التفاصيل البيبلوغرافية
| العنوان: |
Electrochemical Performance of SrMg 0.1 Mo 0.9 O 3 ‑Based Composites for Solid Oxide Fuel Cell Anodes |
| المؤلفون: |
Amit Das (347085), Sunil Kumar (102321), Biswajit Jana (4918195), Madireddy Buchi Suresh (11973748), Chalavadi Prashanthi (11973751), Shobit Omar (9292960) |
| سنة النشر: |
1753 |
| المجموعة: |
Smithsonian Institution: Digital Repository |
| مصطلحات موضوعية: |
Biophysics, Medicine, Cell Biology, Biotechnology, Cancer, Plant Biology, Computational Biology, Space Science, Chemical Sciences not elsewhere classified, typical fuel environment, dc electrical conductivity, 950 ° c, 850 ° c, 800 ° c, phase boundary length, cubic perovskite phase, dense buffer layer, ∼ 14 μm, traditional mixing method, 9 , 2 , 1 , electrode layer thickness, significantly low area, porous buffer layer, δ , 2 , buffer layer coated, electrochemical performance attained, optimized electrode composite |
| الوصف: |
The electrochemical performance of porous composites of Gd 0.1 Ce 0.9 O 2− δ /SrMg 0.1 Mo 0.9 O 3− δ is investigated for the anode application under a typical fuel environment of solid oxide fuel cells (SOFCs). Nanosized powder of SrMg 0.1 Mo 0.9 O 3− δ possessing a cubic perovskite phase is synthesized using the solution-combustion method. Composites having the composition of x Gd 0.1 Ce 0.9 O 2− δ /SrMg 0.1 Mo 0.9 O 3− δ (where x is a weight fraction of Gd 0.1 Ce 0.9 O 2− δ ranging from 0.5 to 0.8) are prepared using a traditional mixing method. At 850 °C, the DC electrical conductivity of SrMg 0.1 Mo 0.9 O 3− δ under moist 20% H 2 /N 2 is 617 S·cm –1 which declines to ∼105 S·cm –1 for 0.6Gd 0.1 Ce 0.9 O 2− δ /SrMg 0.1 Mo 0.9 O 3− δ . Symmetric cells are fabricated using dense disks of yttria-stabilized zirconia as an electrolyte with a thin Gd 0.1 Ce 0.9 O 2− δ buffer layer coated on both faces. An optimized slurry of the composite electrode is blade-coated on the dense buffer layer and subsequently sintered at 950 °C in air. Scanning electron microscopy reveals a porous microstructure with an electrode layer thickness of ∼14 μm. A single-phase SrMg 0.1 Mo 0.9 O 3− δ electrode exhibits an area-specific resistance of 0.28 Ω·cm 2 , which is less than 6 times the value offered by undoped SrMoO 3 at 800 °C in 3% H 2 O/H 2 . The optimum Gd 0.1 Ce 0.9 O 2− δ addition ( x = 0.7) to SrMg 0.1 Mo 0.9 O 3− δ resulted in a significantly low area-specific resistance of 0.09 Ω·cm 2 at 800 °C. The performance of the optimized electrode composite is also evaluated by modifying the microstructure of the Gd 0.1 Ce 0.9 O 2− δ buffer layer. Interestingly, the symmetrical cell with a porous buffer layer further reduces the electrode area-specific resistance to 0.065 Ω·cm 2 . The observed results are ascribed to the penetration of electrocatalyst SrMg 0.1 Mo 0.9 O 3− δ particles inside the porous buffer layer during the blade-coating. This possibly extends the triple-phase boundary length and facilitates the charge-transfer ... |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| العلاقة: |
https://figshare.com/articles/journal_contribution/Electrochemical_Performance_of_SrMg_sub_0_1_sub_Mo_sub_0_9_sub_O_sub_3_sub_Based_Composites_for_Solid_Oxide_Fuel_Cell_Anodes/18737149Test |
| DOI: |
10.1021/acsaem.1c03029.s001 |
| الإتاحة: |
https://doi.org/10.1021/acsaem.1c03029.s001Test |
| حقوق: |
CC BY-NC 4.0 |
| رقم الانضمام: |
edsbas.44FFA967 |
| قاعدة البيانات: |
BASE |
