Samsung Sdi Co., Inc.

Narae Park

Jinbum Kim

Jinsung Kim

Yongshik Kim

Suhee Han

Jinhyunk Lim

Jungkang Oh

Jin Sung Kim

Ha Young Lee

Myungkuk Patk

Ihn Kim

Sunggwi Ko

Yunkyung Jo

Jungjin Moon

Chanjung Kim

Sukjung Son

Youngsu Kim

Jinburn Kim

Seungjun Min

A separator includes a porous base, and a first coating layer on a surface of the porous base, the first coating layer including a (meth)acrylic acid ester-based polymer having a glass transition temperature of about 10&#xb0; C. to about 60&#xb0; C. The first coating layer may be positioned opposite to a cathode of the lithium secondary battery. The separator may further include a second coating layer on a surface of the porous base opposite to the first coating layer and comprising a (meth)acrylic acid ester-based polymer.

Separator for lithium secondary battery, lithium secondary battery using the separator, and method of manufacturing the lithium secondary battery

An electrolyte for a lithium secondary battery and a lithium secondary battery including the same are provided. The electrolyte includes a non-aqueous organic solvent, lithium salt, and an additive that is either a dicarboxylic acid anhydride and a halogenated ethylene carbonate or a diglycolic acid anhydride and a halogenated ethylene carbonate.

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

An electrolyte for a lithium ion secondary battery includes a non-aqueous organic solvent; a lithium salt; and a phosphonitrile fluoride trimer as an additive, and a lithium ion secondary battery comprising the same. The thickness increase rate of a lithium ion secondary battery including the electrolyte is reduced even when the battery is kept at a high temperature. Thus, the thermal stability and durability of the battery are prominently improved. The durability of the battery can be further improved by including a vinylene carbonate or ethylene carbonate group compound in the electrolyte.

Electrolyte for lithium ion secondary battery and lithium ion secondary battery comprising the same

An electrolyte for a lithium ion secondary battery includes a non-aqueous organic solvent; lithium salt; and difluoro oxalato borate and fluoro ethylene carbonate (FEC). The capacity retention property and durability of a lithium ion secondary battery including the electrolyte is excellent even when the battery is left at a high temperature.

A nonaqueous electrolyte for a lithium secondary battery and a lithium secondary battery including the same are provided. In particular, the nonaqueous electrolyte comprises a compound of chemical formula 1 as an electrolyte additive:NC&#x2014;(R)-A-(R)&#x2014;CN&#x2003;&#x2003;1wherein, Rand Rrepresent, respectively, alkylene groups, n and m represent integers of 1 to 10, and A is an aromatic hydrocarbon in which the number of carbons is 5 to 9 or O. When the lithium secondary battery is kept at high voltage and temperature, the electrolyte additive reduces gas generation, thereby reducing battery swelling. Therefore, it is possible to reduce a battery thickness increment rate and to increase discharge capacity at a high temperature.

Nonaqueous electrolyte for lithium secondary battery and lithium secondary batter using the same

An electrolyte for a lithium ion rechargeable battery, including a lithium salt, a non-aqueous organic solvent, a dihalogenated ethylene carbonate, and a halogenated ethylene carbonate. The electrolyte may include about 0.01 to about 2 weight % of the dihalogenated ethylene carbonate, and the electrolyte may include about 0.1 to about 10 weight % of the halogenated ethylene carbonate.

Electrolyte for lithium ion rechargeable battery and lithium rechargeable battery including the same

Aspects of the present invention relate to an electrolyte for a high voltage lithium rechargeable battery and a high voltage lithium rechargeable battery employing the electrolyte, and more particularly to an electrolyte for a high voltage lithium rechargeable battery comprising a non-aqueous organic solvent; a lithium salt; and a combination of a halogenated biphenyl and a dihalogenated toluene used as an additive where the combined additive has an oxidation reduction potential of 4.6 to 5.0 V with respect to lithium. The lithium rechargeable battery employing the electrolyte for a high voltage lithium rechargeable battery achieves overcharge stability.

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Yongin-si, South Korea

Narae Park