JP5795646B2 - セパレータ及びそれを備える電気化学素子 - Google Patents
セパレータ及びそれを備える電気化学素子 Download PDFInfo
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Description
[数式1]
空隙率=(1−(無機物粒子の重量比/無機物粒子の密度+高分子バインダーの重量比/高分子バインダーの密度))
[数式2]
厚さ当り通気度=(セパレータの通気度−多孔性基材の通気度)/(セパレータの厚さ−多孔性基材の厚さ)
望ましくは、前記孔隙率(空隙率)は0.5以上1未満であり、前記厚さ当りの通気度は5以上80以下である。
[数式1]
空隙率=(1−(無機物粒子の重量比/無機物粒子の密度+高分子バインダーの重量比/高分子バインダーの密度))
[数式2]
厚さ当り通気度=(セパレータの通気度−多孔性基材の通気度)/(セパレータの厚さ−多孔性基材の厚さ)
実施例1.アルミナ/PVdF‐HFP/シアノエチルポリビニルアルコール混合物を含む多孔性コーティング層を備えるセパレータの製造
PVdF‐HFP 5重量部とシアノエチルポリビニルアルコール5重量部とをアセトンに溶解させたバインダー溶液に、アルミナ(密度:4.0g/cm3)90重量部を添加した後、ボールミル(ball mill)法で分散させてスラリーを用意した。
シアノエチルポリビニルアルコール5重量部をアセトンに溶解させたバインダー溶液に、アルミナ95重量部を添加した後、ボールミル法で分散させてスラリーを用意した。
PVdF‐HFP 5重量部とシアノエチルポリビニルアルコール5重量部とをアセトンに溶解させたバインダー溶液に、BaTiO3(密度:5.7g/cm3)90重量部を添加した後、ボールミル法で分散させてスラリーを用意した。
PVdF‐HFP 10重量部とシアノエチルポリビニルアルコール5重量部とをアセトンに溶解させたバインダー溶液に、アルミナ85重量部を添加した後、ボールミル法で分散させてスラリーを用意した。
PVdF‐HFP 2重量部とシアノエチルポリビニルアルコール3重量部とをアセトンに溶解させたバインダー溶液に、アルミナ95重量部を添加した後、ボールミル法で分散させてスラリーを用意した。
PVdF‐HFP 10重量部とシアノエチルポリビニルアルコール10重量部とをアセトンに溶解させたバインダー溶液に、アルミナ80重量部を添加した後、ボールミル法で分散させてスラリーを用意した。
PVdF‐HFP 20重量部をアセトンに溶解させたバインダー溶液にアルミナ80重量部を添加した後、ボールミル法で分散させてスラリーを用意した。
PVdF‐HFP 25重量部とシアノエチルポリビニルアルコール25重量部とをアセトンに溶解させたバインダー溶液に、アルミナ50重量部を添加した後、ボールミル法で分散させてスラリーを用意した。
実施例1ないし5及び比較例1ないし3で製造されたセパレータの物性を下記表1に示した。セパレータの物性のうち通気度は、東洋精機(日本)製のガーレー式デンソメーター(Gurley Type Densometer、図1参照)を用いて、100mlの空気が多孔性基材またはセパレータを通過する時間を測定したものであり、厚さは多孔性基材またはセパレータを5cm×5cmに切断した後、Tesa(スイス)製の装備(図2参照)を用いて4つの角及び真中の厚さを5回測定した値の平均値である。
Claims (10)
- セパレータであって、
多孔性基材と、及び
前記多孔性基材の少なくとも一面に形成され、無機物粒子と高分子バインダーとの混合物を含む多孔性コーティング層とを備えてなり、
下記数式1及び数式2で表される空隙率×厚さ当りの通気度値が18.41〜35.62であり、
前記空隙率が0.5以上1未満であり、
前記厚さ当りの通気度が5以上80以下であることを特徴とする、セパレータ。
空隙率=(1−(無機物粒子の重量比/無機物粒子の密度+高分子バインダーの重量比/高分子バインダーの密度)) [数式1]
厚さ当り通気度=(セパレータの通気度−多孔性基材の通気度)/(セパレータの厚さ−多孔性基材の厚さ) [数式2] - 前記厚さ当りの通気度が14以上52以下であることを特徴とする、請求項1に記載のセパレータ。
- 前記多孔性基材が、ポリオレフィン系多孔性基材であることを特徴とする、請求項1又は2に記載のセパレータ。
- 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るいずれか1つの高分子で形成されたことを特徴とする、請求項3に記載のセパレータ。
- 前記無機物粒子が、誘電率定数が5以上の無機物粒子、リチウムイオン伝達能力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1〜4の何れか一項に記載のセパレータ。
- 前記誘電率定数が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るいずれか1つの無機物粒子またはこれらのうち2種以上の混合物であることを特徴とする、請求項5に記載のセパレータ。
- 前記リチウムイオン伝達能力を有する無機物粒子が、リチウムホスフェート(Li3PO4)、リチウムチタンホスフェート(LixTiy(PO4)3、0<x<2、0<y<3)、リチウムアルミニウムチタンホスフェート(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ホスフェート(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)、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るいずれか1つの無機物粒子またはこれらのうち2種以上の混合物であることを特徴とする、請求項5に記載のセパレータ。
- 前記バインダー高分子が、ポリフッ化ビニリデン‐ヘキサフルオロプロピレン、ポリフッ化ビニリデン‐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、ポリエチレンオキサイド、ポリアリレート、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、カルボキシルメチルセルロース、及び分子量10,000g/mol以下の低分子化合物からなる群より選択されるいずれか1つのバインダー高分子またはこれらのうち2種以上の混合物であることを特徴とする、請求項1〜7の何れか一項に記載のセパレータ。
- 電気化学素子であって、
正極と、負極と、前記正極と負極との間に介在するセパレータとを備えてなり、
前記セパレータが、請求項1〜8の何れか一項に記載のセパレータであることを特徴とする、電気化学素子。 - 前記電気化学素子が、リチウム二次電池であることを特徴とする、請求項9に記載の電気化学素子。
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Application Number | Priority Date | Filing Date | Title |
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KR10-2011-0112980 | 2011-11-01 | ||
KR20110112980 | 2011-11-01 | ||
KR10-2012-0122137 | 2012-10-31 | ||
KR1020120122137A KR101312431B1 (ko) | 2011-11-01 | 2012-10-31 | 세퍼레이터 및 이를 구비한 전기화학소자 |
PCT/KR2012/009075 WO2013066052A1 (ko) | 2011-11-01 | 2012-10-31 | 세퍼레이터 및 이를 구비한 전기화학소자 |
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JP5795646B2 true JP5795646B2 (ja) | 2015-10-14 |
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US (1) | US9786890B2 (ja) |
EP (1) | EP2775553A4 (ja) |
JP (1) | JP5795646B2 (ja) |
KR (1) | KR101312431B1 (ja) |
CN (1) | CN103329306B (ja) |
WO (1) | WO2013066052A1 (ja) |
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CA2586062C (en) | 2004-12-08 | 2013-04-02 | Hitachi Maxell, Ltd. | Separator for electrochemical device, and electrochemical device |
KR101676446B1 (ko) * | 2013-09-30 | 2016-11-15 | 주식회사 엘지화학 | 리튬 이차전지용 세퍼레이터의 제조방법, 그 방법에 의해 제조된 세퍼레이터, 및 이를 포함하는 리튬 이차전지 |
US10256471B2 (en) * | 2014-12-22 | 2019-04-09 | Samsung Sdi Co., Ltd. | Electrode winding element for non-aqueous electrolyte rechareable battery, non-aqueous electrolyte rechargeable lithium battery including same, method of preparing same |
US9508976B2 (en) | 2015-01-09 | 2016-11-29 | Applied Materials, Inc. | Battery separator with dielectric coating |
US10637028B2 (en) * | 2015-07-10 | 2020-04-28 | Lg Chem, Ltd. | Separator and electrochemical device comprising same |
CN107436670A (zh) * | 2017-08-04 | 2017-12-05 | 合肥支招信息科技有限公司 | 一种可扩充笔记本充电电池 |
KR102357946B1 (ko) | 2017-08-17 | 2022-02-08 | 어플라이드 머티어리얼스, 인코포레이티드 | 올레핀 분리기가 없는 Li-이온 배터리 |
KR102277377B1 (ko) | 2018-05-11 | 2021-07-14 | 주식회사 엘지에너지솔루션 | 난연성 이차전지용 분리막 |
WO2020000164A1 (zh) * | 2018-06-26 | 2020-01-02 | 深圳市星源材质科技股份有限公司 | 一种复合锂电池隔膜及其制备方法 |
KR102657356B1 (ko) | 2018-08-21 | 2024-04-16 | 어플라이드 머티어리얼스, 인코포레이티드 | 배터리들을 위한 분리기 상의 초박형 세라믹 코팅 |
CN110635133B (zh) * | 2019-08-30 | 2021-08-06 | 东莞赣锋电子有限公司 | 一种快充型锂离子电池及其制备方法 |
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JP2013544430A (ja) | 2013-12-12 |
WO2013066052A1 (ko) | 2013-05-10 |
KR20130048177A (ko) | 2013-05-09 |
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