KR101739294B1 - 리튬 이차 전지용 양극, 이를 포함하는 리튬 이차 전지 - Google Patents
리튬 이차 전지용 양극, 이를 포함하는 리튬 이차 전지 Download PDFInfo
- Publication number
- KR101739294B1 KR101739294B1 KR1020120022876A KR20120022876A KR101739294B1 KR 101739294 B1 KR101739294 B1 KR 101739294B1 KR 1020120022876 A KR1020120022876 A KR 1020120022876A KR 20120022876 A KR20120022876 A KR 20120022876A KR 101739294 B1 KR101739294 B1 KR 101739294B1
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- KR
- South Korea
- Prior art keywords
- positive electrode
- lithium
- secondary battery
- lithium secondary
- black
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 56
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 45
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 100
- 239000011230 binding agent Substances 0.000 claims description 45
- 239000004020 conductor Substances 0.000 claims description 32
- 229910052723 transition metal Inorganic materials 0.000 claims description 24
- -1 Lithium transition metal Chemical class 0.000 claims description 23
- 239000002905 metal composite material Substances 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 15
- 229910052799 carbon Inorganic materials 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 11
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 239000000839 emulsion Substances 0.000 claims description 8
- 229910013716 LiNi Inorganic materials 0.000 claims description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 5
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- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 3
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- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 6
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 6
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 6
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 5
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- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 2
- 229910013870 LiPF 6 Inorganic materials 0.000 description 2
- 239000002174 Styrene-butadiene Substances 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
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Images
Classifications
-
- 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
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
-
- 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
-
- 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
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
-
- 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
-
- 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
- H01M4/139—Processes of manufacture
- H01M4/1391—Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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Abstract
Description
도 2는 비교 제조예 1에 따른 양극 표면에 대한 전자 주사현미경 사진이다.
도 3은 제조예 2에 따른 양극 표면에 대한 전자 주사현미경 사진이다.
도 4는 제조예 3에 따른 양극 표면에 대한 전자 주사 현미경 사진이다.
상기 리튬 전이금속 복합 산화물은, 예를 들면 LiNi1-x-yCoxMnyO2 (여기서, x는 0<x<0.5이고, y는 0<y<0.5임)일 수 있다.
활물질 | 50중량%에서의 pH |
LiCoO2 | 11.47 |
Li[Ni1 /3Co1 /3Mn1 /3]O2 | 11.99 |
LiNi1 -x- yAlxMyO2 | 12.01 |
용량 유지율 @100C(%) |
|
실시예 1 | 82.7% |
실시예 2 | 81.7% |
실시예 3 | 79.8% |
실시예 4 | 79.5% |
실시예 5 | 78.5% |
실시예 6 | 77.8% |
비교예 1 | 65.5% |
비교예 2 | 66.3% |
114: 양극, 120: 전지 용기, 140: 봉입 부재
Claims (20)
- 리튬 전이금속 복합 산화물;
1270 m2/g 내지 1430 m2/g의 비표면적을 갖는 활성 탄소; 및
수계 바인더를 포함하며,
상기 리튬 전이금속 복합 산화물은 LiNi1-x-yCoxMnyO2 (여기서, x는 0<x<0.5이고, y는 0<y<0.5임)이며,
상기 수계 바인더는 아크릴 수지계 바인더를 포함하는 리튬 이차 전지용 양극. - 삭제
- 제1항에 있어서, 상기 활성 탄소의 함량이 상기 리튬 전이금속 복합 산화물 100 중량부에 대하여 1 내지 10 중량부인 리튬 이차 전지용 양극.
- 제1항에 있어서, 상기 활성 탄소의 함량이 상기 리튬 전이금속 복합 산화물 100 중량부에 대하여 1 내지 5 중량부인 리튬 이차 전지용 양극.
- 제1항에 있어서, 상기 활성 탄소의 평균 입경(D50)이 0.03 내지 20 ㎛인 리튬 이차 전지용 양극.
- 제1항에 있어서, 상기 활성 탄소의 평균 입경(D50)이 5 내지 15 ㎛인 리튬 이차 전지용 양극.
- 제1항에 있어서, 상기 활성 탄소의 평균 입경(D50)이 10㎛인 리튬 이차 전지용 양극.
- 삭제
- 제1항에 있어서, 상기 리튬 전이금속 복합 산화물의 pH가 11 내지 13인 리튬 이차 전지용 양극.
- 제1항에 있어서, 상기 수계 바인더가 아크릴계 공중합 에멀젼을 포함하는 리튬 이차 전지용 양극.
- 제1항에 있어서, 상기 양극은 상기 리튬 전이금속 복합 산화물 100 중량부에 대하여 1 내지 5 중량부 함량의 도전재를 더 포함하는 리튬 이차 전지용 양극.
- 제11항에 있어서, 상기 도전재가 그래파이트, 천연 흑연, 인조 흑연, 카본 블랙, 아세틸렌 블랙, 덴카 블랙, 케첸 블랙, 채널 블랙(channel black), 퍼네이스 블랙(furnace black), 램프 블랙(lamp black), 도전성 섬유, 탄소 섬유, 금속 섬유, 금속 분말, 불화 카본 분말(fluorocarbon powder), 알루미늄 분말, 니켈 분말, 도전성 위스키, 산화아연, 티탄산 칼륨, 도전성 금속 산화물, 산화 티탄, 및 폴리페닐렌 유도체로 이루어진 군으로부터 선택된 1종 이상인 리튬 이차 전지용 양극.
- 양극; 음극; 및 세퍼레이터;를 포함하고,
상기 양극은 제1항에 따른 양극을 포함하는 리튬 이차 전지. - 삭제
- 삭제
- 삭제
- 삭제
- 삭제
- 삭제
- 제13항에 있어서, 상기 양극은 도전재를 더 포함하고, 상기 도전재가 그래파이트, 천연 흑연, 인조 흑연, 카본 블랙, 아세틸렌 블랙, 덴카 블랙, 케첸 블랙, 채널 블랙(channel black), 퍼네이스 블랙(furnace black), 램프 블랙(lamp black), 도전성 섬유, 탄소 섬유, 금속 섬유, 금속 분말, 불화 카본 분말(fluorocarbon powder), 알루미늄 분말, 니켈 분말, 도전성 위스키, 산화아연, 티탄산 칼륨, 도전성 금속 산화물, 산화 티탄, 및 폴리페닐렌 유도체로 이루어진 군으로부터 선택된 1종 이상인 리튬 이차 전지.
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