KR20030050475A - 캐소드 전극, 이의 제조방법 및 이를 채용한 리튬 설퍼 전지 - Google Patents
캐소드 전극, 이의 제조방법 및 이를 채용한 리튬 설퍼 전지 Download PDFInfo
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- KR20030050475A KR20030050475A KR1020010080906A KR20010080906A KR20030050475A KR 20030050475 A KR20030050475 A KR 20030050475A KR 1020010080906 A KR1020010080906 A KR 1020010080906A KR 20010080906 A KR20010080906 A KR 20010080906A KR 20030050475 A KR20030050475 A KR 20030050475A
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- H01M4/36—Selection of substances as active materials, active masses, active liquids
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- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/136—Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
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- H01M4/02—Electrodes composed of, or comprising, active material
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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
- H01M4/621—Binders
- H01M4/622—Binders being polymers
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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
- H01M4/621—Binders
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- H—ELECTRICITY
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- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
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- H—ELECTRICITY
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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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Abstract
Description
설퍼/카본/바인더의조성비(wt) | 설퍼의함량(g) | 카본의함량(g) | 용매의사용량(g) | 6중량%바인더용액의사용량(g) | 결착력테스트 | |
실시예 1 | 70/20/10 | 7 | 2.0 | 66 | 16.7 | 박리 없음 |
실시예 2 | 70/20/5 | 7 | 2.0 | 66 | 8.4 | 박리 없음 |
실시예 3 | 70/20/3 | 7 | 2.0 | 66 | 5.0 | 박리 없음 |
실시예 4 | 70/20/1 | 7 | 2.0 | 66 | 1.7 | 박리 없음 |
설퍼/카본/바인더의조성비(wt) | 설퍼의함량(g) | 용매 1의사용량(g) | 카본의함량(g) | 용매 2의사용량(g) | 6중량%바인더용액의사용량(g) | 결착력테스트 | |
비교예 1 | 70/20/10 | 7 | 31 | 2.0 | 35 | 16.7 | 박리 없음 |
비교예 2 | 70/20/5 | 7 | 31 | 2.0 | 35 | 8.4 | 박리 |
비교예 3 | 70/20/3 | 7 | 31 | 2.0 | 35 | 5.0 | 박리 |
비교예 4 | 70/20/1 | 7 | 31 | 2.0 | 35 | 1.7 | 박리 |
Claims (14)
- 집전체상에 캐소드 활물질층이 적층된 캐소드 전극에 있어서,상기 캐소드 활물질층은,설퍼 및 폴리설파이드 중 하나 이상으로 이루어진 활물질 코아, 상기 활물질 코아의 표면에 코팅되어 있으며 도전제 입자로 이루어진 제1 코팅층, 및 상기 제1 코팅층에 코팅되어 있으며 바인더로 이루어진 제2 코팅층으로 이루어진 코아-셸 구조의 입자를 포함하는 것을 특징으로 하는 캐소드 전극.
- 제1항에 있어서, 상기 코아-셸 구조의 입자는 바인더에 의해 집전체 및 다른코아-셸 구조의 입자와 기계적 및 전기적으로 접촉된 것을 특징으로 하는 캐소드 전극.
- 제1항에 있어서, 상기 활물질의 표면을 덮고 있는 도전제는 전자 전도성을 가진 입자 또는 리튬 이온 전도성을 갖는 폴리머인 것을 특징으로 하는 캐소드 전극.
- 제3항에 있어서, 상기 도전제는 카본 분말인 것을 특징으로 하는 캐소드 전극.
- 제1항에 있어서, 상기 바인더는 폴리에틸렌옥사이드, 폴리비닐리덴 플루오라이드, 비닐리덴 플루오라이드와 헥사플루오로프로필렌의 공중합체, 및 폴리비닐리덴 플루오라이드와 스티렌-부타디엔 고무의 혼합물로 이루어진 군에서 선택된 하나 이상인 것을 특징으로 하는 캐소드 전극.
- 제1항에 있어서, 상기 설퍼 및 폴리설파이드 중 하나 이상으로 이루어진 활물질 코아는 상기 캐소드 활물질층의 중량을 기준으로 70 ~ 95중량%인 것을 특징으로 하는 캐소드 전극.
- 제1항 내지 제6항 중 어느 한 항에 따른 캐소드 전극을 포함하는 것을 특징으로 하는 리튬 설퍼 전지.
- (a) 설퍼 및 폴리설파이드 중 하나 이상의 캐소드 활물질 2 ~ 100 중량부와 도전성 물질 1 ~ 50 중량부를 용매 20 ~ 100중량부에 혼합하고 밀링하여 그 표면이 상기 도전성 물질의 입자층에 의하여 코팅된 상기 캐소드 활물질의 입자를 제조하는 단계; 및(b) 바인더 0.1 ~ 50 중량부가 용매 1 ~ 99.9 중량부에 용해된 바인더 용액을 상기 캐소드 활물질의 입자에 혼합하고 밀링하여 상기 캐소드 활물질 입자의 표면에 코팅된 상기 도전성 물질의 입자층이 다시 상기 바인더로 코팅된 캐소드 활물질 슬러리를 제조하는 단계를 포함하는 것을 특징으로 하는 캐소드 전극의 제조방법.
- 제8항에 있어서, 상기 (b)단계 이후에 상기 캐소드 활물질 슬러리를 집전체 상에 10 ~ 500㎛의 두께로 코팅하는 단계를 더 포함하는 것을 특징으로 하는 제조방법.
- 제8항에 있어서, 상기의 캐소드 활물질의 표면에 코팅된 도전제는 전자 전도성을 가진 입자 또는 리튬 이온 전도성을 갖는 폴리머인 것을 특징으로 하는 제조방법.
- 제10항에 있어서, 상기 도전제는 카본 분말인 것을 특징으로 하는 제조방법.
- 제8항에 있어서, 상기 바인더는 폴리에틸렌옥사이드, 폴리비닐리덴 플루오라이드, 비닐리덴 플루오라이드와 헥사플루오로프로필렌의 공중합체, 및 폴리비닐리덴 플루오라이드와 스티렌-부타디엔 고무의 혼합물로 이루어진 군에서 선택된 하나 이상인 것을 특징으로 하는 제조방법.
- 제8항에 있어서, 상기 (a) 단계 및 (b) 단계의 용매는 NMP, THF 및 아세토니트릴로 이루어진 군에서 선택된 하나 이상인 것을 특징으로 하는 제조방법.
- 제8항에 있어서, 상기 (b) 단계의 바인더 용매는 상기 (a) 단계의 용매와 동일한 것을 특징으로 하는 제조방법.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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KR10-2001-0080906A KR100416098B1 (ko) | 2001-12-18 | 2001-12-18 | 캐소드 전극, 이의 제조방법 및 이를 채용한 리튬 설퍼 전지 |
CNB021444242A CN1224120C (zh) | 2001-12-18 | 2002-09-27 | 阴极及其制备方法以及使用该阴极的锂硫电池 |
US10/259,293 US6908706B2 (en) | 2001-12-18 | 2002-09-30 | Cathode electrode, manufacturing method thereof and lithium sulfur battery using the same |
JP2002366929A JP3677267B2 (ja) | 2001-12-18 | 2002-12-18 | カソード電極、その製造方法及びこれを採用したリチウムサルファ電池 |
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KR10-2001-0080906A KR100416098B1 (ko) | 2001-12-18 | 2001-12-18 | 캐소드 전극, 이의 제조방법 및 이를 채용한 리튬 설퍼 전지 |
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KR20030050475A true KR20030050475A (ko) | 2003-06-25 |
KR100416098B1 KR100416098B1 (ko) | 2004-01-24 |
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US (1) | US6908706B2 (ko) |
JP (1) | JP3677267B2 (ko) |
KR (1) | KR100416098B1 (ko) |
CN (1) | CN1224120C (ko) |
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US9627688B2 (en) | 2014-01-06 | 2017-04-18 | Lg Chem, Ltd. | Anode for secondary battery and lithium secondary battery including same |
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US10734642B2 (en) | 2016-03-30 | 2020-08-04 | Global Graphene Group, Inc. | Elastomer-encapsulated particles of high-capacity anode active materials for lithium batteries |
US10777810B2 (en) | 2018-06-21 | 2020-09-15 | Global Graphene Group, Inc. | Lithium metal secondary battery containing a protected lithium anode |
US10818926B2 (en) | 2018-03-07 | 2020-10-27 | Global Graphene Group, Inc. | Method of producing electrochemically stable elastomer-encapsulated particles of anode active materials for lithium batteries |
US10854927B2 (en) | 2018-06-18 | 2020-12-01 | Global Graphene Group, Inc. | Method of improving cycle-life of alkali metal-sulfur secondary battery |
US10862129B2 (en) | 2017-04-12 | 2020-12-08 | Global Graphene Group, Inc. | Lithium anode-protecting polymer layer for a lithium metal secondary battery and manufacturing method |
US10862157B2 (en) | 2018-06-18 | 2020-12-08 | Global Graphene Group, Inc. | Alkali metal-sulfur secondary battery containing a conductive electrode-protecting layer |
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Also Published As
Publication number | Publication date |
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JP3677267B2 (ja) | 2005-07-27 |
CN1427491A (zh) | 2003-07-02 |
US6908706B2 (en) | 2005-06-21 |
KR100416098B1 (ko) | 2004-01-24 |
CN1224120C (zh) | 2005-10-19 |
JP2003208894A (ja) | 2003-07-25 |
US20030113627A1 (en) | 2003-06-19 |
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