KR20190089831A - 황-탄소 복합체 및 이를 포함하는 리튬-황 전지 - Google Patents
황-탄소 복합체 및 이를 포함하는 리튬-황 전지 Download PDFInfo
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- KR20190089831A KR20190089831A KR1020190090315A KR20190090315A KR20190089831A KR 20190089831 A KR20190089831 A KR 20190089831A KR 1020190090315 A KR1020190090315 A KR 1020190090315A KR 20190090315 A KR20190090315 A KR 20190090315A KR 20190089831 A KR20190089831 A KR 20190089831A
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- South Korea
- Prior art keywords
- sulfur
- carbon
- lithium
- carbon composite
- porous
- Prior art date
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- 150000001721 carbon Chemical class 0.000 description 1
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- 238000009792 diffusion process Methods 0.000 description 1
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Images
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- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
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- H01M4/00—Electrodes
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Abstract
본 발명은 황이 다공성 탄소재의 기공 내부에 빈 공간 없이 고르게 충진되며 다공성 탄소재의 표면에도 고르게 분포하여 전극의 성능을 개선할 뿐만 아니라 이를 포함하는 리튬-황 전지의 용량, 안정성 및 수명 특성을 개선시킬 수 있다.
Description
도 2는 본 발명의 비교예 1에 따라 제조된 황-탄소 복합체의 SEM 사진이다.
도 3은 본 발명의 실시예 1에 따라 제조된 황-탄소 복합체의 열물성 분석 결과를 나타낸 그래프이다.
도 4는 본 발명의 실시예1 및 비교예 1을 적용하여 제조한 리튬-황 전지 코인 셀의 충방전 특성 결과를 나타낸 그래프이다.
유기 용매 | 끓는점 (℃) |
이소아밀프로피오네이트 | 156 |
에틸에톡시아세테이트 | 156 |
2-에톡시에틸아세테이트 | 156 |
2-메틸-3-헵타논 | 159 |
에틸-3-메톡시프로피오네이트 | 158 |
2-메톡시 에틸에테르 | 162 |
3-메톡시 부틸아세테이트 | 170 |
2-에톡시에틸 에테르 | 185 |
2-부톡시에탄올 | 171 |
3-에톡시-프로판올 | 161 |
디에틸렌글리콜도데실에테르 | 169 |
디프로필렌글리콜메틸에테르 | 188 |
2,6-디메틸-4 -헵타논 | 169 |
2-옥타논 | 173 |
3-옥타논 | 168 |
3-노나논 | 188 |
5-노나논 | 187 |
4-히드록시-4-메틸-2-펜타논 | 166 |
2-메틸시클로헥사논 | 163 |
3-메틸시클로헥사논 | 170 |
4-메틸시클로헥사논 | 170 |
2,6-디메틸시클로헥사논 | 175 |
2,2,6-트리메틸시클로헥사논 | 179 |
시클로햅타논 | 179 |
헥실아세테이트 | 169 |
아밀부티레이트 | 185 |
이소프로필락테이트 | 167 |
부틸락테이트 | 186 |
에틸-3-히드록시부티레이트 | 170 |
에틸-3-에톡시프로피오네이트 | 170 |
에틸-3-히드록시 부티레이트 | 180 |
프로필-2-히드록시-프로피오네이트 | 169 |
프로필렌글리콜 디아세테이트 | 186 |
프로필렌글리콜 부틸에테르 | 170 |
프로필렌글리콜 메틸에테르 프로피오네이트 | 160 |
디에틸렌글리콜 디메틸에테르 | 162 |
디에틸렌글리콜 디메틸에테르아세테이트 | 165 |
디프로필렌글리콜 메틸에테르 | 188 |
디프로필렌글리콜 디메틸에테르 | 171 |
에틸렌글리콜 부틸에테르 | 171 |
디에틸렌글리콜 메틸에틸에테르 | 176 |
디에틸렌글리콜 메틸이소프로필에테르 | 179 |
에틸렌글리콜 디에틸에테르 | 189 |
부틸부티레이트 | 165 |
디에틸렌글리콜 모노메틸에테르 | 194 |
4-에틸시클로헥사논 | 193 |
2-부톡시에틸아세테이트 | 192 |
디에틸렌글리콜 모노에틸에테르 | 202 |
γ-부티로락톤 | 204 |
헥실부티레이트 | 205 |
디에틸렌글리콜 메틸에테르아세테이트 | 209 |
디에틸렌글리콜 부틸 메틸에테르 | 212 |
N-메틸-2-피롤리돈 | 212 |
트리프로필글리콜 디메틸에테르 | 215 |
트리에틸렌글리콜 디메틸에테르 | 216 |
디에틸렌글리콜 에틸에테르아세테이트 | 217 |
디에틸렌글리콜 부틸에테르아세테이트 | 245 |
3-에폭시-1,2-프로판디올 | 222 |
에틸-4-아세틸부티레이트 | 222 |
디에틸렌글리콜 모노부틸에테르 | 231 |
트리프로필글리콜 메틸에테르 | 242 |
디에틸렌글리콜 | 245 |
2-(2-부톡시에톡시)에틸아세테이트 | 245 |
카테콜 | 245 |
트리에틸렌글리콜 메틸에테르 | 249 |
디에틸렌글리콜 디부틸에테르 | 256 |
트리에틸렌글리콜 에틸에테르 | 256 |
디에틸렌글리콜 모노헥틸에테르 | 260 |
트리에틸렌글리콜 부틸메틸에테르 | 261 |
트리에틸렌글리콜 부틸에테르 | 271 |
트리프로필렌글리콜 | 273 |
테트라에틸렌글리콜 디메틸에테르 | 276 |
에틸렌 카보네이트 | 248 |
프로필렌 카보네이트 | 204 |
설포란 | 285 |
Claims (11)
- 내부에 유기 용매가 0.005 내지 5 중량%로 잔류하는 것을 특징으로 하는 황-탄소 복합체.
- 제1항에 있어서,
상기 유기 용매는 끓는점이 155 내지 300 ℃인 것을 특징으로 하는 황-탄소 복합체. - 제1항에 있어서,
상기 유기 용매는 케톤계, 에테르계, 에스테르계, 알코올계, 술폭시화물계 및 아미드계로 이루어진 군으로부터 선택된 1종 이상인 것을 특징으로 하는 황-탄소 복합체. - 제1항에 있어서,
상기 황-탄소 복합체는
다공성 탄소재; 및
그 기공 내부 또는 표면에 황을 포함하는 것을 특징으로 하는 황-탄소 복합체. - 제4항에 있어서,
상기 다공성 탄소재는 다공성 탄소재로는 그래파이트, 그래핀, 카본 블랙, 탄소나노튜브, 탄소 섬유 및 메조포러스 탄소로 이루어진 군으로부터 선택된 1종 이상인 것을 특징으로 하는 황-탄소 복합체. - 제4항에 있어서,
상기 다공성 탄소재의 기공의 평균 직경은 1 내지 200 ㎚인 것을 특징으로 하는 황-탄소 복합체. - 제4항에 있어서,
상기 다공성 탄소재의 기공도는 다공성 탄소재의 전체 체적의 10 내지 90 %인 것을 특징으로 하는 황-탄소 복합체. - 제4항에 있어서,
상기 황은 무기 황(S8), Li2Sn(n ≥ 1), 유기 황 화합물 및 탄소-황 폴리머[(C2Sx)n, x=2.5 내지 50, n ≥ 2]로 이루어진 군으로부터 선택된 1종 이상인 것을 특징으로 하는 황-탄소 복합체. - 제4항에 있어서,
상기 다공성 탄소재와 황의 중량비는 1:9 내지 5:5인 것을 특징으로 하는 황-탄소 복합체. - 제1항에 따른 황-탄소 복합체를 포함하는 리튬-황 전지용 양극.
- 제1항에 따른 황-탄소 복합체를 포함하는 양극;
음극; 및
상기 양극과 음극 사이에 개재된 전해질을 포함하는 리튬-황 전지.
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