公开(公告)号：US20100203386A1

公开(公告)日：2010-08-12

申请号：US12558100

申请日：2009-09-11

Applicant: Sung Kyun CHANG ,  Seung Tae HONG ,  Hyeong Jin KIM ,  Duk Hyun RYU ,  Eun Young GOH ,  Ho Chun LEE ,  Jun Yong JEONG ,  Jin Hee YEON ,  Hyung Keun LEE

Inventor： Sung Kyun CHANG ,  Seung Tae HONG ,  Hyeong Jin KIM ,  Duk Hyun RYU ,  Eun Young GOH ,  Ho Chun LEE ,  Jun Yong JEONG ,  Jin Hee YEON ,  Hyung Keun LEE

IPC: H01M4/485 ,  H01M4/525 ,  H01M4/32 ,  H01M4/505 ,  H01M4/56 ,  H01M4/42 ,  H01M4/46 ,  H01M4/40 ,  H01M4/131

CPC classification number: H01M4/525 ,  H01M4/131 ,  H01M4/136 ,  H01M4/364 ,  H01M4/366 ,  H01M4/505 ,  H01M4/5825 ,  H01M10/0525 ,  H01M10/0566 ,  Y02E60/122

Abstract: Disclosed is a lithium secondary battery, which is low in capacity loss after overdischarge, having excellent capacity restorability after overdischarge and shows an effect of preventing a battery from swelling at a high temperature.

Abstract translation: 公开了一种锂二次电池，其在过放电后的容量损失低，在过放电后具有优异的容量恢复性，并且显示出防止电池在高温下膨胀的效果。

公开(公告)号：US07754385B2

公开(公告)日：2010-07-13

申请号：US12535207

申请日：2009-08-04

Applicant: Sung Kyun Chang ,  Hyeong Jin Kim ,  Sang Hoon Choy ,  Jeong Ju Cho

Inventor： Sung Kyun Chang ,  Hyeong Jin Kim ,  Sang Hoon Choy ,  Jeong Ju Cho

IPC: H01M4/58

CPC classification number: H01M4/366 ,  H01M4/0402 ,  H01M4/0416 ,  H01M4/0471 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/40 ,  H01M4/58 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/058 ,  H01M2004/027

Abstract: Disclosed is an anode active material, comprising: (a) a carbonaceous material; and (b) a carbide coating layer partially or totally formed on a surface of the carbonaceous material, the carbide coating layer comprising at least one element selected from the group consisting of metals and metalloids. An anode obtained by using the anode active material and an electrochemical device comprising the anode are also disclosed. The carbonaceous material comprises a coating layer of metal-/metalloid-carbide obtained by treating it at high temperature under inert atmosphere, wherein the coating layer has increased interfacial boding force to the carbonaceous material and thus shows minimized reactivity to lithium. The carbonaceous material as anode active material can minimize the irreversible anode capacity needed for the formation of an SEI film during the first charge/discharge cycle, thereby providing high capacity, high efficiency and significantly improved anode qualities.

Abstract translation: 公开了一种阳极活性材料，其包含：（a）碳质材料; 和（b）部分或全部形成在所述碳质材料的表面上的碳化物涂层，所述碳化物涂层包含选自金属和准金属的至少一种元素。 还公开了通过使用阳极活性材料获得的阳极和包括阳极的电化学装置。 含碳材料包括通过在惰性气氛下在高温下处理而获得的金属/ /类金刚石碳化物的涂层，其中涂层对碳质材料具有增加的界面粘合力，因此显示出对锂的反应性最小化。 作为阳极活性材料的碳质材料可以使在第一充电/放电循环期间形成SEI膜所需的不可逆阳极容量最小化，从而提供高容量，高效率和显着改善的阳极质量。

公开(公告)号：US07217479B2

公开(公告)日：2007-05-15

申请号：US10312672

申请日：2002-05-22

Applicant: Hong-Kyu Park ,  Jeh-Won Choi ,  Yeon-Hee Lee ,  Young-Tack An ,  Hyeong-Jin Kim

Inventor： Hong-Kyu Park ,  Jeh-Won Choi ,  Yeon-Hee Lee ,  Young-Tack An ,  Hyeong-Jin Kim

IPC: H01M6/18 ,  H01M6/16

CPC classification number: H01M10/4235 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0567 ,  H01M2300/0025

Abstract: The present invention relates to a non-aqueous electrolyte additive for improving safety and a lithium secondary battery comprising the same, and more particularly to a non-aqueous electrolyte additive that can improve cycle life and safety properties of a lithium ion secondary battery.According to the present invention, an organometallic compound represented by the Chemical Formula 1 is added to a non-aqueous electrolyte of a battery as an additive, and thus if a battery voltage is out of normal operation voltage range due to a short circuit and overcharge of a battery, etc., the non-aqueous electrolyte additive decomposes and a part of the decomposed additive polymerizes to form an insulating film on a cathode surface, and a part of the metal reacts with an insulating film formed on a cathode surface to improve thermal stability of the battery, thereby improving safety of the battery.

公开(公告)号：US06692874B2

公开(公告)日：2004-02-17

申请号：US09936240

申请日：2001-09-07

Applicant: Hyeong-Jin Kim ,  Seung-II Yoo ,  Jae-Sik Chung

Inventor： Hyeong-Jin Kim ,  Seung-II Yoo ,  Jae-Sik Chung

IPC: H01M1040

CPC classification number: H01M10/0569 ,  H01M10/0525 ,  H01M10/0567 ,  H01M2300/0025 ,  H01M2300/0037

Abstract: The present invention relates to a lithium ion battery, more particularly to a new electrolyte for a lithium ion battery, the new electrolyte comprising a compound which is either 4-carbomethoxymethyl 1,3-dioxan-2-one or 4-carboethoxymethyl 1,3-dioxan-2-one. Each of these compounds comprises a cyclic ring carbonate structure and a linear carbonate structure. The battery also comprises an anode including graphitized carbon and a cathode including a lithium transition metal oxide, and exhibits a superior charge-discharge life cycle characteristic and low temperature performance.

Abstract translation: 锂离子电池技术领域本发明涉及一种锂离子电池，更具体地说，涉及一种用于锂离子电池的新电解质，该新型电解质包含4-甲氧羰基甲基1,3-二恶烷-2-酮或4-乙氧羰基甲基1,3 - 二恶烷-2-酮。 这些化合物各自包含环状碳酸酯结构和直链碳酸酯结构。 电池还包括具有石墨化碳和包含锂过渡金属氧化物的阴极的阳极，并且具有优异的充放电寿命特性和低温性能。