KR102228109B1 - 리튬 이차 전지용 정극 활물질, 리튬 이차 전지용 정극, 및 리튬 이차 전지 - Google Patents
리튬 이차 전지용 정극 활물질, 리튬 이차 전지용 정극, 및 리튬 이차 전지 Download PDFInfo
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Abstract
(1) 상기 리튬 함유 복합 금속 산화물이, 식 (A) 로 나타내는 α-NaFeO2 형의 결정 구조를 갖는다.
Lia(NibCocM1 1-b-c)O2···(A)
(2) 상기 피복층이, Li 와 M2 의 금속 복합 산화물을 포함한다.
(3) 상기 리튬 이차 전지용 정극 활물질의 평균 이차 입자 직경이 2 ㎛ 이상 20 ㎛ 이하이고, BET 비표면적이 0.1 ㎡/g 이상 2.5 ㎡/g 이하이며, 중장 밀도를 경장 밀도로 나눈 값이 1.0 이상 2.0 이하이다.
Description
도 1b 는, 리튬 이차 전지의 일례를 나타내는 개략 구성도이다.
2 : 정극
3 : 부극
4 : 전극군
5 : 전지캔
6 : 전해액
7 : 탑 인슐레이터
8 : 봉구체
10 : 리튬 이차 전지
21 : 정극 리드
31 : 부극 리드
Claims (10)
- 리튬 이온을 도프 및 탈도프 가능한 일차 입자가 응집하여 이루어지는 이차 입자로 이루어지는 리튬 함유 복합 금속 산화물의 표면에, 피복층을 구비한 리튬 이차 전지용 정극 활물질로서, 하기 요건 (1) ∼ (3) 을 만족하는 것을 특징으로 하는 리튬 이차 전지용 정극 활물질.
(1) 상기 리튬 함유 복합 금속 산화물이, 식 (A) 로 나타내는 α-NaFeO2 형의 결정 구조를 갖는다.
Lia(NibCocM1 1-b-c)O2···(A)
(식 중, 0.95 ≤ a ≤ 1.2, 0.9 ≤ b < 1, 0 < c ≤ 0.1, 0.9 < b + c ≤ 1 이고,
M1 은 Mg, Al, Ca, Sc, Ti, V, Cr, Mn, Fe, Cu, Zn, Ga, Ge, Sr, Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, In 및 Sn 으로 이루어지는 군에서 선택되는 적어도 1 종의 임의 금속을 나타낸다.)
(2) 상기 피복층이, Li 와 M2 (M2 는 Al, Ti, Zr 및 W 로 이루어지는 군에서 선택되는 적어도 1 종의 임의 금속을 나타낸다.) 의 금속 복합 산화물을 포함한다.
(3) 상기 리튬 이차 전지용 정극 활물질의 평균 이차 입자 직경이 2 ㎛ 이상 20 ㎛ 이하이고, BET 비표면적이 0.1 ㎡/g 이상 2.5 ㎡/g 이하이며, 중장 밀도를 경장 밀도로 나눈 값이 1.0 이상 2.0 이하이다. - 제 1 항에 있어서,
M1 은 Mg, Al, Ca, Ti, Mn, Zn, Ga, Zr 및 Sn 으로 이루어지는 군에서 선택되는 적어도 1 종인, 리튬 이차 전지용 정극 활물질. - 제 1 항에 있어서,
M1 은 Mg, Al, Mn, Zn 및 Sn 으로 이루어지는 군에서 선택되는 적어도 1 종인, 리튬 이차 전지용 정극 활물질. - 제 1 항에 있어서,
중장 밀도가 1.0 g/㎤ 이상 3.5 g/㎤ 이하인, 리튬 이차 전지용 정극 활물질. - 제 1 항에 있어서,
입도 분포 측정값으로부터 구한 90 % 누적 직경 (D90)/10 % 누적 직경 (D10) 의 값이 1 이상 5 이하인, 리튬 이차 전지용 정극 활물질. - 제 1 항에 있어서,
Ni 와 Co 와 M1 의 원자비의 합에 대한 M2 의 원자비의 비율이 0.1 ∼ 5 % 인, 리튬 이차 전지용 정극 활물질. - 제 1 항에 있어서,
M2 가 Al 인, 리튬 이차 전지용 정극 활물질. - 제 7 항에 있어서,
피복층이 알루민산리튬인, 리튬 이차 전지용 정극 활물질. - 제 1 항 내지 제 8 항 중 어느 한 항에 기재된 리튬 이차 전지용 정극 활물질을 갖는, 리튬 이차 전지용 정극.
- 제 9 항에 기재된 리튬 이차 전지용 정극을 갖는, 리튬 이차 전지.
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JPJP-P-2014-012835 | 2014-01-27 | ||
JP2014012835 | 2014-01-27 | ||
PCT/JP2015/051992 WO2015111740A1 (ja) | 2014-01-27 | 2015-01-26 | リチウム二次電池用正極活物質、リチウム二次電池用正極、及びリチウム二次電池 |
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US (1) | US11557754B2 (ko) |
EP (1) | EP3101716B1 (ko) |
JP (1) | JP6026679B2 (ko) |
KR (1) | KR102228109B1 (ko) |
CN (2) | CN105917500B (ko) |
WO (1) | WO2015111740A1 (ko) |
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