Samsung Sdi Co., Inc.

Takitaro Yamaguchi

Ryuichi Shimizu

Cheol-Soo Jung

Hyun-Jei Chung

Cheol-soo Jung

Jin-Sung Kim

Eui-Hwan Song

Yong-beom Lee

Hyeong-Gon Noh

Sang-Moon Hwang

Joong-Hun Kim

Meen-Seon Paik

Ki-ho Kim

Kyoung-hee Lee

Eui-hwan Song

Young-Chul Chang

Doo-kyung Yang

Hyun-jeong Lim

Jin-Wook Lee

Hyun-Jei c/o Samsung Sdi Co Ltd Chung

Eui-Hwan c/o Samsung Sdi Co Ltd Song

Joong-Hun c/o Samsung Sdi Co Ltd Kim

The present invention provides a lithium secondary battery having high-capacity as well as good cycle characteristics. The lithium secondary battery includes a positive electrode comprising a positive active material, a negative electrode comprising a negative active material and an electrolyte. The negative active material includes graphite particles combined to Si particulate. The electrolyte includes a solvent, a polyether modified silicone oil where a linear polyether chain is linked to a polysiloxane chain, and a solute comprising a lithium salt.

Rechargeable lithium battery with an electrode active material including a multi-phase alloy powder

Disclosed is a rechargeable lithium battery comprising a negative electrode and a positive electrode capable of intercalating and deintercalating lithium, and an electrolyte, wherein the electrolyte comprises a polyacrylate compound having three or more acrylic groups.

Rechargeable lithium battery and method of fabricating same

Disclosed is a rechargeable lithium battery including a positive electrode and a negative electrode in which lithium intercalations occurs, and an electrolyte including a low-inflammability solvent with a heat of combustion of 19,000 kJ/kg or less, and a lithium salt.

Electrolyte solvent and rechargeable lithium battery

A lithium rechargeable battery includes a positive electrode that intercalates and deintercalates lithium and a negative electrode that intercalates and deintercalates lithium and has a current collector including Cu or a Cu alloy. In addition, the battery includes a separator interposed between the positive electrode and the negative electrode, and an electrolyte that transfers lithium ions.

Lithium rechargeable battery and lithium rechargeable battery pack

A non-aqueous electrolyte having improved lithium ion conductivity and excellent voltage resistance is provided. A lithium rechargeable battery and a rechargeable battery system including the inventive non-aqueous electrolyte is also provided. The non-aqueous electrolyte includes at least one aromatic compound which is polymerizable at a working electrode potential of 4.2 to 4.5 V when a lithium metal is used as a counter electrode and platinum is used as a working electrode.

Non-aqueous electrolyte, rechargeable lithium battery, and rechargeable battery system

An electrolyte for a lithium secondary battery which has a non-aqueous organic solvent including a &#x3b3;-butyrolactone and optionally a cyclic carbonate, an ester compound having an electron withdrawing group, and at least two salts. The lithium secondary battery including the electrolyte has good safety and good storage characteristics at high temperature.

Electrolyte for lithium secondary battery and lithium secondary battery comprising same

Disclosed is a non-aqueous electrolyte for a rechargeable lithium battery including a polyether-modified silicon oil in which a polyether chain is bonded to a terminal end of a linear polysiloxane, a cyclic carbonate, and a lithium salt.

Electrolyte for rechargeable lithium battery and rechargeable lithium battery comprising same

Disclosed is an electrolyte for a rechargeable lithium battery including 5 to 40 volume % of at least one fluorine-substituted ether compound represented by R1&#x2014;O&#x2014;R2 (wherein R1 and R2 are alkyl groups substituted with fluorine), having a substitution ratio of hydrogen with fluorine of 57 to 86%, a viscosity of 0.9 to 2.3 cp, and a boiling point of at least 88&#xb0; C., and 60 to 90 volume % of a non-aqueous organic solvent having a flash point of at least 80&#xb0; C.

A solid polymer electrolyte, a lithium battery employing the same, and methods of forming the electrolyte and the lithium battery. The polymer electrolyte includes polyester (meth)acrylate having a polyester polyol moiety having three or more hydroxide (&#x2014;OH) groups, at least one hydroxde group being substituted by a (meth)acrylic ester group and at least one hydroxide group being substituted by a radical non-reactive group, or its polymer, a peroxide having 6 to 40 carbon atoms, and an electrolytic solution including a lithium salt and an organic solvent.

Polymer electrolyte and lithium battery employing the same

A polymer electrolyte includes an organic electrolyte solution and a composite fiber immersed with the organic electrolyte solution. The organic electrolyte includes lithium salts dissolved in a non-aqueous solvent. The composite fiber includes a fiber that is gelable, and a fiber that is ungelable by the non-aqueous solvent. The gelable fiber has at least two acidic groups and at least two gelable functional groups. The gelable fiber is cross-linked by a bivalent or multivalent basic cross-linking agent, thereby cross-linking the composite fiber.

Polymer electrolyte, rechargeable lithium battery and method of preparing rechargeable lithium battery

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

A polymer electrolyte includes a gel-forming polymer electrolyte including a gel-forming compound connected at metal cations, and an organic electrolyte of a lithium salt and an aprotic solvent. The polymer electrolyte includes a gel-forming polymer electrolyte that includes at least one aziridine ring-containing compound, and an organic electrolyte of lithium salt and aprotic solvent.

Polymer electrolyte and a lithium secondary battery having the same

Disclosed is a method of fabricating a rechargeable lithium battery and a rechargeable lithium battery fabricated by the same. In this method, an electrolyte is placed between a positive electrode and a negative electrode to prepare an electrode element, and the electrode element is pulse charged.

Growing community of inventors

Yokohama, Japan

Takitaro Yamaguchi