JP4465264B2 - 寿命特性と安全性に優れたリチウム金属複合酸化物およびその製造方法 - Google Patents
寿命特性と安全性に優れたリチウム金属複合酸化物およびその製造方法 Download PDFInfo
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- JP4465264B2 JP4465264B2 JP2004500352A JP2004500352A JP4465264B2 JP 4465264 B2 JP4465264 B2 JP 4465264B2 JP 2004500352 A JP2004500352 A JP 2004500352A JP 2004500352 A JP2004500352 A JP 2004500352A JP 4465264 B2 JP4465264 B2 JP 4465264B2
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- 229910052744 lithium Inorganic materials 0.000 title claims description 42
- 239000002905 metal composite material Substances 0.000 title claims description 30
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 239000007771 core particle Substances 0.000 claims description 36
- 239000011247 coating layer Substances 0.000 claims description 32
- CKFRRHLHAJZIIN-UHFFFAOYSA-N cobalt lithium Chemical compound [Li].[Co] CKFRRHLHAJZIIN-UHFFFAOYSA-N 0.000 claims description 30
- 239000002131 composite material Substances 0.000 claims description 30
- 239000002994 raw material Substances 0.000 claims description 23
- 239000007774 positive electrode material Substances 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 17
- 238000000576 coating method Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 12
- 229910012851 LiCoO 2 Inorganic materials 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 9
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 8
- 229910001416 lithium ion Inorganic materials 0.000 claims description 8
- 239000002904 solvent Substances 0.000 claims description 8
- 239000000725 suspension Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims description 2
- 150000004679 hydroxides Chemical class 0.000 claims description 2
- 239000003960 organic solvent Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims 1
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 claims 1
- 229910002651 NO3 Inorganic materials 0.000 claims 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims 1
- 239000006182 cathode active material Substances 0.000 claims 1
- 150000004696 coordination complex Chemical class 0.000 claims 1
- -1 hydrate Chemical compound 0.000 claims 1
- 230000000717 retained effect Effects 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 6
- 238000007599 discharging Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 229910013290 LiNiO 2 Inorganic materials 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 2
- 229910015643 LiMn 2 O 4 Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 235000012054 meals Nutrition 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910020599 Co 3 O 4 Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910013937 LiCo0.95Al0.05O2 Inorganic materials 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 150000001242 acetic acid derivatives Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 150000001860 citric acid derivatives Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 150000003840 hydrochlorides Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 description 1
- 229910021450 lithium metal oxide Inorganic materials 0.000 description 1
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000002345 surface coating layer Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 239000003021 water soluble solvent Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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- H01M10/052—Li-accumulators
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- C01G51/40—Complex oxides containing cobalt and at least one other metal element
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Description
1)リチウム金属複合酸化物を提供するステップと、
2)熱処理後に非晶質リチウムコバルト複合酸化物の被覆層を形成する原料の混合物を提供するステップと、
3)上記ステップ2)の混合物をステップ1)のリチウム金属複合酸化物に被覆するステップと、
4)上記ステップ3)の被覆されたリチウム金属複合酸化物を焼成するステップと、
を含むリチウム金属複合酸化物の製造方法に係る。
[実施例]
表2によると、表面を被覆した場合、より優れた高率放電特性を見せていることが分かる。
Claims (10)
- リチウム金属複合酸化物のコア粒子に非晶質リチウムコバルト複合酸化物が被覆されたリチウム金属複合酸化物を含む正極活物質であって、前記コア粒子は、リチウムコバルト系複合酸化物であり、前記被覆層は、化学式Li1+xCo1−x−yAyO2のリチウムコバルト複合酸化物を含む非晶質酸化物であり、ここで、0≦x≦0.1、0≦y≦0.5であり、AはAlであることを特徴とする被覆されたリチウム金属複合酸化物を含む正極活物質。
- 前記コア粒子は、LiCoO2 又は少なくとも1種の金属がドープされたLiCoO 2 であることを特徴とする請求項1に記載の正極活物質。
- 被覆層の量は、被覆層が熱処理後、酸化されるという仮定下で、モル比で0.1〜10モル%であることを特徴とする請求項1に記載の正極活物質。
- 1)コア粒子であるリチウム金属複合酸化物を提供するステップと、
2)非晶質リチウムコバルト複合酸化物を形成する被覆層原料の混合物を提供するステップと、
3)前記ステップ2)の混合物をステップ1)のリチウム金属複合酸化物に被覆するステップと、
4)前記ステップ3)の被覆されたリチウム金属複合酸化物を焼成するステップと;
を含むことを特徴とする請求項1に記載のリチウム金属複合酸化物を含む正極活物質の製造方法。 - ステップ1)で前記コア粒子は、LiCoO2 又は少なくとも1種の金属がドープされたLiCoO 2 であることを特徴とする請求項4に記載の方法。
- ステップ2)における被覆層をなす非晶質リチウムコバルト複合酸化物の原料は、前記被覆層をなす元素の炭酸塩、窒酸塩、水酸塩、硫酸塩、酢酸塩、クエン酸塩、塩化物、水酸化物および酸化物より選ばれた1種以上であり、溶媒は水又は有機溶媒であることを特徴とする請求項4に記載の方法。
- ステップ2)において、被覆層の量は、被覆層が熱処理後酸化されるという仮定下で、モル比で0.1〜10モル%であることを特徴とする請求項4に記載の方法。
- ステップ3)の被覆は、コア粒子を空気中に流動化させた後、被覆層を形成する混合物溶液をコア粒子に噴霧乾燥させ被覆する方法、又は、コア粒子と被覆層原料との混合物で構成された懸濁液を形成した後、攪拌と同時に高温の熱風を加えて被覆する方法、若しくは、コア粒子を被覆層原料の混合物の懸濁液に一定の時間滞留させた後、乾燥して被覆する方法により行われることを特徴とする請求項4に記載の方法。
- ステップ4)において、コア粒子であるリチウム金属複合酸化物粒子の表面に、非晶質リチウムコバルト複合酸化物を形成するための熱処理は、200〜800℃の温度で、0.1〜10時間行われることを特徴とする請求項4に記載の方法。
- リチウム又はリチウムイオン2次電池として使用されることを特徴とする請求項1に記載の正極活物質。
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| KR1020020022167A KR20030083476A (ko) | 2002-04-23 | 2002-04-23 | 수명 특성과 안전성이 우수한 리튬 금속 복합 산화물 및이의 제조 방법 |
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| US7138209B2 (en) * | 2000-10-09 | 2006-11-21 | Samsung Sdi Co., Ltd. | Positive active material for rechargeable lithium battery and method of preparing same |
| JP2002175808A (ja) * | 2000-12-08 | 2002-06-21 | Toyota Central Res & Dev Lab Inc | リチウム二次電池正極活物質用リチウム遷移金属複合酸化物およびその製造方法 |
| KR100674015B1 (ko) * | 2001-02-12 | 2007-01-24 | 주식회사 엘지화학 | 수명특성이 우수한 리튬 2 차 전지의 양극 활물질, 이의 제조 방법, 및 이를 포함하는 리튬 2차 전지 |
| KR100404891B1 (ko) * | 2001-03-13 | 2003-11-10 | 주식회사 엘지화학 | 리튬 2 차 전지의 양극 활물질 및 그 제조 방법 |
-
2002
- 2002-04-23 KR KR1020020022167A patent/KR20030083476A/ko not_active Ceased
-
2003
- 2003-04-22 US US10/487,861 patent/US7235193B2/en not_active Expired - Lifetime
- 2003-04-22 AU AU2003222488A patent/AU2003222488A1/en not_active Abandoned
- 2003-04-22 EP EP03717762A patent/EP1497876B1/en not_active Expired - Lifetime
- 2003-04-22 CN CNA038011409A patent/CN1565063A/zh active Pending
- 2003-04-22 WO PCT/KR2003/000815 patent/WO2003092099A1/en not_active Ceased
- 2003-04-22 JP JP2004500352A patent/JP4465264B2/ja not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11038159B2 (en) | 2017-01-31 | 2021-06-15 | Lg Chem, Ltd. | Positive electrode active material for lithium secondary battery including lithium cobalt oxide having core-shell structure, method for producing the same, and positive electrode and secondary battery including the positive electrode active material |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1497876A1 (en) | 2005-01-19 |
| CN1565063A (zh) | 2005-01-12 |
| JP2005524204A (ja) | 2005-08-11 |
| EP1497876A4 (en) | 2010-10-27 |
| KR20030083476A (ko) | 2003-10-30 |
| EP1497876B1 (en) | 2012-05-23 |
| US7235193B2 (en) | 2007-06-26 |
| WO2003092099A1 (en) | 2003-11-06 |
| US20040200998A1 (en) | 2004-10-14 |
| AU2003222488A1 (en) | 2003-11-10 |
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