KR101698763B1 - 음극 활물질, 그 제조방법, 이를 포함하는 전극 및 이를 채용한 리튬 이차 전지 - Google Patents
음극 활물질, 그 제조방법, 이를 포함하는 전극 및 이를 채용한 리튬 이차 전지 Download PDFInfo
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- KR101698763B1 KR101698763B1 KR1020120143028A KR20120143028A KR101698763B1 KR 101698763 B1 KR101698763 B1 KR 101698763B1 KR 1020120143028 A KR1020120143028 A KR 1020120143028A KR 20120143028 A KR20120143028 A KR 20120143028A KR 101698763 B1 KR101698763 B1 KR 101698763B1
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 36
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- 238000002360 preparation method Methods 0.000 title description 11
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- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
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Abstract
Description
도 2 내지 도 6은 실시예 1-5에 따라 제조된 음극 활물질의 전자주사현미경 사진으로서
도 7a 내지 도 7d는 실시예 6에 따라 제조된 음극 활물질의 전자주사현미경 사진이며,
도 8a 내지 도 8c는 실시예 1에 따라 얻은 음극 활물질의 전자주사현미경 사진이고,
도 9는 실시예 1에 따라 얻은 음극 활물질의 투과 전자 현미경 사진이고,
도 10 내지 도 12는 도 9의 A 영역 및 B 영역을 각각 확대하여 나타낸 투과 전자 현미경 사진이고,
도 13은 실시예 1에 따라 얻은 음극 활물질의 X선 회절 스펙트럼이고,
도 14는 실시예 1, 실시예 2, 실시예 3, 실시예 5, 실시예 6 및 비교예 1에 따라 코인셀에 있어서, 용량에 따른 셀 포텐셜 특성을 나타낸 것이다.
니켈(Ni)(중량%) | 분석결과 | |
실시예 1 | 0.5 | 0.45 |
실시예 2 | 1 | 1.02 |
실시예 3 | 2 | 1.98 |
실시예 4 | 4 | 4.10 |
실시예 5 | 5 | 5.07 |
실시예 6 | 0.5 | 0.52 |
비교예 1 | - | 0.54 |
구분 | 실리콘(Si) (중량%) | 산소(O) (중량%) | 탄소(C) (중량%) |
실시예 1 | 60~63 | 27~35 | 5~10 |
실시예 2 | 63~66 | 24~32 | 5~10 |
실시예 3 | 67~70 | 20~28 | 5~10 |
실시예 4 | 70~73 | 17~25 | 5~10 |
실시예 5 | 73~76 | 14~22 | 5~10 |
실시예 6 | 62~65 | 25~32 | 5~10 |
비교예 1 | 63~66 | 24~32 | 5~10 |
1st 사이클 방전용량 [mAh/g] |
초기 충방전 효율 [%] |
용량 유지율 [%] |
|
제작예 1 | 1420 | 56 | 60 |
제작예 2 | 1450 | 60 | 70 |
제작예 5 | 1810 | 70 | 78 |
비교제작예 1 | 1390 | 53 | 55 |
제작예 4 | 1580 | 65 | 75 |
제작예 3 | 1480 | 62 | 73 |
13.. 양극 14.. 세퍼레이터
15.. 전지 케이스 16.. 캡 어셀블리
Claims (20)
- 비정질 산화실리콘, 결정질 실리콘, 탄소 및 규화금속을 포함하는 음극 활물질로서,
상기 음극 활물질이 구형 입자와 휘스커 형상을 갖고,
상기 휘스커가 비정질 실리콘 산화물, 결정질 실리콘 및 규화금속을 포함하고,
상기 구형 입자가 비정질 실리콘 산화물 및 결정질 실리콘을 포함하는 음극 활물질. - 제1항에 있어서,
상기 규화금속이 규화니켈, 규화티탄, 규화티탄, 규화구리 및 규화철로 이루어진 군으로부터 선택된 하나 이상인 음극 활물질. - 제1항에 있어서,
상기 규화금속의 함량이 음극 활물질 총중량 100 중량부를 기준으로 하여 0.5 내지 10 중량부인 음극 활물질. - 삭제
- 삭제
- 제1항에 있어서,
상기 구형 입자의 평균입경은,
5 내지 15㎛인 음극 활물질. - 제1항에 있어서,
상기 휘스커의 길이는 1 내지 5㎛이고,
상기 휘스커의 두께는 10 내지 20nm인 음극 활물질. - 제1항에 있어서,
비구형 입자를 더 함유하는 음극 활물질. - 제1항에 있어서,
상기 음극 활물질에서 산화실리콘의 함량은,
음극 활물질의 총중량 100 중량부를 기준으로 하여 70 내지 90 중량부인 음극 활물질. - 제1항에 있어서,
상기 음극 활물질에서 탄소의 함량은 음극 활물질의 총중량 100 중량부를 기준으로 하여 1 내지 10 중량부인 음극 활물질. - 제1항에 있어서,
상기 음극 활물질에서 실리콘의 함량은
음극 활물질의 총중량 100 중량부를 기준으로 하여 10 내지 20 중량부인 음극 활물질. - 제1항에 있어서,
탄소계 물질로 된 코팅막이 더 형성된 음극 활물질. - 삭제
- 삭제
- 삭제
- 삭제
- 삭제
- 삭제
- 삭제
- 제1항, 제2항, 제3항, 제6항 내지 제12항 중 어느 한 항의 음극 활물질을 포함하는 음극을 포함하는 리튬 이차 전지.
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US13/831,443 US9123952B2 (en) | 2012-12-10 | 2013-03-14 | Negative electrode active material, method of preparing the same, negative electrode and lithium secondary battery employing the electrode including the negative electrode active material |
EP13185707.0A EP2741350B1 (en) | 2012-12-10 | 2013-09-24 | Negative electrode active material, method of preparing the same, negative electrode and lithium secondary battery employing the electrode including the negative electrode active material |
CN201310586892.3A CN103872297B (zh) | 2012-12-10 | 2013-11-20 | 负极活性物质、其制备方法、和含其的锂二次电池 |
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