JP6824558B2 - 機能性バインダーが適用された電池用分離膜及びこれを適用した電気化学素子 - Google Patents
機能性バインダーが適用された電池用分離膜及びこれを適用した電気化学素子 Download PDFInfo
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- JP6824558B2 JP6824558B2 JP2019519709A JP2019519709A JP6824558B2 JP 6824558 B2 JP6824558 B2 JP 6824558B2 JP 2019519709 A JP2019519709 A JP 2019519709A JP 2019519709 A JP2019519709 A JP 2019519709A JP 6824558 B2 JP6824558 B2 JP 6824558B2
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 5
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- 229910018119 Li 3 PO 4 Inorganic materials 0.000 claims description 2
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- 229910000664 lithium aluminum titanium phosphates (LATP) Inorganic materials 0.000 claims description 2
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- YUEZNSHWNXXYJG-UHFFFAOYSA-N acetic acid;propanoic acid Chemical compound CC(O)=O.CC(O)=O.CCC(O)=O YUEZNSHWNXXYJG-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
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- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/446—Composite material consisting of a mixture of organic and inorganic materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
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- H—ELECTRICITY
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- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/10—Temperature sensitive devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Composite Materials (AREA)
- Cell Separators (AREA)
Description
Claims (10)
- (a)ポリオレフィン系基材、及び
(b)前記基材の表面及び前記基材に存在する気孔部の一部からなる群から選択された1種以上の領域が無機物粒子及びバインダーの混合物でコートされた活性層を含み、前記活性層はバインダーによって無機物粒子同士が連結及び固定され、無機物粒子間のインタースティシャル・ボリューム(interstitial volume)によって気孔構造が形成された電池用分離膜であって、
前記バインダーは各分子においてヒドロキシ基が占める比率が10重量%以上であり、
前記バインダーは、1)タンニン酸、ピロガロール、アミロース、アミロペクチン及びキサンタンガムの少なくとも1種以上と、2)ポリビニリデンフルオリド−ヘキサフルオロプロピレン(polyvinylidene fluoride−co−hexafluoropropylene)、ポリビニリデンフルオリド−トリクロロエチレン(polyvinylidene fluoride−co−trichloroethylene)、ポリメチルメタクリレート(polymethylmethacrylate)、ポリアクリロニトリル(polyacrylonitrile)、ポリビニルピロリドン(polyvinylpyrrolidone)、ポリビニルアセテート(polyvinyl acetate)、エチルビニルアセテート共重合体(polyethylene−co−vinyl acetate)、ポリエチレンオキシド(polyethylene oxide)、セルロースアセテート(cellulose acetate)、セルロースアセテートブチレート(cellulose acetate butyrate)、セルロースアセテートプロピオネート(cellulose acetate propionate)、シアノエチルプルラン(cyanoethylpullulan)、シアノエチルポリビニルアルコール(cyanoethylpolyvinylalcohol)、シアノエチルセルロース(cyanoethylcellulose)、シアノエチルスクロース(cyanoethylsucrose)、プルラン(pullulan)、カルボキシルメチルセルロース(carboxyl methyl cellulose)、アクリロニトリルスチレンブタジエン共重合体(acrylonitrilestyrene−butadiene copolymer)、ポリイミド(polyimide)、ポリビニリデンフルオリド−クロロトリフルオロエチレン共重合体(PVdF−CTFE)の少なくとも1種以上との混合物である、電池用分離膜。 - 前記バインダーは、タンニン酸、ピロガロール、アミロース、アミロペクチン及びキサンタンガムの少なくとも1種以上を含む、請求項1に記載の電池用分離膜。
- 前記無機物粒子は、比誘電率が5以上の無機物粒子、圧電性(piezoelectricity)を有する無機物粒子、及びリチウムイオン伝達能力を有する無機物粒子からなる群から選択された1種以上である、請求項1に記載の電池用分離膜。
- 前記比誘電率が5以上の無機物粒子は、SrTiO3、SnO2、CeO2、MgO、NiO、CaO、ZnO、ZrO2、Y2O3、Al2O3、TiO2又はSiCであり、
前記圧電性(piezoelectricity)を有する無機物粒子は、BaTiO3、Pb(Zr、Ti)O3(PZT)、Pb1−xLaxZr1−yTiyO3(PLZT)、PB(Mg3Nb2/3)O3−PbTiO3(PMN−PT)又はハフニア(HfO2)であり、
前記リチウムイオン伝達能力を有する無機物粒子は、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)、リチウムニトリド(LixNy、0<x<4、0<y<2)、SiS2(LixSiySz、0<x<3、0<y<2、0<z<4)系ガラス又はP2S5(LixPySz、0<x<3、0<y<3、0<z<7)系ガラスである、請求項3に記載の電池用分離膜。 - 前記無機物粒子は、Al2O3、AlOOH及びMg(OH)2の少なくとも1種を含む、請求項3に記載の電池用分離膜。
- 前記ポリオレフィン系基材は、高密度ポリエチレン、低密度ポリエチレン、直鎖状低密度ポリエチレン、超高分子量ポリエチレン及びポリプロピレンからなる群から選択された1種以上である、請求項1に記載の電池用分離膜。
- 1)バインダーを溶媒に溶解させてバインダー溶液を製造する段階、
2)無機物粒子を前記1)段階のバインダー溶液に添加及び混合する段階、及び
3)ポリオレフィン系基材の表面及び前記基材の気孔部の一部からなる群から選択された1種以上の領域を前記2)段階の溶液でコートしてから乾燥する段階を含む電池用分離膜の製造方法であって、
前記バインダーは、各分子においてヒドロキシ基が占める比率が10重量%以上である請求項1〜6のいずれか一項に記載の電池用分離膜の製造方法。 - 前記溶媒は、水とアセトンの混合重量比が50:50〜0:100である、請求項7に記載の電池用分離膜の製造方法。
- 請求項1〜6のいずれか一項に記載の電池用分離膜を含む、電気化学素子。
- 前記電気化学素子はリチウム二次電池である、請求項9に記載の電気化学素子。
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