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1. (WO2011142575) ANODE ACTIVE MATERIAL FOR A LITHIUM SECONDARY BATTERY, METHOD FOR PREPARING SAME, AND LITHIUM SECONDARY BATTERY INCLUDING SAME
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2011/142575    International Application No.:    PCT/KR2011/003453
Publication Date: 17.11.2011 International Filing Date: 11.05.2011
IPC:
H01M 4/583 (2010.01), H01M 4/38 (2006.01), H01M 4/48 (2010.01), H01M 10/0525 (2010.01)
Applicants: ROUTE JJ CO.,LTD [KR/KR]; #304 Sihwa Industrial Complex 2 Na, 1261-3 Jeongwang-dong, Siheung-si Gyeonggi-do 429-450 (KR) (For All Designated States Except US).
HONG, Ji Jun [KR/KR]; (KR) (For US Only).
BYUN, Ki Taek [KR/KR]; (KR) (For US Only).
KIM, Hyo Won [KR/KR]; (KR) (For US Only)
Inventors: HONG, Ji Jun; (KR).
BYUN, Ki Taek; (KR).
KIM, Hyo Won; (KR)
Agent: EOM, Myung Yong; 4th Fl., Maegang Bldg, 1503-9 Seocho-dong, Seocho-gu Seoul 137-070 (KR)
Priority Data:
10-2010-0043798 11.05.2010 KR
Title (EN) ANODE ACTIVE MATERIAL FOR A LITHIUM SECONDARY BATTERY, METHOD FOR PREPARING SAME, AND LITHIUM SECONDARY BATTERY INCLUDING SAME
(FR) MATÉRIAU ACTIF D'ANODE POUR ACCUMULATEUR SECONDAIRE AU LITHIUM, SON PROCÉDÉ DE PRÉPARATION ET ACCUMULATEUR SECONDAIRE AU LITHIUM COMPRENANT CELUI-CI
(KO) 리튬 이차전지용 음극 활물질, 그 제조방법 및 이를 포함하는 리튬 이차전지
Abstract: front page image
(EN)Provided are an anode active material for a lithium secondary battery, a method for preparing same, and a lithium secondary battery including same. An anode active material for a lithium secondary battery according to the present invention includes: active particles by means of which lithium ions may be absorbed/released; and a coating layer coated on the surface of the active particles, wherein the coating layer includes a first material which is a hollow nanofiber and a second material which is a carbon precursor or LTO. When silicon is used as an anode active material for a lithium secondary battery, cracks are generated and active material particles are destroyed due to a change in volume, through the reaction with lithium ions during charging/discharging. However, the anode active material for a lithium secondary battery of the present invention may prevent the capacity from being radically reduced as the charge/discharge cycle proceeds, thereby extending cycle life, and thus achieving a high energy density appropriate for a high-capacity battery.
(FR)L'invention concerne un matériau actif d'anode pour accumulateur secondaire au lithium, un procédé de préparation de celui-ci et un accumulateur secondaire au lithium comprenant celui-ci. Un matériau actif d'anode pour accumulateur secondaire au lithium selon la présente invention comprend : des particules actives grâce auxquelles des ions lithium peuvent être absorbés/libérés; et une couche de revêtement qui est appliquée sur la surface des particules actives, la couche de revêtement comprenant un premier matériau qui est fait une nanofibre creuse et un second matériau qui est un précurseur du carbone ou LTO. Lorsque du silicium est utilisé comme matériau actif d'anode pour un accumulateur secondaire au lithium, des fissures se produisent et des particules de matériau actif sont détruites à cause du changement de volume qui se produit dans la réaction avec les ions lithium pendant le chargement et le déchargement. Par contre, le matériau actif d'anode pour accumulateur secondaire au lithium selon la présente invention peut éviter que la capacité ne soit radicalement réduite avec les cycles de chargement et de déchargement, ce qui augmente le cycle de vie et permet d'atteindre une densité énergétique élevée qui convient pour un accumulateur à haute capacité.
(KO)리튬 이차전지용 음극 활물질, 그 제조방법 및 이를 포함하는 리튬 이차전지가 제공된다. 본 발명에 따른 리튬 이차전지용 음극 활물질은 리튬 이온이 흡수/방출될 수 있는 활성 입자; 및 상기 활성 입자 표면에 코팅된 코팅층을 포함하며, 여기에서 상기 코팅층은 나노 중공 섬유인 제 1 물질과 탄소전구체 또는 LTO인 제 2 물질을 포함하는 것을 특징으로 하며, 본 발명의 리튬 이차전지용 음극 활물질은 실리콘의 경우 충/방전시 리튬과의 반응에 의한 체적 변화로 균열이 발생하고 활물질 입자가 파괴됨으로 충/방전 사이클 진행됨에 따라 용량이 급격하게 저하되는 현상을 방지하며, 이로써 사이클 수명이 길어지므로, 고용량 전지에 적합한 고에너지 밀도를 확보할 수 있다.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LR, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: Korean (KO)
Filing Language: Korean (KO)