JP6740528B2 - 高濃度にドープされたセリアを含む電極 - Google Patents
高濃度にドープされたセリアを含む電極 Download PDFInfo
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- JP6740528B2 JP6740528B2 JP2018561690A JP2018561690A JP6740528B2 JP 6740528 B2 JP6740528 B2 JP 6740528B2 JP 2018561690 A JP2018561690 A JP 2018561690A JP 2018561690 A JP2018561690 A JP 2018561690A JP 6740528 B2 JP6740528 B2 JP 6740528B2
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- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 title claims description 93
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 title claims description 92
- 239000002346 layers by function Substances 0.000 claims description 54
- 239000010410 layer Substances 0.000 claims description 44
- 239000002019 doping agent Substances 0.000 claims description 42
- 239000000203 mixture Substances 0.000 claims description 31
- 239000003792 electrolyte Substances 0.000 claims description 30
- 239000000463 material Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 24
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 18
- 150000002910 rare earth metals Chemical class 0.000 claims description 18
- 230000004888 barrier function Effects 0.000 claims description 17
- 229910052747 lanthanoid Inorganic materials 0.000 claims description 17
- 150000002602 lanthanoids Chemical class 0.000 claims description 17
- 229910052746 lanthanum Inorganic materials 0.000 claims description 17
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 14
- 229910052779 Neodymium Inorganic materials 0.000 claims description 14
- 229910052723 transition metal Inorganic materials 0.000 claims description 14
- 150000003624 transition metals Chemical class 0.000 claims description 14
- 229910052772 Samarium Inorganic materials 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 238000005245 sintering Methods 0.000 claims description 8
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 7
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 7
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 6
- 229910052788 barium Inorganic materials 0.000 claims description 6
- 229910052791 calcium Inorganic materials 0.000 claims description 6
- 229910052712 strontium Inorganic materials 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- LNTHITQWFMADLM-UHFFFAOYSA-N gallic acid Chemical compound OC(=O)C1=CC(O)=C(O)C(O)=C1 LNTHITQWFMADLM-UHFFFAOYSA-N 0.000 claims description 3
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229910002076 stabilized zirconia Inorganic materials 0.000 claims description 3
- 230000005518 electrochemistry Effects 0.000 claims description 2
- 229910000314 transition metal oxide Inorganic materials 0.000 claims description 2
- 229910052777 Praseodymium Inorganic materials 0.000 claims 6
- 229910052789 astatine Inorganic materials 0.000 claims 1
- 229910044991 metal oxide Inorganic materials 0.000 description 37
- 150000004706 metal oxides Chemical class 0.000 description 35
- 238000002441 X-ray diffraction Methods 0.000 description 21
- 239000002131 composite material Substances 0.000 description 10
- 230000008901 benefit Effects 0.000 description 9
- 229910052692 Dysprosium Inorganic materials 0.000 description 7
- 238000000137 annealing Methods 0.000 description 7
- 239000000446 fuel Substances 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- 238000009792 diffusion process Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 229910052691 Erbium Inorganic materials 0.000 description 5
- 229910052769 Ytterbium Inorganic materials 0.000 description 5
- 229910052727 yttrium Inorganic materials 0.000 description 5
- -1 MO metal oxide Chemical class 0.000 description 4
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 229910052689 Holmium Inorganic materials 0.000 description 3
- 229910021193 La 2 O 3 Inorganic materials 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- 229910001233 yttria-stabilized zirconia Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 239000002001 electrolyte material Substances 0.000 description 2
- 229910002119 nickel–yttria stabilized zirconia Inorganic materials 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 238000002407 reforming Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical group [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
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Description
Ce(1−x−y)AxByO2を有し、式中、Aは少なくとも1つの希土類ドーパントであり、Bは少なくとも1つのアルカリ土類ドーパントであり、xは少なくとも0.2であり、yは0〜0.2の範囲にあり、x+yは少なくとも0.4かつセリアの溶解度限界を超えない。
Ce(1−x−y)AxByO2を有するドープされたセリアを含み、式中、Aは少なくとも1つの希土類ドーパントであり、Bは少なくとも1つのアルカリ土類ドーパントであり、xは少なくとも0.05であり、yは0〜0.1の範囲にあり、x+yは0.05より大きくかつ0.25未満である。特定の実施形態において、Aは、La、Gd、Nd、Sm、Dy、Er、Y、Yb、Ho、またはそれらの任意の組み合わせである。特定の実施形態において、Bは、Sr、Ca、Ba、またはそれらの任意の組み合わせである。
Ce(1−x−y)AxByO2を有するドープされたセリアを含み、式中、Aは少なくとも1つの希土類ドーパントであり、Bは少なくとも1つのアルカリ土類ドーパントであり、xは少なくとも0.05であり、yは0〜0.2の範囲にあり、x+yは0.05より大きくかつセリアの溶解限度を超えない。特定の実施形態において、Aは、La、Gd、Nd、Sm、Dy、Er、Y、Yb、Ho、Pr、またはそれらの任意の組み合わせである。特定の実施形態において、Bは、Sr、Ca、Ba、またはそれらの任意の組み合わせである。
Ln2MO4相を含む機能層を備え、式中、Lnは任意に金属がドープされた少なくとも1つのランタニドであり、Mは少なくとも1つの3d遷移金属であり、
機能層は、一般式Ce(1−x−y)AxByO2を有するドープされたセリアを含むセリア相をさらに含み、式中、Aは少なくとも1つの希土類ドーパントであり、Bは少なくとも1つのアルカリ土類ドーパントであり、xは0.2より大きく、yは0〜0.2の範囲にあり、x+yは0.4より大きくかつセリアの溶解限度を超えない、電極。
Ln2MO4相を含む機能層を備え、式中、Lnは任意に金属がドープされた少なくとも1つのランタニドであり、Mは少なくとも1つの3d遷移金属であり、
機能層は、一般式Ce(1−x−y)AxByO2を有するドープされたセリアを含むセリア相をさらに含み、式中、Aは少なくとも1つの希土類ドーパントであり、Bは少なくとも1つのアルカリ土類ドーパントであり、xは少なくとも0.2であり、yは0〜0.2の範囲にあり、x+yは少なくとも0.4かつセリアの溶解限度を超えず、
Ln2MO4相の少なくとも1つのランタニドは、セリア相の少なくとも1つの希土類ドーパントと同じである、電極。
Ln2MO4相を含む機能層を備え、式中、Lnは任意に金属がドープされた少なくとも1つのランタニドであり、Mは少なくとも1つの3d遷移金属であり、
機能層は、一般式Ce(1−x−y)AxByO2を有するドープされたセリアを含むセリア相をさらに含み、式中、Aは少なくとも1つの希土類ドーパントであり、Bは少なくとも1つのアルカリ土類ドーパントであり、xは少なくとも0.2であり、yは0〜0.2の範囲にあり、x+yは少なくとも0.4かつセリアの溶解限度を超えず、
セリア相は、いかなる多孔性もない機能層の総体積を基準にして、少なくとも40体積%の量で機能層中に存在する、電極。
Ln2MO4材料(式中、Lnは任意に金属がドープされた少なくとも1つのランタニドであり、Mは少なくとも1つの3d遷移金属である)を準備することと、
一般式Ce(1−x−y)AxByO2を有するドープされたセリアを含むセリア材料(式中、Aは少なくとも1つの希土類ドーパントであり、Bは少なくとも1つのアルカリ土類ドーパントであり、xは少なくとも0.2であり、yは0〜0.2の範囲にあり、x+yは少なくとも0.4かつセリアの溶解限度を超えない)を準備することと、
Ln2MO4材料とセリア材料とを混合して混合物を形成することと、
混合物を少なくとも1000℃かつ動作温度より大きい温度で焼結して、Ln2MO4およびセリア相を有する酸素電極の機能層を形成することと、を含む方法。
種々の試料のCTEを測定した。
試料3は、46:54体積%のSDC:LNO、56:44体積%のSDC:LNO、および66:34体積%のSDC:LNOでのSDC−LNO組成物を含み、それぞれは、1300℃で5時間アニールした後のものであった。試料3の初期組成物は、低濃度にドープされたSDC相(Sm0.2Ce0.8O2)、およびLNO相(La2NiO4)を含んでいた。試料3に対するX線回折(XRD)のパターンは、図1のグラフにて与えられる。66:34体積%のSDC:LNO混合物の場合、XRDパターンからの格子定数をSm0.2La0.23Ce0.57O2−δとして測定することにより、セリア格子に組み込まれたLaの量を推定することができた。セリア格子中のLa2O3の吸着のために、LNOは、枯渇したLa2O3であり、これは分解およびNiOの形成をもたらす。
Ni−YSZアノード、YSZ電解質、SDCバリア層、およびLNO−LDC40カソード機能層を用いて固体酸化物燃料電池を調製した。LNO−LDC40カソード機能層の厚さは約20〜30μmであった。カソード機能層の多孔性は約15%であった。さらに、電解質とカソード機能層との間においていかなる絶縁相が形成されるのを回避するために、十分に高密度のSDCバリア層をYSZ電解質と機能層との間に配置した。SDCバリア層の厚さは約3μmであり、その多孔性は約3%であった。多層燃料電池のSEM画像を図8に与え、高性能を示すSOFCボタン電池の性能特性を図9に与える。
Claims (15)
- 電極であって、
Ln2MO4相を含む機能層を備え、式中、Lnは任意にアルカリ土類金属がドープされたLa、Pr、Nd、Gd、およびSmの少なくとも1つであり、MはNi、Cu、Co、Fe、およびMnからなる群から選択される少なくとも1つの3d遷移金属であり、
前記機能層は、一般式Ce(1−x)AxO2を有するドープされたセリアを含むセリア相をさらに含み、式中、AはLa、Pr、Sm、Gd、およびNdの少なくとも1つであり、xは0.4より大きくかつセリアの溶解限度を超えない、電極。 - 電極であって、
Ln2MO4相を含む機能層を備え、式中、LnはLa、Pr、Nd、Gd、およびSmの少なくとも1つであり、MはNi、Cu、Co、Fe、およびMnからなる群から選択される少なくとも1つの3d遷移金属であり、
前記機能層は、一般式Ce(1−x)AxO2を有するドープされたセリアを含むセリア相をさらに含み、式中、AはLa、Pr、Sm、Gd、およびNdの少なくとも1つであり、xは少なくとも0.4かつセリアの溶解限度を超えず、
前記セリア相は、いかなる多孔性もない前記機能層の総体積を基準にして、少なくとも40体積%の量で前記機能層中に存在する、電極。 - 電極を形成する方法であって、
Ln2MO4材料(式中、Lnは任意にアルカリ土類金属がドープされたLa、Pr、Nd、Gd、およびSmの少なくとも1つであり、MはNi、Cu、Co、Fe、Mn、およびそれらの任意の組み合わせからなる群から選択される少なくとも1つの3d遷移金属である)を準備することと、
一般式Ce(1−x)AxO2(式中、AはLa、Pr、Sm、Gd、およびNdの少なくとも1つであり、xは少なくとも0.4かつセリアの溶解限度を超えない)を有するドープされたセリアを含むセリア材料を準備することと、
前記Ln2MO4材料と前記セリア材料とを混合して混合物を形成することと、
前記混合物を少なくとも1000℃の温度で焼結して、Ln2MO4相およびセリア相を有する酸素電極の機能層を形成することと、を含み、前記セリア相は、いかなる多孔性もない前記機能層の総体積を基準にして、少なくとも40体積%の量で前記機能層中に存在する、方法。 - 前記Ln2MO4相のランタニドはSr、Ca、Ba、およびそれらの任意の組み合わせからなる群から選択されるアルカリ土類金属がドープされている、請求項1および2のいずれか一項に記載の電極。
- 前記Ln2MO4相の前記3d遷移金属は、Niを含む、請求項1および2のいずれか一項に記載の電極。
- xは少なくとも0.41である、請求項1および2のいずれか一項に記載の電極。
- xは最大0.5である、請求項1および2のいずれか一項に記載の電極。
- 前記機能層において5体積%未満の3d遷移金属酸化物が検出可能である、請求項1および2のいずれか一項に記載の電極。
- 前記セリア相は、多孔性を除いた前記機能層の総体積を基準にして、少なくとも40体積%の量で前記機能層中に存在する、請求項1および2のいずれか一項に記載の電極。
- 請求項1、2、および4〜9のいずれか一項に記載の電極を備える電気化学デバイス。
- 前記デバイスは、電解質層を備え、前記電解質層は、セリア、ジルコニア、ランタンガレート、またはそれらの組み合わせのうちの少なくとも1つを含む、請求項10に記載の電気化学デバイス。
- 前記電解質層は、一般式Ce(1−x−y)AxByO2を有するドープされたセリアを含み、式中、Aは少なくとも1つの希土類ドーパントであり、Bは少なくとも1つのアルカリ土類ドーパントであり、xは少なくとも0.05であり、yは0〜0.1の範囲にあり、x+yは0より大きくかつ0.25未満である、請求項11に記載の電気化学デバイス。
- 前記電解質層は、安定化ジルコニアを含み、前記デバイスは、前記機能層と前記電解質層との間に配置されたバリア層をさらに備える、請求項11に記載の電気化学デバイス。
- 前記バリア層は、一般式Ce(1−x−y)AxByO2を有するドープされたセリアを含み、式中、Aは少なくとも1つの希土類ドーパントであり、Bは少なくとも1つのアルカリ土類ドーパントであり、xは少なくとも0.05であり、yは0〜0.2の範囲にあり、x+yは0.05より大きくかつセリアの溶解限度を超えない、請求項13に記載の電気化学デバイス。
- 請求項1、2、および4〜9のいずれか一項に記載の電極を含むセンサデバイス。
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JP6121764B2 (ja) | 2013-03-22 | 2017-04-26 | 日本碍子株式会社 | 固体酸化物型燃料電池に用いられる空気極 |
JP6100050B2 (ja) | 2013-03-25 | 2017-03-22 | 日本碍子株式会社 | 燃料電池用空気極 |
JP2015076129A (ja) | 2013-10-04 | 2015-04-20 | 日産自動車株式会社 | 燃料電池用空気極材料、燃料電池用空気極及び固体酸化物形燃料電池 |
PT3099836T (pt) | 2014-01-14 | 2022-05-11 | Elcogen As | Método de produção de camada de barreira de difusão de cátodo de sofc e uma sofc |
JP2015185321A (ja) | 2014-03-24 | 2015-10-22 | アイシン精機株式会社 | 固体酸化物形燃料電池用空気極及び固体酸化物形燃料電池セル |
JP6315581B2 (ja) | 2014-08-22 | 2018-04-25 | 国立大学法人 熊本大学 | 固体酸化物形燃料電池用カソード及びその製造方法、並びに当該カソードを備える固体酸化物形燃料電池 |
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CN109690847B (zh) | 2021-09-17 |
KR102248541B1 (ko) | 2021-05-07 |
US20170346088A1 (en) | 2017-11-30 |
JP2019523820A (ja) | 2019-08-29 |
EP3465807A4 (en) | 2019-12-04 |
KR20190035617A (ko) | 2019-04-03 |
US10622628B2 (en) | 2020-04-14 |
KR102185472B1 (ko) | 2020-12-03 |
KR20200133819A (ko) | 2020-11-30 |
EP3465807A1 (en) | 2019-04-10 |
CN109690847A (zh) | 2019-04-26 |
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