JP2015506549A - 活物質が充填されたフィルム形態の陰極電極及びその製造方法 - Google Patents
活物質が充填されたフィルム形態の陰極電極及びその製造方法 Download PDFInfo
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Abstract
Description
4. 多孔性フィルム基材の細孔に充填された陰極電極はその強度が高くウェアラブル機器用バッテリー用の電極として曲げの繰り返し耐性にも優れる。
市販されるSiナノ粒子(Sigma−Aldrich Si nanopowder(633097、<100nm))にバインダー(PVDF)及び導電補助剤(Sigma−Aldrich GMC(graphitized mesoporous carbons、699627、<35nm))を8:1:1の重量比で混合した後、これを有基溶媒(NMP)10ml中に分散させて活物質スラリーを製造した。続いて、集電体上に位置した多孔性フィルム(CLPE、100nm、300MPa)に25μm厚さで塗布した後、110℃で加熱されたホット−プレート上で有基溶媒を5時間の間蒸発させて、前記活物質スラリーが充填された多孔性フィルム形態の陰極電極を製造した(活物質充填率:36%)
機械的粉砕を通じて準備した平均粒子サイズが50nmのSiナノ粒子とバインダー(PVDF)及び導電補助剤(Sigma−Aldrich GMC(graphitized mesoporous carbons、699627、<35nm))を6.5:2.5:1の重量比で混合した後、これを有基溶媒(NMP)10ml中に分散させて活物質スラリーを製造した。続いて、集電体上に位置した多孔性フィルム(CLPE、100nm、300MPa)に25μm厚さで塗布した後、110℃で加熱されたホット−プレート上で有基溶媒を5時間の間蒸発させて、前記活物質スラリーが充填された多孔性フィルム形態の陰極電極を製造した(活物質充填率:29.25%)。
前記実施例1と同一なSiナノ粒子、バインダー及び導電補助剤を使用するが、多孔性フィルム上に充填させないで、有基溶媒に分散させた活物質スラリーを製造して基準陰極電極を製造した。すなわち、Si活物質とバインダー及び導電補助剤の割合を8:1:1として、有基溶媒(NMP)20mlを使用してペースト混合機(paste mixer)でスラリーを準備した。継いて、塗布後のスラリー塗布量が3.5〜4mg/cm2(乾燥重量基準)になるように集電板上に塗布した後、110℃のコンベクターヒーター(convection heater)内で15分乾燥して基準陰極電極を製造する。
前記実施例1及び比較例で製造した陰極電極を使用して2032タイプハーフコインセルを製造して充放電特性及び寿命特性を評価した。
前記実施例1で製造した陰極電極に使用された多孔性フィルムの活物質の充電の前後の表面及び断面をSEMを利用して観察し、その結果を図5、図6、図7及び図8に各々示した。
Claims (8)
- 多孔性フィルム基材;及び
前記多孔性フィルム基材の細孔に陰極活物質ナノ粒子が充填された陰極電極。 - 前記多孔性フィルム基材の細孔にバインダーまたは導電補助剤が単独でまたは混合されてさらに充填されることを特徴とする請求項1に記載の陰極電極。
- 前記多孔性フィルム基材の細孔は、0.01〜10μmの直径を有することを特徴とする請求項1に記載の陰極電極。
- 前記陰極活物質は、合金系陰極活物質であることを特徴とする請求項1に記載の陰極電極。
- 前記バインダーは、PVDF(ポリビニリデンフルオライド)及びPI(ポリイミド)からなる群より一種以上選択されることを特徴とする請求項2に記載の陰極電極。
- 前記導電補助剤は、グレフェン(graphene)、グレフェン類似体、黒鉛及び炭素纎維からなる群より一種以上選択されることを特徴とする請求項2に記載の陰極電極。
- 多孔性フィルム基材を準備する段階と、
陰極活物質ナノ粒子を有基溶媒中に分散させて活物質スラリーを製造する段階と、
前記有基溶媒中に分散された活物質スラリーを前記多孔性フィルム基材の細孔に充填する段階と、を含むことを特徴とする陰極電極の製造方法。 - 前記活物質スラリーは、バインダーまたは導電補助剤が単独でまたは混合されてさらに含まれることを特徴とする請求項7に記載の陰極電極の製造方法。
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KR1020110147353A KR20130078414A (ko) | 2011-12-30 | 2011-12-30 | 활물질이 충진된 필름 형태의 음극 전극 및 그의 제조방법 |
KR10-2011-0147353 | 2011-12-30 | ||
PCT/KR2012/011618 WO2013100652A1 (ko) | 2011-12-30 | 2012-12-27 | 활물질이 충진된 필름 형태의 음극 전극 및 그의 제조방법 |
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EP (1) | EP2800170A4 (ja) |
JP (1) | JP2015506549A (ja) |
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CN109256548A (zh) * | 2018-09-06 | 2019-01-22 | 珠海光宇电池有限公司 | 一种高强度超轻复合锂带及其制备方法 |
CN112117029B (zh) * | 2020-09-30 | 2022-08-09 | 浙江长宇新材料股份有限公司 | 一种复合导电膜及其制备方法 |
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JPH07254408A (ja) * | 1993-12-14 | 1995-10-03 | Yuasa Corp | 鉛蓄電池 |
JPH08321310A (ja) * | 1995-03-17 | 1996-12-03 | Canon Inc | 二次電池用電極、その製造方法及び該電極を有する二次電池 |
JP2009283452A (ja) * | 2008-04-23 | 2009-12-03 | Nissan Motor Co Ltd | リチウムイオン二次電池用電極およびこれを用いた電池 |
JP2011060521A (ja) * | 2009-09-08 | 2011-03-24 | Nissan Motor Co Ltd | 二次電池用電極の製造方法 |
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US20140370384A1 (en) | 2014-12-18 |
CN104011903A (zh) | 2014-08-27 |
EP2800170A1 (en) | 2014-11-05 |
WO2013100652A1 (ko) | 2013-07-04 |
EP2800170A4 (en) | 2015-08-05 |
KR20130078414A (ko) | 2013-07-10 |
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