@article {1144,
	title = {Migration of inclusions in a matrix due to a spatially varying interface energy},
	journal = {Scripta Materialia},
	volume = {206},
	year = {2022},
	pages = {114235},
	abstract = {An interfacial energy can be a function of a bulk field such as temperature or electric field. We find that in a system with a gradient in temperature or electric potential, the resulting variation in interfacial energy can induce a particle to migrate by either surface or bulk diffusion. For a circular particle under a constant unidirectional gradient in the bulk field, the field dependence of the interfacial energy induces a circular particle to move as a circle at a constant velocity along the direction from higher to lower interfacial energy. A linear stability analysis of this steady state migration suggests that perturbations will damp out as time evolves, and thus under these conditions a migrating circular particle is morphologically stable. Other spatial distributions of interface energy can lead to the distortion of an initially circular shaped particle during migration. A phase field model is developed that captures these distortions and verifies the theoretical results mentioned above.},
	keywords = {Bulk diffusion, Interface diffusion, Interface energy depends on a field varying with location, Particle migration},
	issn = {1359-6462},
	doi = {https://doi.org/10.1016/j.scriptamat.2021.114235},
	url = {https://www.sciencedirect.com/science/article/pii/S1359646221005157},
	author = {Qian Zhang and Scott Barnett and Peter Voorhees}
}
@article {1160,
	title = {Modeling Electrokinetics of Oxygen Electrodes in Solid Oxide Electrolyzer Cells},
	journal = {Journal of The Electrochemical Society},
	volume = {168},
	year = {2021},
	month = {11/2021},
	pages = {114510},
	abstract = {A microscale model is presented in this study to simulate electrode kinetics of the oxygen electrode in a solid oxide electrolyzer cell (SOEC). Two mixed ionic/electronic conducting structures are examined for the oxygen producing electrode in this work: single layer porous lanthanum strontium cobalt ferrite (LSCF), and bilayer LSCF/SCT (strontium cobalt tantalum oxide) structures. A yttrium-stabilized zirconia (YSZ) electrolyte separates the hydrogen and oxygen electrodes, as well as a gadolinium doped-ceria (GDC) buffer layer on the oxygen electrode side. Electrochemical reactions occurring at the two-phase boundaries (2PBs) and three-phase boundaries (3PBs) of single-layer LSCF and bilayer LSCF/SCT oxygen electrodes are modeled under various SOEC voltages with lattice oxygen stoichiometry as the key output. The results reveal that there exists a competition in electrode kinetics between 2PBs and 3PBs, but 3PBs are the primary reactive sites for single-layer LSCF oxygen electrode under high voltages. These locations experience the greatest oxygen stoichiometry variations and are therefore the most likely locations for dimensional changes. By applying an active SCT layer over LSCF, the 2PBs become activated to compete with the 3PBs, thus alleviating oxygen stoichiometry variations and reducing the likelihood of dimensional change. This strategy could reduce lattice structural expansion, proving to be valuable for electrode-electrolyte delamination prevention and will be the focus of future work.},
	keywords = {Barium zirconate, Defect transport, electrode-electrolyte delamination prevention, Faradaic efficiency, lattice oxygen stoichiometry, microscale model, o-SOEC, oxygen electrode, solid oxide electrolyzer cell},
	doi = {10.1149/1945-7111/ac35fc},
	url = {https://doi.org/10.1149/1945-7111/ac35fc},
	author = {Korey Cook and Jacob Wrubel and Zhiwen Ma and Kevin Huang and Xinfang Jin}
}
@article {1162,
	title = {Performance Indicators for Benchmarking Solar Thermochemical Fuel Processes and Reactors},
	journal = {Frontiers in Energy Research},
	volume = {9},
	year = {2021},
	abstract = {Concentrated solar energy offers a source for renewable high-temperature process heat that can be used to efficiently drive endothermic chemical processes, converting the entire spectrum of solar radiation into chemical energy. In particular, solar-driven thermochemical processes for the production of fuels include reforming of methane and other hydrocarbons, gasification of biomass, coal, and other carbonaceous feedstock, and metal oxide redox cycles for splitting H2O and CO2. A notable issue in the development of these processes and their associated solar reactors is the lack of consistent reporting methods for experimental demonstrations and modelling studies, which complicates the benchmarking of the corresponding technologies. In this work we formulate dimensionless performance indicators based on mass and energy balances of such reacting systems, namely: energy efficiency, conversion extent, selectivity, and yield. Examples are outlined for the generic processes mention above. We then provide guidelines for reporting on such processes and reactors and suggest performance benchmarking on four key criteria: energy efficiency, conversion extent, product selectivity, and performance stability.},
	keywords = {benchmarking, concentrated solar power, solar fuels and chemicals, solar reactors, thermochemical processes},
	issn = {2296-598X},
	doi = {10.3389/fenrg.2021.677980},
	url = {https://www.frontiersin.org/article/10.3389/fenrg.2021.677980},
	author = {Bulfin, Brendan and Miranda, Miguel and Steinfeld, Aldo}
}
@article {1127,
	title = {CeTi2O6{\textemdash}A Promising Oxide for Solar Thermochemical Hydrogen Production},
	journal = {ACS Applied Materials \& Interfaces},
	volume = {12},
	year = {2020},
	pages = {21521-21527},
	keywords = {brannerite structure, Cerium based oxides, CeTi2O6, high thermal stability, large entropy of reduction, small reduction enthalpy},
	doi = {CeTi2O6{\textemdash}A Promising Oxide for Solar Thermochemical Hydrogen Production},
	author = {S. S. Naghavi and J. He and C. Wolverton}
}
@article {1181,
	title = {Advancement of Proton-Conducting Solid Oxide Fuel Cells and Solid Oxide Electrolysis Cells at Idaho National Laboratory (INL)},
	journal = {ECS Transactions},
	volume = {91},
	year = {2019},
	month = {07/2019},
	pages = {1029{\textendash}1034},
	abstract = {Proton conducting ceramics have been considered as a strategic material system used in solid oxide fuel cells and solid oxide electrolysis cells for electricity generation and hydrogen production. The high proton conductivity of protonic electrolyte and rapid development of robust electrode materials have significantly promoted the reduction of feasible operating temperature to intermediate temperature range (400 600 {\textdegree}C), which can attribute to favorable technical and economic advantages when they are compared with conventional oxide-ion conducting electrolyte based solid oxide cell system. In the past few years, Idaho National Laboratory has been devoted to developing advanced electrolyte and electrode materials R\&D, diverse manufacturing capability, and expanding evaluation facility for these applications, aiming to further improve performance, stability and manufacturing cost. There are some remarkable accomplishments achieved on electrode engineering, electrolyte optimization, new material down-selection and large-scale cell fabrication in Idaho National Laboratory.},
	keywords = {BCZYYb7111, HTE, NiO-BaCe0.7Zr0.1Y0.1Yb0.1O3, PrBa0.5Sr0.5Co1.5Fe0.5O3, Protonic conductor, SOEC},
	doi = {10.1149/09101.1029ecst},
	url = {https://doi.org/10.1149/09101.1029ecst},
	author = {Hanping Ding and Wei Wu and Dong Ding}
}
@article {1191,
	title = {Progress in Metal-Supported Solid Oxide Fuel Cells and Electrolyzers with Symmetric Metal Supports and Infiltrated Electrodes},
	journal = {ECS Transactions},
	volume = {91},
	year = {2019},
	month = {07/2019},
	pages = {877{\textendash}885},
	abstract = {The LBNL metal-supported solid oxide cell architecture contains zirconia electrolyte and porous backbones co-sintered between porous stainless steel supports. Advantages of this design include low-cost structural materials, mechanical ruggedness, excellent tolerance to redox cycling, and extremely fast start-up capability. With infiltrated catalysts, high performance is also achieved: 1.5 W/cm2 with hydrogen fuel and 1.3 W/cm2 with internal reforming of ethanol fuel at 700 {\textdegree}C; 2.6 A/cm2 electrolysis current density at 1.3V and 50\% steam/50\% hydrogen at 700{\textdegree}C. Recent approaches to mitigating catalyst coarsening and Cr deposition within the cathode stabilize the microstructure during operation. The degradation rate is improved to 2.3\% kh-1 at 700{\textdegree}C in fuel cell mode. Electrolysis operation, however, results in higher degradation rate. Preliminary effort to fabricate metal-supported cells with proton conducting electrolyte is successful for La0.99Ca0.01NbO4 electrolyte, and specific challenges for BaZr0.7Ce0.2Y0.1O3-δ electrolyte are determined.},
	keywords = {BaZr0.7Ce0.2Y0.1O3-δ electrolyte, HTE, La0.99Ca0.01NbO4 electrolyte, SOEC},
	doi = {10.1149/09101.0877ecst},
	url = {https://doi.org/10.1149/09101.0877ecst},
	author = {Emir Dogdibegovic and Fengyu Shen and Ruofan Wang and Ian Robinson and Grace Y Lau and Michael C Tucker}
}
@article {1193,
	title = {Synergistic Coupling of Proton Conductors BaZr0.1Ce0.7Y0.1Yb0.1O3-δ and La2Ce2O7 to Create Chemical Stable, Interface Active Electrolyte for Steam Electrolysis Cells},
	journal = {ACS Applied Materials \& Interfaces},
	volume = {11},
	year = {2019},
	pages = {18323-18330},
	keywords = {BaZr0.1Ce0.7Y0.1Yb0.1O3-δ, durability, HTE, La2Ce2O7, Protonic ceramic electrolysis cell, SOEC},
	doi = {10.1021/acsami.9b00303},
	url = {https://doi.org/10.1021/acsami.9b00303},
	author = {Li, Wenyuan and Guan, Bo and Ma, Liang and Tian, Hanchen and Liu, Xingbo}
}
@article {1195,
	title = {High performing triple-conductive Pr2NiO4+δ anode for proton-conducting steam solid oxide electrolysis cell },
	journal = {Journal of Materials Chemistry A},
	volume = {6},
	year = {2018},
	pages = {18057-18066},
	abstract = {The development of proton-conducting solid oxide electrolysis cells for the intermediate-temperature range application is largely hindered by the limited choice of adequate anode materials. In this study, the popular solid oxide fuel cell cathode material Pr2NiO4+δ (PNO) is investigated as the anode for the electrolysis cell, considering its proton-conducting ability. The introduction of protons into the PNO lattice is confirmed through insertion-induced conductivity variation measurements. Good chemical compatibility is verified between PNO and BaZr0.2Ce0.6Y0.2O3-δ (BZCY) proton-conducting electrolyte. Excellent catalytic activity towards water splitting is observed for the PNO{\textendash}BZCY composite anode, 0.52 Ω cm2 for 550 {\textdegree}C, 0.057 Ω cm2 for 700 {\textdegree}C. The water-splitting process is disclosed by impedance spectroscopy measured under different conditions. Due to proton conduction in PNO, the PNO surface is activated for electrochemical reactions. The non-charge transfer processes account little to the electrode resistance. The performance of the PNO{\textendash}BZCY anode is determined by two charge transfer processes whose kinetics are governed the electrolyzing potential. This charge transfer-limiting nature is relatively benign since the electrode resistance has been found to exponentially reduce with increasing overpotential. Cathode-supported Ni{\textendash}BZCY//BZCY//PNO{\textendash}BZCY thin film electrolyte single cells are fabricated and characterized. \~{}95\% current efficiency is confirmed. At 700 {\textdegree}C, a current density of 977 mA cm-2 is achieved at a 1.3 V electrolyzing potential, e.g. 0.37 V overpotential, which is one of the best performances of proton-conducting steam electrolysis cells so far. The PNO{\textendash}BZCY anode accounts only for 16\% of the overall polarization resistance at 700 {\textdegree}C. These findings prove that the triple-conductive PNO is a promising anode material for proton-based steam electrolysis cells.},
	keywords = {BaZr0.2Ce0.6Y0.2O3-δ, HTE, Pr2NiO4+δ, Protonic ceramic electrolysis cells, SOEC},
	doi = {10.1039/C8TA04018D},
	url = {http://dx.doi.org/10.1039/C8TA04018D},
	author = {Li, Wenyuan and Guan, Bo and Ma, Liang and Hu, Shanshan and Zhang, Nan and Liu, Xingbo}
}
