KR102324996B1 - 전고체형 리튬 이차전지용 양극 활물질 - Google Patents
전고체형 리튬 이차전지용 양극 활물질 Download PDFInfo
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Abstract
Description
Claims (12)
- 전고체형 리튬 이차전지에 사용하는 양극 활물질로서, 리튬 함유 복합 산화물(「본 코어 입자」라 한다)의 표면이, Li, A(A는 Ti, Zr, Ta, Nb, Zn, W 및 Al로 이루어지는 군에서 선택된 1종 또는 2종 이상의 원소) 및 O를 포함하는 화합물(「LiAO 화합물」이라 한다)로 피복되며, 또한, 본 코어 입자의 표면에 할로겐이 존재하고, 상기 할로겐은, 상기 LiAO 화합물에 고용(固溶) 하여 있는 것을 특징으로 하는 전고체형 리튬 이차전지용 양극 활물질.
- 제1항에 있어서,
단, 불소를 함유하는 고체 전해질 재료와 접촉하여 비로소 본 코어 입자의 표면에 불화물이 형성되는 양극 활물질을 제외하는, 전고체형 리튬 이차전지용 양극 활물질. - 제1항 또는 제2항에 있어서,
상기 LiAO 화합물은 LixAOy로 나타나고, 상기 x는 1<x를 만족시키며, 상기 y는 원소의 가수에 의거한 범위 내의 값인, 전고체형 리튬 이차전지용 양극 활물질. - 제1항 또는 제2항에 있어서,
비행시간형 이차이온 질량 분석법(TOF-SIMS)을 사용하여, 이차이온 극성을 음의 조건에 의해서 측정되는, 본 코어 입자의 표면으로부터 모은 이차이온의 모든 카운트수의 합계(total)에 대한, 할로겐이온에 관한 이차이온종의 카운트수(Ha-)의 비율(Ha-/total)이 0.00075 이상인 것을 특징으로 하는 전고체형 리튬 이차전지용 양극 활물질. - 제1항 또는 제2항에 있어서,
양극 활물질을 전용해(全溶解)해서 유도 결합 플라스마(ICP) 발광 분광 분석에 의해 측정되는 A 원소량(wt%)에 대한, 양극 활물질을 가열 분해한 후 이온 크로마토그래피에 의해 측정되는 할로겐(Ha)양(ppm)의 질량 비율(Ha/A)이 0.5×10-4 이상인 것을 특징으로 하는 전고체형 리튬 이차전지용 양극 활물질. - 제1항 또는 제2항에 있어서,
X선 광전자 분광 분석(XPS)에 의해서 측정되는, 본 코어 입자의 표면에 존재하는 A 원소량에 대한 할로겐(Ha)양의 mol 비율(Ha/A)×100이 1.1 이상인 것을 특징으로 하는 전고체형 리튬 이차전지용 양극 활물질. - 제1항 또는 제2항에 있어서,
할로겐이 F(불소)인, 전고체형 리튬 이차전지용 양극 활물질. - 제1항 또는 제2항에 있어서,
X선 광전자 분광 분석(XPS)에 의해서 측정되는, 본 코어 입자의 표면에 존재하는 A 원소량에 대한, Li 원소량의 mol 비율(Li/A)이 1.5∼33.3인 것을 특징으로 하는 전고체형 리튬 이차전지용 양극 활물질. - 제1항 또는 제2항에 있어서,
상기 리튬 함유 복합 산화물은, 일반식 LiMO2(M은 금속 원소)로 표시되는 층상 암염 구조의 리튬 함유 복합 산화물인 것을 특징으로 하는 전고체형 리튬 이차전지용 양극 활물질. - 제1항 또는 제2항에 있어서,
상기 LiAO 화합물은, 비정질 화합물인 것을 특징으로 하는 전고체형 리튬 이차전지용 양극 활물질. - 제1항 또는 제2항에 기재된 양극 활물질과, 고체 전해질과, 음극 활물질을 갖는 전고체형 리튬 이차전지.
- 제11항에 있어서,
상기 고체 전해질은, 황(S)을 포함하는 황화물계 고체 전해질인 것을 특징으로 하는 전고체형 리튬 이차전지.
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KR102376785B1 (ko) * | 2019-02-27 | 2022-03-21 | 미쓰이금속광업주식회사 | 활물질, 그것을 사용한 정극 합제 및 고체 전지 |
WO2020249659A1 (en) | 2019-06-13 | 2020-12-17 | Basf Se | Coated particulate material comprising complex layered oxide for use as electrode active material, respective methods of making and uses thereof |
WO2021006125A1 (ja) * | 2019-07-08 | 2021-01-14 | 住友金属鉱山株式会社 | リチウムイオン二次電池用正極活物質およびリチウムイオン二次電池 |
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- 2018-08-10 WO PCT/JP2018/030030 patent/WO2019035418A1/ja unknown
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US11824188B2 (en) | 2023-11-21 |
JP6928659B2 (ja) | 2021-09-01 |
JPWO2019035418A1 (ja) | 2019-12-19 |
KR20200020821A (ko) | 2020-02-26 |
CN110998930A (zh) | 2020-04-10 |
EP3671916A1 (en) | 2020-06-24 |
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WO2019035418A1 (ja) | 2019-02-21 |
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