JP2016539476A - 高延伸特性の分離膜を有する電極組立体及びこれを含む二次電池 - Google Patents
高延伸特性の分離膜を有する電極組立体及びこれを含む二次電池 Download PDFInfo
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- JP2016539476A JP2016539476A JP2016536143A JP2016536143A JP2016539476A JP 2016539476 A JP2016539476 A JP 2016539476A JP 2016536143 A JP2016536143 A JP 2016536143A JP 2016536143 A JP2016536143 A JP 2016536143A JP 2016539476 A JP2016539476 A JP 2016539476A
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Abstract
Description
102 単位セル
103 単位セル
104 単位セル
105 単位セル
110 分離フィルム
210 第1バイセル
221 第2フルセル
222 第2フルセル
230 第1バイセル
241 一般分離膜
250 分離フィルム
310 第3バイセル
321 第4フルセル
322 第4フルセル
330 第3バイセル
341 第4フルセル
342 第4フルセル
350 分離フィルム
360 絶縁テープ
400a バイセル
400b バイセル
401 正極活物質
402 負極活物質
403 正極集電体
404 負極集電体
405 分離膜
420 負極
430 第2正極
431 第1正極
500a バイセル
500b 第2バイセル
501 正極活物質
502 負極活物質
503 正極集電体
504 負極集電体
505 一般分離膜
510 第2負極
520 第2正極
600a フルセル
600b フルセル
601 正極活物質
602 負極活物質
603 正極集電体
604 第2負極集電体
605 一般分離膜
610 第2負極
620 第2正極
701 分離膜基材
702 バインダー高分子活性層
710 分離フィルム
711 正極
712 負極
720 一般分離膜
740 針状導体
801 分離膜基材
802 バインダー高分子活性層
810 分離フィルム
811 正極
812 負極
820 安全分離膜
840 針状導体
Claims (24)
- 集電体に電極活物質を含む電極合剤がそれぞれ塗布されている正極と負極との間に分離膜が介在している二つ以上の単位セルをシート状の分離フィルムで巻き取った構造のスタック/フォルディング型電極組立体であって、
前記正極が、集電体としてアルミニウムホイルに正極合剤がコーティングされている構造であり、前記負極が、集電体としてアルミニウム以外の金属ホイルに負極合剤がコーティングされている構造からなっており;
前記単位セルが、一つ以上のフルセル及び/又はバイセルで構成されており;
前記単位セルのうち電極組立体の最外郭に位置した単位セルが、最外側の電極が片面電極からなっており、前記片面電極において、電極合剤は集電体の両面のうち分離膜と対面する一面にのみ塗布されており;
前記分離フィルムの延伸率が、分離膜の延伸率より相対的に大きいことを特徴とする電極組立体。 - 前記電極組立体の最外郭に位置した各単位セルにおいて、最外側の電極である片面電極の電極合剤が対面する分離膜が安全分離膜からなっており、前記安全分離膜の延伸率が、残りの単位セルに含まれた分離膜である一般分離膜の延伸率より相対的に大きいことを特徴とする、請求項1に記載の電極組立体。
- 前記電極組立体が、最外郭に配置される第1バイセル、及び残りの部分に配置される第2バイセルを含むことを特徴とする、請求項1に記載の電極組立体。
- 前記第1バイセルが、片面正極の第1正極、両面負極の第2負極及び両面正極の第2正極が分離膜を介在して順次積層された構造、又は片面負極の第1負極、両面正極の第2正極及び両面負極の第2負極が分離膜を介在して順次積層された構造であり;
前記第2バイセルが、第2負極、第2正極及び第2負極が分離膜を介在して順次積層された構造、又は第2正極、第2負極及び第2正極が分離膜を介在して順次積層された構造であることを特徴とする、請求項3に記載の電極組立体。 - 前記単位セルが、フルセルからなっており、電極組立体の最外郭に配置される第1フルセルと、残りの部分に配置される第2フルセルと、を含んでい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フルセルが、片面正極の第1正極、分離膜及び両面負極の第2負極が順次積層された構造、又は片面負極の第1負極、分離膜及び両面正極の第2正極が順次積層された構造であり;
前記第2フルセルが、両面負極の第2負極、分離膜及び両面負極の第2負極が順次積層された構造、又は両面正極の第2正極、分離膜及び両面負極の第2負極が順次積層された構造であることを特徴とする、請求項5に記載の電極組立体。 - 前記電極組立体が、最外郭に配置される第3バイセル、及び残りの部分に配置される第4バイセルを含むことを特徴とする、請求項2に記載の電極組立体。
- 前記第3バイセルが、片面正極の第1正極、両面負極の第2負極及び両面正極の第2正極が安全分離膜を介在して順次積層された構造、又は片面負極の第1負極、両面正極の第2正極及び両面負極の第2負極が安全分離膜を介在して順次積層された構造であり;
前記第4バイセルが、第2負極、第2正極及び第2負極が一般分離膜を介在して順次積層された構造、又は第2正極、第2負極及び第2正極が一般分離膜を介在して順次積層された構造であることを特徴とする、請求項7に記載の電極組立体。 - 前記単位セルが、フルセルからなっており、電極組立体の最外郭に配置される第3フルセルと、残りの部分に配置される第4フルセルと、を含むことを特徴とする、請求項2に記載の電極組立体。
- 前記第3フルセルが、片面正極の第1正極、安全分離膜及び両面負極の第2負極が順次積層された構造、又は片面負極の第1負極、安全分離膜及び両面正極の第2正極が順次積層された構造であり;
前記第4フルセルが、両面負極の第2負極、一般分離膜及び両面負極の第2負極が順次積層された構造、又は両面正極の第2正極、一般分離膜及び両面負極の第2負極が順次積層された構造であることを特徴とする、請求項9に記載の電極組立体。 - 前記分離フィルム及び安全分離膜の延伸率が、前記一般分離膜の延伸率を基準にして105%〜500%であることを特徴とする、請求項1又は2に記載の電極組立体。
- 前記分離フィルム及び安全分離膜の延伸率が、前記一般分離膜の延伸率を基準にして120%〜300%であることを特徴とする、請求項11に記載の電極組立体。
- 前記分離フィルム及び分離膜の素材あg、有機/無機複合多孔性のSRS(Safety―Reinforcing Separators)分離膜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SRS分離膜が、ポリオレフィン系列分離膜基材上に無機物粒子及びバインダー高分子からなる活性層が塗布されていることを特徴とする、請求項13に記載の電極組立体。
- 前記無機物粒子が、(a)圧電性を有する無機物粒子、及び(b)リチウムイオン伝達能力を有する無機物粒子で構成された群から選ばれた1種以上であることを特徴とする、請求項14に記載の電極組立体。
- 前記圧電性を有する無機物粒子が、BaTiO3、Pb(Zr,Ti)O3(PZT)、Pb1−xLaxZr1−yTiyO3(PLZT)、Pb(Mg1/3Nb2/3)O3―PbTiO3(PMN―PT)、ハフニア(hafnia)(HfO2)、SrTiO3、SnO2、CeO2、MgO、NiO、CaO、ZnO、ZrO2、Y2O3、Al2O3、TiO2、SiC又はこれらの混合体からなる群から選ばれる1種以上であることを特徴とする、請求項15に記載の電極組立体。
- 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)又はこれらの混合物からなる群から選ばれた1種以上であることを特徴とする、請求項15に記載の電極組立体。
- 前記分離フィルム及び安全分離膜が、16マイクロメートル以上〜30マイクロメートル以下の厚さからなっており、前記一般分離膜が、10マイクロメートル以上〜16マイクロメートル未満の厚さからなることを特徴とする、請求項1又は2に記載の電極組立体。
- 前記分離フィルム及び安全分離膜の厚さが20マイクロメートルであることを特徴とする、請求項18に記載の電極組立体。
- 請求項1による電極組立体が電池ケースに内蔵されている二次電池。
- 前記電池ケースが、アルミニウムラミネートシートのパウチ型ケース又は金属缶型ケースであることを特徴とする、請求項20に記載の二次電池。
- 請求項20による二次電池を単位電池として含む電池パック。
- 請求項22による電池パックを電源として含んでいることを特徴とするデバイス。
- 前記デバイスが、携帯電話、携帯用コンピュータ、スマートフォン、スマートパッド、タブレットPC、及びネットブックから選ばれることを特徴とする、請求項23に記載のデバイス。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2014-0003146 | 2014-01-10 | ||
KR1020140003140A KR101675976B1 (ko) | 2014-01-10 | 2014-01-10 | 고 연신 특성의 분리막을 가진 전극조립체 및 이를 포함하는 이차전지 |
KR1020140003146A KR101675944B1 (ko) | 2014-01-10 | 2014-01-10 | 고 연신 특성의 분리막을 가진 전극조립체 및 이를 포함하는 이차전지 |
PCT/KR2015/000216 WO2015105365A1 (ko) | 2014-01-10 | 2015-01-09 | 고 연신 특성의 분리막을 가진 전극조립체 및 이를 포함하는 이차전지 |
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KR102307909B1 (ko) * | 2015-05-08 | 2021-10-01 | 삼성에스디아이 주식회사 | 리튬 전지 |
KR102120446B1 (ko) * | 2015-07-17 | 2020-06-08 | 주식회사 엘지화학 | 안전성이 향상된 전기화학소자용 세퍼레이터 및 이를 포함하는 전기화학소자 |
KR102354357B1 (ko) * | 2016-12-09 | 2022-01-20 | 삼성에스디아이 주식회사 | 이차 전지 |
JP6844403B2 (ja) * | 2017-04-28 | 2021-03-17 | トヨタ自動車株式会社 | 積層電池 |
US11322799B2 (en) * | 2017-12-01 | 2022-05-03 | Lg Energy Solution, Ltd. | Electrode including single-sided electrode with inorganic coating layer attached to slurry on collector and electrode assembly including the same |
KR102270120B1 (ko) * | 2017-12-01 | 2021-06-28 | 주식회사 엘지에너지솔루션 | 전극 및 전극조립체 |
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CN105794033B (zh) | 2018-09-14 |
US10236533B2 (en) | 2019-03-19 |
WO2015105365A1 (ko) | 2015-07-16 |
US20160308250A1 (en) | 2016-10-20 |
PL3093911T3 (pl) | 2019-06-28 |
EP3093911A4 (en) | 2017-08-16 |
CN105794033A (zh) | 2016-07-20 |
JP6312175B2 (ja) | 2018-04-18 |
EP3093911B1 (en) | 2019-03-06 |
EP3093911A1 (en) | 2016-11-16 |
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