JP2023503221A - 電極触媒インク - Google Patents
電極触媒インク Download PDFInfo
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- JP2023503221A JP2023503221A JP2022521373A JP2022521373A JP2023503221A JP 2023503221 A JP2023503221 A JP 2023503221A JP 2022521373 A JP2022521373 A JP 2022521373A JP 2022521373 A JP2022521373 A JP 2022521373A JP 2023503221 A JP2023503221 A JP 2023503221A
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- Prior art keywords
- electrocatalyst
- base metal
- dispersion
- ion
- preparing
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Images
Classifications
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- H—ELECTRICITY
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- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/8663—Selection of inactive substances as ingredients for catalytic active masses, e.g. binders, fillers
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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
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/8605—Porous electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
- H01M4/8803—Supports for the deposition of the catalytic active composition
- H01M4/8807—Gas diffusion layers
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- H—ELECTRICITY
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- H01M4/88—Processes of manufacture
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- H—ELECTRICITY
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- H01M4/88—Processes of manufacture
- H01M4/8803—Supports for the deposition of the catalytic active composition
- H01M4/8814—Temporary supports, e.g. decal
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Abstract
Description
i)電極触媒材料、イオン伝導性材料、及び希釈剤を含む分散液を調製する工程と、次に、
ii)分散液を塩基金属結合剤と接触させる工程と、を含む。
i)本発明の第1の態様の方法によって電極触媒インクを調製する工程と、次に、
ii)電極触媒インクを当該基材上に適用し、インクを乾燥させて、電極触媒層を形成する工程と、を含む。第4の態様では、本発明は、この方法によって取得可能な電極触媒層を提供する。
i)本発明の第5の態様の方法に従ってガス拡散電極を調製する工程と、
ii)工程i)において調製されたガス拡散電極をイオン伝導性膜の面に適用する工程と、を含む。第13の態様では、本発明は、この方法によって取得可能な膜電極接合体を提供する。
i)本発明の第9又は第10の態様の方法に従って、触媒被覆イオン伝導性膜を調製する工程と、
ii)ガス拡散層を電極触媒層に適用する工程と、を含む。第15の態様では、本発明は、この方法によって取得可能な膜電極接合体を提供する。
(i)本発明のガス拡散電極を、イオン伝導性膜の各面に適用する。好ましくは、次いで、層は、ともに積層され、
(ii)本発明のガス拡散電極を、一方の側面のみが電極触媒層を含む、触媒被覆イオン伝導膜の一方の面に適用し、ガス拡散層を電極触媒層に適用する。触媒被覆イオン伝導性膜は、本発明の電極触媒層を含む、本発明の触媒被覆イオン伝導性膜であり得る。
(i)本発明のイオン伝導性膜の両方の電極触媒層にガス拡散層を適用する、
(ii)ガス拡散電極を、一方の側面のみが電極触媒層を含む、発明のイオン伝導性膜の一方の面に適用し、電極触媒層にガス拡散層を適用する。ガス拡散電極は、本発明のガス拡散電極であり得る。
5つの電極触媒インクを、E1、E2、E3、E4、及びC1に調製した。
・ E1は、脱合金化された30重量Pt%のPt2Ni/C電極触媒及び3M 800 EWの名称で、3Mによって供給される800 EW PFSAアイオノマーを含有した。
・ E2は、脱合金化された30重量Pt%のPt2Ni/C電極触媒及びIQ171の名称で、Asahi Glassによって供給される700 EW PFSAアイオノマーを含有した。
・ E3は、脱合金化された金30重量Pt%のPt2Ni/C電極触媒及びDE2020CSの名称で、Chemours Companyによって供給される950 EW PFSAアイオノマーを含有した。
・ E4は、10重量Pt%のPtNi2/C電極触媒及び3M 800EWの名称で、3Mによって供給される800 EW PFSAアイオノマーを含有した。電極触媒は、脱合金化の工程に供されなかった。
・ C1は、脱合金化された30重量Pt%のPt2Ni/C電極触媒及び3M 800 EWの名称で、3Mによって供給される800 EW PFSAアイオノマーを含有した。
電極触媒インクE1、E2、E3を、封止された容器に入れ、3.67g(E1)、2.85g(E2)又は3.11g(E3)のDow Chemical Company製の塩基金属結合剤Dowex(登録商標)M4195樹脂を添加した。塩基金属結合剤の電極触媒材料(ミリング後)に対する重量比は、各インクにおいて約1:3であった。次いで、封止された容器を、48時間バレルローリングした後、塩基金属結合剤を、濾過により除去した。樹脂を、誘導結合プラズマ質量分析(inductively coupled plasma mass spectrometry、ICPMS)によって、ニッケル含有量(総樹脂及びニッケルの重量%)について分析し、結果を表1に示す。塩基金属結合剤が、電極触媒インクからニッケル種を除去することは明らかである。
膜電極接合体の調製
アノード及びカソード触媒層をPTFEシート上に堆積させ、150℃~200℃の温度でPFSA強化膜(15μm厚)のいずれかの面に適切な層を転写することにより、50cm2の活性領域の2つの触媒被覆イオン伝導性膜を調製した。
50cm2膜電極接合体の各々の分極(電流対電圧)性能を、完全に加湿及び加圧(100%RH、100kPag)条件下、並びに両方ともそれぞれ化学量論1.5及び2.0のH2及びエアフローを使用する、より乾燥した周囲圧力(50%並びに26%のRH及び周囲圧力)の条件下で、80℃においてH2/空気中で測定した。電池湿度(RH)及び圧力を、周囲圧力試験中に、100kPagで試験するためのアノード及びカソード入口で制御し、出口は、周囲圧力であった。
1. 電極触媒インクを調製する方法であって、
i) 電極触媒材料、イオン伝導性材料、及び希釈剤を含む分散液を調製する工程と、次に、
ii) 分散液を塩基金属結合剤と接触させる工程と、を含む、方法。
i) 条項1~12のいずれか一項に記載の方法によって電極触媒インクを調製する工程と、次に、
ii) 電極触媒インクを基材上に適用し、インクを乾燥させて、電極触媒層を形成する工程と、を含む、方法。
i) 条項15に記載の方法に従ってガス拡散電極を調製する工程と、
ii) 工程i)において調製されたガス拡散電極をイオン伝導性膜の面に適用する工程と、を含む、方法。
i) 条項19又は条項20に記載の方法に従って触媒被覆イオン伝導性膜を調製する工程と、
ii) ガス拡散層を電極触媒層に適用する工程と、を含む、方法。
Claims (26)
- 電極触媒インクを調製する方法であって、
i) 電極触媒材料、イオン伝導性材料、及び希釈剤を含む分散液を調製する工程と、次に、
ii) 前記分散液を塩基金属結合剤と接触させる工程と、を含む、方法。 - 前記イオン伝導性材料が、プロトン伝導性アイオノマーである、請求項1に記載の方法。
- 前記電極触媒材料が、白金族金属であるか、又は塩基金属と白金族金属の合金である、電極触媒を含む、先行請求項のいずれか一項に記載の方法。
- 前記電極触媒が、担持材料上に担持されている、先行請求項のいずれか一項に記載の方法。
- 工程i)が、前記分散液中の凝集体を破壊する工程を含む、先行請求項のいずれか一項に記載の方法。
- 前記分散液中の凝集体を破壊する前記工程が、ボールミリングによって実行される、請求項5に記載の方法。
- 工程ii)が、工程ii)で調製された前記分散液中に前記塩基金属結合剤を分散させることを含み、前記方法が、前記分散液を濾過して、前記塩基金属結合剤を除去する工程iii)を更に含む、先行請求項のいずれか一項に記載の方法。
- 前記分散液が、工程ii)において撹拌される、請求項7に記載の方法。
- 工程ii)が、前記塩基金属結合剤で充填されたカラムに前記分散液を通過させることを含む、請求項1~6のいずれか一項に記載の方法。
- 工程ii)が、前記塩基金属結合剤を含有する容器を前記分散液中に入れることを含み、前記容器が、前記分散液に対しては透過性であるが、前記塩基金属結合剤に対しては透過性ではない、請求項1~6のいずれか一項に記載の方法。
- 前記塩基金属結合剤が、塩基金属キレート剤である、先行請求項のいずれか一項に記載の方法。
- 前記塩基金属キレート剤が、塩基金属キレート窒素含有部分を含む、請求項11に記載の方法。
- 前記塩基金属結合剤が、酸性カチオン交換樹脂である、請求項1~10のいずれか一項に記載の方法。
- 電極触媒層を基材に適用する方法であって、
請求項1~13のいずれか一項に記載の方法によって電極触媒インクを調製する工程と、次に、
i) 前記電極触媒インクを前記基材上に適用し、前記インクを乾燥させて、電極触媒層を形成する工程と、を含む、方法。 - 請求項14に記載の方法によって取得可能な電極触媒層。
- ガス拡散電極を調製する方法であって、請求項14に記載の方法に従って、電極触媒層を基材に適用することを含み、前記基材が、ガス拡散層の面である、方法。
- 請求項16に記載の方法によって取得可能なガス拡散電極。
- 触媒デカール転写基材を調製する方法であって、請求項14に記載の方法に従って電極触媒層を基材に適用することを含み、前記基材が、デカール転写基材の面である、方法。
- 請求項18に記載の方法によって取得可能な触媒デカール転写基材。
- 触媒被覆イオン伝導性膜を調製する方法であって、請求項14に記載の方法に従って電極触媒層を基材に適用することを含み、前記基材が、イオン伝導性膜の面である、方法。
- 触媒被覆イオン伝導性膜を調製する方法であって、請求項18に記載の方法に従って調製された触媒デカール転写基材からのデカール転写によって、電極触媒層をイオン伝導性膜に適用することを含む、方法。
- 請求項20又は21に記載の方法によって取得可能な触媒被覆イオン伝導性膜。
- 膜電極接合体を調製するための方法であって、
i) 請求項16に記載の方法に従ってガス拡散電極を調製する工程と、
ii) 工程i)において調製された前記ガス拡散電極をイオン伝導性膜の面に適用する工程と、を含む、方法。 - 膜電極接合体を調製するための方法であって、
i) 請求項20又は21に記載の方
ii) ガス拡散層を前記電極触媒層に適用する工程と、を含む、方法。 - 請求項23又は24に記載の方法によって取得可能な膜電極接合体。
- 請求項25に記載の膜電極接合体を備える燃料電池。
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JP2012123927A (ja) * | 2010-12-06 | 2012-06-28 | Nippon Soken Inc | 触媒層部材と膜電極接合体および燃料電池 |
JP2016058396A (ja) * | 2015-12-10 | 2016-04-21 | トヨタ自動車株式会社 | 燃料電池用電極、燃料電池用電極の製造方法、固体高分子形燃料電池、および触媒インクの製造方法 |
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AU2020403637A1 (en) | 2022-04-28 |
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