KR100816586B1 - 2차 전지용 음극재, 이를 이용한 2차 전지, 2차 전지용음극재 제조방법 및 이를 이용한 2차 전지 - Google Patents
2차 전지용 음극재, 이를 이용한 2차 전지, 2차 전지용음극재 제조방법 및 이를 이용한 2차 전지 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000010405 anode material Substances 0.000 title description 3
- 239000010406 cathode material Substances 0.000 title 1
- 239000007773 negative electrode material Substances 0.000 claims abstract description 46
- 239000004020 conductor Substances 0.000 claims abstract description 30
- 239000002180 crystalline carbon material Substances 0.000 claims abstract description 25
- 229910021382 natural graphite Inorganic materials 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 12
- 239000011248 coating agent Substances 0.000 claims abstract description 10
- 238000000576 coating method Methods 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 238000010304 firing Methods 0.000 claims description 12
- 239000002041 carbon nanotube Substances 0.000 claims description 7
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 7
- 239000006245 Carbon black Super-P Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims 1
- 230000006866 deterioration Effects 0.000 abstract description 4
- 239000008151 electrolyte solution Substances 0.000 abstract 1
- -1 secondary battery Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 12
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 8
- 239000011307 graphite pitch Substances 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 6
- 239000007770 graphite material Substances 0.000 description 5
- 239000011295 pitch Substances 0.000 description 5
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 4
- 239000002033 PVDF binder Substances 0.000 description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 4
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 4
- 239000006229 carbon black Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000007772 electrode material Substances 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000003273 ketjen black Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection 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
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0471—Processes of manufacture in general involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/366—Composites as layered products
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- H—ELECTRICITY
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- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/021—Physical characteristics, e.g. porosity, surface area
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- Y—GENERAL 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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
Description
구분 | 결정성 탄소재료 | 저결정성 탄소재료 | 도전재 | 도전재투입시점 | |
실시예 | 1 | 천연흑연 | 피치 | 케젠블랙 1.0중량% | 저결정탄소와 동시 |
2 | 천연흑연 | 피치 | 케젠블랙 0.5중량% | 저결정탄소와 동시 | |
3 | 천연흑연 | 피치 | 케젠블랙 0.3중량% | 저결정탄소와 동시 | |
4 | 천연흑연 | 피치 | 케젠블랙 0.2중량% | 저결정탄소와 동시 | |
비교예 | 1 | 천연흑연 | 피치 | 케젠블랙 0.1중량% | 저결정탄소와 동시 |
2 | 천연흑연 | 피치 | 케젠블랙 0.5중량% | 음극재 제조후 |
상기 표 1에 따르는 실시예 1 내지 4 및 비교예 1은 심재 탄소재료인 구상의 천연흑연질 탄소재료에 테트라하이드로퓨란(THF)으로 녹인 피치를 일정 중량비를 투입하고, 여기에 도전재로서 케젠블랙(ketjen black)을 전체 중량 대비 상기 표 1에 나타낸 바에 따르는 양을 첨가하여 상압 조건하에서 2시간 동안 습식 교반을 통해 균일하게 혼합한 후, 건조시켰다.
상기 건조된 결과물을 1차로 1,100℃의 온도에서 1시간 동안, 2차로 1,500℃에서 1시간 동안 단계적으로 소성시켰다.
상기 2단계의 소성과정을 진행한 후, 분급을 하여, 미분을 제거하였다.
상기 미분이 제거된 음극재인 흑연질 탄소재료와 피치의 혼합물 100g을 500㎖의 용기(vial)에 넣고 소량의 N-메틸피롤리돈(NMP)과 바인더로서 폴리플루오르화비닐리덴(PVDF)를 투입한후, 믹서기를 이용하여 혼련하였다.
최종적으로 구리 호일상에 압착 건조하여 시험 전극으로 제조하였다.
구분 | 전극저항 (Ω) | 1회째 방전용량 (mAh/g) | 1회째 충방전효율 (%) | |
실시예 | 1 | 0.9 | 356.2 | 94.3 |
2 | 1.4 | 353.5 | 93.2 | |
3 | 1.7 | 352.7 | 92.9 | |
4 | 1.9 | 351.4 | 92.5 | |
비교예 | 1 | 2.3 | 348.2 | 91.9 |
2 | 2.2 | 349.8 | 92.2 |
Claims (17)
- 2차 전지용 음극재에 있어서,천연흑연인 음극활물질; 및상기 음극활물질 중량 대비 0.2 중량% 이상의 함량으로 그 표면에 피복된 도전재;를 포함하여 이루어지되,상기 도전재는, 슈퍼-P 또는 탄소나노튜브가 이용되며,그 전극 저항은 2.0Ω 이하인 값을 갖는 것을 특징으로 하는 2차 전지용 음극재.
- 2차 전지용 음극재에 있어서,천연흑연인 음극활물질; 및상기 음극활물질 표면에 저결정성 탄소재료인 피치와 도전재의 혼합물을 이용하여 피복된 피복재;를 포함하여 이루어지되,상기 도전재는, 슈퍼-P 또는 탄소나노튜브가 이용되며,, 상기 음극활물질 및 저결정성 탄소재료의 합계 중량 대비 0.2 중량% 이상의 함량으로 포함되어 이루어지되,그 전극 저항은 2.0Ω 이하의 값을 갖는 것을 특징으로 하는 2차 전지용 음극재.
- 제1항 또는 제2항에 따르는 2차 전지용 음극재를 전지의 음극으로 이용하여 제조된 2차 전지.
- 제3항에 있어서,상기 2차 전지는, 상기 음극재의 방전용량이 330 ㎃h/g 이상이고, 그 충방전효율이 90% 이상인 것을 특징으로 하는 2차 전지.
- 제4항에 따르는 2차 전지용 음극재를 전지의 음극으로 이용하여 제조된 2차 전지.
- (S1)결정성 탄소재료인 천연흑연, 저결정성 탄소재료인 피치 및 슈퍼-P 또는 탄소나노튜브를 이용한 도전재를 준비하는 단계;(S2)상기 준비된 재료를 동시에 혼합하여, 결정성 탄소재료에 저결정성 탄소재료와 도전재가 동시에 피복되도록 한 후, 건조하는 단계; 및(S3)상기 건조된 결과물을 소성하는 단계;를 포함하여 진행하는 것을 특징으로 하는 2차 전지용 음극재 제조 방법.
- 제6항에 있어서,상기 (S3)단계의 소성은 서로 다른 온도로서 2단계 이상으로 진행하되,초기 소성 단계는 상대적으로 낮은 온도에서 진행하고,후기 소성 단계는 상대적으로 높은 온도에서 각각 진행하는 것을 특징으로 하는 2차 전지용 음극재 제조방법.
- 제6항 또는 제7항에 따르는 2차 전지용 음극재 제조 방법에 따라 제조된 음극재를 전지의 음극으로 이용하여 제조된 2차 전지.
- 제8항에 있어서,상기 2차 전지는 상기 음극재의 방전용량이 330 ㎃h/g 이상이고, 그 충방전효율이 90% 이상인 것을 특징으로 하는 2차 전지.
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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KR1020060008883A KR100816586B1 (ko) | 2006-01-27 | 2006-01-27 | 2차 전지용 음극재, 이를 이용한 2차 전지, 2차 전지용음극재 제조방법 및 이를 이용한 2차 전지 |
JP2006340509A JP4751988B2 (ja) | 2006-01-27 | 2006-12-18 | 2次電池用陰極材、及び、これを用いた2次電池 |
CNA2007100037858A CN101009370A (zh) | 2006-01-27 | 2007-01-24 | 二次电池用阳极材料、二次电池、阳极材料的制法及由其制造的阳极材料制成的二次电池 |
US11/698,938 US20070178382A1 (en) | 2006-01-27 | 2007-01-26 | Anode material for secondary battery, secondary batteries using the same, method for manufacturing anode material for secondary battery and secondary batteries using the same |
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US12206096B2 (en) | 2020-12-17 | 2025-01-21 | Sk On Co., Ltd. | Anode active material for secondary battery, secondary battery including the same, and method of preparing the same |
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KR101365568B1 (ko) | 2006-07-19 | 2014-02-20 | 니폰 카본 컴퍼니 리미티드 | 리튬 이온 2차 전지용 음극 활물질 및 이를 포함한 음극 |
JP5924801B2 (ja) * | 2007-08-22 | 2016-05-25 | 日本カーボン株式会社 | リチウムイオン二次電池用負極活物質の製造方法 |
KR100888685B1 (ko) | 2007-11-05 | 2009-03-13 | 주식회사 코캄 | 코어-쉘형 리튬 이차전지용 음극 활물질 및 그 제조방법과이를 포함하는 리튬 이차전지 |
KR101075028B1 (ko) * | 2008-04-24 | 2011-10-20 | 쇼와 덴코 가부시키가이샤 | 리튬 이차전지용 탄소 음극재 및 그 제조방법과 이를 이용한 리튬 이차전지 |
EP2450988A4 (en) | 2009-05-26 | 2014-06-04 | Kokam Co Ltd | ACTIVE ANODE MATERIAL FOR LITHIUM SECONDARY BATTERY, PREPARATION METHOD THEREFOR, AND LITHIUM SECONDARY BATTERY CONTAINING SAID MATERIAL |
KR101091547B1 (ko) | 2010-03-04 | 2011-12-13 | (주)포스코켐텍 | 리튬 이차전지용 탄소 음극재 및 그 제조방법과 이를 이용한 리튬 이차전지 |
CN102623684A (zh) * | 2012-04-18 | 2012-08-01 | 长沙理工大学 | 一种特殊壳层结构石墨基碳负极复合材料及制备方法 |
JP6252034B2 (ja) | 2012-08-23 | 2017-12-27 | 三菱ケミカル株式会社 | 非水系電解液二次電池用炭素材、非水系電解液二次電池用負極、非水系電解液二次電池、及び非水系電解液二次電池用炭素材の製造方法 |
JP2014067625A (ja) * | 2012-09-26 | 2014-04-17 | Sanyo Electric Co Ltd | 非水電解質二次電池 |
KR102371190B1 (ko) | 2015-04-06 | 2022-03-07 | 삼성에스디아이 주식회사 | 음극 및 이를 포함하는 이차전지 |
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KR20040044095A (ko) | 2002-11-19 | 2004-05-27 | 히다치 막셀 가부시키가이샤 | 비수 2차 전지용 음극, 비수 2차 전지, 비수 2차 전지용음극의 제조방법 및 비수 2차 전지를 사용한 전자기기 |
JP2005067081A (ja) * | 2003-08-26 | 2005-03-17 | C I Kasei Co Ltd | 熱可塑性樹脂製熱収縮性フィルムの製造装置及び製造方法 |
KR20050044770A (ko) | 2003-03-31 | 2005-05-12 | 세이미 케미칼 가부시끼가이샤 | 리튬 2차 전지용 양극활물질의 제조방법 |
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JP2001332263A (ja) * | 2000-03-16 | 2001-11-30 | Sony Corp | 二次電池および炭素系負極材料の製造方法 |
JP4308446B2 (ja) * | 2001-03-02 | 2009-08-05 | 三星エスディアイ株式会社 | 炭素質材料及びリチウム二次電池 |
KR100542184B1 (ko) * | 2001-07-19 | 2006-01-10 | 삼성에스디아이 주식회사 | 전지용 활물질 및 그의 제조 방법 |
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JP4974597B2 (ja) * | 2006-07-19 | 2012-07-11 | 日本カーボン株式会社 | リチウムイオン二次電池用負極及び負極活物質 |
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KR20040044095A (ko) | 2002-11-19 | 2004-05-27 | 히다치 막셀 가부시키가이샤 | 비수 2차 전지용 음극, 비수 2차 전지, 비수 2차 전지용음극의 제조방법 및 비수 2차 전지를 사용한 전자기기 |
KR20050044770A (ko) | 2003-03-31 | 2005-05-12 | 세이미 케미칼 가부시끼가이샤 | 리튬 2차 전지용 양극활물질의 제조방법 |
JP2005067081A (ja) * | 2003-08-26 | 2005-03-17 | C I Kasei Co Ltd | 熱可塑性樹脂製熱収縮性フィルムの製造装置及び製造方法 |
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US12206096B2 (en) | 2020-12-17 | 2025-01-21 | Sk On Co., Ltd. | Anode active material for secondary battery, secondary battery including the same, and method of preparing the same |
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KR20070078536A (ko) | 2007-08-01 |
JP4751988B2 (ja) | 2011-08-17 |
JP2007200868A (ja) | 2007-08-09 |
CN101009370A (zh) | 2007-08-01 |
US20070178382A1 (en) | 2007-08-02 |
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