TWI284142B - Polymeric composite binder for electrodes and the usage thereof - Google Patents
Polymeric composite binder for electrodes and the usage thereof Download PDFInfo
- Publication number
- TWI284142B TWI284142B TW93115634A TW93115634A TWI284142B TW I284142 B TWI284142 B TW I284142B TW 93115634 A TW93115634 A TW 93115634A TW 93115634 A TW93115634 A TW 93115634A TW I284142 B TWI284142 B TW I284142B
- Authority
- TW
- Taiwan
- Prior art keywords
- dispersant
- monomer
- binder
- acid
- electrode
- Prior art date
Links
- 239000011230 binding agent Substances 0.000 title claims abstract description 46
- 239000002131 composite material Substances 0.000 title claims abstract description 30
- 239000002270 dispersing agent Substances 0.000 claims abstract description 61
- 229920000642 polymer Polymers 0.000 claims abstract description 38
- 239000011267 electrode slurry Substances 0.000 claims abstract description 10
- 239000000178 monomer Substances 0.000 claims description 37
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 32
- -1 Q-methyl styrene Chemical compound 0.000 claims description 31
- 229920005596 polymer binder Polymers 0.000 claims description 24
- 239000002491 polymer binding agent Substances 0.000 claims description 24
- 238000006116 polymerization reaction Methods 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 15
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- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 9
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 8
- 239000002003 electrode paste Substances 0.000 claims description 8
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- 239000007772 electrode material Substances 0.000 claims description 6
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- APNRTAXPTOJKPQ-UHFFFAOYSA-N butane-1,4-diol;prop-1-ene Chemical compound CC=C.CC=C.OCCCCO APNRTAXPTOJKPQ-UHFFFAOYSA-N 0.000 description 1
- QDHFHIQKOVNCNC-UHFFFAOYSA-N butane-1-sulfonic acid Chemical compound CCCCS(O)(=O)=O QDHFHIQKOVNCNC-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
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- 239000011280 coal tar Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- FWLDHHJLVGRRHD-UHFFFAOYSA-N decyl prop-2-enoate Chemical compound CCCCCCCCCCOC(=O)C=C FWLDHHJLVGRRHD-UHFFFAOYSA-N 0.000 description 1
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- NHOGGUYTANYCGQ-UHFFFAOYSA-N ethenoxybenzene Chemical class C=COC1=CC=CC=C1 NHOGGUYTANYCGQ-UHFFFAOYSA-N 0.000 description 1
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 description 1
- 239000001761 ethyl methyl cellulose Substances 0.000 description 1
- 235000010944 ethyl methyl cellulose Nutrition 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000005660 hydrophilic surface Effects 0.000 description 1
- 230000005661 hydrophobic surface Effects 0.000 description 1
- 229920003063 hydroxymethyl cellulose Polymers 0.000 description 1
- 229940031574 hydroxymethyl cellulose Drugs 0.000 description 1
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 1
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 125000001972 isopentyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 description 1
- 229910001486 lithium perchlorate Inorganic materials 0.000 description 1
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 description 1
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 239000002931 mesocarbon microbead Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 125000001434 methanylylidene group Chemical group [H]C#[*] 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- UCMSRHPIFRZHDO-UHFFFAOYSA-N penta-1,3-diene Chemical compound CC=CC=C.CC=CC=C UCMSRHPIFRZHDO-UHFFFAOYSA-N 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 125000000951 phenoxy group Chemical group [H]C1=C([H])C([H])=C(O*)C([H])=C1[H] 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920001197 polyacetylene Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000012985 polymerization agent Substances 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 229920000128 polypyrrole Polymers 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 description 1
- HABFEYSBOHCYQC-UHFFFAOYSA-N propane-1,2-diol;prop-1-ene Chemical compound CC=C.CC(O)CO.CC(O)CO HABFEYSBOHCYQC-UHFFFAOYSA-N 0.000 description 1
- FOWDZVNRQHPXDO-UHFFFAOYSA-N propyl hydrogen carbonate Chemical compound CCCOC(O)=O FOWDZVNRQHPXDO-UHFFFAOYSA-N 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007717 redox polymerization reaction Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- BTURAGWYSMTVOW-UHFFFAOYSA-M sodium dodecanoate Chemical compound [Na+].CCCCCCCCCCCC([O-])=O BTURAGWYSMTVOW-UHFFFAOYSA-M 0.000 description 1
- 229940082004 sodium laurate Drugs 0.000 description 1
- XDFGPVSVSMWVQE-UHFFFAOYSA-M sodium;dodecanoic acid;hydrogen sulfate Chemical compound [Na+].OS([O-])(=O)=O.CCCCCCCCCCCC(O)=O XDFGPVSVSMWVQE-UHFFFAOYSA-M 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 210000003802 sputum Anatomy 0.000 description 1
- 208000024794 sputum Diseases 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- BGKZULDOBMANRY-UHFFFAOYSA-N sulfanyl prop-2-enoate Chemical compound SOC(=O)C=C BGKZULDOBMANRY-UHFFFAOYSA-N 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- UWHCKJMYHZGTIT-UHFFFAOYSA-N tetraethylene glycol Chemical compound OCCOCCOCCOCCO UWHCKJMYHZGTIT-UHFFFAOYSA-N 0.000 description 1
- UIERETOOQGIECD-ONEGZZNKSA-N tiglic acid Chemical compound C\C=C(/C)C(O)=O UIERETOOQGIECD-ONEGZZNKSA-N 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
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- C08J5/20—Manufacture of shaped structures of ion-exchange resins
- C08J5/22—Films, membranes or diaphragms
- C08J5/2206—Films, membranes or diaphragms based on organic and/or inorganic macromolecular compounds
- C08J5/2218—Synthetic macromolecular compounds
- C08J5/2231—Synthetic macromolecular compounds based on macromolecular compounds obtained by reactions involving unsaturated carbon-to-carbon bonds
- C08J5/2243—Synthetic macromolecular compounds based on macromolecular compounds obtained by reactions involving unsaturated carbon-to-carbon bonds obtained by introduction of active groups capable of ion-exchange into compounds of the type C08J5/2231
- C08J5/225—Synthetic macromolecular compounds based on macromolecular compounds obtained by reactions involving unsaturated carbon-to-carbon bonds obtained by introduction of active groups capable of ion-exchange into compounds of the type C08J5/2231 containing fluorine
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M4/04—Processes of manufacture in general
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
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- C08J2327/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
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- 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
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Description
1284142 九、發明說明: 【發明所屬之技術領域】 本發明係關於一種適用於電極之複合聚合物黏結 ‘辦,其包括黏結劑聚合物以及化學結合於該黏結劑聚合= 5 表面之分散劑。 ° 【先前技術】 10 15 近年來,對於減少攜帶式電器產品尺寸大小與重量之 研究一直有持續穩定地發展,例如:攜帶式電腦,攜帶式 電話與攝錄影機等等。另外,作為攜帶式電器產品;源: 二次::逐漸傾向高電容、迷你化'輕量化及超薄型之需 求。隨著二次鋰離子電池的研究與發展,由於二次鋰離= 電池具有高電壓、長壽命、高能量密度之優點,所以在二 次電池種類中,二次_子電池已可達產品化與銷售。 二:人鐘離子電池—般由正極,負極,隔離κ以及電每 溶液所構成。這類電池其結構為正極_電解液儒膜-電阁 液-負極’其電池之特性於充電過程中,鐘離子由正極移鸯 至負極,並嵌人負極,於放電過程時,鐘離子由負極移鸯 至正極。 ^ 每個電極(正極與負極)係包含電子收集板與電極 層’牝電極膜層可含括電極活性物質,導電體,以及 黏結劑。雖然最終決定電極性質之因素為電極活性材^ 但是,電極活性材料附著力,和將電極膜層穩固於電 收集器表面的電極黏結劑,也同樣扮演重要之角色。 20 1284142 舉例而言,電極的製備方法是 電體,以及電極黏結劑均勺八埒” 陸材料,導 料,接著於電子收华;H於劑之中以形成電極聚 5 10 果板塗覆上電極漿料。在此例中,雷搞 哿料之分散性與塗覆性將佔有重大影響。 典型電極黏結劑之材料為聚偏二氯乙烯(pvd =機^為溶液,例如μ基__(nmp)h、聚 偏一氣乙烯(P卿)黏結劑因使用有機溶跡甲基石比嗔貌 酮(NMP),造成環境污染問題,並且高電容量二次電池= 射卿黏結劑之使用量有增加之缺點。基於以上理由,微 置使用時,㈣有充分附著力的水性黏結劑,《目前研究 之方向。 然而’至今仍無研究報告是關於具有調整電極漿料 的擴散性與塗層性之水性黏結劑。 15 【發明内容】 本發明依據實驗研究結果為主,若一分散劑置入於超 過50%單體轉換至複合聚合物之生成黏結劑聚合物之聚合 反應過程中,其分散劑可化學結合於黏結劑聚合物之表 面’可將電極㈣之分散性與塗覆性提升至最佳化,並增 20加電池容量,以及提升電池循環性能。 、本發明之主要目的係在提供一種具有良好分散性與 塗覆性的電極用複合聚合物黏結劑。 1284142 个赏啊之另一目的係在提供一 結劑。 +知乃之稷合聚合物黏 ^本^明之另一目的係利用μ、+、、 種二次鋰離子電池 4活性材料漿料’提供- 之附著力。此電極對於電子收集器有良好 池容=月二:目的係利用上述電極,提供-種優良電 今里,、循%性旎之二次鋰離子電池。 為達成上述目的,本發明# ίο 15 八物對姓制#3係在棱供一種電極用複合聚 二];:二 黏結劑之聚合物’與化學結合於該黏 結劑聚合物表面之分散劑。 、X月之電極用複合聚合物黏結劑,其特徵在於分散 诏疋以化學鍵結,較佳為共價鍵結於聚合物黏結劑上。 —士雖然力政劑可加人於製備黏結劑聚合物過程中之任 ,間’但其分散劑最佳加人時間條件為聚合反應至少達 50/。主要目的可達其分散劑影響活性材料漿料塗覆性之 最佳化。 、本發明的特徵在於當單體轉換至複合聚合物達到至 ^ 50%#壬度時’此時加入分散劑,可增加黏結劑之表面積, 20並且其黏結劑對於電池附著需求之使用可達最小量。 本發明之分散劑包括水溶性單罈,或其聚合物,並且 i將黏結劑聚合物之厭水性表面轉換至親水性表面,以致 於該黏結劑之聚合物可更穩定均勻地散佈於水媒介物中。 7 1284142 不同於其他簡單物理吸附於黏結劑聚合物表面之分 散劑,本發明複合聚合物黏結劑顆粒可由分散劑化學結合 於黏結劑聚合物所組成,即使在活性材料漿料製程之外界 Λ 強、力下(例如:攪拌),仍可保持分散劑對於黏結劑聚合物 5 之強結合力。因此,本發明之黏結劑顆粒,其在活性材料 漿料中,可表現均勻的分散性,於電子收集器有一良好的 塗覆性,以及均勻附著於電極表面,正面地促成電池容量 之增加,並且提升電池循環性能。 例舉適用於本發明生成黏結劑聚合物之單體單元,可 10 包括芳香族之乙烯基單體(例··苯乙烯(styrene)、α-甲基苯 乙烯(a -methylstyrene)、召-甲基苯乙稀(召 -methylstyrene)、以及二乙稀苯(divinylstyrene)等);共輛之 乙烯單體(例:1,3- 丁二烯(l,3-butadiene)、異戊二烯 (isoprene) 、 2,3-雙曱基-1,3- 丁二烯(2,3- 15 dimethyl-l,3_butadiene)、以及 1,3-戊二烯(l,3-pentadiene) 等);(曱基)丙烯酸酯單體(例:曱基丙烯酸曱酯 (methyl(meth)acrylate) (ethyl (me th) acrylate) 、 (propyl (meth) acrylate) 、 20 (isopropyl (meth)acrylate) (n-butyl(meth)acrylate) (isobutyl (meth) acrylate) (n-amyl (meth)acrylate) (iso amyl (meth) acrylate)
甲 基 丙 稀 酸 乙 酯 曱 基 丙 稀 酸 丙 酯 曱 基 丙 稀 酸 異 丙 酯 曱 基 丙 稀 酸 正 丁 酯 曱 基 丙 烯 酸 異 丁 酯 甲 基 丙 稀 酸 正 戊 酯 曱 基 丙 烯 酸 異 戊 酯 曱 基 丙 稀 酸 正 己 酯 8 1284142 _ 睛 (n-hexyl(meth)acrylate)、甲基丙烯酸 2-乙基已 (2-ethylhexyl(meth)acrylate)、或曱基丙烯酸輕乙 (hydroxyethyl(meth)acrylate)、以及甲基丙烯酉楚月桂 (kuryl(meth)acrylate)等);睛單體(例:丙歸 (acrylonitrile)、以及甲基丙稀睛(methacrylonitrile)等)·以及^ 未飽和之叛酸單體(例··丙烯酸(acrylic acid)、甲基兩稀萨 (methacrylic acid)、衣康酸(itaconic acid)、反丁 歸 _ ^ 一'酉曼 (fumaric acid)、擰康酸(citraconic acid)、甲其电 &環酸 ίο (methaconic acid)、麵康酸(glutarconic acid)、巴至酉处 (crotonic acid)、以及異巴豆酸(isocrotonic acid)等)。每 該此類單體生成之單一聚合反應,或兩種以及兩種以上_ 此類單體之共聚合反應,皆可製備黏結劑之聚合物。I% 共聚合反應,可採用二至十五種單體進行反應。 此外,分子量調整劑例如特十二燒;^ 15 (t-dodecylmercaptane) 、 正十二 烧硫醇 (n-dodecylmercaptane) 、 或正八 烧 硫 醇 (n-octylmercaptane),和交聯劑例如1,3-丁二醇二丙稀酸酉旨 (l,3-butanediol diacrylate)、1,3-丁二醇二甲基丙烯酸酉旨 (1,3- butanediol dimethacrylate)、1,4_丁二醇二丙稀酸醋 20 (l,4-butanediol diacrylate )、1,4-丁 二醇二曱基丙稀酸酯 (1,4_ butanediol dimethacrylate、苯基丙烯酸酯(aryl acrylate )、苯基曱基丙稀酸酯(aryl methacrylate)、三曱基 丙稀酸三曱基丙稀酉旨(trimethylpropane triacrylate)、四乙二 醇二丙稀酸醋(tetraethyleneglycol diacrylate)、四乙二醇二 1284142 甲基丙烯酸酉旨(tetraethyleneglycol dimethacrylate)、或苯二 乙烯(divinylbenzene),可作為聚合反應之添加劑。 任何造成交聯(crosslinking)反應之化合物,皆可作為 ·, 聚;合反應起始劑。在此聚合反應起始劑之具體例子包括過 5 硫酸銨(ammonium persulfate)、過硫酸鉀(potassium persulfate)、過氧化苯(benzoyl peroxide)、偶氮雙丁睛 (azobisbutyronitrile) 、 丁基過氧化氫(butyl hydroperoxide)、以及過氧化氫異丙苯(cumene hydroperoxide)。其中,較佳者為水溶性或氧化還原之聚合 10 反應起始劑。. 本實驗使用之分散劑,係選自以下構成之羣組: (1) 一烷氫聚環氧烷類曱基丙烯酸酯(第一種分散 劑),由下列式(1)所示; η
I CH2 = C - COO - {R2〇)D_R3,式⑴ 15 其中R1係一氫原子或甲基;R20係一至四個碳原子之環氧烧 類,或兩個,或更多之環氧烧類混合之混合物,且若該r2〇 為混合物,則該R20係由隨機或交互隔開方式加入;R3係一 至四個碳原子之烷基;以及η係一個1-50之整數; (2) —甲基丙烯酸衍生之單體(第二種分散劑),由下 20列式(2)所示; R4
I ,式(2) CH2 = C - coo - Μ1 1284142 其中R4係一氫原子或甲基;Μ1係氫,單價金屬,雙價金屬, 銨或有機胺; (3) —具活性之介面活性劑(第三種分散劑),由下 > 式〆3 )所示; R5 5 CH = CH R6〇 —(吻m - (S03>r - 式 (3 ) /、中R係纟原子或甲基;一至四個碳原子之烷 烯:苯,或一至四個碳原子之燒苯;R7〇係一至四個碳原子 ^環氧烷類,或兩個’或更多之環氧烷類混合之混合物, 若該WO為混合物,該心係由隨機或交互隔開方式加入.m2 1〇係—氣原子,單價金屬,雙價金屬,銨或有機胺h係一 個10-50之整數;以及『係^或丨。 —(4)一共聚合體(第四種分散劑),其包含50 —9〇 wt%之 第一種分散劑單體,5一45 wt〇/〇之第二種分散劑單體,以及 0·5-40 wt%之第三種分散劑單體; 15 — (5) 一多叛酸單體(第五種分散劑),由下列式(4)所 不。此外,上述分散劑可獨自或兩種至五種之混合使用。 R8 ! CH2 = C〜c〇~(〇R9CO)t- OH,式⑷ "中R係A原子或甲基;R9係__至四個碳原子之環烧 烯,以及ΐ係一個1-10之整數。 20氧如式⑴所述之單體,可包括甲基丙稀酸曱氧基聚環 乙烧 酉曰 (methoxypolyethylene oxide 11 1284142 (meth)acrylate)、曱基丙稀酸甲氧基聚環氧丙烧酯 (methoxypolypropylene oxide (meth)acrylate)、曱基丙 稀酸曱氧基聚環氧丁烧S旨(methoxypolybutyleneoxide (ijieth)acry late);甲基丙烯酸曱氧基聚環氧乙烧聚環氧 Λ 5 丙烧酯(methoxypolyethyleneoxide polypropy leneoxide (meth)acry late)、曱基丙稀酸甲氧基聚環氧乙烧聚環氧丁 烧酯(methoxypolyethyleneoxide polybutyleneoxide (meth)aery late)、甲基丙烯酸曱氧基聚環氧丙烧聚環氧丁 烧酯(methoxypolypropyleneoxide polybutyleneoxide 10 (meth)acry l^te);曱基丙烯酸曱氧基聚環氧乙烧聚環氧 丙烧聚環氧 丁院醋(methoxypolyethyleneoxide polypropyleneoxide polybutyleneoxide (meth)acrylate);曱基丙稀酸乙氧基聚環氧乙烧酯 (ethoxypolyethylene oxide (meth)acrylate);曱基丙稀 15 酸乙氧基聚環氧丙烧酯(ethoxypolypropylene oxide (meth)acrylate);曱基丙烯酸乙氧基聚環氧丁烧醋 (ethoxypolybutylene oxide (meth)acrylate);曱基丙烯 酸乙氧基聚環氧乙烷聚環氧丙烷酯 (ethoxypolyethyleneoxide polypropyleneoxide 20 (me th) aery late)、曱基丙稀酸乙氧基聚環氧乙烧聚環氧丁 烧 酉旨(ethoxypolyethy1eneoxide polybutyleneoxide (meth)acry late);曱基丙稀酸乙氧基聚環氧丙烧聚環氧丁 烧酉旨(ethoxypolypropyleneoxide polybutyleneoxide (meth) aery late),以及曱基丙稀酸乙氧基聚環氧乙烧聚環 12 1284142 氧丙烧聚環氧丁烧酯(ethoxypolyethyleneoxide polypropyleneoxide polybutyleneoxide (me th) aery late)。每種單體可獨自,或兩種以及兩種以上 、馬合使用。 5 如式(2)所述之單體,可包括丙浠酸(aery 1 ic acid)、 甲基丙烯酸(methacry 1 ic acid)、單價金屬鹽類、二價金 屬鹽類、銨鹽、以及有機胺酸鹽。每種單體可獨自,或兩 種以及兩種以上混合使用。 如式(3)所述之介面活性劑,可包括磺氧聚環氧烷烯 10 丙醚(sul foxypolya Iky leneoxide al lyethers),例如磺氧 聚環氧乙烧稀丙醚(sulfoxypolyethyleneoxide al lyethers)、 績氧聚環氧丙烧稀丙醚 (sulfoxypolypropyleneoxide allyethers)、石黃氧聚環氧 丁烧稀丙醚(sulfoxypolybutyleneoxide a 1 lyethers)、石黃 15 氧聚環氧乙烧二-丁稀醚(sulfoxypolyethyleneoxide 2-butenylether)、石黃氧聚環氧丙烧二-丁烯醚 (sulfoxypolypropyleneoxide 2-butenylether)、石黃氧聚 環氧丁烧二-丁稀鱗(sulfoxypolybutyleneoxide 2- butenylether)、磺氧聚環氧乙烷三-丁烯醚 20 (sulfoxypolyethyleneoxide 3-butenylether)、磺氧聚環 氧丙烧三-丁稀 _ (sulfoxypolypropyleneoxide •㈣ 3- butenylether)、磺氧聚環氧丁烷三-丁烯醚 (sulfoxypolybutyleneoxide 3-butenylether)、磺氧聚環 氧乙烧三-戊稀鱗(sulfoxypolyethyleneoxide 13 1284142 3-pentenylether)、石黃氧聚環氧丙烧三-戊稀 (sul foxy poly propyl eneox i de 3-pentenyl ether)、以及石黃 氧聚環氧 t 烧三-戊烯醚(3111{〇乂70〇171)1^716116€^(16 ,3^penteny lether);續氧聚環氧烧烧基燁基苯基鱗 5 (sulfoxypolyaIky1eneoxide alky 1 vinyl phenyl ethers),例如石黃氧聚環氧乙烧(三-乙稀 -五-乙烧)笨基 St (sulfoxypolyethyleneoxide (3 - vinyl-5-ethyl)phenylether)、續氧聚環氧丙烧(三-乙稀-五-乙院)苯基醚(sulfoxypolypropyleneoxide 10 (3-vinyl-5-.ethyl) phenylether )、石黃氧聚環氧丁烧(三- 乙稀-五-乙烧)苯基驗(sulfoxypolybutyleneoxide (3-vinyl-5-e thy 1) phenyl ether )、石黃氧聚環氧丙烧(三-丙稀-五-丙烧)苯基醚(sulfoxypolypropyleneoxide (3-propenyl-5-propyl) phenylether )、石黃氧聚環氧丁烧 15 (三-丙烯-五-丙烧)苯基醚(sul foxy poly butyl eneox.ide (3-propenyl -5-propyl) phenyl ether )、磺氧聚環氧乙烧 (三-丙烯-五-丁烧)苯基醚(sulfoxypolyethyleneoxide (3-propeny 1-5-butyl) phenyl ether)、石黃氧聚環氧丙烧 (三-丙稀-五-丁 烧) 苯基鍵 2〇 (sulfoxypolypropyleneoxide (3-propeny1-5-butyl) phenyl ether)、以及績氧聚環氧丁烧(三-丙稀-五-丁烧) 苯基鱗 (sulfoxypolybutyleneoxide (3-propeny 1-5-butyl) phenylether);二-石黃氧聚環氧 烧-三-(四-烧基苯氧)丙稀醚 14 1284142 (2-sulfoxypolyaIkyleneoxide-3-(4-alkylphenoxy)prop ylene allylethers),例如二-石黃氧聚環氧乙烧-三-(四-甲 基 苯丨 氧 ) 丙烯醚 > (:'2-sul foxypolyethyl eneoxide-3-(4-methyl phenoxy) 5 propy leneal ly lether)、二-石黃氧聚環氧丙烧-三-(四-甲基 苯氧) 丙烯醚 (2-sulfoxypolypropyleneoxide-3-(4-methylphenoxy) propyl enea 1 lyl ether)、二-石黃氧聚環氧丁烧-三-(四-甲基 苯氧)丙烯醚(2-3111{〇又7口〇1713111716116〇叉1〇16-3-(4-11161:1171 10 phenoxy) propyleneal lylether)、二-績氧聚環氧乙烧-三-(四- 乙基苯 氧 )丙稀醚 (2-sulfoxypolyethyleneoxide-3-(4-ethylphenoxy) propylene al lylether)、二-磺氧聚環氧丙烷-三-(四-乙基苯氧)丙稀醚(2-sulfoxypolypropyleneoxide-15 3_(4-ethy lphenoxy)propyleneal lylether)、二-石黃氧聚環 氧丁烧-三-(四-乙基苯氧)丙烯醚 (2-sulfoxypolybutyleneoxide- 3-(4-ethy lphenoxy)propy lene al ly lether);以及單價金 屬鹽類,二價金屬鹽類,銨鹽,或有機胺酸鹽。每種單體 20 可獨自,或兩種以及兩種以上混合使用。 如式(4)所述之單體,可包括甲基丙烯酸聚羧乙酸酯 (polycarboxyethy 1 (meth)acrylate)、甲基丙稀酸聚魏曱 酸酉旨(polycarboxymethy 1 (meth)acrylate)、以及曱基丙 15 1284142 烯酸聚羧丁酸醋(polycarboxybuty丨(meth)acrylate),每 種單體可獨自’或兩種以及兩種以上混合使用。 上式所述作為分散劑之單體,係包含水溶性官能基。 、 气此,本發明之黏結劑聚合物表面之分散劑,可促進聚合 5反應之穩定性,與黏結劑聚合物之儲存穩定性,並且於製 備活性材料漿料之過程中,使黏結劑均勻分散於活性材料 漿料中,因而使活性材料之間具有均勻之附著性,還可在 電極構成上,促使活性材料與電子收集板之間有一良好附 著力與均勻性。 10 此外,本發明之分散劑,佔複合聚合物黏結劑之 〇· 01-30 wt%總固量。若分散劑之成分小於〇· 〇1 wt%,該黏 t劑之性質會惡化,若分散劑之成分大於3〇 ,該黏釺 劑將回復其乳膠穩定性。 < 若黏結劑聚合反應進行一半後(當聚合反應轉換至少 15超過50%時),再將分散劑單體加入反應中,其分散劑於黏 結劑顆粒表面之含量將會增加。本方法可提升黏結劑乳化 之穩定性與電極漿料之分散性,且黏結劑可達有效均勻之 分散性,於已製備電極之活性材料中。 若分散劑加入於聚合反應轉換未達5〇%時,其分散 20,被埋沒於黏結劑顆㈣,#法保有分散劑之功能。若= ^劑於聚合反應完畢後加人,其分散劑與黏結劑顆粒為簡 早物理混合,將導致其分散劑無法促使黏結劑乳化之穩〜 性與電極漿料之分散性。 ^疋 16 1284142 本發明之複合聚合物黏 物,以及經由乳化聚合反應製二散:3。黏結劑之聚合 5 10 15 20 ::本發明結果,此複合聚合物黏結劑係 J反=備!成’分散劑可扮演以水為媒介物之水相黏: 劑。因此,本發明藉由使用以水為分散媒介之聚合物點: 贈有機關料分散媒介之pvdf,可增加黏^ 刎聚&物之附者力,以及使製程更為環保。 此外,更發現不僅只有製程電極漿料過程之分散性, 包括漿料塗覆於電子收集版之塗覆性也相t出色,並且對 於電池容量與二次輯子電池之循環性能,甚至包含電極 之製備皆有提升。 本發明之二次電池包含正極,負極,以及電解溶液, 其中該正負電極係依據本發明之(1)電極活性材料〇複合 聚合物黏結劑所組成。 電極活性材料為取決電池容量之重要材料,例舉正極 之活性材料,包括導電聚合物,例如聚呦咯 (polypyrrole)、聚苯胺(polyaniHne)、聚乙炔 (polyacetylene)、以及聚塞吩(p〇iythi〇phene);金屬氧 化物’例如 TiS2、TiSs、Cu2V2〇3、無結晶相 v2〇-p2〇5、v6〇13、 始酸鐘(lithium cobalt oxide)、鎳酸鋰(nickei cobalt oxide)、以及鎂酸鋰(lithium mangnese oxide);複合金屬 氧化物,以及導電聚合物。此外,例舉負極活性材料,包 括碳膏材料,例如天然石墨、人造石墨、MPCF、MCMB、PIC、 17 1284142 酚樹脂塑料、PAN碳纖維、以及石墨;導電聚合物,例如聚 並苯(polyacene);以及鋰金屬,例如链、與鐘合金。 除活性材料之外,如有必要,電極漿料可含括導電 v 劑,黏度調整劑,輔助黏結劑等。 5 例舉黏度調整劑,可包括水溶性聚合物,例如羧甲基
纖維素(carboxylmethyl cellulose)、魏乙基纖維素 (carboxylethy1 cellulose) 經曱基纖維素 (hydroxymethyl cellulose)、經丙基纖維素 (hydroxypropylcellulose)、魏曱基乙基纖維素 10 (carboxy1 ethylmethyl cellulose)、聚環氧乙烧. (polyethylene oxide)、以及乙二醇(ethyleneglycol)。
作為一導電劑之電子導電材料不會在電池使用時,造 成化學變化。具體之電子導電材料例子,包括天然石墨, 例如層狀石墨、鱗狀石墨、以及粗糙之石墨;導電纖維,例 15 如石油焦炭、纖維素、糖、中間相瀝青(meso-phkse pitch)、人造石墨(例如:石墨、如乙炔黑(acetylene black)以及channel black之複黑、瀝青、煤焦油、活性碳 等),以及金屬纖維。 電解溶液包括支持之電解質(例如:LiPF6、LiCl〇4、 20 LiBF4、LiN(S〇2CF3)2等),以及由一混合高介電溶劑(例如·· 碳酸乙酉旨(ethyl carbonate)、碳酸丙酉旨(propyl carbonate)、碳酸甲乙酯(ethylmethy 1 carbonate)、碳酸 二甲酯(dimethyl carbonate)、碳酸二乙酯(diethyl carbonate)等)製備之混合溶劑。 18 1284142 如上所述,本發明在生成黏結劑聚合物之聚合反應進 行超過一半時,加入分散劑,可提升黏結劑乳膠之穩定性。 此外’本發明達到電極漿料之分散性、塗覆性、與附著力 ,$改善。對於二次電池之電容有明顯的增加,並且提供一 5種充/放電循環過程中電容低耗損之二次鋰離子電池、 【實施方式】 本赉明可藉下述之本貫施例以及比較實施例中,進行 更詳細的描述,且可明顯地由熟習本項技藝者瞭解本發明 10 範圍,並非只限定於下述實施例。 例一 複合聚合體點結劑之合成 取93·0 g離子交換水置入一反應槽内,並且升溫至75 °C。當離子交換反應槽之溫度達75 °C時,分別加入5·8 g 15丙烯酸丁酯,4.3 g苯乙烯,以及〇·ΐ g硫酸月桂酸鈉。此時 維持反應槽之溫度於75 °C下,並加入含〇·08 g硫酸鈉之5.〇 g離子交換水於反應槽中,以此作為一反應源。 將93.0 g離子交換水,30.0 g苯乙烯,6〇1 §丙烯酸丁 酯’ 0.8 g甲基丙烯酸芳香酯,以及〇15 g硫酸月桂酸鈉之 20乳化混合物分配多份,於三小時内分別加入上述該反應 源,同時,於三小時内將含〇·21 g硫酸鈉之10.0 g離子交換 水分批加入反應槽内,即可完成聚合體之製備。聚合反應 完成前一小時,加入5.5 g丙醯酸乙氧基聚環氧乙烷酯,此 19 1284142 使分散劑與聚合物黏 時係乳化混合物加入第—種分散劑 結劑形成化學結合。 以氫氧化鉀將最饮夕取人, 、、、之聚合物調整至ρίί 7,即製借# ,極用之複合聚合體點結#1。 a傷成- 5 重極漿料 負極漿料係由94.0 β夭妒工窗 … 棘 g天w石墨,1.0 g乙炔黑之導電
而以如例!所述之2·4 g複合聚合體黏結劑,混合 =,並以2.5 g水溶性之幾甲基纖維素聚合物作為一增點 则曰,以水為一分散媒體,並且將混合物之總固量調整至 10 C%。 里π金主 、正極漿料係由94.0g麵酸鐘之活性材料,l〇g乙快黑 之導電體,、以及如例i所述之5〇 g複合聚合體黏結劑,混 合製備而成,並且將混合物之總固量調整至45%。 分散性之評任 15 &評估已製備漿料之分散性,將該製備完成之漿料置
於電/;,L计’並且量測該漿料切變速率自〇· 1增加至丨,〇〇〇 之黏度變化。此時若黏度呈現一增加值,該黏度卻無連續 性回復現象,即證實漿料無充分地達到分散性。其起因係 為達漿料之均勻化而使用能量,在此,漿料之分散性依據 20黏度之增加與否,可作為Ο或X之判別。〇係表示黏度無增 加現象,可證實有良好分散性,X表示為黏度有增加產生, 係為低4之分散性。 璽極之掣藉 20 1284142 例5 如例1實施方式所述之複合聚合物黏結劑,除了例1之 分散劑取代成5·5 g聚叛乙基丙烯酸酯(第五種分散劑)。 、 符電極漿料、電極、以及二次鐘離子電池之評估與製備方 5 法可依循例1之實施方式。 例6至12 如例1實施方式所述之複合聚合物黏結劑,例6至例u 之實施方式可依循製備,除了例1之分散劑取代成表一所列 之分散劑。其電極聚料、電極、以及二次鐘離子電池之評 10 估與製備方沬可依循例1之實施方式。 表一 分散劑 一 例6 2.75 g丙烯酸乙氧基聚環氧乙烷酯 2 · 7 5 g丙稀酸 例7 2.75 g丙烯酸乙氧基聚環氧乙烷酯 2.75 g磺氧聚環氧乙烷(三-丙烯-五-丁烯基)苯基醚 例8 2·75 g丙烯酸乙氧基聚環氧乙烷酯 2.75 gCP-WB 例9 2.75 g丙烯酸乙氧基聚環氧乙烷酯 2.75 g聚羧乙基丙烯酸酯 例10 1.9 g丙烯酸乙氧基聚環氧乙烧酯 1.8 g丙烯酸 1.8 g磺氧聚環氧乙烷(三-丙烯-五-丁烯基)苯基醚 ·: 例11 1.4 g丙烯酸乙氧基聚環氧乙烧酯 1.4 g丙烯酸 1.4 g磺氧聚環氧乙烷(三-丙烯-五-丁烯基)苯基醚13 g 23 1284142 CP-WB 例12 1.1 g丙烯酸乙氧基聚環氧乙烷酯 1.1 g丙烯酸 1.1 g磺氧聚環氧乙烷(三-丙烯-五-丁烯基)苯基醚 1.1 gCP-WB 1.1 g聚羧乙基丙烯酸酯 如例1實施方式所述之複合聚合物黏結劑,除了例1之 分散劑增加至16·5。其電極漿料、電極、以及二次鋰離子 5 電池之評估與製備方法可依循例1之實施方式。 例1之比# 如例1實施方式所述之複合聚合物黏結劑,除了未加 入例1之分散劑。其電極漿料、電極、以及二次鋰離子電池 之評估與製備方法可依循例1之實施方式。 10 例2之比輕 如例1實施方式所述之複合聚合物黏結劑,除了聚合 反應完成前兩小時加入分散劑。其電極漿料、電極、以及 二次鋰離子電池之評估與製備方法可依循例丨之實施方式。 例3之比_ 15 如例3實施方式所述之複合聚合物黏結劑,除了聚合 反應70成後,再加入分散劑,使分散劑與黏結劑之聚合物 互相混合,而未有化學結合於黏結劑聚合物之表面。其電 極漿料、電極、以及二次鋰離子電池之評估與製備方法可 依循例1之實施方式。 20 例4之 24 1284142 如例4實施方式所述之複合聚合物黏結劑,除了聚合 反應完成後,再加入分散劑’使分散劑與黏結劑之聚合物 互相混合,而未有化學結合於黏結劑聚合物之表面。其電 Λ 辑:漿料、電極、以及二次鋰離子電池之評估與製備方法可 5 依循例1之實施方式。 結果計篡 針對樣品1-13與樣品比較1-4之電池性能、分散性、、, 覆性、與附著力評估結果,整理於以下表2。 盒 表2
25 1284142
【圖式簡單說明】
【主要元件符號說明】 10 無
26
Claims (1)
- —修(更)正本 十、申請專利範圍: I一種電極用之複合聚合物黏結劑,其包括: 黏結劑聚合物;以及 化本結合於該黏結劑聚合物表面之分散劑,其中該 政知丨係於生成黏結劑聚合物之聚合反應進行中,單體轉 換成黏結劑聚合物至少超過50%時,加入反應,且該分散 劑係複合聚合物黏結劑總固成分之〇 〇1-3〇 wt%。 2.如申請專利範圍第丨項所述之複合聚合物黏結劑,其 中该黏結劑聚合物係由包含芳香族之乙烯基單體,共軛之 10乙烯單體,(甲基)丙烯酸酯單體,睛單體及未飽和之羧酸 單體組成群組中至少選擇一單體所製備。 3 ·如申請專利範圍第2項所述之複合聚合物黏結劑, 其中3亥方香族之乙烯基單體係苯乙烯,Q -甲基苯乙烯,万 -曱基苯乙烯,或雙乙烯苯;該共軛之乙烯單體係丨,3-丁二 15烯,異戊二烯,2,3-雙曱基-1,3·丁二烯,或1,3-戊二烯;該 (曱基)丙烯酸酯單體係甲基丙烯酸甲酯,甲基丙烯酸乙 酯’曱基丙烯酸丙酯,曱基丙烯酸異丙酯,甲基丙稀酸正 丁酯,甲基丙烯酸異丁酯,甲基丙烯酸正戊g旨,甲基丙稀 酸異戊酯,甲基丙烯酸正己酯,曱基丙烯酸孓乙基己g旨, 20或甲基丙烯酸羥乙酯,曱基丙烯酸月桂酯;該睛單體係丙稀 睛或甲基丙烯睛;以及該未飽和之羧酸單體係丙烯酸,曱基 丙烯酸,衣康酸,反丁烯二酸,檸康酸,甲基康酸,麵康 酸,巴豆酸,或異巴豆酸。 27 1284142 4·如申請專利範圍第1項所述之複合聚合物黏結劑, 其中該分散劑係至少一種選自以下構成之羣組: (1) 一烧氫聚環氧烧類曱基丙烯酸酿(第一種分散 劑),由下列式(1)所示: R1 t 5 ,式⑴ 其中R1係一氫原子或曱基;r2〇係一至四個碳原子之環氣 烧類’或兩個,或更多之環氧烷類混合之混合物,且當該 R 0為混合物’則該r2〇係由隨機或交互隔開方式加入;汉3 係一至四個碳原子之烷基;以及η係一個1-50之整數; 10 (2)一曱基丙烯酸衍生之單體(第二種分散劑),由下列 式(2)所不· R4 CHg ϋοο _ Μ1,式(2) 其中R4係一氫原子或甲基;Μ1係氫,單價金屬,雙價金屬, 銨或有機胺; 15 (3) 一具活性之介面活性劑(第三種分散劑),由下列式 (3)所示: f OH = CH ’ Re〇 · (R7〇》m _(s〇3卜 ,式⑺ 其中R5係一氫原子或甲基;R6係一至四個碳原子之烷烯, 苯,或一至四個碳原子之烷苯;R7〇係一至四個碳原子之環 20氧烷類,或兩個,或更多之環氧烷類混合物,且當該尺7〇 28 1284142 為混合物,該R1 2〇係由隨機或父互隔開方式加入;Μ2係一氫 原子,單價金屬,雙價金屬’銨或有機胺基;m係一個1〇_5〇 之整數;以及r係0或1 ; (4) 一共聚合體(第四種分散劑),其包含5〇_9〇 wt%之 5第一種分散劑單體,5-45 wt%之第二種分散劑單體,以及 0·5_40 wt%之第三種分散劑單體; (5) —多羧酸單體(第五種分散劑),由下列式(4)所示: CH 2 = C * CO - (OR3〇〇)t * 〇H , ^ (4) 其中R係-氫原子或甲基;R3係一至四個碳原子:烷烯,以 10 及t係一個1-1〇之整數。 5.-種電極㈣,其係包括如中請專利範圍第丄項至 第4項所述任-項之複合聚合物黏結劑,以及—電極活性材 6. 如申請專利範圍第5項所 汀述之電極漿料,其係利用 15水為一分散媒介物。 29 1 . 一種電極,其係塗靂Λ :设如申請專利範圍第6項所述之 2 電極漿料於一電子收集板以製備。 3 8·—種二次電池,其係以 之電極製備而成。 ^月專利辄圍第7項所述
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KR20040104400A (ko) | 2004-12-10 |
US7695821B2 (en) | 2010-04-13 |
EP1629556A4 (en) | 2011-03-09 |
CN100418257C (zh) | 2008-09-10 |
CN1765025A (zh) | 2006-04-26 |
KR100644063B1 (ko) | 2006-11-10 |
EP1629556A1 (en) | 2006-03-01 |
JP2006519883A (ja) | 2006-08-31 |
EP1629556B1 (en) | 2015-07-08 |
JP4335215B2 (ja) | 2009-09-30 |
TW200502343A (en) | 2005-01-16 |
US20070055023A1 (en) | 2007-03-08 |
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