KR101494715B1 - Negative active material for rechargeable lithium battery, method of preparing the same, and negative electrode and rechargeable lithium battery including the same - Google Patents

Negative active material for rechargeable lithium battery, method of preparing the same, and negative electrode and rechargeable lithium battery including the same Download PDF

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KR101494715B1
KR101494715B1 KR20120138461A KR20120138461A KR101494715B1 KR 101494715 B1 KR101494715 B1 KR 101494715B1 KR 20120138461 A KR20120138461 A KR 20120138461A KR 20120138461 A KR20120138461 A KR 20120138461A KR 101494715 B1 KR101494715 B1 KR 101494715B1
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South Korea
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particles
silicon
carbon
lithium
negative electrode
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KR20120138461A
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Korean (ko)
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KR20140070227A (en
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이성만
신민선
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강원대학교산학협력단
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of or comprising active material
    • H01M4/36Selection of substances as active materials, active masses, active liquids
    • H01M4/362Composites
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • H01M10/0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of or comprising active material
    • H01M4/36Selection of substances as active materials, active masses, active liquids
    • H01M4/38Selection of substances as active materials, active masses, active liquids of elements or alloys
    • H01M4/386Silicon or alloys based on silicon
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of or comprising active material
    • H01M4/36Selection of substances as active materials, active masses, active liquids
    • H01M4/58Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H01M4/587Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of or comprising active material
    • H01M4/62Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/621Binders
    • H01M4/622Binders being polymers
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of or comprising active material
    • H01M4/13Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/134Electrodes based on metals, Si or alloys
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of or comprising active material
    • H01M4/13Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/137Electrodes based on electro-active polymers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

Abstract

복수 개의 복합 입자 및 상기 복합 입자 사이의 기공을 포함하는 다공성 조립 입자를 포함하고, 상기 복합 입자는 실리콘(Si)계 입자, 탄소 미립자 및 비정질 카본을 포함하고, 상기 비정질 카본은 소프트 카본 및 하드 카본으로부터 선택되는 적어도 하나를 포함하고, 상기 실리콘계 입자 및 상기 탄소 미립자는 상기 비정질 카본에 분산되는 리튬 이차 전지용 음극 활물질, 이의 제조 방법, 그리고 이를 포함하는 음극 및 리튬 이차 전지가 제공된다.Wherein the composite particle comprises a plurality of composite particles and porous agglomerated particles including pores between the composite particles, wherein the composite particle includes silicon (Si) based particles, carbon fine particles and amorphous carbon, and the amorphous carbon is soft carbon and hard carbon And the carbon particles are dispersed in the amorphous carbon, a method for producing the same, and a negative electrode and a lithium secondary battery including the same, wherein the silicon particles and the carbon fine particles are dispersed in the amorphous carbon.

Description

리튬 이차 전지용 음극 활물질, 이의 제조 방법, 그리고 이를 포함하는 음극 및 리튬 이차 전지{NEGATIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY, METHOD OF PREPARING THE SAME, AND NEGATIVE ELECTRODE AND RECHARGEABLE LITHIUM BATTERY INCLUDING THE SAME}TECHNICAL FIELD The present invention relates to a negative electrode active material for a lithium secondary battery, a method for producing the same, a negative electrode and a lithium secondary battery including the negative electrode active material, a method for producing the same,
본 기재는 리튬 이차 전지용 음극 활물질, 이의 제조 방법, 그리고 이를 포함하는 음극 및 리튬 이차 전지에 관한 것이다.
The present invention relates to a negative electrode active material for a lithium secondary battery, a method for producing the same, and a negative electrode and a lithium secondary battery comprising the same.
최근 휴대용 전자기기의 소형화 및 다기능화에 따른 전원으로서 리튬이차전지의 고용량화가 요구되고 있다. 그러나 현재 상용화되어 있는 음극 활물질로서 흑연은 이론적 용량이 372 mAh/g으로 제한되어 있어 새로운 고용량 음극 활물질 개발이 시급한 실정이다.2. Description of the Related Art In recent years, portable electronic devices have been required to have a higher capacity of a lithium secondary battery as a power source due to miniaturization and multifunction