KR102359583B1 - 고체전해질 및 이를 포함하는 전고체 전지의 제조방법 - Google Patents
고체전해질 및 이를 포함하는 전고체 전지의 제조방법 Download PDFInfo
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- KR102359583B1 KR102359583B1 KR1020170057492A KR20170057492A KR102359583B1 KR 102359583 B1 KR102359583 B1 KR 102359583B1 KR 1020170057492 A KR1020170057492 A KR 1020170057492A KR 20170057492 A KR20170057492 A KR 20170057492A KR 102359583 B1 KR102359583 B1 KR 102359583B1
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- 239000007784 solid electrolyte Substances 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000007787 solid Substances 0.000 title description 2
- 239000000843 powder Substances 0.000 claims abstract description 76
- 239000002131 composite material Substances 0.000 claims abstract description 55
- 239000007774 positive electrode material Substances 0.000 claims abstract description 52
- 239000002904 solvent Substances 0.000 claims abstract description 39
- 239000004020 conductor Substances 0.000 claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 claims abstract description 26
- 238000003801 milling Methods 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims description 64
- 239000003792 electrolyte Substances 0.000 claims description 34
- 238000001035 drying Methods 0.000 claims description 26
- 239000002002 slurry Substances 0.000 claims description 25
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 23
- 239000006182 cathode active material Substances 0.000 claims description 14
- FKRCODPIKNYEAC-UHFFFAOYSA-N ethyl propionate Chemical compound CCOC(=O)CC FKRCODPIKNYEAC-UHFFFAOYSA-N 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 10
- 238000007731 hot pressing Methods 0.000 claims description 9
- 229910052744 lithium Inorganic materials 0.000 claims description 9
- 229910021450 lithium metal oxide Inorganic materials 0.000 claims description 9
- VKCLPVFDVVKEKU-UHFFFAOYSA-N S=[P] Chemical compound S=[P] VKCLPVFDVVKEKU-UHFFFAOYSA-N 0.000 claims description 8
- GLNWILHOFOBOFD-UHFFFAOYSA-N lithium sulfide Chemical compound [Li+].[Li+].[S-2] GLNWILHOFOBOFD-UHFFFAOYSA-N 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- KHDSWONFYIAAPE-UHFFFAOYSA-N silicon sulfide Chemical compound S=[Si]=S KHDSWONFYIAAPE-UHFFFAOYSA-N 0.000 claims description 7
- ZVTQDOIPKNCMAR-UHFFFAOYSA-N sulfanylidene(sulfanylideneboranylsulfanyl)borane Chemical compound S=BSB=S ZVTQDOIPKNCMAR-UHFFFAOYSA-N 0.000 claims description 7
- VDNSGQQAZRMTCI-UHFFFAOYSA-N sulfanylidenegermanium Chemical compound [Ge]=S VDNSGQQAZRMTCI-UHFFFAOYSA-N 0.000 claims description 7
- 239000012298 atmosphere Substances 0.000 claims description 6
- UHOPWFKONJYLCF-UHFFFAOYSA-N 2-(2-sulfanylethyl)isoindole-1,3-dione Chemical compound C1=CC=C2C(=O)N(CCS)C(=O)C2=C1 UHOPWFKONJYLCF-UHFFFAOYSA-N 0.000 claims description 5
- RJUFJBKOKNCXHH-UHFFFAOYSA-N Methyl propionate Chemical compound CCC(=O)OC RJUFJBKOKNCXHH-UHFFFAOYSA-N 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 5
- 239000011261 inert gas Substances 0.000 claims description 5
- 229940017219 methyl propionate Drugs 0.000 claims description 5
- 229910019142 PO4 Inorganic materials 0.000 claims description 4
- 239000010450 olivine Substances 0.000 claims description 4
- 229910052609 olivine Inorganic materials 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 4
- 239000010452 phosphate Substances 0.000 claims description 4
- 229910052596 spinel Inorganic materials 0.000 claims description 4
- 239000011029 spinel Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 9
- 239000010410 layer Substances 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 16
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 8
- 229910001416 lithium ion Inorganic materials 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000003759 ester based solvent Substances 0.000 description 5
- 238000010884 ion-beam technique Methods 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 239000002798 polar solvent Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- -1 SiS 2 Chemical class 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000004210 ether based solvent Substances 0.000 description 3
- 229910052736 halogen Inorganic materials 0.000 description 3
- 150000002367 halogens Chemical class 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 229910052723 transition metal Inorganic materials 0.000 description 3
- 229910018091 Li 2 S Inorganic materials 0.000 description 2
- 229910013716 LiNi Inorganic materials 0.000 description 2
- 229910011328 LiNi0.6Co0.2Mn0.2O2 Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000011149 active material Substances 0.000 description 2
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- 125000003545 alkoxy group Chemical group 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 2
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 238000010299 mechanically pulverizing process Methods 0.000 description 2
- 229910021382 natural graphite Inorganic materials 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
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- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 125000001424 substituent group Chemical group 0.000 description 2
- 229910000314 transition metal oxide Inorganic materials 0.000 description 2
- 238000004627 transmission electron microscopy Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229910005839 GeS 2 Inorganic materials 0.000 description 1
- 229910011458 Li4/3 Ti5/3O4 Inorganic materials 0.000 description 1
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 1
- 229910010707 LiFePO 4 Inorganic materials 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910020346 SiS 2 Inorganic materials 0.000 description 1
- PFYQFCKUASLJLL-UHFFFAOYSA-N [Co].[Ni].[Li] Chemical compound [Co].[Ni].[Li] PFYQFCKUASLJLL-UHFFFAOYSA-N 0.000 description 1
- HFCVPDYCRZVZDF-UHFFFAOYSA-N [Li+].[Co+2].[Ni+2].[O-][Mn]([O-])(=O)=O Chemical compound [Li+].[Co+2].[Ni+2].[O-][Mn]([O-])(=O)=O HFCVPDYCRZVZDF-UHFFFAOYSA-N 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
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- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 150000002366 halogen compounds Chemical class 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229920003049 isoprene rubber Polymers 0.000 description 1
- 239000003273 ketjen black Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 238000005580 one pot reaction Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- 125000000101 thioether group Chemical group 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 150000003623 transition metal compounds Chemical class 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
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- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0561—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of inorganic materials only
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Abstract
Description
도 2는 본 발명의 실시예1의 전고체 전지에 포함된 양극 내의 고체전해질을 투과전자현미경(transmission electron microscopy, TEM)으로 분석한 결과이다.
도 3은 본 발명의 비교예1의 전고체 전지에 포함된 양극의 표면 및 단면을 전자형미경(scanning electron microscpe, SEM)과 접속이온빔장비(focused ion beam, FIB)를 이용하여 분석한 결과이다.
도 4는 본 발명의 비교예2의 전고체 전지에 포함된 양극의 표면 및 단면을 전자형미경(SEM)과 접속이온빔장비(FIB)를 이용하여 분석한 결과이다.
도 5는 본 발명의 실시예1의 전고체 전지에 포함된 양극의 표면 및 단면을 전자형미경(SEM)과 접속이온빔장비(FIB)를 이용하여 분석한 결과이다.
도 6은 본 발명의 실시예2의 전고체 전지에 포함된 양극의 표면 및 단면을 전자형미경(SEM)과 접속이온빔장비(FIB)를 이용하여 분석한 결과이다.
도 7은 본 발명의 비교예1의 전고체 전지에 대한 충방전 특성을 측정한 결과이다.
도 8은 본 발명의 실시예1의 전고체 전지에 대한 충방전 특성을 측정한 결과이다.
10: 양극 집전체
20: 양극
21: 양극활물질 22: 고체전해질 23: 도전재
30: 전해질층
40: 음극
50: 음극 집전체
Claims (20)
- 삭제
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- 삭제
- 삭제
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- 삭제
- 황화리튬을 포함하는 제1원료; 및 황화규소, 황화인, 황화게르마늄, 황화붕소 및 이들의 조합으로 이루어진 군에서 선택되는 제2원료를 용매에 분산시켜 얻은 슬러리에 양극활물질을 첨가하여 혼합하는 단계;
상기 슬러리를 건조하여 고체전해질 및 양극활물질을 포함하는 복합분말을 얻는 단계; 및
상기 복합분말을 핫프레스하여 양극을 형성하는 단계를 포함하는 전고체 전지의 제조방법.
- 제10항에 있어서,
상기 슬러리에 도전재, 바인더 및 이들의 조합으로 이루어진 군에서 선택되는 것을 더 첨가하여 혼합하는 전고체 전지의 제조방법.
- 제10항에 있어서,
상기 방법은 제1원료, 제2원료, 및 양극활물질을 밀링(milling)하는 단계를 포함하지 않는 것을 특징으로 하는 전고체 전지의 제조방법.
- 제10항에 있어서,
상기 양극활물질은 층상 구조의 리튬금속산화물, 스피넬 구조의 리튬금속산화물, 올리빈 구조의 리튬금속인산화물 및 이들의 조합으로 이루어진 군에서 선택되는 전고체 전지의 제조방법.
- 제10항에 있어서,
상기 용매는 메틸 프로피오네이트(methyl propionate), 에틸 프로피오네이트(ethyl propionate), 프로필 프로피오네이트(propyl propionate) 및 이들의 조합으로 이루어진 군에서 선택되는 전고체 전지의 제조방법.
- 제10항에 있어서,
상기 건조는 진공 또는 불활성 가스 분위기에서 100℃ 내지 200℃의 온도로 수행되는 전고체 전지의 제조방법.
- 제11항에 있어서,
상기 복합분말은 양극활물질, 고체전해질 및 도전재를 65~80 : 10~25 : 10~20의 질량비로 포함하는 전고체 전지의 제조방법.
- 제10항에 있어서,
상기 핫프레스는 100℃ 내지 200℃의 온도로 5분 내지 60분 동안 수행되는 전고체 전지의 제조방법.
- 제10항에 있어서,
상기 핫프레스는 1톤 내지 10톤의 압력으로 수행되는 전고체 전지의 제조방법.
- 제10항에 있어서,
상기 복합분말을 몰드 내에 도포하고;
상기 복합분말 상에 전해질 분말을 도포한 뒤;
상기 복합분말과 상기 전해질 분말을 핫프레스하여 양극-전해질층 복합체를 형성하는 전고체 전지의 제조방법.
- 제19항에 있어서,
상기 전해질 분말은 산화물계 고체전해질 분말, 황화물계 고체전해질 분말 및 이들의 조합으로 이루어진 군에서 선택되는 전고체 전지의 제조방법.
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JP2011060649A (ja) | 2009-09-11 | 2011-03-24 | Toyota Motor Corp | 電極活物質層、全固体電池、電極活物質層の製造方法および全固体電池の製造方法 |
JP2016117640A (ja) * | 2014-12-05 | 2016-06-30 | 国立大学法人豊橋技術科学大学 | 固体電解質ガラス及びその製造方法、固体電解質ガラス用前駆体、サスペンジョン、リチウムイオン電池用電極並びにリチウムイオン電池 |
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CN108878981A (zh) | 2018-11-23 |
US20180323469A1 (en) | 2018-11-08 |
CN108878981B (zh) | 2021-11-26 |
KR20180123368A (ko) | 2018-11-16 |
DE102017128713A1 (de) | 2018-11-08 |
US11575149B2 (en) | 2023-02-07 |
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