JP2009199825A - 電極群を有するデバイス - Google Patents
電極群を有するデバイス Download PDFInfo
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- JP2009199825A JP2009199825A JP2008039000A JP2008039000A JP2009199825A JP 2009199825 A JP2009199825 A JP 2009199825A JP 2008039000 A JP2008039000 A JP 2008039000A JP 2008039000 A JP2008039000 A JP 2008039000A JP 2009199825 A JP2009199825 A JP 2009199825A
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- electrode
- electrode sheet
- container
- negative electrode
- sheet
- Prior art date
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- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
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- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- SRPWOOOHEPICQU-UHFFFAOYSA-N trimellitic anhydride Chemical compound OC(=O)C1=CC=C2C(=O)OC(=O)C2=C1 SRPWOOOHEPICQU-UHFFFAOYSA-N 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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Abstract
【解決手段】電極タブを有する正極シート、電極タブを有する負極シート、および該正極シートと該負極シートとの間を絶縁するように配置されるセパレータからなる電極群が、単一の容器内に複数個含まれてなることを特徴とする、デバイス。蓄電デバイスとして使用される、前記のデバイス。非水電解液二次電池として使用される、前記のデバイス。
【選択図】図2
Description
(1) 電極タブを有する正極シート、電極タブを有する負極シート、および該正極シートと該負極シートとの間を絶縁するように配置されるセパレータからなる電極群が、単一の容器内に複数個含まれてなることを特徴とする、デバイス。
(2) 電極タブを有する正極シート、電極タブを有する負極シート、および該正極シートと該負極シートとの間を絶縁するように配置されるセパレータを、巻回してなる電極群が、単一の容器内に複数個含まれてなる、(1)のデバイス。
(3) 前記容器がラミネートフィルムによって構成されている、(1)または(2)のデバイス。
(4) 全ての電極タブが前記容器の外部に取出されている、(1)〜(3)のいずれかのデバイス。
(5) 前記複数個の電極群のうち少なくとも2個の電極群が、前記容器の内部で、各電極群が有する電極タブの接続により、直列または並列に接続されている、(1)〜(3)のいずれかのデバイス。
(6) 蓄電デバイスとして使用される、(1)〜(5)のいずれかのデバイス。
(7) 前記容器内に、イオン伝導を可能とする材料をさらに含み、該材料が前記複数個の電極群で共有される、(1)〜(6)のいずれかのデバイス。
(8) 前記材料が、リチウムイオンおよび/またはナトリウムイオンの伝導を可能とする材料である、(7)のデバイス。
(9) 電池として使用される、(7)または(8)のデバイス。
(10) 前記材料が非水電解液である、(7)〜(9)のいずれかのデバイス。
(11) 非水電解液二次電池として使用される、(7)〜(10)のいずれかのデバイス。
(ここで、xの範囲、yの範囲は、それぞれ0.9≦x≦1.2、0≦y≦0.3であり、MはCo、FeおよびMnから選ばれる1種以上の元素を表す。)
(ここで、xの範囲、zの範囲は、それぞれ0.9≦x≦1.2、0.3≦z≦0.9であり、MはCo、FeおよびMnから選ばれる1種以上の元素を表す。)
(1)耐熱層用塗工液の製造
N−メチル−2−ピロリドン(NMP)4200gに塩化カルシウム272.7gを溶解した後、パラフェニレンジアミン132.9gを添加して完全に溶解させた。得られた溶液に、テレフタル酸ジクロライド243.3gを徐々に添加して重合し、パラアラミドを得て、さらにNMPで希釈して、濃度2.0質量%のパラアラミド溶液を得た。得られたパラアラミド溶液100gに、第1のアルミナ粉末2g(日本アエロジル社製、アルミナC,平均粒子径0.02μm)と第2のアルミナ粉末2g(住友化学株式会社製スミコランダム、AA03、平均粒子径0.3μm)とをフィラーとして計4g添加して混合し、ナノマイザーで3回処理し、さらに1000メッシュの金網で濾過、減圧下で脱泡して、耐熱層用スラリー状塗工液を製造した。パラアラミドおよびアルミナ粉末の合計質量に対するアルミナ粉末(フィラー)の質量は、67質量%となる。
熱可塑性樹脂を含有する多孔質フィルムとしては、ポリエチレン製多孔質膜(膜厚12μm、透気度140秒/100cc、平均孔径0.1μm、空孔率50%)を用いた。厚み100μmのPETフィルムの上に上記ポリエチレン製多孔質膜を固定し、テスター産業株式会社製バーコーターにより、多孔質膜上に耐熱層用スラリー状塗工液を塗工した。PETフィルム上の塗工された該多孔質膜を一体にしたまま、貧溶媒である水中に浸漬させ、パラアラミド多孔質膜(耐熱層)を析出させた後、溶媒を乾燥させて、耐熱層と多孔質フィルムとが積層された積層多孔質フィルムを得た。
積層多孔質フィルムの厚みは16μmであり、パラアラミド多孔質膜(耐熱層)の厚みは4μmであった。積層多孔質フィルムの透気度は180秒/100cc、空孔率は50%であった。積層多孔質フィルムにおける耐熱層の断面を走査型電子顕微鏡(SEM)により観察をしたところ、0.03μm〜0.06μm程度の比較的小さな微細孔と0.1μm〜1μm程度の比較的大きな微細孔とを有することがわかった。
積層多孔質フィルムの厚み、多孔質フィルムの厚みは、JIS規格(K7130−1992)に従い、測定した。また、耐熱層の厚みとしては、積層多孔質フィルムの厚みから多孔質フィルムの厚みを差し引いた値を用いた。
積層多孔質フィルムの透気度は、JIS P8117に基づいて、株式会社安田精機製作所製のデジタルタイマー式ガーレー式デンソメータで測定した。
得られた積層多孔質フィルムのサンプルを一辺の長さ10cmの正方形に切り取り、質量W(g)と厚みD(cm)を測定した。サンプル中のそれぞれの層の質量(Wi)を求め、Wiとそれぞれの層の材質の真比重(g/cm3)とから、それぞれの層の体積を求めて、次式より空孔率(体積%)を求めた。
空孔率(体積%)=100×{1−(W1/真比重1+W2/真比重2+・・+Wn/真比重n)/(10×10×D)}
2 負極シート
3 セパレータ
4 セパレータ
5 電極タブ
6 電極群
7 ラミネートフィルム
8 ラミネート電池
9 電極群A
10 電極群B
Claims (11)
- 電極タブを有する正極シート、電極タブを有する負極シート、および該正極シートと該負極シートとの間を絶縁するように配置されるセパレータからなる電極群が、単一の容器内に複数個含まれてなることを特徴とする、デバイス。
- 電極タブを有する正極シート、電極タブを有する負極シート、および該正極シートと該負極シートとの間を絶縁するように配置されるセパレータを、巻回してなる電極群が、単一の容器内に複数個含まれてなる、請求項1記載のデバイス。
- 前記容器がラミネートフィルムによって構成されている、請求項1または2記載のデバイス。
- 全ての電極タブが前記容器の外部に取出されている、請求項1〜3のいずれか1項に記載のデバイス。
- 前記複数個の電極群のうち少なくとも2個の電極群が、前記容器の内部で、各電極群が有する電極タブの接続により、直列または並列に接続されている、請求項1〜3のいずれか1項に記載のデバイス。
- 蓄電デバイスとして使用される、請求項1〜5のいずれか1項に記載のデバイス。
- 前記容器内に、イオン伝導を可能とする材料をさらに含み、該材料が前記複数個の電極群で共有される、請求項1〜6のいずれか1項に記載のデバイス。
- 前記材料が、リチウムイオンおよび/またはナトリウムイオンの伝導を可能とする材料である、請求項7記載のデバイス。
- 電池として使用される、請求項7または8に記載のデバイス。
- 前記材料が非水電解液である、請求項7〜9のいずれか1項に記載のデバイス。
- 非水電解液二次電池として使用される、請求項7〜10のいずれか1項に記載のデバイス。
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JP2008039000A JP2009199825A (ja) | 2008-02-20 | 2008-02-20 | 電極群を有するデバイス |
US12/372,845 US20090208831A1 (en) | 2008-02-20 | 2009-02-18 | Device having electrode group |
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