JP5834139B2 - 電気化学素子用電極組立体及びこれを備えた電気化学素子 - Google Patents
電気化学素子用電極組立体及びこれを備えた電気化学素子 Download PDFInfo
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- JP5834139B2 JP5834139B2 JP2014518779A JP2014518779A JP5834139B2 JP 5834139 B2 JP5834139 B2 JP 5834139B2 JP 2014518779 A JP2014518779 A JP 2014518779A JP 2014518779 A JP2014518779 A JP 2014518779A JP 5834139 B2 JP5834139 B2 JP 5834139B2
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Description
前記第1セパレータは、前記単位セルが接合する一面のみに無機物粒子とバインダー高分子との混合物を含む第1多孔性電極接着層を備え、
前記単位セルに含まれている第2セパレータは、両面に無機物粒子とバインダー高分子との混合物を含む第2多孔性電極接着層を備えることを特徴とする電極組立体を提供する。
実施例1.単面多孔性電極接着層付セパレータをフォールディングフィルムとして使用したスタック‐フォールディング型電極組立体
ポリビニリデンフルオライド‐クロロトリフルオロエチレン共重合体(PVdF‐CTFE)及びシアノエチルプルラン(cyanoethylpullulan)を10:2の重量比でそれぞれアセトンに添加し、50℃で約12時間に亘って溶解させて高分子溶液を製造した。Al2O3粉末を高分子/無機物粒子=5/95の重量比になるように前記製造された高分子溶液に添加し、12時間に亘ってボールミル法を利用して無機物粒子を破砕及び分散してスラリーを製造した。このように製造されたスラリーの無機物粒子の粒径は平均600nmであった。
ポリビニリデンフルオライド‐クロロトリフルオロエチレン共重合体(PVdF‐CTFE)及びシアノエチルプルランを10:2の重量比でそれぞれアセトンに添加し、50℃で約12時間に亘って溶解させて高分子溶液を製造した。Al2O3粉末を高分子/無機物粒子=5/95の重量比になるように前記製造された高分子溶液に添加し、12時間に亘ってボールミル法を利用して無機物粒子を破砕及び分散してスラリーを製造した。このように製造されたスラリーの無機物粒子の粒径は平均600nmであった。
前記実施例1で製造された一面に多孔性電極接着層を備えた第1セパレータと、両面に多孔性電極接着層を備えた第2セパレータとに電解液を注入して各々のセパレータの単独抵抗を測定して下記表1に示した。
前記実施例1及び前記比較例1で製造されたスタック‐フォールディング型電極組立体の多様な充電状態(SOC、State Of Charge)で2秒間の出力を測定して下記表2に示した。
11:多孔性基材
12:第1多孔性電極接着層
20:第2セパレータ
21:多孔性基材
22:第2多孔性電極接着層
100:巻取り用フルセル電極組立体
110、120、130、140、150:フルセル
111:負極
112:正極
200:巻取り用バイセル電極組立体
210、220、230、240、250:バイセル
211:正極
212:負極
Claims (12)
- 複数の単位セルを長尺状の第1セパレータの一面に接合させた状態で順次巻き取った構造の電極組立体であって、
前記第1セパレータが、前記複数の単位セルが接合する一面のみに無機物粒子とバインダー高分子との混合物を含む第1電極多孔性接着層を備えてなり、
前記複数の単位セルに含まれている第2セパレータが、両面に無機物粒子とバインダー高分子との混合物を含む第2電極多孔性接着層を備えることを特徴とする、電極組立体。 - 前記複数の単位セルが、両面の電極の極性が互いに異なるフルセルであることを特徴とする、請求項1に記載の電極組立体。
- 前記複数の単位セルが、両面の電極の極性が互いに同一のバイセルであることを特徴とする、請求項1に記載の電極組立体。
- 前記第1セパレータ及び前記第2セパレータが、それぞれ独立して、ポリオレフィン系多孔性基材を含むことを特徴とする、請求項1〜3の何れか一項に記載の電極組立体。
- 前記ポリオレフィン系多孔性基材が、ポリエチレン、ポリプロピレン、ポリブチレン、及びポリペンテンからなる群より選択されたいずれか一つの高分子で形成されたことを特徴とする、請求項4に記載の電極組立体。
- 前記第1電極多孔性接着層及び第2電極多孔性接着層の前記無機物粒子が、それぞれ独立して、誘電率が5以上である無機物粒子、リチウムイオン伝達能を有する無機物粒子、及びこれらの混合物からなる群より選択された無機物粒子であることを特徴とする、請求項1〜5の何れか一項に記載の電極組立体。
- 前記誘電率が5以上である無機物粒子が、BaTiO3、Pb(Zrx、Ti1-x)O3(PZT、0<x<1)、Pb1-xLaxZr1-yTiyO3(PLZT、0<x<1、0<y<1)、(1−x)Pb(Mg1/3Nb2/3)O3‐xPbTiO3(PMN‐PT、0<x<1)、ハフニア(HfO2)、SrTiO3、SnO2、CeO2、MgO、NiO、CaO、ZnO、ZrO2、SiO2、Y2O3、Al2O3、SiC、及びTiO2からなる群より選択されたいずれか1つの無機物粒子、またはこれらの中で2種以上の混合物であることを特徴とする、請求項6に記載の電極組立体。
- 前記リチウムイオン伝達能を有する無機物粒子が、リチウムフォスフェイト(Li3PO4)、リチウムチタンフォスフェイト(LixTiy(PO4)3、0<x<2、0<y<3)、リチウムアルミニウムチタンフォスフェイト(LixAlyTiz(PO4)3、0<x<2、0<y<1、0<z<3)、(LiAlTiP)xOy系列ガラス(0<x<4、0<y<13)、リチウムランタンチタネート(LixLayTiO3、0<x<2、0<y<3)、リチウムゲルマニウムチオフォスフェイト(LixGeyPzSw、0<x<4、0<y<1、0<z<1、0<w<5)、リチウムナイトライド(LixNy、0<x<4、0<y<2)、SiS2系列ガラス(LixSiySz、0<x<3、0<y<2、0<z<4)、及びP2S5系列ガラス(LixPySz、0<x<3、0<y<3、0<z<7)からなる群より選択されたいずれか1つの無機物粒子、またはこれらの中で2種以上の混合物であることを特徴とする、請求項6に記載の電極組立体。
- 前記第1電極多孔性接着層及び前記第2電極多孔性接着層の前記バインダー高分子が、それぞれ独立して、ポリビニリデンフルオライド‐ヘキサフルオロプロピレン、ポリビニリデンフルオライド‐トリクロロエチレン、ポリメチルメタクリレート、ポリブチルアクリレート、ポリアクリロニトリル、ポリビニルピロリドン、ポリビニルアセテート、ポリビニルアルコール、エチレンビニルアセテート共重合体、ポリエチレンオキシド、ポリアリーレート、セルロースアセテート、セルロースアセテートブチレート、セルロースアセテートプロピオネート、シアノエチルプルラン、シアノエチルポリビニルアルコール、シアノエチルセルロース、シアノエチルスクロース、プルラン、及びカルボキシメチルセルロースからなる群より選択されたいずれか一つのバインダー高分子、またはこれらの中で2種以上の混合物であることを特徴とする、請求項1〜8の何れか一項に記載の電極組立体。
- 前記第1電極多孔性接着層及び前記第2電極多孔性接着層の前記無機物粒子とバインダー高分子との組成比が、それぞれ独立して、10:90ないし99:1重量比であることを特徴とする、請求項1〜9の何れか一項に記載の電極組立体。
- 請求項1〜10の何れか一項に記載の電極組立体を備えてなる、電気化学素子。
- 請求項1〜10の何れか一項に記載の電極組立体と、及び電解質とともに前記電極組立体を密封収納するケースとを備えてなることを特徴とする、二次電池。
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KR100966024B1 (ko) * | 2007-04-24 | 2010-06-24 | 주식회사 엘지화학 | 이종의 세퍼레이터를 구비한 전기화학소자 |
KR101002161B1 (ko) * | 2007-11-29 | 2010-12-17 | 주식회사 엘지화학 | 다공성 코팅층이 형성된 세퍼레이터, 그 제조방법 및 이를 구비한 전기화학소자 |
KR101014817B1 (ko) * | 2007-12-14 | 2011-02-14 | 주식회사 엘지화학 | 안전 부재를 포함하고 있는 스택/폴딩형 전극조립체 및그것의 제조방법 |
KR101040482B1 (ko) * | 2008-03-04 | 2011-06-09 | 주식회사 엘지화학 | 다공성 코팅층이 코팅된 세퍼레이터 및 이를 구비한 전기화학소자 |
KR101027315B1 (ko) * | 2009-02-27 | 2011-04-06 | 성균관대학교산학협력단 | 나노 와이어의 제조방법 |
KR101054976B1 (ko) * | 2009-03-31 | 2011-08-05 | 주식회사 엘지화학 | 다공성 코팅층이 형성된 세퍼레이터 및 이를 구비한 전기화학소자 |
KR101604834B1 (ko) * | 2009-11-24 | 2016-03-18 | 주식회사 엘지화학 | 전극 조립체 제조용 구조체 및 이로부터 제조되는 스택-폴딩형 전극 조립체 |
CN102064300A (zh) * | 2010-12-25 | 2011-05-18 | 佛山塑料集团股份有限公司 | 一种锂离子二次电池用多孔复合隔膜及其制备方法 |
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- 2011-12-06 WO PCT/KR2011/009390 patent/WO2013005898A1/ko active Application Filing
- 2011-12-06 EP EP11869174.0A patent/EP2731186B1/en active Active
- 2011-12-06 CN CN201180072061.3A patent/CN103636046B/zh active Active
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KR20130006256A (ko) | 2013-01-16 |
CN103636046B (zh) | 2017-09-29 |
JP2014524112A (ja) | 2014-09-18 |
US20130011715A1 (en) | 2013-01-10 |
EP2731186A4 (en) | 2015-01-21 |
WO2013005898A1 (ko) | 2013-01-10 |
EP2731186B1 (en) | 2017-09-27 |
KR101367754B1 (ko) | 2014-02-27 |
CN103636046A (zh) | 2014-03-12 |
EP2731186A1 (en) | 2014-05-14 |
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