KR20170086122A - 리튬 이온 이차 전지의 음극용 분말, 및 그 제조 방법 - Google Patents
리튬 이온 이차 전지의 음극용 분말, 및 그 제조 방법 Download PDFInfo
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- KR20170086122A KR20170086122A KR1020177017982A KR20177017982A KR20170086122A KR 20170086122 A KR20170086122 A KR 20170086122A KR 1020177017982 A KR1020177017982 A KR 1020177017982A KR 20177017982 A KR20177017982 A KR 20177017982A KR 20170086122 A KR20170086122 A KR 20170086122A
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- 239000000843 powder Substances 0.000 title claims abstract description 107
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 title claims description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 60
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 58
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910004283 SiO 4 Inorganic materials 0.000 claims abstract description 24
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 11
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 8
- 238000002441 X-ray diffraction Methods 0.000 claims abstract description 5
- 230000005260 alpha ray Effects 0.000 claims abstract description 5
- 238000010304 firing Methods 0.000 claims description 44
- 150000002642 lithium compounds Chemical class 0.000 claims description 33
- 238000002156 mixing Methods 0.000 claims description 28
- 239000011812 mixed powder Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 17
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 8
- 238000000354 decomposition reaction Methods 0.000 claims description 8
- 229910052744 lithium Inorganic materials 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 1
- 229910021419 crystalline silicon Inorganic materials 0.000 abstract description 26
- 230000014759 maintenance of location Effects 0.000 abstract description 12
- 230000015572 biosynthetic process Effects 0.000 description 9
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 description 8
- 229910052912 lithium silicate Inorganic materials 0.000 description 8
- 239000002002 slurry Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 229910000103 lithium hydride Inorganic materials 0.000 description 6
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 239000007773 negative electrode material Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000003575 carbonaceous material Substances 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004455 differential thermal analysis Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 238000009616 inductively coupled plasma Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 description 2
- -1 lithium silicates Chemical class 0.000 description 2
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 1
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 1
- 229910015643 LiMn 2 O 4 Inorganic materials 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- MKYBYDHXWVHEJW-UHFFFAOYSA-N N-[1-oxo-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propan-2-yl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(C(C)NC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 MKYBYDHXWVHEJW-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- JJVGROTXXZVGGN-UHFFFAOYSA-H [Li+].[Li+].[Li+].[Li+].[Li+].[Li+].[F-].[F-].[F-].[F-].[F-].[F-] Chemical compound [Li+].[Li+].[Li+].[Li+].[Li+].[Li+].[F-].[F-].[F-].[F-].[F-].[F-] JJVGROTXXZVGGN-UHFFFAOYSA-H 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009831 deintercalation Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000004993 emission spectroscopy Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000005551 mechanical alloying Methods 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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Abstract
Description
도 2는, 본 발명의 일실시 형태에 관련된 제조 방법에서의 예비 소성 공정 및 주소성 공정의 승강온 패턴을 나타내는 도면이다.
Claims (8)
- 리튬 이온 이차 전지의 음극용 분말로서,
Li를 함유하는 규소 산화물 분말을 포함하고,
상기 분말 전체의 평균 조성으로서, Li와 Si와 O의 몰비를 y:1:x로 하면, 0.5<x<1.5, 또한, 0.1<y/x<0.8의 관계를 만족하고,
상기 음극용 분말의 체적 메디안 지름이, 0.5~30μm의 범위 내에 있으며,
상기 분말에 대해서 CuKα선을 이용한 X선 회절 측정을 행했을 때, 회절각 2θ가 18.0~20.0°의 범위에 나타나는 Li2SiO3에 기인하는 피크의 높이를 P1로 하고, 회절각 2θ가 27.4~29.4°의 범위에 나타날 수 있는 결정성 Si에 기인하는 피크의 높이를 P2로 하고, 회절각 2θ가 21.5~22.5°의 범위에 나타날 수 있는 Li4SiO4에 기인하는 피크의 높이를 P3으로 하면, P2/P1≤1.0의 관계를 만족함과 함께, P3/P1≤1.0의 관계를 만족하는, 분말. - 청구항 1에 있어서,
P2/P1≤0.5를 만족하는, 분말. - 청구항 1에 있어서,
P2/P1≤0.1을 만족하는, 분말. - 청구항 1 내지 청구항 3 중 어느 한 항에 있어서,
상기 분말을 구성하는 입자의 표면의 적어도 일부에, 도전성 탄소 피막이 형성되어 있는, 분말. - 청구항 1 내지 청구항 4 중 어느 한 항에 있어서,
상기 분말의 체적 메디안 지름이 0.5~15μm의 범위 내에 있으며,
상기 분말의 BET 비표면적이 0.5~15m2/g의 범위 내에 있는, 분말. - 리튬 이온 이차 전지의 음극용 분말의 제조 방법으로서,
Si와 O의 몰비가 1:x1(0.5<x1<1.5)인 규소 산화물 분말과 리튬 화합물 분말을 혼합하여, 제1 혼합 분말을 얻는 제1 혼합 공정과,
상기 제1 혼합 분말을, 상기 리튬 화합물 분말의 분해 온도보다 30~200℃ 낮은 온도인 예비 소성 온도에서 소성하는 제1 예비 소성 공정과,
상기 제1 예비 소성 공정 후, 상기 제1 혼합 분말을, 450~700℃의 온도 범위 내의 주소성 온도에서 소성하는 제1 주소성 공정을 포함하는, 제조 방법. - 청구항 6에 있어서,
상기 제1 주소성 공정 후, 상기 제1 혼합 분말에 리튬 화합물 분말을 추가하고 혼합하여, 제2 혼합 분말을 얻는 제2 혼합 공정과,
상기 제2 혼합 분말을, 상기 예비 소성 온도에서 소성하는 제2 예비 소성 공정과,
상기 제2 예비 소성 공정 후, 상기 제2 혼합 분말을, 상기 주소성 온도에서 소성하는 제2 주소성 공정을 더 포함하는, 제조 방법. - 청구항 7에 있어서,
상기 제1 혼합 공정에서 혼합하는 상기 규소 산화물 분말의 O와 상기 리튬 화합물 분말의 Li의 몰비를 x1:y1로 하고, 상기 제2 혼합 공정에서 혼합하는 상기 제1 혼합 분말의 O와 상기 리튬 화합물 분말의 Li의 몰비를 x2:y2로 하면, 0.5≥y1/x1>y2/x2의 관계를 만족하는, 제조 방법.
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| JP6862090B2 (ja) * | 2016-02-15 | 2021-04-21 | 信越化学工業株式会社 | 負極活物質、混合負極活物質材料、非水電解質二次電池用負極、リチウムイオン二次電池、負極活物質の製造方法、及びリチウムイオン二次電池の製造方法 |
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| US11527745B2 (en) * | 2019-09-03 | 2022-12-13 | GM Global Technology Operations LLC | Methods of pre-lithiating electrodes |
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| EP4131493A4 (en) * | 2020-03-25 | 2024-09-04 | Ningde Amperex Technology Limited | Negative electrode material, negative electrode plate, electrochemical device and electronic device |
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| KR102804108B1 (ko) | 2021-02-24 | 2025-05-13 | 고려대학교 산학협력단 | 전고체 전지용 복합리튬분말 음극 및 이의 제조 방법 및 이를 포함하는 전고체 전지 |
| JP7828729B2 (ja) * | 2021-06-08 | 2026-03-12 | 信越化学工業株式会社 | 負極活物質、負極及びリチウムイオン二次電池 |
| WO2024054035A1 (ko) * | 2022-09-07 | 2024-03-14 | 주식회사 엘지에너지솔루션 | 음극 활물질, 이를 포함하는 음극, 이를 포함하는 이차전지 및 음극 활물질의 제조방법 |
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| Publication number | Publication date |
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| JP6280242B2 (ja) | 2018-02-14 |
| CN107004847A (zh) | 2017-08-01 |
| EP3236521A1 (en) | 2017-10-25 |
| CN107004847B (zh) | 2019-10-29 |
| JPWO2016098306A1 (ja) | 2017-08-31 |
| KR101886592B1 (ko) | 2018-08-07 |
| US10236531B2 (en) | 2019-03-19 |
| EP3236521A4 (en) | 2018-05-30 |
| WO2016098306A1 (ja) | 2016-06-23 |
| US20180309160A1 (en) | 2018-10-25 |
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