JP2005268145A - 電解質膜及びその製造方法 - Google Patents
電解質膜及びその製造方法 Download PDFInfo
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Classifications
-
- 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
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
-
- 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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Conductive Materials (AREA)
- Fuel Cell (AREA)
Abstract
【解決手段】イオン伝導性を有する電解質膜において、残溶媒を一定以下に取り除いた後、酸を用いてイオン性基を酸型に変換することにより良好な電解質膜を得る製造方法を提供するものである。
【選択図】なし
Description
本発明は、イオン伝導性を有するポリマーより得られた膜の残溶媒量を特定の範囲内にした後、酸によりイオン性基のカチオン種を85モル%以上水素原子とした電解質膜の製造方法により、耐メタノール透過性とイオン伝導性に優れた電解質膜を提供するものである。
導電率[S/cm]=1/膜幅[cm]x膜厚[cm]x抵抗極間勾配[Ω/cm]
3,3’−ジスルホ−4,4’−ジクロロジフェニルスルホン2ナトリウム塩(略号:S−DCDPS)を3.683g(0.0075モル)、2,6−ジクロロベンゾニトリル(略号:DCBN)を3.010g(0.0175モル)、4,4’−ビフェノールを4.650g(0.025モル)、炭酸カリウムを3.968g(0.0288モル)、モレキュラーシーブ2.61gを100ml四つ口フラスコに計り取り、窒素を流した。35mlのNMPを入れて、150℃で一時間撹拌した後、反応温度を195−200℃に上昇させて系の粘性が十分上がるのを目安に反応を続けた(約5時間)。放冷の後、沈降しているモレキュラーシーブを除いて水中にストランド状に沈殿させた。得られたポリマーは、沸騰水中で1時間洗浄した後、乾燥した。ポリマーの対数粘度は1.68を示した。濃度を調整したポリマーNMP溶液を、ホットプレート上ガラス板に厚みを調節してキャストし、残存NMP量が膜全体に対し4%になるまで乾燥し、厚さ平均200μmのフィルムを調製した。得られたフィルムを2mol/lに調製した硫酸に室温で1時間浸漬し、純水で洗浄して、余分な硫酸を除いた後、乾燥し、電解質膜を得た。この電解質膜のIECは1.55で、スルホン酸基の水素原子は該カチオン種に対し95モル%であった。本電解質膜のイオン伝導性は0.16S/cmで良好なイオン伝導性を示した。また、メタノール透過性を評価したところ、メタノール透過速度は0.67mmol/(m2・sec)で耐メタノール透過性に優れていることがわかった。
実施例1で得られた電解質膜を用いて膜−電極接合体を作製し、発電評価を行ったところ、5mol/lのメタノール水溶液を用いたときの出力電圧は0.462Vであり、10mol/lのメタノール水溶液を用いたときの出力電圧は0.445Vであった。その結果からメタノール濃度上昇による出力低下は0.017Vであり、出力電圧が高く、高濃度のメタノールの透過も少ない電解質膜であるといえる。
実施例1において製膜時の残存NMP量を膜全体の22重量%とし、その他は同様にして電解質膜を得た。この電解質膜のIECは1.39で、スルホン酸基の水素原子は該カチオン種に対し85モル%であった。本電解質膜のイオン伝導性は0.10S/cmであったが、メタノール透過速度は12mmol/(m2・sec)でメタノール透過量が多く、ダイレクトメタノール型燃料電池用電解質膜として到底使用できるものではなかった。
実施例1において製膜時の残存NMP量を膜全体の0.3重量%とし、その他は同様にして電解質膜を得た。この電解質膜のIECは1.28で、スルホン酸基の水素原子は該カチオン種に対し79モル%であった。本電解質膜のイオン伝導性は0.008S/cmと低く、電解質膜として不十分な性能であった。
Claims (7)
- イオン伝導性を有する電解質膜において、残溶媒率が膜全体の0.5重量%以上20重量%以下とした後、酸によりイオン性基のカチオン種を少なくとも85モル%以上水素原子に変換したことを特徴とする電解質膜。
- 上記酸が硫酸であることを特徴とする請求項1記載の電解質膜。
- 25℃における5mol/Lのメタノール水溶液に対するメタノール透過速度が10mmol/(m2・sec)以下であり、80℃、相対湿度95%でのイオン伝導率が0.01S/cm以上であることを特徴とする請求項1乃至2記載の電解質膜。
- 請求項1乃至4のいずれかの範囲の電解質膜の製造方法。
- 請求項1乃至4のいずれかの範囲の電解質膜を使用した電解質膜・電極接合体。
- 請求項6の範囲の電解質膜・電極接合体を使用した燃料電池。
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JP2004081915A JP4821946B2 (ja) | 2004-03-22 | 2004-03-22 | 電解質膜及びその製造方法 |
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Publications (2)
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JP2005268145A true JP2005268145A (ja) | 2005-09-29 |
JP4821946B2 JP4821946B2 (ja) | 2011-11-24 |
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Cited By (6)
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JP2007042585A (ja) * | 2005-07-07 | 2007-02-15 | Fujifilm Holdings Corp | 固体電解質フィルム及びその製造方法、製造設備並びに電極膜複合体及び燃料電池 |
JP2007250490A (ja) * | 2006-03-20 | 2007-09-27 | Toyota Central Res & Dev Lab Inc | 電解質/非電解質ブレンド膜及びその製造方法 |
JP2007265925A (ja) * | 2006-03-30 | 2007-10-11 | Fujifilm Corp | 固体電解質フィルム及びその製造方法、製造設備、並びに電極膜複合体、燃料電池 |
JP2007265926A (ja) * | 2006-03-30 | 2007-10-11 | Fujifilm Corp | 固体電解質フィルム及びその製造方法、並びに電極膜複合体、燃料電池 |
JP2007262346A (ja) * | 2006-03-30 | 2007-10-11 | Fujifilm Corp | 固体電解質フィルム及びその製造方法、製造設備、並びに電極膜複合体、燃料電池 |
JP2008282795A (ja) * | 2007-04-13 | 2008-11-20 | Fujifilm Corp | 固体電解質フイルムの製造方法 |
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WO2002071518A1 (de) * | 2001-03-01 | 2002-09-12 | Celanese Ventures Gmbh | Polymermembran, verfahren zu deren herstellung sowie deren verwendung |
JP2002367628A (ja) * | 2001-06-12 | 2002-12-20 | Honda Motor Co Ltd | 固体高分子型燃料電池用電極構造体 |
JP2003217342A (ja) * | 2002-01-24 | 2003-07-31 | Toyobo Co Ltd | 光架橋性高分子固体電解質、架橋高分子固体電解質膜及びその製造方法 |
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JP2002110190A (ja) * | 2000-09-26 | 2002-04-12 | Matsushita Electric Ind Co Ltd | 燃料電池 |
WO2002071518A1 (de) * | 2001-03-01 | 2002-09-12 | Celanese Ventures Gmbh | Polymermembran, verfahren zu deren herstellung sowie deren verwendung |
JP2002367628A (ja) * | 2001-06-12 | 2002-12-20 | Honda Motor Co Ltd | 固体高分子型燃料電池用電極構造体 |
JP2003217342A (ja) * | 2002-01-24 | 2003-07-31 | Toyobo Co Ltd | 光架橋性高分子固体電解質、架橋高分子固体電解質膜及びその製造方法 |
JP2003217343A (ja) * | 2002-01-24 | 2003-07-31 | Toyobo Co Ltd | 熱架橋性高分子固体電解質、高分子固体電解質膜及びその製造方法 |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2007042585A (ja) * | 2005-07-07 | 2007-02-15 | Fujifilm Holdings Corp | 固体電解質フィルム及びその製造方法、製造設備並びに電極膜複合体及び燃料電池 |
JP2007250490A (ja) * | 2006-03-20 | 2007-09-27 | Toyota Central Res & Dev Lab Inc | 電解質/非電解質ブレンド膜及びその製造方法 |
JP2007265925A (ja) * | 2006-03-30 | 2007-10-11 | Fujifilm Corp | 固体電解質フィルム及びその製造方法、製造設備、並びに電極膜複合体、燃料電池 |
JP2007265926A (ja) * | 2006-03-30 | 2007-10-11 | Fujifilm Corp | 固体電解質フィルム及びその製造方法、並びに電極膜複合体、燃料電池 |
JP2007262346A (ja) * | 2006-03-30 | 2007-10-11 | Fujifilm Corp | 固体電解質フィルム及びその製造方法、製造設備、並びに電極膜複合体、燃料電池 |
JP2008282795A (ja) * | 2007-04-13 | 2008-11-20 | Fujifilm Corp | 固体電解質フイルムの製造方法 |
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