JP6516076B1 - 電極合剤ペースト - Google Patents
電極合剤ペースト Download PDFInfo
- Publication number
- JP6516076B1 JP6516076B1 JP2018558360A JP2018558360A JP6516076B1 JP 6516076 B1 JP6516076 B1 JP 6516076B1 JP 2018558360 A JP2018558360 A JP 2018558360A JP 2018558360 A JP2018558360 A JP 2018558360A JP 6516076 B1 JP6516076 B1 JP 6516076B1
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- Prior art keywords
- electrode
- polyimide
- group
- electrode mixture
- mixture paste
- Prior art date
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- 239000000203 mixture Substances 0.000 title claims abstract description 59
- 239000011347 resin Substances 0.000 claims abstract description 82
- 229920005989 resin Polymers 0.000 claims abstract description 82
- 229920001721 polyimide Polymers 0.000 claims abstract description 75
- 239000002904 solvent Substances 0.000 claims abstract description 27
- 238000002844 melting Methods 0.000 claims abstract description 26
- 230000008018 melting Effects 0.000 claims abstract description 26
- 239000009719 polyimide resin Substances 0.000 claims abstract description 18
- 239000007772 electrode material Substances 0.000 claims abstract description 17
- 239000004642 Polyimide Substances 0.000 claims description 57
- 150000004985 diamines Chemical class 0.000 claims description 26
- 150000000000 tetracarboxylic acids Chemical class 0.000 claims description 24
- 150000003949 imides Chemical class 0.000 claims description 20
- -1 phenylethynyl group Chemical group 0.000 claims description 19
- 239000000126 substance Substances 0.000 claims description 19
- 239000007784 solid electrolyte Substances 0.000 claims description 17
- 238000007259 addition reaction Methods 0.000 claims description 11
- 125000003118 aryl group Chemical group 0.000 claims description 9
- 125000002947 alkylene group Chemical group 0.000 claims description 8
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 7
- 238000006116 polymerization reaction Methods 0.000 claims description 7
- 150000007824 aliphatic compounds Chemical class 0.000 claims description 5
- 239000012454 non-polar solvent Substances 0.000 claims description 5
- 239000011883 electrode binding agent Substances 0.000 claims 1
- 125000001183 hydrocarbyl group Chemical group 0.000 claims 1
- 239000011230 binding agent Substances 0.000 abstract description 73
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 25
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- 238000010438 heat treatment Methods 0.000 description 15
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- 238000012360 testing method Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 9
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- GTDPSWPPOUPBNX-UHFFFAOYSA-N ac1mqpva Chemical compound CC12C(=O)OC(=O)C1(C)C1(C)C2(C)C(=O)OC1=O GTDPSWPPOUPBNX-UHFFFAOYSA-N 0.000 description 8
- 125000003277 amino group Chemical group 0.000 description 8
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- 125000004018 acid anhydride group Chemical group 0.000 description 7
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 6
- 239000011889 copper foil Substances 0.000 description 6
- 229910001416 lithium ion Inorganic materials 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- HVVWZTWDBSEWIH-UHFFFAOYSA-N [2-(hydroxymethyl)-3-prop-2-enoyloxy-2-(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical compound C=CC(=O)OCC(CO)(COC(=O)C=C)COC(=O)C=C HVVWZTWDBSEWIH-UHFFFAOYSA-N 0.000 description 5
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- 230000000694 effects Effects 0.000 description 4
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- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 4
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- GTACSIONMHMRPD-UHFFFAOYSA-N 2-[4-[2-(benzenesulfonamido)ethylsulfanyl]-2,6-difluorophenoxy]acetamide Chemical compound C1=C(F)C(OCC(=O)N)=C(F)C=C1SCCNS(=O)(=O)C1=CC=CC=C1 GTACSIONMHMRPD-UHFFFAOYSA-N 0.000 description 3
- FYYYKXFEKMGYLZ-UHFFFAOYSA-N 4-(1,3-dioxo-2-benzofuran-5-yl)-2-benzofuran-1,3-dione Chemical compound C=1C=C2C(=O)OC(=O)C2=CC=1C1=CC=CC2=C1C(=O)OC2=O FYYYKXFEKMGYLZ-UHFFFAOYSA-N 0.000 description 3
- 101710130081 Aspergillopepsin-1 Proteins 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 102100031007 Cytosolic non-specific dipeptidase Human genes 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- 239000002033 PVDF binder Substances 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
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- 239000012298 atmosphere Substances 0.000 description 3
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- ANSXAPJVJOKRDJ-UHFFFAOYSA-N furo[3,4-f][2]benzofuran-1,3,5,7-tetrone Chemical compound C1=C2C(=O)OC(=O)C2=CC2=C1C(=O)OC2=O ANSXAPJVJOKRDJ-UHFFFAOYSA-N 0.000 description 3
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- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical compound NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 description 2
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 description 2
- NBAUUNCGSMAPFM-UHFFFAOYSA-N 3-(3,4-dicarboxyphenyl)phthalic acid Chemical compound C1=C(C(O)=O)C(C(=O)O)=CC=C1C1=CC=CC(C(O)=O)=C1C(O)=O NBAUUNCGSMAPFM-UHFFFAOYSA-N 0.000 description 2
- HLBLWEWZXPIGSM-UHFFFAOYSA-N 4-Aminophenyl ether Chemical compound C1=CC(N)=CC=C1OC1=CC=C(N)C=C1 HLBLWEWZXPIGSM-UHFFFAOYSA-N 0.000 description 2
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 2
- WUPRYUDHUFLKFL-UHFFFAOYSA-N 4-[3-(4-aminophenoxy)phenoxy]aniline Chemical compound C1=CC(N)=CC=C1OC1=CC=CC(OC=2C=CC(N)=CC=2)=C1 WUPRYUDHUFLKFL-UHFFFAOYSA-N 0.000 description 2
- UPGRRPUXXWPEMV-UHFFFAOYSA-N 5-(2-phenylethynyl)-2-benzofuran-1,3-dione Chemical compound C=1C=C2C(=O)OC(=O)C2=CC=1C#CC1=CC=CC=C1 UPGRRPUXXWPEMV-UHFFFAOYSA-N 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910010500 Li2.9PO3.3N0.46 Inorganic materials 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
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- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
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- 239000002174 Styrene-butadiene Substances 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
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- 238000011156 evaluation Methods 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 125000005462 imide group Chemical group 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
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- 238000009835 boiling Methods 0.000 description 1
- GGAUUQHSCNMCAU-UHFFFAOYSA-N butane-1,2,3,4-tetracarboxylic acid Chemical compound OC(=O)CC(C(O)=O)C(C(O)=O)CC(O)=O GGAUUQHSCNMCAU-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
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- 230000006378 damage Effects 0.000 description 1
- OWEZJUPKTBEISC-UHFFFAOYSA-N decane-1,1-diamine Chemical compound CCCCCCCCCC(N)N OWEZJUPKTBEISC-UHFFFAOYSA-N 0.000 description 1
- YQLZOAVZWJBZSY-UHFFFAOYSA-N decane-1,10-diamine Chemical compound NCCCCCCCCCCN YQLZOAVZWJBZSY-UHFFFAOYSA-N 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
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- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
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- GNOIPBMMFNIUFM-UHFFFAOYSA-N hexamethylphosphoric triamide Chemical compound CN(C)P(=O)(N(C)C)N(C)C GNOIPBMMFNIUFM-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
1.融点が300℃以下であるポリイミド系樹脂からなる電極用バインダー樹脂。
2.前記ポリイミド系樹脂が、テトラカルボン酸成分とジアミン成分とから得られるポリイミドであって、テトラカルボン酸成分またはジアミン成分の少なくとも一方が、脂肪族化合物を50モル%以上含むポリイミドを含む、前記項1に記載の電極用バインダー樹脂。
3.前記ポリイミドが、下記化学式(1)で表される構造単位1種以上からなるポリイミドである、前記項2に記載の電極用バインダー樹脂。
(式中、R1は、芳香環を1個または2個有する4価の基であり、R2は、炭素数1〜20の2価のアルキレン基である。)
4.前記化学式(1)中のR1が、下記化学式(2)〜(5)の4価の基からなる群から選択される1種以上である、前記項3に記載の電極用バインダー樹脂。
6.前記付加反応基が、フェニルエチニル基、またはアセチレン結合を含む基である、前記項5に記載の電極用バインダー樹脂。
7.前記付加反応性イミドオリゴマーが、下記化学式(6)で表される付加反応性イミドオリゴマーである、前記項6に記載の電極用バインダー樹脂。
(式中、R3は、芳香環を1個または2個有する4価の基からなる群から選択される1種以上であり、R4は、炭素数1〜20の2価の炭化水素基からなる群から選択される1種以上であり、R5は、アセチレン結合を含む1価の基であり、nは1〜15の整数である。ここで、各構造単位に含まれるR3及びR4は、同一であっても、異なっていてもよい。)
9.前記項1〜7のいずれか1項に記載の電極用バインダー樹脂と、電極活物質と、溶剤とを含む電極合剤ペースト。
10.前記溶剤が、非極性溶剤である、前記項9に記載の電極合剤ペースト。
11.固体電解質をさらに含む、前記項9または10に記載の電極合剤ペースト。
14.前記電極合剤層が、金属箔からなる集電体の表面に形成されている、前記項13に記載の電極。
15.前記電極合剤層が、固体電解質をさらに含む、前記項13または14に記載の電極。
(式中、Aは、テトラカルボン酸成分からカルボキシル基を除いた4価の基であり、Bは、ジアミン成分からアミノ基を除いた2価の基である。)
化学式(1)において、R1は、芳香環を1個または2個有する4価の基であり、R2は、炭素数1〜20の2価のアルキレン基である。
化学式(6)において、R3は、芳香環を1個または2個有する4価の基からなる群から選択される1種以上であり、R4は、炭素数1〜20の2価の炭化水素基からなる群から選択される1種以上であり、R5は、アセチレン結合を含む1価の基、好ましくはフェニルエチニル基を有する1価の基であり、nは1〜15の整数である。ただし、各構造単位に含まれるR3及びR4は、同一であっても、異なっていてもよい。
<融点測定方法(DSC法)>
示差走査熱量計DSC−50(島津製作所)を用い、室温(25℃)から500℃まで20℃/minにて昇温を行い、融点を測定した。
<付着性試験(クロスカット法)>
付着性試験は、JIS K 5600−5−6に準拠して行った。なお、評価は目視により、評価基準(3)に準拠した分類0〜分類5(数字が小さいほど強固に付着している)で示した。
ODPA:4,4’−オキシジフタル酸二無水物、
s−BPDA:3,3’,4,4’−ビフェニルテトラカルボン酸二無水物、
a−BPDA:2,3’,3,4’−ビフェニルテトラカルボン酸二無水物、
PMDA:ピロメリット酸二無水物、
PEPA:4−フェニルエチニルフタル酸無水物、
PETA:フェニルエチニルトリメリット酸無水物、
PPD:p−フェニレンジアミン、
MPD:m−フェニレンジアミン、
ODA:4,4’−ジアミノジフェニルエーテル、
TPE−R:1,3−ビス(4−アミノフェノキシ)ベンゼン、
DMD:デカメチレンジアミン、
HMD:ヘキサメチレンジアミン、
NMP:N−メチル−2−ピロリドン、
PVdF:ポリフッ化ビニリデン、
SBR:スチレンブタジエンゴム
酸無水物としてs−BPDA、ジアミンとしてDMDを用い(s−BPDA:DMD=1:1(モル比))、NMP中、180℃で12時間重合させてイミド化が完結したポリイミド溶液を得た。この溶液を水中に分散させ、析出させたポリイミドを濾別した。水洗及び濾別を3回繰り返し、回収したポリイミドを150℃で24時間乾燥させて電極用バインダー樹脂を得た。この樹脂の融点は190℃であった。
得られた電極用バインダー樹脂3gに珪素粉末7g及びヘキサン90gを添加して混錬し、電極合剤ペーストを調製した。このペーストを銅箔に塗布し、常圧、窒素雰囲気下の熱風乾燥機にて120℃で60分間加熱処理した後、250℃で熱プレスして電極を作製した。この電極について付着性試験を行った結果、付着性は分類0であった。
実施例1で得られた電極用バインダー樹脂3gにカルボキシメチルセルロース1g、珪素粉末7g及び水90gを添加して混錬し、電極合剤ペーストを調製した。このペーストを用いた以外は実施例1と同様にして電極を作製した。この電極について付着性試験を行った結果、付着性は分類0であった。
酸無水物をODPAに変更した以外は実施例1と同様にして電極用バインダー樹脂を得た。この樹脂の融点は150℃であった。この電極用バインダー樹脂を用いた以外は実施例1と同様にして電極を作製した。この電極について付着性試験を行った結果、付着性は分類0であった。
酸無水物としてa−BPDA及びPEPA、ジアミンとしてTPE−R及びMPDを用いた(a−BPDA:PEPA:TPE−R:MPD=1:2:1:1(モル比))以外は実施例1と同様にして電極用バインダー樹脂を得た。この樹脂の融点は175℃であった。この電極用バインダー樹脂を用いた以外は実施例1と同様にして電極を作製した。この電極について付着性試験を行った結果、付着性は分類0であった。
酸無水物としてODPA及びPETA、ジアミンとしてHMDを用いた(ODPA:PETA:HMD=1:2:2(モル比))以外は実施例1と同様にして電極用バインダー樹脂を得た。この樹脂の融点は170℃であった。この電極用バインダー樹脂を用いた以外は実施例1と同様にして電極を作製した。この電極について付着性試験を行った結果、付着性は分類0であった。
酸無水物としてODPA、s−BPDA及びPETA、ジアミンとしてODA、PPDを用いた(ODPA:s−BPDA:PETA:ODA:PPD=5:5:20:14:6(モル比))以外は実施例1と同様にして電極用バインダー樹脂を得た。この樹脂の融点は250℃であった。この電極用バインダー樹脂を用いた以外は実施例1と同様にして電極を作製した。この電極について付着性試験を行った結果、付着性は分類0であった。
酸無水物としてs−BPDA、ジアミンとしてPPDをNMP中、180℃で12時間重合させ、イミド化が完結したポリイミド分散NMP溶液を得た。析出したポリイミドを濾別した後、水洗及び濾別を3回繰り返し実施し、回収したポリイミドを150℃で24時間乾燥させてポリイミド粉末を得た。この樹脂の融点を測定したが、融点は観測されなかった。
得られたポリイミド粉末3gに珪素粉末7g及びヘキサン90gを添加して混錬し、電極合剤ペーストを調製した。このペーストを銅箔に塗布し、常圧、窒素雰囲気下の熱風乾燥機にて120℃で60分間加熱処理した後、350℃で熱プレスしたが、電極合剤層と銅箔が接着しなかったため電極は作製できなかった。
酸無水物としてPMDA、ジアミンとしてODAをNMP中、180℃で12時間重合させ、イミド化が完結したポリイミド分散NMP溶液を得た。析出したポリイミドを濾別した後、水洗及び濾別を3回繰り返し実施し、回収したポリイミドを150℃で24時間乾燥させてポリイミド粉末を得た。この樹脂の融点を測定したが、融点は観測されなかった。
得られたポリイミド粉末3gに珪素粉末7g及びヘキサン90gを添加して混錬し、電極合剤ペーストを調製した。このペーストを銅箔に塗布し、常圧、窒素ガス雰囲気下の熱風乾燥機にて120℃で60分間加熱処理した後、350℃で熱プレスしたが、電極合剤層と銅箔が接着しなかったため電極は作製できなかった。
PVdF3gに珪素粉末7g及びヘキサン90gを添加して混錬し、電極合剤ペーストを調製した。このペーストを銅箔に塗布し、常圧、窒素ガス雰囲気下の熱風乾燥機にて120℃で60分間加熱処理した後、250℃で熱プレスして電極を作製した。この電極について付着性試験を行った結果、付着性は分類5であり、接着性は非常に悪かった。
SBR3gに珪素粉末7g及びヘキサン90gを添加して混錬し、電極合剤ペーストを調製した。このペーストを塗布した銅箔を、常圧、窒素ガス雰囲気下の熱風乾燥機にて120℃で60分間加熱処理した後、250℃で熱プレスして電極を作製した。この電極について付着性試験を行った結果、付着性は分類4であり、接着性は悪かった。
Claims (8)
- 融点が300℃以下であるポリイミド系樹脂からなる電極用バインダー樹脂と、電極活物質と、溶剤とを含み、前記溶剤が、非極性溶剤であることを特徴とする電極合剤ペースト。
- 前記ポリイミド系樹脂が、テトラカルボン酸成分とジアミン成分とから得られるポリイミドであって、テトラカルボン酸成分またはジアミン成分の少なくとも一方が、脂肪族化合物を50モル%以上含むポリイミドを含む、請求項1に記載の電極合剤ペースト。
- 前記ポリイミド系樹脂が、平均重合度が50以下であるイミドオリゴマーの少なくとも一方の末端に付加反応基を有する付加反応性イミドオリゴマーを含む、請求項1に記載の電極合剤ペースト。
- 前記付加反応基が、フェニルエチニル基、またはアセチレン結合を含む基である、請求項5に記載の電極合剤ペースト。
- 固体電解質をさらに含む、請求項1〜7のいずれか1項に記載の電極合剤ペースト。
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