Samsung Sdi Co., Inc.

Samsung Display Devices Co., Ltd.

Seoul National University

Wan-Uk Choi

Jae-Yul Ryu

Sang-min Lee

Sang-Young Yoon

Goo-Jin Jeong

Sang-Min Lee

Nam-Soon Choi

Joon-Sup Kim

Yong-Mook Kang

Min-Seok Sung

Sung-soo Kim

Kyou-Yoon Sheem

Jea-Woan Lee

Seung-Hee Park

Su-Yeong Park

Doo-Kyoung Lee

Sung-Soo Kim

Sang-Jin Kim

Young-Ugk Kim

Chang-Keun Back

Jin-Hee Moon

Kyeu-Yoon Sheem

Tae-Gon Kim

Yong-Bum Lee

Kyoung-Han Ryu

Young-Hee Lee

Kyoung-Han Yew

Tae-gon Kim

Naoya Kobayashi

Jin-Ho Lee

In-Seop Byun

Hun-joon Sohn

Jeong-Ju Cho

Kyou-yoon Sheem

Yang-Soo Kim

Hee-Joon Chun

Sang-Jim Kim

Kyoo-Yoon Shim

Sang-jin Kim

Jeong-ju Cho

Ri-Zhu Yin

Hye-won Kim

Min-Sook Sung

Young-Chang Lim

Hisaki Tarui

Chang-Kuen Back

Tae-Wan Kim

An active material for a rechargeable lithium battery is provided with a non-carbon-based material on which nanofiber-shaped carbon having an oxygen-included functional group is grown. The negative active material for a rechargeable lithium battery has good conductivity and cycle life characteristics.

Active material for rechargeable lithium battery and rechargeable lithium battery including the same

A rechargeable lithium battery according to the present invention includes a positive electrode including a positive active material being capable of intercalating and deintercalating lithium; a negative electrode including a negative active material being capable of intercalating and deintercalating lithium; and a non-aqueous electrolyte. The negative electrode includes a lithium-containing metal compound that is inactive for water, and can intercalate lithium during at least discharge. The rechargeable lithium battery has an irreversible capacity during a first charge and discharge, and has no problems such dendrite, electrolyte decomposition, or dissolution of a negative current collector.

Rechargeable lithium battery and method for manufacturing the same

Disclosed is a rechargeable lithium battery that includes a positive electrode including a lithium nickel-based positive active material; a negative electrode including a negative active material; an electrolyte including a lithium salt and a non-aqueous organic solvent; and a separator including a polymer substrate and a hydroxide compound-containing coating layer disposed on the polymer substrate.

Rechargeable lithium battery

A lithium secondary battery includes a positive electrode, a negative electrode, and an electrolyte. The negative electrode includes a current collector, an active material layer on the current collector and including an amorphous silicon oxide represented by SiO(0.95&#x3c;x&#x3c;1.7), and an SEI layer on the active material layer and including about 70 area % or more of protrusion parts having a size of about 5 nm to 300 nm during charging of the battery.

Lithium secondary battery

Negative active materials and rechargeable lithium batteries including the negative active materials are provided. The negative active material includes an intermetallic compound of Si and a metal, and a metal matrix including Cu and Al. The negative active material may provide a rechargeable lithium battery having high capacity and excellent cycle-life and cell efficiency.

Negative active material containing an intermetallic compound of silicon and a first metal and a metal matrix containing copper and aluminum for rechargeable lithium battery and rechargeable lithium battery containing the negative active material

Negative active materials for rechargeable lithium batteries are provided. One negative active material includes a metal matrix, and an intermetallic compound including a Si active metal and an additive metal dispersed in the metal matrix. The additive metal may be Ca, Mg, Na, K, Sr, Rb, Ba, Cs, or a combination thereof. The metal matrix may comprise Cu and Al. The negative active material may comprise a X(aM-bSi)&#x2014;Y(cCu-dAl) material, where X is from about 30 to about 70 wt %, Y is from about 30 to about 70 wt %, X+Y is 100 wt %, a+b is 100 wt %, a is from about 20 to 80 wt %, b is from about 20 to 80 wt %, c+d is 100 wt %, c is from about 80 to about 95 wt %, d is from about 5 to about 20 wt %, and M may be Ca, Mg, Na, K, Sr, Rb, Ba, Cs, or a combination thereof.

Negative active material for rechargeable lithium battery, method for preparing same, and rechargeable lithium battery including same

A negative electrode for rechargeable lithium batteries includes a current collector, a porous active material layer having a metal-based active material disposed on the current collector, and a high-strength binder layer on the porous active material layer. The high-strength binder layer has a strength ranging from 5 to 70 MPa. The negative active material for a rechargeable lithium battery according to the present invention can improve cycle-life characteristics by suppressing volume expansion and reactions of an electrolyte at the electrode surface.

Negative electrode for rechargeable lithium battery and rechargeable lithium battery including the same

Negative active materials, negative electrodes, and rechargeable lithium batteries are provided. A negative electrode according to one embodiment includes a non-carbon-based active material, a lithium salt having an oxalatoborate structure, and a high-strength polymer binder. The negative active material may include a non-carbon-based material and a coating layer on the non-carbon-based material. The coating layer includes a lithium salt having an oxalatoborate structure and a high-strength polymer binder. A rechargeable lithium battery including the negative electrode or negative active material has good cycle life characteristics and high capacity.

Negative electrode and negative active material for rechargeable lithium battery, and rechargeable lithium battery including same

An negative active material for a rechargeable lithium battery includes a nano-composite including a Si phase, a SiOphase, and a metal oxide phase of formulation MO, where M is a metal with an oxidation number x, a free energy of oxygen-bond formation ranging from &#x2212;900 kJ/mol to &#x2212;2000 kJ/mol, x, and x&#xb7;y=2. The negative active material for a rechargeable lithium battery according to the present invention can improve initial capacity, initial efficiency, and cycle-life characteristics by suppressing its initial irreversible reaction.

Negative active material for rechargeable lithium battery, and method of preparing the same

The negative electrode for a rechargeable lithium battery includes a current collector and a negative active material layer disposed on the current collector. The negative active material layer includes a metal-based negative active material and sheet-shaped graphite and has porosity of 20 to 80 volume %. The negative electrode for a rechargeable lithium battery can improve cell characteristics by inhibiting volume change and stress due to active material particle bombardment during charge and discharge, and by decreasing electrode resistance.

Negative electrode for rechargeable lithium battery, and rechargeable lithium battery including same

A negative active material for a rechargeable lithium battery includes a compound represented by the following Formula 1:LiTiMO&#x2003;&#x2003;(1)

Negative active material for rechargeable lithium battery, method of preparing the same, and rechargeable lithium battery including the same

A negative electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same are provided. The negative electrode for a rechargeable lithium battery includes a current collector, and a negative active material layer on the current collector. The negative active material layer includes an interpenetrating network network, and a negative active material in the interpenetrating network network. The interpenetrating network is formed by cross-linking a first polymer having a hydroxyl or amine group and a second polymer having a carboxylic acid group. The negative electrode for a rechargeable lithium battery minimizes volume expansion and imparts good cycle-life characteristics and initial formation efficiency.

Negative electrode for rechargeable lithium battery, and rechargeable lithium battery including the same

A rechargeable lithium battery includes a negative electrode with a graphite-based active material with boron as a donor and a positive electrode with a transition metal oxide-based active material. A separator is interposed between the negative and positive electrodes. The positive and negative electrodes and the separator are all saturated with an electrolyte. The electrolyte contains cyclic carbonate and chain carbonate at a ratio of 51:49 by volume percent.

Growing community of inventors

Yongin-si, South Korea

Wan-Uk Choi