Engineering topics
Meng, Ying Shirley (ORCID:0000000189368845)
Publications and source records attributed to Meng, Ying Shirley (ORCID:0000000189368845).
Operando real-space imaging of a structural phase transformation in the high-voltage electrode LixNi0.5Mn1.5O4
Abstract Discontinuous solid-solid phase transformations play a pivotal role in determining the properties of rechargeable battery electrodes. By leveraging operando Bragg Coherent Diffractive Imaging (BCDI), we investigate the discontinuous phase transformation in Li x Ni 0.5 Mn 1.5 O 4 within an operational Li metal coin cell. Throughout Li-intercalation, we directly observe the nucleation and growth of the Li-rich phase within the initially charged Li-poor phase in a 500 nm particle. Supported by the microelasticity model, the operando imaging unveils an evolution from a curved coherent to a planar semi-coherent interface driven by dislocation dynamics. Our data indicates negligible kinetic limitations from interface propagation impacting the transformation kinetics, even at a discharge rate of C/2 (80 mA/g). This study highlights BCDI’s capability to decode complex operando diffraction data, offering exciting opportunities to study nanoscale phase transformations with various stimuli.
Stabilizing high temperature operation and calendar life of LiNi0.5Mn1.5O4
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Elucidating dynamic conductive state changes in amorphous lithium lanthanum titanate for resistive switching devices
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Leveraging cryogenic electron microscopy for advancing battery design
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High Pressure Effect on Structural and Electrochemical Properties of Anionic Redox-Based Lithium Transition Metal Oxides
Abstract not provided
Metastability and Reversibility of Anionic Redox-Based Cathode for High-Energy Rechargeable Batteries
Not Available