JP6104536B2 - 非水電解質二次電池及びその製造方法 - Google Patents
非水電解質二次電池及びその製造方法 Download PDFInfo
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- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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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
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Description
(1)正極の作製
以下の手順で、組成式がLiNi0.35Co0.35Mn0.30O2である正極活物質を作製した。
負極活物質としての炭素材料と、結着剤としてのスチレンブタジエンゴムと、増粘剤としてのカルボキシメチルセルロースとを、質量比98:1:1で混合し、さらに水と混合して負極活物質スラリーを調製した。
上記正極と負極とポリエチレン製微多孔膜からなるセパレータとを、同じ極性の芯体露出部同士が複数枚直接重なり、正極及び負極の芯体露出部同士が巻回方向に対し互いに逆向きに突出し、かつ正極及び負極の活物質層間にはセパレータが介在するように3つの部材を位置あわせし重ね合わせて巻回し、絶縁性の巻き止めテープを設け、その後プレスして扁平状の電極体を完成させた。
まず、実施例1で得られた非水電解質二次電池について、低温下における充放電サイクルを以下のようにして行った。
非水電解質二次電池の容量を5.8Ah、正負極対向容量比を1.05としたこと以外は、実施例1と同様にして、非水電解質二次電池を作製し、低温下における充放電サイクル後の負極でのLiの析出の有無を確認した。結果を表1に示す。
LiPO2F2を添加せず、非水電解質二次電池の容量を5.0Ahとしたこと以外は、実施例1と同様にして、非水電解質二次電池を作製し、低温下における充放電サイクル後の負極でのLiの析出の有無を確認した。結果を表1に示す。
LiPO2F2を添加せず、非水電解質二次電池の容量を4.5Ah、正負極対向容量比を1.45としたこと以外は、実施例1と同様にして、非水電解質二次電池を作製し、低温下における充放電サイクル後の負極でのLiの析出の有無を確認した。結果を表1に示す。
10…容器
10a,10b…端面
11…容器本体
12…封口板
13…正極端子
14…負極端子
15…正極配線材
16…負極配線材
20…電極体
21…正極
21a…正極集電体
21b…正極活物質層
22…負極
22a…負極集電体
22b…負極活物質層
23…セパレータ
Claims (6)
- 正極と、前記正極と対向している負極と、前記正極と前記負極との間に配されたセパレータとが巻回された電極体と、
非水電解質と、を備え、
電池容量が4Ah以上であり、
中心を含む断面における前記正極の積層数が50以上である、非水電解質二次電池であって、
正負極対向容量比が1.1〜1.29であり、
前記正負極対向容量比は、前記正極と前記負極の対向する部分での前記正極に対する前記負極の容量比であり、
前記非水電解質がジフルオロリン酸リチウムを含む、非水電解質二次電池。 - 前記非水電解質が、リチウムビス(オキサレート)ボレート(LiBOB)をさらに含む、請求項1に記載の非水電解質二次電池。
- 前記非水電解質中におけるジフルオロリン酸リチウムの含有量が、0.01mol/L以上である、請求項1または2に記載の非水電解質二次電池。
- 正極と、前記正極と対向している負極と、前記正極と前記負極との間に配されたセパレータとが巻回された電極体と、
非水電解質と、
前記電極体と前記非水電解質を収納する容器と、
を備え、
電池容量が4Ah以上であり、
中心を含む断面における前記正極の積層数が50以上であり、
正負極対向容量比が1.1〜1.29であり、
前記正負極対向容量比は、前記正極と前記負極の対向する部分での前記正極に対する前記負極の容量比である非水電解質二次電池の製造方法であって、
ジフルオロリン酸リチウムを含む前記非水電解質を前記容器に注液する注液工程を有する非水電解質二次電池の製造方法。 - 前記注液工程において、
前記非水電解質が、リチウムビス(オキサレート)ボレート(LiBOB)を含む、請求項4に記載の非水電解質二次電池の製造方法。 - 前記注液工程において、
前記非水電解質中におけるジフルオロリン酸リチウムの含有量が、0.01mol/L〜0.1mol/Lである請求項4または5に記載の非水電解質二次電池の製造方法。
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JP2012176787A JP6104536B2 (ja) | 2012-08-09 | 2012-08-09 | 非水電解質二次電池及びその製造方法 |
US13/962,028 US20140045018A1 (en) | 2012-08-09 | 2013-08-08 | Nonaqueous electrolyte secondary battery |
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JP2012176787A JP6104536B2 (ja) | 2012-08-09 | 2012-08-09 | 非水電解質二次電池及びその製造方法 |
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JP2014035892A JP2014035892A (ja) | 2014-02-24 |
JP6104536B2 true JP6104536B2 (ja) | 2017-03-29 |
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EP3171445B1 (en) * | 2014-07-15 | 2020-09-02 | UBE Industries, Ltd. | Non-aqueous electrolyte solution and electricity storage device in which same is used |
WO2016017809A1 (ja) * | 2014-08-01 | 2016-02-04 | 宇部興産株式会社 | 非水電解液およびそれを用いた蓄電デバイス |
JP2016146341A (ja) * | 2015-02-02 | 2016-08-12 | 三菱化学株式会社 | 非水系電解液及び非水系電解液二次電池 |
JP2018163855A (ja) * | 2017-03-27 | 2018-10-18 | 三洋電機株式会社 | 非水電解質二次電池 |
JP2020102309A (ja) * | 2018-12-20 | 2020-07-02 | 古河電池株式会社 | リチウムイオン二次電池 |
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JP4530822B2 (ja) * | 2004-11-30 | 2010-08-25 | 三洋電機株式会社 | 非水電解質二次電池及びその充電方法 |
US7255965B2 (en) * | 2005-04-25 | 2007-08-14 | Ferro Corporation | Non-aqueous electrolytic solution |
JP5636622B2 (ja) * | 2005-11-29 | 2014-12-10 | 三菱化学株式会社 | リチウム二次電池用非水系電解液及びそれを用いたリチウム二次電池 |
WO2010064637A1 (ja) * | 2008-12-02 | 2010-06-10 | ステラケミファ株式会社 | ジフルオロリン酸塩の製造方法、非水系電解液及び非水系電解液二次電池 |
JP5278442B2 (ja) * | 2009-01-06 | 2013-09-04 | 株式会社村田製作所 | 非水電解液二次電池 |
JP5464117B2 (ja) * | 2010-10-08 | 2014-04-09 | トヨタ自動車株式会社 | リチウムイオン二次電池の製造方法 |
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JP2014035892A (ja) | 2014-02-24 |
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