstracts:
The present application discloses an electrolyte, a negative electrode, a lithium ion battery and a vehicle. The electrolyte includes: lithium salt, organic solvent and additives; the additives include a first additive, the first additive is a thiadiazole compound, and the structural formula of the thiadiazole compound is as follows: wherein, R1 and R2 are respectively selected from hydrogen atoms, halogen atoms , ether group, amine group, at least one of C1-C10 alkyl group, C2-C10 alkenyl group, C2-C10 alkynyl group, C3-C10 cycloalkyl group and C2-C8 nitrogen-containing polycyclic ring; C1-C10 alkyl group , C2-C10 alkenyl, C2-C10 alkynyl, C3-C10 cycloalkyl and C2-C8 hydrogen atoms in the nitrogen-containing polycyclic ring may be partially or completely substituted by substituents. The electrolyte of the present application has a high reduction potential, and the SEI film is preferentially formed on the negative electrode, and the formed SEI film has good elasticity, which is beneficial to improve the performance of the battery.
