JP2019192624A - 燃料電池用電解質膜の製造方法及びそれによって製造された電解質膜 - Google Patents
燃料電池用電解質膜の製造方法及びそれによって製造された電解質膜 Download PDFInfo
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Abstract
Description
10’ 電解質膜
11 一面
12 他面
20 気体
Claims (14)
- 燃料電池用電解質膜の製造方法であって、
イオン伝導性高分子、及び上記イオン伝導性高分子が3次元的に接して形成される水素イオン移動チャネル(Channel)を含む電解質層を準備する段階と、
上記電解質層の一面から該一面に対向する他面への方向に気体を透過(Permeation)させて上記水素イオン移動チャネルの屈曲度(Tortuosity)を下げる段階と、
を含む燃料電池用電解質膜の製造方法。 - 電解質層を準備する段階において、
上記イオン伝導性高分子は、主鎖(Main−Chain)にポリテトラフルオロエチレン(PTFE:Polytetrafluoroethylene)を含み、側鎖(Side−Chain)にスルホン酸基(−SO3H)を含む、請求項1に記載の燃料電池用電解質膜の製造方法。 - 電解質層を準備する段階において、
上記電解質層の厚さは5μm〜100μmである、請求項1に記載の燃料電池用電解質膜。 - 電解質層を準備する段階において、
上記電解質層は、イオン伝導性高分子だけを含む純粋層と、イオン伝導性高分子及び3次元網状構造の支持体を含む混合層とを含み、
上記純粋層及び上記混合層は互いに隣接して配置され、上記純粋層と上記混合層との間にイオンが移動可能である、請求項1に記載の燃料電池用電解質膜の製造方法。 - 上記3次元網状構造の支持体は、
延伸されたポリテトラフルオロエチレン(e−PTFE:expanded−Polytetrafluoroethylene)、3.5Mamu〜7.5Mamuの気孔性超高分子量ポリエチレン(UHMWPE:Porous Ultra High Molecular Weight Polyethylene)及びそれらの組合せからなる群から選ばれる、請求項4に記載の燃料電池用電解質膜。 - 上記水素イオン移動チャネルの屈曲度を下げる段階において、
上記気体は、水蒸気(H2O)、エタノール(C2H5OH)、プロパノール(C3H7OH)及びそれらの混合物からなる群から選ばれる、請求項1に記載の燃料電池用電解質膜の製造方法。 - 上記水素イオン移動チャネルの屈曲度を下げる段階において、
上記気体に上記イオン伝導性高分子のアルファ(α)転移温度(Ta:α−Transition Temperature)より2℃高い温度〜200℃温度の熱を加えて透過させる、請求項1に記載の燃料電池用電解質膜の製造方法。 - 上記水素イオン移動チャネルの屈曲度を下げる段階において、
上記気体は上記イオン伝導性高分子のアルファ(α)転移温度より2℃高い温度未満の沸点を有する、請求項1に記載の燃料電池用電解質膜の製造方法。 - 上記水素イオン移動チャネルの屈曲度を下げる段階において、
上記気体の飽和蒸気圧によって上記気体が上記電解質層を透過する、請求項1に記載の燃料電池用電解質膜の製造方法。 - 上記水素イオン移動チャネルの屈曲度を下げる段階において、
上記気体の飽和蒸気圧は0.01MPa〜1MPaの圧力である、請求項1に記載の燃料電池用電解質膜の製造方法。 - 上記水素イオン移動チャネルの屈曲度を下げる段階において、
上記気体は単位時間及び単位面積当たりの透過量が0.1〜10[mg/cm2.min]である、請求項1に記載の燃料電池用電解質膜の製造方法。 - 上記水素イオン移動チャネルの屈曲度を下げる段階において、
上記電解質層において上記気体の上記一面の濃度が上記他面よりも高く形成され、上記気体が上記一面から上記他面への方向に透過する、請求項1に記載の燃料電池用電解質膜の製造方法。 - 上記水素イオン移動チャネルの屈曲度を下げる段階において、
上記電解質層において上記気体の上記一面の圧力が上記他面よりも高く形成され、上記気体が上記一面から上記他面への方向に透過する、請求項1に記載の燃料電池用電解質膜の製造方法。 - 上記水素イオン移動チャネルの屈曲度を下げる段階において、
上記気体を加熱することを特徴とする、請求項12又は13に記載の燃料電池用電解質膜の製造方法。
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Patent Citations (4)
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JPH09199144A (ja) * | 1996-01-12 | 1997-07-31 | Toyota Central Res & Dev Lab Inc | 電解質膜の製造方法 |
JP2008270045A (ja) * | 2007-04-23 | 2008-11-06 | Toyota Motor Corp | 膜電極接合体の製造方法、膜電極接合体、膜電極接合体の製造装置、及び燃料電池 |
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