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1. (WO2019031766) METHOD FOR FORMING LITHIUM METAL AND INORGANIC MATERIAL COMPOSITE THIN FILM AND METHOD FOR PRE-LITHIATION OF NEGATIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY BY USING SAME
Latest bibliographic data on file with the International BureauSubmit observation

Pub. No.: WO/2019/031766 International Application No.: PCT/KR2018/008817
Publication Date: 14.02.2019 International Filing Date: 03.08.2018
IPC:
H01M 4/139 (2010.01) ,H01M 4/1391 (2010.01) ,H01M 4/04 (2006.01) ,H01M 10/0525 (2010.01)
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4
Electrodes
02
Electrodes composed of, or comprising, active material
13
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
139
Processes of manufacture
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4
Electrodes
02
Electrodes composed of, or comprising, active material
13
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
139
Processes of manufacture
1391
of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4
Electrodes
02
Electrodes composed of, or comprising, active material
04
Processes of manufacture in general
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10
Secondary cells; Manufacture thereof
05
Accumulators with non-aqueous electrolyte
052
Li-accumulators
0525
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
Applicants:
주식회사 엘지화학 LG CHEM, LTD. [KR/KR]; 서울시 영등포구 여의대로 128 128, Yeoui-daero, Yeongdeungpo-gu, Seoul 07336, KR
Inventors:
우상욱 WOO, Sang Wook; KR
김은경 KIM, Eun Kyung; KR
강윤아 KANG, Yoon Ah; KR
송준혁 SONG, Jun Hyuk; KR
채오병 CHAE, Oh Byong; KR
Agent:
김홍균 KIM, Hong Gyun; KR
Priority Data:
10-2017-010138010.08.2017KR
10-2018-008781427.07.2018KR
Title (EN) METHOD FOR FORMING LITHIUM METAL AND INORGANIC MATERIAL COMPOSITE THIN FILM AND METHOD FOR PRE-LITHIATION OF NEGATIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY BY USING SAME
(FR) PROCÉDÉ DE FORMATION D'UN FILM MINCE COMPOSITE DE MÉTAL DE LITHIUM ET DE MATÉRIAU INORGANIQUE ET PROCÉDÉ DE PRÉ-LITHIATION D'ÉLECTRODE NÉGATIVE POUR BATTERIE SECONDAIRE AU LITHIUM À L'AIDE DE CELUI-CI
(KO) 리튬금속과 무기물 복합박막 제조방법 및 이를 이용한 리튬 이차전지 음극의 전리튬화 방법
Abstract:
(EN) The present invention relates to a method for pre-lithiation of a negative electrode, the method comprising: a first step for introducing an inorganic material powder into molten lithium to form a mixture; a second step for extruding and cooling the mixture, thereby preparing a lithium metal-inorganic material composite ribbon with a thickness of 100-200 ㎛; a third step for rolling the lithium metal-inorganic material composite ribbon to prepare a lithium metal-inorganic material composite thin film; and a fourth step for placing the lithium metal-inorganic material composite thin film on a surface of a negative electrode to form a lithium metal-inorganic material composite layer. In the present invention, the lithium metal-inorganic material composite thin film is joined to the negative electrode, thereby minimizing the exposure time of lithium to the air, and therefore, the present invention has an effect of solving a problem of the deterioration of lithium during application of a mixture slurry, due to high reactivity of the lithium metal, in the application of a conventional lithium metal-inorganic material mixture. A negative electrode for a secondary battery, manufactured by the method for pre-lithiation provided in the present invention, has improved initial irreversibility, and a secondary battery manufactured using such a negative electrode for a secondary battery has excellent charging and discharging efficiency.
(FR) La présente invention concerne un procédé de pré-lithiation d'une électrode négative, le procédé comprenant : une première étape consistant à introduire une poudre de matériau inorganique dans du lithium fondu pour former un mélange ; une seconde étape consistant à extruder et à refroidir le mélange, ce qui permet de préparer un ruban composite de métal de lithium-matériau inorganique ayant une épaisseur de 100 à 200 µm ; une troisième étape consistant à laminer le ruban composite de métal de lithium-matériau inorganique pour préparer un film mince composite de métal de lithium-matériau inorganique ; et une quatrième étape consistant à placer le film mince composite de métal de lithium-matériau inorganique sur une surface d'une électrode négative pour former une couche composite de métal de lithium-matériau inorganique. Dans la présente invention, le film mince composite de métal de lithium-matériau inorganique est joint à l'électrode négative, ce qui permet de réduire au minimum le temps d'exposition du lithium à l'air, et par conséquent, la présente invention a pour effet de résoudre un problème de la détérioration du lithium pendant l'application d'une bouillie de mélange, due à une réactivité élevée du métal de lithium, dans l'application d'un mélange de métal de lithium-matériau inorganique classique. Une électrode négative pour une batterie secondaire, fabriquée par le procédé de pré-lithiation selon la présente invention, présente une irréversibilité initiale améliorée, et une batterie secondaire fabriquée à l'aide d'une telle électrode négative pour une batterie secondaire présente une excellente efficacité de charge et de décharge.
(KO) 본 발명은, 용융된 리튬에 무기물 분말을 투입해 혼합물을 만드는 제 1 단계; 상기 혼합물을 압출한 후, 냉각시켜 100~200㎛ 두께의 리튬금속-무기물 복합체 리본을 제조하는 제 2 단계; 상기 리튬금속-무기물 복합체 리본을 압연하여 리튬금속-무기물 복합체 박막을 제조하는 제 3 단계; 및 음극의 표면에 상기 리튬금속-무기물 복합체 박막을 올려 리튬금속-무기물 복합층을 형성하는 제 4 단계;를 포함하는 음극의 전리튬화 방법이다. 본 발명은 리튬금속-무기물 복합 박막을 음극에 접합하기 때문에, 리튬이 대기에 노출되는 시간을 최소화하여, 종래 리튬금속-무기물 혼합물을 도포함에 있어, 리튬금속의 높은 반응성으로 인해 혼합물 슬러리를 도포하는 과정에서 리튬이 변질되는 문제를 개선한 효과가 있다. 본 발명에서 제공하는 전리튬화 방법을 통해 제조된 이차전지용 음극은 초기 비가역성이 개선된 특성을 가지며, 이러한 이차전지용 음극을 이용하여 제조한 이차전지는 우수한 충방전 효율을 가진다.
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African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, 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, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Korean (KO)
Filing Language: Korean (KO)