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Your search keyword '"Chi, Miaofang"' showing total 24 results
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24 results on '"Chi, Miaofang"'

4. Revealing Variable Dependences in Hexagonal Boron Nitride Synthesis via Machine Learning

Author

Park, Ji-Hoon, primary, Lu, Ang-Yu, additional, Tavakoli, Mohammad Mahdi, additional, Kim, Na Yeon, additional, Chiu, Ming-Hui, additional, Liu, Hongwei, additional, Zhang, Tianyi, additional, Wang, Zhien, additional, Wang, Jiangtao, additional, Martins, Luiz Gustavo Pimenta, additional, Luo, Zhengtang, additional, Chi, Miaofang, additional, Miao, Jianwei, additional, and Kong, Jing, additional

Published
2023
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11. Elucidating Interfacial Stability between Lithium Metal Anode and Li Phosphorus Oxynitride via In SituElectron Microscopy

Author

Hood, Zachary D., Chen, Xi, Sacci, Robert L., Liu, Xiaoming, Veith, Gabriel M., Mo, Yifei, Niu, Junjie, Dudney, Nancy J., and Chi, Miaofang

Abstract

Li phosphorus oxynitride (LiPON) is one of a very few solid electrolytes that have demonstrated high stability against Li metal and extended cyclability with high Coulombic efficiency for all solid-state batteries (ASSBs). However, theoretical calculations show that LiPON reacts with Li metal. Here, we utilize in situelectron microscopy to observe the dynamic evolutions at the LiPON–Li interface upon contacting and under biasing. We reveal that a thin interface layer (∼60 nm) develops at the LiPON–Li interface upon contact. This layer is composed of conductive binary compounds that show a unique spatial distribution that warrants an electrochemical stability of the interface, serving as an effective passivation layer. Our results explicate the excellent cyclability of LiPON and reconcile the existing debates regarding the stability of the LiPON–Li interface, demonstrating that, though glassy solid electrolytes may not have a perfect initial electrochemical window with Li metal, they may excel in future applications for ASSBs.

Published
2021
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12. Nonequilibrium Synthesis of TiO2 Nanoparticle “Building Blocks” for Crystal Growth by Sequential Attachment in Pulsed Laser Deposition

Author

Mahjouri-Samani, Masoud, primary, Tian, Mengkun, additional, Puretzky, Alexander A., additional, Chi, Miaofang, additional, Wang, Kai, additional, Duscher, Gerd, additional, Rouleau, Christopher M., additional, Eres, Gyula, additional, Yoon, Mina, additional, Lasseter, John, additional, Xiao, Kai, additional, and Geohegan, David B., additional

Published
2017
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24. Nonequilibrium Synthesis of TiO 2 Nanoparticle "Building Blocks" for Crystal Growth by Sequential Attachment in Pulsed Laser Deposition.

Author

Mahjouri-Samani M, Tian M, Puretzky AA, Chi M, Wang K, Duscher G, Rouleau CM, Eres G, Yoon M, Lasseter J, Xiao K, and Geohegan DB

Abstract

Nonequilibrium growth pathways for crystalline nanostructures with metastable phases are demonstrated through the gas-phase formation, attachment, and crystallization of ultrasmall amorphous nanoparticles as building blocks in pulsed laser deposition (PLD). Temporally and spatially resolved gated-intensified charge couple device (ICCD) imaging and ion probe measurements are employed as in situ diagnostics to understand and control the plume expansion conditions for the synthesis of nearly pure fluxes of ultrasmall (∼3 nm) amorphous TiO 2 nanoparticles in background gases and their selective delivery to substrates. These amorphous nanoparticles assemble into loose, mesoporous assemblies on substrates at room temperature but dynamically crystallize by sequential particle attachment at higher substrate temperatures to grow nanostructures with different phases and morphologies. Molecular dynamics calculations are used to simulate and understand the crystallization dynamics. This work demonstrates that nonequilibrium crystallization by particle attachment of metastable ultrasmall nanoscale "building blocks" provides a versatile approach for exploring and controlling the growth of nanoarchitectures with desirable crystalline phases and morphologies.

Published
2017
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