JP2012501520A - ナノスケールコーティングを備えたカレントコレクタを含む電極及びその製造方法 - Google Patents
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Abstract
【選択図】図2
Description
「活物質」は、リチウムと電気化学的に反応し得る物質を指す。
「カレントコレクタ」は、不活の導電性材料でコーティングされ得る金属性基材を指す。
「ナノスケール」は、最大寸法が約500ナノメートル未満である特徴を指す。
厚さ12.5マイクロメートルのAlホイルをきれいなガラスプレート上に置き、このガラスプレート周囲に孔のあるサンプルホルダー上にこれを保持した。工作用真空をこの孔に接続し、Alホイルを定位置に保持した。HSAG300グラファイト粉末(Timcal/Timrexから入手)をホイル上に散布し、塗装用パッドを取り付けた手持ち式のランダム軌道研磨機(米国特許第6,511,701号に記述)を使用して、8〜30秒間の範囲の異なる持続時間、一定の動きで研磨機を前後に動かすことにより、この粉末をバフがけした。イオン化空気を使用してプレート周辺の過剰な粉末を吹き飛ばし、真空の接続を外してから、ホイルを取り外した。
バイアル瓶中、手で振り混ぜることにより、HSAG300グラファイト粉末(Timcal/Timrexから入手)を、さまざまな重量パーセントでポリフッ化ビニリデン(KYNAR 741、Arkema(Oakville,Canada)から入手)と混合した。結果として得られた粉末混合物を、実施例1の方法を用いたAlホイルのバフがけコーティングに使用した。
Claims (20)
- リチウムポリマー電気化学セル用の電極であって、
金属性基材と、
実質的に均一なナノスケール炭素コーティングと、
電極活物質と、
を含む、カレントコレクタを含み、
前記コーティングが約200ナノメートル未満の最大厚さを有する、電極。 - 前記金属性基材が、アルミニウム、銅、マグネシウム、ニッケル、スズ、及びこれらの合金から選択される、請求項1に記載の電極。
- 前記炭素コーティングがグラファイトを含む、請求項1に記載の電極。
- 前記コーティングが、約50ナノメートル未満の最大厚さを有する、請求項1に記載の電極。
- 結合剤を実質的に含まない、請求項1に記載の電極。
- 結合剤を更に含む、請求項1に記載の電極。
- 前記結合剤がポリフッ化ビニリデンを含む、請求項6に記載の電極。
- 前記コーティングが、約100オーム/平方未満のシート抵抗を有する、請求項1に記載の電極。
- 前記活物質が、LiFePO4、VO2、及びこれらの組み合わせから選択される、請求項1に記載の電極。
- 前記カレントコレクタが、金属性基材と均一なナノスケール炭素コーティングとを含み、前記炭素コーティングが本質的にグラファイトを含有する、請求項1に記載の電極。
- 請求項1に記載の電極を少なくとも1つ含む、リチウムポリマー電池。
- 金属性基材を提供することと、
前記金属性基材を、粒子を含む乾燥組成物でコーティングすることと、
を含む、カレントコレクタの製造方法であって、前記基材をコーティングすることには、0より大きく約30g/cm2より小さい、表面に対する垂直の圧力で、前記基材に対し前記粒子の有効量をアプリケータパッドを用いてバフがけすることが含まれ、前記アプリケータパッドは前記表面のある点に対して複数の方向で前記表面に対し平行な面で動き、これにより前記粒子のほぼ均一なコーティングが得られ、前記粒子はモース硬度が0.4〜3の間であり、最大寸法が約100マイクロメートル未満である、製造方法。 - 前記粒子が、カーボンブラック、グラファイト、ランプブラック、及びこれらの組み合わせから選択される、請求項12に記載の方法。
- 前記均一コーティングが、約200ナノメートル未満の厚さを有する、請求項12に記載の方法。
- 前記組成物が結合剤を更に含む、請求項12に記載の方法。
- 前記結合剤がポリフッ化ビニリデンを含む、請求項15に記載の方法。
- 前記コーティングされた基材を、少なくとも175℃の温度で少なくとも5分間の間加熱することを更に含む、請求項16に記載の方法。
- 前記コーティングされた基材が、約1000オーム/平方未満の表面抵抗を有する、請求項12に記載の方法。
- 前記カレントコレクタが、請求項12に記載の方法により製造された電極を少なくとも1つ含む、リチウムポリマー電池。
- 前記少なくとも1つの電極が、LiFePO4、VO2、及びこれらの組み合わせから選択される活物質を含む、請求項19に記載の電池。
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US12/200,044 US8178241B2 (en) | 2008-08-28 | 2008-08-28 | Electrode including current collector with nano-scale coating and method of making the same |
US12/200,044 | 2008-08-28 | ||
PCT/US2009/054117 WO2010025052A1 (en) | 2008-08-28 | 2009-08-18 | Electrode including current collector with nano-scale coating and method of making the same |
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JP2014132589A (ja) * | 2008-08-28 | 2014-07-17 | 3M Innovative Properties Co | ナノスケールコーティングを備えたカレントコレクタを含む電極及びその製造方法 |
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CN102132446A (zh) | 2011-07-20 |
EP2332201B1 (en) | 2016-11-30 |
KR20110059624A (ko) | 2011-06-02 |
US20100055569A1 (en) | 2010-03-04 |
EP2332201A1 (en) | 2011-06-15 |
US8178241B2 (en) | 2012-05-15 |
KR101601343B1 (ko) | 2016-03-08 |
CN105576238A (zh) | 2016-05-11 |
US20120231331A1 (en) | 2012-09-13 |
KR20140024480A (ko) | 2014-02-28 |
US9172085B2 (en) | 2015-10-27 |
WO2010025052A1 (en) | 2010-03-04 |
JP5502088B2 (ja) | 2014-05-28 |
KR101601569B1 (ko) | 2016-03-08 |
JP2014132589A (ja) | 2014-07-17 |
CN103855359A (zh) | 2014-06-11 |
JP5822968B2 (ja) | 2015-11-25 |
EP2731183A1 (en) | 2014-05-14 |
US20140315088A1 (en) | 2014-10-23 |
US8802288B2 (en) | 2014-08-12 |
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