JP2017500708A - 安全分離膜を有する電極組立体及びそれを含む二次電池 - Google Patents
安全分離膜を有する電極組立体及びそれを含む二次電池 Download PDFInfo
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- JP2017500708A JP2017500708A JP2016541349A JP2016541349A JP2017500708A JP 2017500708 A JP2017500708 A JP 2017500708A JP 2016541349 A JP2016541349 A JP 2016541349A JP 2016541349 A JP2016541349 A JP 2016541349A JP 2017500708 A JP2017500708 A JP 2017500708A
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- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 description 1
- VROAXDSNYPAOBJ-UHFFFAOYSA-N lithium;oxido(oxo)nickel Chemical compound [Li+].[O-][Ni]=O VROAXDSNYPAOBJ-UHFFFAOYSA-N 0.000 description 1
- URIIGZKXFBNRAU-UHFFFAOYSA-N lithium;oxonickel Chemical compound [Li].[Ni]=O URIIGZKXFBNRAU-UHFFFAOYSA-N 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229940017219 methyl propionate Drugs 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- LYGJENNIWJXYER-UHFFFAOYSA-N nitromethane Chemical compound C[N+]([O-])=O LYGJENNIWJXYER-UHFFFAOYSA-N 0.000 description 1
- 229910021470 non-graphitizable carbon Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229920001197 polyacetylene Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 239000001008 quinone-imine dye Substances 0.000 description 1
- 239000004627 regenerated cellulose Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- 229920005608 sulfonated EPDM Polymers 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 1
- 239000006234 thermal black Substances 0.000 description 1
- LLZRNZOLAXHGLL-UHFFFAOYSA-J titanic acid Chemical compound O[Ti](O)(O)O LLZRNZOLAXHGLL-UHFFFAOYSA-J 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical group 0.000 description 1
- BDZBKCUKTQZUTL-UHFFFAOYSA-N triethyl phosphite Chemical compound CCOP(OCC)OCC BDZBKCUKTQZUTL-UHFFFAOYSA-N 0.000 description 1
- BHZCMUVGYXEBMY-UHFFFAOYSA-N trilithium;azanide Chemical compound [Li+].[Li+].[Li+].[NH2-] BHZCMUVGYXEBMY-UHFFFAOYSA-N 0.000 description 1
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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Abstract
Description
前記単位セルが、正極、負極及び分離膜を含むバイセル(bi−cells)を含んでおり、前記バイセルのうち少なくとも1つが、電極集電体の一面にのみ電極活物質が塗布された安全電極を含み、前記安全電極が、電極活物質が塗布されていない第1面及び電極活物質が塗布されている第2面を含み、前記安全電極を含むバイセルにおいて、安全電極の第1面及び/又は第2面には、前記安全電極を除いた残りの正極と負極との間又は負極と正極との間に介在するバイセルの分離膜の厚さ対比110%〜220%の厚さからなる安全分離膜が付加されていることを特徴とする。
100’ 第1バイセル
110 安全電極
110’ 安全電極
112 正極活物質層
114 金属集電体
116 安全分離膜
116’ 安全分離膜
120 分離膜
130 両面負極
140 分離膜
150 両面正極
151 正極活物質層
151a 正極活物質層
152 集電体
200 第2バイセル
200a A型バイセル
200c C型バイセル
200c’ 第2バイセル
202a 両面正極
202c 両面正極
203a 両面負極
203c 両面負極
204a 分離膜
204a’ 分離膜
204c 分離膜
300 電極組立体
310 分離フィルム
360 絶縁テープ
400 電極組立体
410 分離フィルム
501 第1バイセル
510 安全電極
511 集電体
512 正極活物質層
513 安全分離膜
520 分離膜
530 負極
540 分離膜
550 正極
590 針状導体
600 第1バイセル
600’ 第1バイセル
600a A型バイセル
600c C型バイセル
600c’ C型バイセル
610 安全電極
610’ 安全電極
616 安全分離膜
616’ 第1安全分離膜
618 安全分離膜
618’ 第2安全分離膜
630 両面負極
640 分離膜
650 両面正極
651 正極活物質層
651a 正極活物質層
652 集電体
700 電極組立体
710 分離フィルム
760 絶縁テープ
801 第1バイセル
810 安全電極
811 集電体
812 正極活物質層
820a 第1安全分離膜
820b 第2安全分離膜
830 両面負極
840 分離膜
850 両面正極
890 針状導体
900 第1バイセル
910 安全電極
912 正極活物質層
914 金属集電体
920 安全分離膜
930 両面負極
940 分離膜
950 両面正極
951 正極活物質層
951a 正極活物質層
952 集電体
1001 第1バイセル
1010 安全電極
1011 金属集電体
1020 安全分離膜
1030 両面負極
1040 分離膜
1050 両面正極
1090 針状導体
Claims (24)
- 2つ以上の単位セルが順次積層されているか、または長いシート状の分離フィルムによってフォールディングされている構造の電極組立体であって、
前記単位セルが、正極、負極及び分離膜を含むバイセルを含んでおり、前記バイセルのうち少なくとも1つが、電極集電体の一面にのみ電極活物質が塗布された安全電極を含み、前記安全電極が、電極活物質が塗布されていない第1面、及び電極活物質が塗布されている第2面を含み、前記安全電極を含むバイセルにおいて、安全電極の第1面及び/又は第2面には、前記安全電極を除いた残りの正極と負極との間又は負極と正極との間に介在するバイセルの分離膜の厚さ対比110%〜220%の厚さからなる安全分離膜が付加されていることを特徴とする、電極組立体。 - 前記バイセルが、電極組立体の最外郭に配置される第1バイセル、及び電極組立体の最外郭を除いた残りの部分に配置される第2バイセル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バイセルが、安全分離膜、安全電極、分離膜、両面電極、分離膜及び両面電極が順に積層された構造であることを特徴とする、請求項2に記載の電極組立体。
- 前記第1バイセルが、安全分離膜、安全電極、安全分離膜、両面電極、分離膜及び両面電極が順に積層された構造であることを特徴とする、請求項2に記載の電極組立体。
- 前記第1バイセルが、安全電極、安全分離膜、両面電極、分離膜及び両面電極が順に積層された構造であることを特徴とする、請求項2に記載の電極組立体。
- 前記第2バイセルが、第1バイセルと同一の構造、及び/又は両面電極、分離膜、両面電極、分離膜、及び両面電極が順に積層された構造であることを特徴とする、請求項2に記載の電極組立体。
- 前記両面電極が、集電体の両面に電極活物質が塗布されていることを特徴とする、請求項3〜6のいずれかに記載の電極組立体。
- 前記安全電極が、電極組立体の最外郭に位置する電極であることを特徴とする、請求項1に記載の電極組立体。
- 前記分離膜及び安全分離膜が、有/無機複合多孔性のSRS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。
- 前記分離膜が10μm〜14μmの厚さからな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2面に付加される安全分離膜が15μm〜30μmの厚さからな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2面に付加される安全分離膜の厚さが20μmであることを特徴とする、請求項11に記載の電極組立体。
- 前記第1面に付加される安全分離膜が、第2面に付加される安全分離膜の厚さに対して80〜95%の厚さを有す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9に記載の電極組立体。
- 前記分離膜基材と活性層が9:1〜1:9の厚さ比を有することを特徴とする、請求項14に記載の電極組立体。
- 前記厚さ比が5:5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択された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(Mg3Nb2/3)O3−PbTiO3(PMN−PT)及びハフニア(HfO2)からなる群から選択された1種以上であることを特徴とする、請求項17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(LixSiySz、0<x<3、0<y<2、0<z<4)系ガラス、及びP2S5(LixPySz、0<x<3、0<y<3、0<z<7)系ガラスからなる群から選択された1種以上であることを特徴とする、請求項17に記載の電極組立体。
- 請求項1に記載の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また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に記載の二次電池を単位電池として含む、電池パック。
- 請求項22に記載の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択されることを特徴とする、請求項23に記載のデバイス。
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