JP2012243463A - 非水電解質二次電池 - Google Patents
非水電解質二次電池 Download PDFInfo
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- 239000002245 particle Substances 0.000 claims abstract description 61
- 239000000203 mixture Substances 0.000 claims abstract description 53
- 239000006182 cathode active material Substances 0.000 claims abstract description 4
- 239000007774 positive electrode material Substances 0.000 claims description 125
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 29
- 239000012752 auxiliary agent Substances 0.000 claims description 24
- 229910002804 graphite Inorganic materials 0.000 claims description 18
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- 239000006229 carbon black Substances 0.000 claims description 14
- 239000002131 composite material Substances 0.000 claims description 10
- 229910052744 lithium Inorganic materials 0.000 claims description 9
- 229910052759 nickel Inorganic materials 0.000 claims description 9
- 229910052748 manganese Inorganic materials 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 5
- 239000008151 electrolyte solution Substances 0.000 claims description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 28
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 12
- 230000008859 change Effects 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 239000011572 manganese Substances 0.000 description 9
- 239000011230 binding agent Substances 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 8
- 230000007423 decrease Effects 0.000 description 8
- 239000011149 active material Substances 0.000 description 7
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 6
- 239000006230 acetylene black Substances 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 229910001416 lithium ion Inorganic materials 0.000 description 6
- 238000004804 winding Methods 0.000 description 6
- 241000156302 Porcine hemagglutinating encephalomyelitis virus Species 0.000 description 5
- 229910017052 cobalt Inorganic materials 0.000 description 5
- 239000010941 cobalt Substances 0.000 description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000011888 foil Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 239000002033 PVDF binder Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000007773 negative electrode material Substances 0.000 description 3
- 230000009257 reactivity Effects 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- SOXUFMZTHZXOGC-UHFFFAOYSA-N [Li].[Mn].[Co].[Ni] Chemical compound [Li].[Mn].[Co].[Ni] SOXUFMZTHZXOGC-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000006232 furnace black Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910003002 lithium salt Inorganic materials 0.000 description 2
- 159000000002 lithium salts Chemical class 0.000 description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
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- 239000000243 solution Substances 0.000 description 2
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- 229910013063 LiBF 4 Inorganic materials 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- 229910001290 LiPF6 Inorganic materials 0.000 description 1
- 229910016669 Ni0.50Mn0.30Co0.20 Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
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- 150000001450 anions Chemical class 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
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- 238000010792 warming Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Battery Electrode And Active Subsutance (AREA)
Abstract
【解決手段】正極合剤が、Ni含有量が多くかつ平均粒子径の大きい第1の正極活物質と、Ni含有量が少なくかつ平均粒子径の小さい第2の正極活物質と、平均粒子径が互いに異なる第1の導電助剤と第2の導電助剤を有している非水電解質二次電池。
【選択図】図8
Description
2 負極
31 第1の正極活物質(平均粒子径:8〜15μm 比表面積:0.4〜0.6m2/g)
32 第2の正極活物質(平均粒子径:2〜5μm 比表面積:0.8〜1.2m2/g)
33 黒鉛(平均粒子径:4〜6μm)
34 カーボンブラック(平均粒子径:0.5〜2.0μm)
35 正極混合物(平均粒子径:5〜15μm 比表面積:0.6〜1.0m2/g)
D1 非水電解質二次電池
Claims (7)
- リチウムを吸蔵放出可能な正極と、リチウムを吸蔵放出可能な負極とが、電解液を介して形成される非水電解質二次電池であって、
前記正極は、正極活物質と導電助剤を含む正極合剤と、該正極合剤が塗工される正極集電体を有し、
前記正極活物質は、Li、Ni、Mn及びCoを含有する複合酸化物である第1の正極活物質と第2の正極活物質を有し、第1の正極活物質のNi含有量が第2の正極活物質のNi含有量よりも多く、かつ、第1の正極活物質の平均粒子径が第2の正極活物質の平均粒子径よりも大きく、
前記導電助剤は、平均粒子径が互いに異なる第1の導電助剤と第2の導電助剤を有することを特徴とする非水電解質二次電池。 - 前記正極活物質は、
前記第1の正極活物質が化学式LiαNixMn(1-x-y)CoyO2(1.05≦α≦1.15、0.5≦x≦0.6、0.2≦y≦0.3)で表される複合酸化物であって、平均粒子径が8μm以上15μm以下であり、
前記第2の正極活物質が化学式LiβNi(1-s-t)MnsCotO2(但し、1.05≦β≦1.10、0.2≦s≦0.4、s+t=1.0)で表される複合酸化物であって、平均粒子径が2μm以上5μm以下であり、
前記第1の正極活物質と前記第2の正極活物質の重量比が6:4から8:2の範囲であることを特徴とする請求項1に記載の非水電解質二次電池。 - 前記正極活物質は、
前記第1の正極活物質の比表面積が、0.4m2/g以上0.6m2/g以下であり、
前記第2の正極活物質の比表面積が、0.8m2/g以上1.2m2/g以下であることを特徴とする請求項1または2に記載の非水電解質二次電池。 - 前記導電助剤は、
前記第1の導電助剤が平均粒子径4μm以上6μm以下の黒鉛であり、
前記第2の導電助剤が平均粒子径0.5μm以上2μm以下のカーボンブラックであることを特徴とする請求項1から請求項3のいずれか一項に記載の非水電解質二次電池。 - 前記カーボンブラックは、ケッチェンブラックを含むことを特徴とする請求項4に記載の非水電解質二次電池。
- 前記導電助剤の前記正極活物質に対する体積率が20%以上40%以下であることを特徴とする請求項1から請求項5のいずれか一項に記載の非水電解質二次電池。
- 前記正極合剤の電極密度が2.82 g/cm3以上2.88g/cm3以下であることを特徴とする請求項1から請求項6のいずれか一項に記載の非水電解質二次電池。
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Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2014098037A1 (ja) * | 2012-12-18 | 2014-06-26 | オートモーティブエナジーサプライ株式会社 | 非水電解質電池用混合電極およびその製造方法 |
WO2014156011A1 (ja) * | 2013-03-27 | 2014-10-02 | 三洋電機株式会社 | 非水電解質二次電池 |
JP2015026594A (ja) * | 2013-06-20 | 2015-02-05 | 株式会社Gsユアサ | リチウム二次電池用混合活物質、リチウム二次電池用電極、及びリチウム二次電池 |
CN105723557A (zh) * | 2013-12-03 | 2016-06-29 | 株式会社Lg化学 | 包括具有不同输出和容量特性的电极的混合型二次电池 |
JP2016526755A (ja) * | 2013-06-12 | 2016-09-05 | ヘレーウス クヴァルツグラース ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフトHeraeus Quarzglas GmbH & Co. KG | 二次電池用のリチウムイオンセル |
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US9793570B2 (en) | 2015-12-04 | 2017-10-17 | Microsoft Technology Licensing, Llc | Shared electrode battery |
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JP2018198132A (ja) * | 2017-05-23 | 2018-12-13 | 本田技研工業株式会社 | リチウムイオン二次電池用正極及びそれを用いるリチウムイオン二次電池 |
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WO2019053861A1 (ja) | 2017-09-14 | 2019-03-21 | 株式会社 東芝 | 電極及び非水電解質電池 |
WO2019103463A1 (ko) * | 2017-11-21 | 2019-05-31 | 주식회사 엘지화학 | 리튬이차전지용 양극재, 이를 포함하는 양극 및 리튬이차전지 |
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WO2023053626A1 (ja) * | 2021-09-28 | 2023-04-06 | 三洋電機株式会社 | 非水電解質二次電池 |
WO2023131987A1 (ja) | 2022-01-04 | 2023-07-13 | 株式会社 東芝 | 電極、電池、及び電池パック |
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US10084188B2 (en) | 2012-07-12 | 2018-09-25 | Sumitomo Metal Mining Co., Ltd. | Positive electrode active substance for nonaqueous electrolyte secondary cell, method for producing same, and nonaqueous electrolyte secondary cell using positive electrode active substance |
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WO2014098037A1 (ja) * | 2012-12-18 | 2014-06-26 | オートモーティブエナジーサプライ株式会社 | 非水電解質電池用混合電極およびその製造方法 |
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CN105723557A (zh) * | 2013-12-03 | 2016-06-29 | 株式会社Lg化学 | 包括具有不同输出和容量特性的电极的混合型二次电池 |
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