Samsung Sdi Co., Inc.

Cheil Industries Inc.

Ukseung Chemical Co., Ltd.

Sang-Moon Hwang

Jin-Sung Kim

Meen-Seon Paik

Hak-Soo Kim

Yong-Chul Park

Jin-Hee Kim

Geun-Bae Kim

Won-Il Jung

Jae-Phil Cho

Jung-Joon Park

Sang-jun Lee

Jong-Seob Kim

Chan-Jung Kim

Young-Gyu Kim

Jae-Hou Nah

Ho-Jin Kweon

Ryuichi Shimizu

Takitaro Yamaguchi

Cheol-soo Jung

Young-Bae Roh

Jin-Wook Lee

Seung-Kee Kim

Won-Ii Jung

An active material for a battery includes an electrochemically reversibly oxidizable and reducible base material selected from the group consisting of a metal, a lithium-containing alloy, a sulfur-based compound, and a compound that can reversibly form a lithium-containing compound by a reaction with lithium ions and a surface-treatment layer formed on the base material and comprising a compound of the formula MXO, wherein M is at least one element selected from the group consisting of an alkali metal, an alkaline earth metal, a group 13 element, a group 14 element, a transition metal, and a rare-earth element, X is an element that is capable of forming a double bond with oxygen, k is a numerical value in the range of 2 to 4.

Active material for battery and battery having the same

An electrolyte for a lithium secondary battery includes lithium salts, a non-aqueous organic solvent, and additive compounds, which initiates decomposition at 4V to 5V and show a constant current maintenance plateau region of more than or equal to 0.5V at measurement of LSV (linear sweep voltammetry). The additive compounds added to the electrolyte of the present invention decompose earlier than the organic solvent to form a conductive polymer layer on the surface of a positive electrode by increased electrochemical energy and heat at overcharge. The conductive polymer layer prevents decomposition of the organic solvent. Accordingly, the electrolyte inhibits gas generation caused by decomposition of the organic solvent during high temperature storage, and also improves safety of the battery during overcharge.

Non-aqueous electrolyte and lithium secondary battery comprising same

An electrolyte for a lithium secondary battery includes lithium salts, a non-aqueous organic solvent, and additive compounds. The additive compounds added to the electrolyte of the present invention decompose earlier than the organic solvent to form a conductive polymer layer on the surface of a positive electrode, and prevent decomposition of the organic solvent. Accordingly, the electrolyte inhibits gas generation caused by decomposition of the organic solvent at initial charging, and thus reduces an increase of internal pressure and swelling during high temperature storage, and also improves safety of the battery during overcharge.

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

A non-aqueous electrolyte for a lithium secondary battery is provided. The electrolyte comprises a lithium salt, a non-aqueous solvent, and an organic compound selected from the group consisting of compounds represented by Formulae (1) to (6): wherein Rto Rare each independently selected from the group consisting of primary, secondary, and tertiary alkyl groups, alkenyl groups, and aryl groups; X is hydrogen or halogen; and n and m are numerical values ranging from 0 to 3.

Electrolyte for lithium secondary battery and lithium secondary battery comprising same

An active material for a battery has a surface-treatment layer including a compound of the formula (1):MXO&#x2003;&#x2003;(1)

Active material for battery and method of preparing the same

An electrolyte for a lithium secondary battery is provided. The electrolyte includes a lithium salt, a non-aqueous organic solvent, and a compound represented by Formula (1):wherein R, R, and Rare each independently selected from the group consisting of hydrogen, primary, secondary, and tertiary alkyl groups, alkenyl groups, and aryl groups. The compound of the present invention is decomposed earlier than an electrolytic organic solvent, and an organic SEI film is formed on a negative electrode, thereby inhibiting the electrolytic organic solvent from decomposing.

Non-aqueous electrolyte for lithium secondary battery and lithium secondary battery comprising same

Positive active material for rechargeable lithium batteries and method of preparing same

Growing community of inventors

Cheonan, South Korea

Sang-Moon Hwang