105 citations · 470 across the 17 of their papers we have counts for
17 papers
Ultra-uniform Nanocrystalline Materials via Two-Step Sintering
Yanhao Dong, Hongbing Yang, Lin Zhang +6
Nanocrystalline metals and ceramics with <100 nm grain sizes and superior properties (e.g., mechanical strength, hardness, fracture toughness and stored dielectric energy) are of g…
Hole polaron assisted oxygen ion migration in LiMnO
Yanhao Dong, I-Wei Chen, Ju Li
Oxygen ion migration in Li2MnO3 was systematically studied by first-principles calculations. Hole polaron is found effective to lower the migration barrier of oxygen ion.
DC Electrical Degradation of YSZ: Voltage Controlled Electrical Metallization of A Fast Ion Conducting Insulator
Ana Alvarez, Yanhao Dong, I-Wei Chen
DC electrical degradation as a form of dielectric and resistance breakdown is a common phenomenon in thin-film devices including resistance-switching memory. To obtain design data…
Potential jumps at transport bottlenecks cause instability of nominally ionic solid electrolytes in electrochemical cells
Yanhao Dong, Zhichao Zhang, Ana Alvarez +1
Normal operations of electrochemical devices such as solid oxide fuel cells (SOFC), solid oxide electrolyzer cells (SOEC) and lithium ion batteries (LIB) sometimes fail because of…
Inversion of oxygen potential transitions at grain boundaries of SOFC/SOEC electrolytes
Yanhao Dong, I-Wei Chen
Solid oxide fuel/electrolyzer cell (SOFC/SOEC) converts energy between chemical and electrical forms inversely. Yet electrolyte degradation takes place much more severe for SOEC th…
Electron Localization Enhances Cation Diffusion in Reduced ZrO2, CeO2 and BaTiO3
Yanhao Dong, Liang Qi, Ju Li +1
According to defect chemistry, the experimental observations of enhanced cation diffusion in a reducing atmosphere in zirconia, ceria and barium titanate are in support of an inter…
Electron Localization Enhances Cation Diffusion in Transition Metal Oxides: An Electronic Trebuchet Effect
Yanhao Dong, Liang Qi, Ju Li +1
Ion diffusion is a central part of materials physics of fabrication, deformation, phase transformation, structure stability and electrochemical devices. Conventional theory focuses…
Oxygen Potential Transition in Mixed Conducting Oxide Electrolyte
Yanhao Dong, I-Wei Chen
It is generally assumed that oxygen potential in a thin oxide electrolyte follows a linear distribution between electrodes. Jacobsen and Mogensen have shown, however, that this is…
Purely electronic nanometallic ReRAM
Yang Lu, Jung Ho Yoon, Yanhao Dong +1
Resistance switching random access memory (ReRAM), with the ability to repeatedly modulate electrical resistance, has been highlighted as a feasible high-density memory with the po…
Electrical and Hydrogen Reduction Enhances Kinetics in Doped Zirconia and Ceria: II. Mapping Electrode Polarization and Vacancy Condensation in YSZ
Yanhao Dong, I-Wei Chen
Knowing the correlation between grain boundary mobility and oxygen potential in yttria stabilized zirconia (YSZ), we have utilized the grain size as a microstructural marker to map…
A Mathematical Treatment to Determine Transient Growth Kinetics from a Given Size Distribution
Yanhao Dong, Jian Han
Particle coarsening and grain growth take place to minimize the total interfacial energy. The classical mean-field treatments by Lifshitz, Slyozov, [1] Wagner [2] and Hillert [3] p…
Grain Growth with Size-Dependent or Statistically Distributed Mobility
Yanhao Dong, I-Wei Chen
Conventional grain growth is rate-limited by the mobility of grain boundary. To describe similar phenomena limited by the mobility of other grain junctions, we have developed a gen…
Mobility Transition at Grain Boundaries in Two-Step Sintered 8 mol% Yttria Stabilized Zirconia
Yanhao Dong, I-Wei Chen
Stagnation of grain growth is often attributed to impurity segregation. Yttria-stabilized cubic zirconia does not evidence any segregation-induced slowdown, as its grain growth obe…
On the Onset of the Flash Transition in Single Crystals of Cubic Zirconia
Yanhao Dong
The reported onset temperatures of the flash transition in cubic zirconia single crystals have been analyzed in the present note. The analysis for high-temperature low-field data g…
On the Hotspot Problem in Flash Sintering
Yanhao Dong
A perturbation analysis has been conducted to evaluate the generation of hotspots inside an electrical loaded ceramic sample, which is assumed to have an Arrhenius-type conductivit…
A Computational Study of Yttria-Stabilized Zirconia: II. Cation Diffusion
Yanhao Dong, Liang Qi, Ju Li +1
Cubic yttria-stabilized zirconia is widely used in industrial electrochemical devices. While its fast oxygen ion diffusion is well understood, why cation diffusion is much slower-i…
A Computational Study of Yttria-Stabilized Zirconia: I. Using Crystal Chemistry to Search for the Ground State on a Glassy Energy Landscape
Yanhao Dong, Liang Qi, Ju Li +1
Yttria-stabilized zirconia (YSZ), a ZrO2-Y2O3 solid solution that contains a large population of oxygen vacancies, is widely used in energy and industrial applications. Past comput…