KR102536581B1 - 비수계 전해액 및 비수계 이차 전지 - Google Patents
비수계 전해액 및 비수계 이차 전지 Download PDFInfo
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- KR102536581B1 KR102536581B1 KR1020207036866A KR20207036866A KR102536581B1 KR 102536581 B1 KR102536581 B1 KR 102536581B1 KR 1020207036866 A KR1020207036866 A KR 1020207036866A KR 20207036866 A KR20207036866 A KR 20207036866A KR 102536581 B1 KR102536581 B1 KR 102536581B1
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- KR
- South Korea
- Prior art keywords
- electrolyte solution
- positive electrode
- aqueous
- lithium
- secondary battery
- Prior art date
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- 239000011255 nonaqueous electrolyte Substances 0.000 title claims abstract description 146
- -1 polycyclic heterocyclic compound Chemical class 0.000 claims abstract description 126
- 239000003125 aqueous solvent Substances 0.000 claims abstract description 70
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- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 246
- 229910003002 lithium salt Inorganic materials 0.000 claims description 102
- 159000000002 lithium salts Chemical class 0.000 claims description 102
- 229910052744 lithium Inorganic materials 0.000 claims description 63
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 61
- 238000000034 method Methods 0.000 claims description 39
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- 125000004432 carbon atom Chemical group C* 0.000 claims description 22
- 150000008065 acid anhydrides Chemical class 0.000 claims description 17
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- MUTGBJKUEZFXGO-UHFFFAOYSA-N hexahydrophthalic anhydride Chemical compound C1CCCC2C(=O)OC(=O)C21 MUTGBJKUEZFXGO-UHFFFAOYSA-N 0.000 claims description 3
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- XHGIFBQQEGRTPB-UHFFFAOYSA-N tris(prop-2-enyl) phosphate Chemical compound C=CCOP(=O)(OCC=C)OCC=C XHGIFBQQEGRTPB-UHFFFAOYSA-N 0.000 description 1
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Abstract
1. 축합 다환 복소환 화합물이고,
2. 상기 축합 다환 복소환 내에 피리미딘 골격을 함유하고,
3. 상기 축합 다환 복소환 내에 질소 원자를 3개 이상 함유하고,
4. 상기 축합 다환 복소환 내에 sp2 탄소를 5개 이상 함유하고,
5. 상기 축합 다환 복소환 내의 상기 질소 원자에 수소 원자가 결합하고 있지 않은 것
을 충족하는 구조를 갖는 1종류 이상의 화합물을 함유하는 비수계 전해액이 제공된다.
Description
도 2는 도 1의 비수계 이차 전지의 A-A선 단면도이다.
110 : 전지 외장
120 : 전지 외장의 공간
130 : 정극 리드체
140 : 부극 리드체
150 : 정극
160 : 부극
170 : 세퍼레이터
Claims (20)
- 제1항에 있어서, 상기 축합 다환 복소환 화합물의 함유량이, 상기 비수계 전해액의 전량을 기준으로 해서 0.01질량% 이상 10질량% 이하인, 비수계 전해액.
- 제1항 또는 제2항에 있어서, 환상 산 무수물을 함유하는, 비수계 전해액.
- 제3항에 있어서, 상기 환상 산 무수물이 말론산 무수물, 무수 숙신산, 글루타르산 무수물, 무수 말레산, 무수 프탈산, 1,2-시클로헥산디카르복실산 무수물, 2,3-나프탈렌디카르복실산 무수물 및 나프탈렌-1,4,5,8-테트라카르복실산 이무수물로 이루어지는 군에서 선택되는 적어도 1종을 포함하는, 비수계 전해액.
- 제3항에 있어서, 상기 환상 산 무수물의 함유량이, 상기 비수계 전해액 100질량부에 대하여 0.01 내지 10질량부인, 비수계 전해액.
- 제1항에 있어서, 상기 LiPF6의 함유량은 상기 비수계 용매에 대하여 0.01몰/L 이상 0.1몰/L 미만인, 비수계 전해액.
- 제1항 또는 제6항에 있어서, 상기 LiPF6에 대한 상기 리튬 함유 이미드염의 몰비는 10보다 큰, 비수계 전해액.
- 제1항, 제2항 및 제6항 중 어느 한 항에 있어서, 상기 리튬 함유 이미드염은 리튬비스(플루오로술포닐)이미드를 포함하는, 비수계 전해액.
- 제1항, 제2항 및 제6항 중 어느 한 항에 기재된 비수계 전해액을 포함하는, 비수계 이차 전지.
- 제9항에 있어서, Fe가 포함되는 올리빈 결정 구조의 리튬 인 금속 화합물을 함유하는 정극과,
흑연, 또는 Ti, V, Sn, Cr, Mn, Fe, Co, Ni, Zn, Al, Si 및 B로 이루어지는 군에서 선택되는 1종 이상의 원소를 함유하는 부극
을 구비하는, 비수계 이차 전지. - 제10항에 있어서, 상기 정극의 편면당의 단위 면적당 중량이 15㎎/㎠ 이상인, 비수계 이차 전지.
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CN115483433B (zh) * | 2022-10-08 | 2024-01-26 | 厦门海辰储能科技股份有限公司 | 电解液、电池、用电设备 |
CN117613389B (zh) * | 2024-01-24 | 2024-04-19 | 上海瑞浦青创新能源有限公司 | 电解液添加剂、锂离子电池用电解液和锂离子电池 |
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