KR102429591B1 - 음극 및 이를 포함하는 이차전지 - Google Patents
음극 및 이를 포함하는 이차전지 Download PDFInfo
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- KR102429591B1 KR102429591B1 KR1020180121540A KR20180121540A KR102429591B1 KR 102429591 B1 KR102429591 B1 KR 102429591B1 KR 1020180121540 A KR1020180121540 A KR 1020180121540A KR 20180121540 A KR20180121540 A KR 20180121540A KR 102429591 B1 KR102429591 B1 KR 102429591B1
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- active material
- negative electrode
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- 239000002245 particle Substances 0.000 claims abstract description 45
- 239000000654 additive Substances 0.000 claims abstract description 38
- 230000000996 additive effect Effects 0.000 claims abstract description 31
- 229910000664 lithium aluminum titanium phosphates (LATP) Inorganic materials 0.000 claims abstract description 17
- 239000006183 anode active material Substances 0.000 claims abstract description 15
- 239000005279 LLTO - Lithium Lanthanum Titanium Oxide Substances 0.000 claims abstract description 7
- 239000007773 negative electrode material Substances 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 8
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- 239000002391 graphite-based active material Substances 0.000 claims description 5
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- 230000000052 comparative effect Effects 0.000 description 49
- 229910052744 lithium Inorganic materials 0.000 description 19
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 17
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 6
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- SBLRHMKNNHXPHG-UHFFFAOYSA-N 4-fluoro-1,3-dioxolan-2-one Chemical compound FC1COC(=O)O1 SBLRHMKNNHXPHG-UHFFFAOYSA-N 0.000 description 2
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 2
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- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 2
- 229920002125 Sokalan® Polymers 0.000 description 2
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- TZIHFWKZFHZASV-UHFFFAOYSA-N methyl formate Chemical compound COC=O TZIHFWKZFHZASV-UHFFFAOYSA-N 0.000 description 2
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- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- 150000003624 transition metals Chemical class 0.000 description 2
- HFZLSTDPRQSZCQ-UHFFFAOYSA-N 1-pyrrolidin-3-ylpyrrolidine Chemical compound C1CCCN1C1CNCC1 HFZLSTDPRQSZCQ-UHFFFAOYSA-N 0.000 description 1
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 1
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- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 1
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- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- RJUFJBKOKNCXHH-UHFFFAOYSA-N Methyl propionate Chemical compound CCC(=O)OC RJUFJBKOKNCXHH-UHFFFAOYSA-N 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- 229910017246 Ni0.8Co0.1Mn0.1 Inorganic materials 0.000 description 1
- 229920000265 Polyparaphenylene Polymers 0.000 description 1
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- 229910008326 Si-Y Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910006773 Si—Y Inorganic materials 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 1
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- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
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- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 229910052795 boron group element Inorganic materials 0.000 description 1
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- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 1
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- MJEMIOXXNCZZFK-UHFFFAOYSA-N ethylone Chemical compound CCNC(C)C(=O)C1=CC=C2OCOC2=C1 MJEMIOXXNCZZFK-UHFFFAOYSA-N 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
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- WBJINCZRORDGAQ-UHFFFAOYSA-N formic acid ethyl ester Natural products CCOC=O WBJINCZRORDGAQ-UHFFFAOYSA-N 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
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- H01M2004/021—Physical characteristics, e.g. porosity, surface area
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Abstract
Description
도 2는 본 발명의 비교예 1, 비교예 3, 비교예 4에 따른 음극을 사용한 전지들의 저온 출력 특성을 나타낸 그래프이다.
도 3은 본 발명의 실시예 1, 비교예 1, 비교예 2에 따른 음극을 사용한 전지들의 용량 특성을 나타낸 그래프이다.
도 4는 본 발명의 비교예 1, 비교예 3, 비교예 4에 따른 음극을 사용한 전지들의 용량 특성을 나타낸 그래프이다.
도 5은 본 발명의 실시예 1, 비교예 1, 비교예 2에 따른 음극을 사용한 전지들의 저항 특성을 나타낸 그래프이다.
도 6은 본 발명의 비교예 1, 비교예 3, 비교예 4에 따른 음극을 사용한 전지들의 저항 특성을 나타낸 그래프이다.
첨가제 함량(음극 활물질 입자 100중량부 대비 중량부) | 첨가제의 평균 입경(D50) (㎛) | |
실시예 1 | 2 | 1 |
비교예 1 | 0 | - |
비교예 2 | 1 | 1 |
비교예 3 | 5 | 1 |
비교예 4 | 5 | 0.4 |
종결 전류(mA) | C-rate(C) | 용량(mAh) | |
실시예 1 | 80.2 | 0.55C | 143.0 |
비교예 1 | 72.7 | 0.49 | 148.2 |
비교예 2 | 72.6 | 0.49 | 147.3 |
비교예 3 | 82.9 | 0.67 | 123.3 |
비교예 4 | 77.2 | 0.63 | 122.4 |
Claims (10)
- 음극 활물질 입자 및 첨가제를 포함하는 음극 활물질층을 포함하고,
상기 음극 활물질 입자는 실리콘계 활물질 입자 및 흑연계 활물질 입자 중 적어도 어느 하나를 포함하며,
상기 첨가제는 상기 음극 활물질 입자 100중량부에 대해 1.8중량부 내지 3.2중량부로 포함되며,
상기 첨가제는 LATP, LAGP, LLTO 및 LLZO로 이루어진 군에서 선택되는 적어도 어느 하나를 포함하고,
상기 첨가제의 평균 입경(D50)은 0.8㎛ 내지 2㎛인, 음극.
- 청구항 1에 있어서,
상기 첨가제는 상기 음극 활물질 입자 100중량부에 대해 2중량부 내지 2.5중량부로 포함되는, 음극.
- 청구항 1에 있어서,
상기 첨가제는 LATP인, 음극.
- 삭제
- 삭제
- 삭제
- 청구항 1에 있어서,
상기 음극 활물질 입자는 인조흑연 및 SiOx(0<x≤2)를 포함하는, 음극.
- 청구항 1에 있어서,
상기 음극 활물질 입자는 상기 음극 활물질층 내 80중량% 내지 97중량%로 포함되는, 음극.
- 청구항 1에 있어서,
상기 음극 활물질층은 도전재를 더 포함하는, 음극.
- 청구항 1의 음극;
양극;
상기 양극과 상기 음극 사이에 개재된 분리막; 및
전해액을 포함하는 이차 전지.
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