JP2016529663A - 固体酸化物燃料電池の燃料極支持体の製造方法および固体酸化物燃料電池の燃料極支持体 - Google Patents
固体酸化物燃料電池の燃料極支持体の製造方法および固体酸化物燃料電池の燃料極支持体 Download PDFInfo
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- JP2016529663A JP2016529663A JP2016531561A JP2016531561A JP2016529663A JP 2016529663 A JP2016529663 A JP 2016529663A JP 2016531561 A JP2016531561 A JP 2016531561A JP 2016531561 A JP2016531561 A JP 2016531561A JP 2016529663 A JP2016529663 A JP 2016529663A
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- electrode support
- fuel electrode
- fuel cell
- solid oxide
- oxide fuel
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- 239000001301 oxygen Substances 0.000 claims description 19
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- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims description 16
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- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 claims description 11
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- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
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- 238000012935 Averaging Methods 0.000 description 1
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- 229910052769 Ytterbium Inorganic materials 0.000 description 1
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- XOFYMHSKOPWFQD-UHFFFAOYSA-N [O-2].[Fe+2].[Co+2].[Sr+2].[Ba+2].[O-2].[O-2].[O-2] Chemical compound [O-2].[Fe+2].[Co+2].[Sr+2].[Ba+2].[O-2].[O-2].[O-2] XOFYMHSKOPWFQD-UHFFFAOYSA-N 0.000 description 1
- RJBSIFOTJSUDHY-UHFFFAOYSA-N [O-2].[Fe+2].[Co+2].[Sr+2].[La+3] Chemical compound [O-2].[Fe+2].[Co+2].[Sr+2].[La+3] RJBSIFOTJSUDHY-UHFFFAOYSA-N 0.000 description 1
- YMVZSICZWDQCMV-UHFFFAOYSA-N [O-2].[Mn+2].[Sr+2].[La+3] Chemical compound [O-2].[Mn+2].[Sr+2].[La+3] YMVZSICZWDQCMV-UHFFFAOYSA-N 0.000 description 1
- OQKOQEWPYHIUMN-UHFFFAOYSA-N [Sr].[Co]=O.[Sm] Chemical compound [Sr].[Co]=O.[Sm] OQKOQEWPYHIUMN-UHFFFAOYSA-N 0.000 description 1
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- WUOACPNHFRMFPN-UHFFFAOYSA-N alpha-terpineol Chemical compound CC1=CCC(C(C)(C)O)CC1 WUOACPNHFRMFPN-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 229910000416 bismuth oxide Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
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- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 description 1
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- LNTHITQWFMADLM-UHFFFAOYSA-N gallic acid Chemical compound OC(=O)C1=CC(O)=C(O)C(O)=C1 LNTHITQWFMADLM-UHFFFAOYSA-N 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
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- 239000002905 metal composite material Substances 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- SVRRMEJIJVIXAM-UHFFFAOYSA-N oxobismuth;ruthenium Chemical compound [Ru].[Bi]=O SVRRMEJIJVIXAM-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- 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
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Abstract
Description
燃料極支持体としてGDC(10mole% Gd doped Ceria)とNiOを50:50の体積比の比率にして厚さ3ミリメートルの燃料極支持体を1−軸加圧方法で製造し、1,450℃の温度で焼結した。その後、850℃の温度で還元ガス(H2)を用いてNiO/GDCをNi/GDCに30分間還元させた。
実施例1において硝酸を用いた表面処理をしない場合、表面に多孔性構造が存在せず、表面粗さは100ナノメートルであった。比較例1による燃料極支持体表面のSEM写真を図2に示す。
実施例1で製造した燃料極支持体の硝酸で処理された表面にGDCをディップコーティング方法により10マイクロメータ厚さで塗布し、1,450℃の温度で焼結して電解質を形成した。電解質上にLSCFをスクリーンプリント方法により30マイクロメータ厚さで塗布し、1,000℃の温度で焼結した後、空気極層を形成して燃料電池セルを製造した。
比較例1の燃料極支持体を用いて製造例1の方法と同様な方法により燃料電池セルを製造した。
製造例1〜2の燃料電池セルでインピーダンスを測定し、表面のセル耐久性を比較するために面積固有抵抗を測定した。その測定結果を図4に示す。
製造例1〜2の燃料電池セルでI−V−P方法によって試験したセル性能データを測定した。そのセル性能の測定結果を図5に示す。
Claims (19)
- 金属および酸素イオン伝導性を有する無機酸化物を含む燃料極支持体の少なくとも1つの表面に酸性溶液を接触させて表面処理するステップを含む固体酸化物燃料電池の燃料極支持体の製造方法。
- 前記酸性溶液のpHは1〜6の溶液であることを特徴とする、請求項1に記載の固体酸化物燃料電池の燃料極支持体の製造方法。
- 前記酸性溶液は、硝酸、塩酸、硫酸および酢酸からなる群から選択されたいずれか1つを含む溶液であることを特徴とする、請求項1に記載の固体酸化物燃料電池の燃料極支持体の製造方法。
- 前記金属は、Zr、Ce、Ti、Mg、Al、Si、Mn、Fe、Co、Ni、Cu、Zn、Mo、Y、Nb、Sn、La、Ta、VおよびNdからなる群から選択されることを特徴とする、請求項1に記載の固体酸化物燃料電池の燃料極支持体の製造方法。
- 前記酸素イオン伝導性を有する無機酸化物は、ガドリニウムがドープされたセリア(GDC)、ガドリニウムがドープされたジルコニア(GDZ)、サマリウムがドープされたセリア(SDC)、サマリウムがドープされたジルコニア(SDZ)、イットリウムがドープされたセリア(YDC)、イットリウムがドープされたジルコニア(YDZ)、イットリア安定化ジルコニア(YSZ)およびスカンジア安定化ジルコニア(ScSZ)からなる群から選択された1つ以上であることを特徴とする、請求項1に記載の固体酸化物燃料電池の燃料極支持体の製造方法。
- 前記表面処理された表面を含む部分は孔隙率5%以上50%以下、孔隙の大きさ0.1マイクロメータ以上1ミリメートル以下の多孔性構造であり、
前記多孔性構造は全体燃料極支持体を基準に5体積%以上50体積%以下で存在することを特徴とする、請求項1に記載の固体酸化物燃料電池の燃料極支持体の製造方法。 - 前記表面処理された表面の粗さは200ナノメートル以上1,000ナノメートル以下であることを特徴とする、請求項1に記載の固体酸化物燃料電池の燃料極支持体の製造方法。
- 前記表面処理された表面の面積固有抵抗(ASR:area specific resistance)は0.01Ωcm2以上0.5Ωcm2以下であることを特徴とする、請求項1に記載の固体酸化物燃料電池の燃料極支持体の製造方法。
- 前記表面処理された表面は電解質と接する部分であることを特徴とする、請求項1に記載の固体酸化物燃料電池の燃料極支持体の製造方法。
- 請求項1〜9のいずれか1項に記載の製造方法を利用して燃料極支持体を製造するステップ、および前記燃料極支持体の表面処理された表面にイオン伝導性を有する無機酸化物を塗布して電解質を形成するステップを含む固体酸化物燃料電池の製造方法。
- 前記電解質に含まれる無機酸化物は燃料極支持体に含まれる無機酸化物と同一であることを特徴とする、請求項10に記載の固体酸化物燃料電池の製造方法。
- 請求項1〜9のいずれか1項に記載の製造方法によって製造された固体酸化物燃料電池の燃料極支持体。
- 金属および酸素イオン伝導性を有する無機酸化物を含む固体酸化物燃料電池の燃料極支持体であって、
前記燃料極支持体の少なくとも1つの表面を含む部分が孔隙率5%以上50%以下、孔隙の大きさ0.1マイクロメータ以上1ミリメートル以下の多孔性構造であり、
前記多孔性構造は全体燃料極支持体を基準に5体積%以上50体積%以下で存在する固体酸化物燃料電池の燃料極支持体。 - 前記燃料極支持体において、多孔性構造が存在する表面の粗さは200ナノメートル以上1,000ナノメートル以下であることを特徴とする、請求項13に記載の固体酸化物燃料電池の燃料極支持体。
- 前記燃料極支持体において、多孔性構造が存在する表面の面積固有抵抗(ASR:area specific resistance)は0.01Ωcm2以上0.5Ωcm2以下であることを特徴とする、請求項13に記載の固体酸化物燃料電池の燃料極支持体。
- 前記燃料極支持体において、多孔性構造が存在する表面は電解質と接する部分であることを特徴とする、請求項13に記載の固体酸化物燃料電池の燃料極支持体。
- 請求項13〜16のいずれか1項に記載の燃料極支持体を準備するステップ、および前記燃料極支持体の表面処理された表面にイオン伝導性を有する無機酸化物を塗布して電解質を形成するステップを含む固体酸化物燃料電池の製造方法。
- 前記電解質に含まれる無機酸化物は燃料極支持体に含まれる無機酸化物と同一であることを特徴とする、請求項17に記載の固体酸化物燃料電池の製造方法。
- 請求項13〜16のいずれか1項に記載の燃料極支持体、
前記燃料極支持体と対向して位置する空気極、および
前記燃料極支持体と空気極との間に位置する電解質を含む固体酸化物燃料電池。
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