saw modes and acoustic pressure comsol simulation results of the multilayer structure  (COMSOL Inc)

Journal: Nature Communications

Article Title: High-temperature capacitive energy stroage in polymer nanocomposites through nanoconfinement

doi: 10.1038/s41467-024-51052-y

Figure Lengend Snippet: a The model constructed for molecular dynamic simulations featuring PEI polymer wetted by Al 2 O 3 layers (left), and the corresponding diffusion coefficient ( D ) of PEI polymer chains at different positions from the bottom to top Al 2 O 3 surfaces. b The diffusion coefficient of PEI polymer chains as a function of temperature. c Variation of T g for confined PEI with different film thicknesses, the thickness of the Al 2 O 3 layers is fixed at 28 nm. The error bars (±1 °C) represent the inherent error due to the fitting of the data required to obtain T g . d , e Variations of d Young’s modulus and e resistivity for PEI-Al 2 O 3 nanolaminates with different PEI thicknesses at various temperatures, the thickness of the Al 2 O 3 layers is fixed at 28 nm. f Dependency of breakdown strength on PEI film thickness for PEI-Al 2 O 3 nanolaminates at various temperatures, the thickness of the Al 2 O 3 layers is fixed at 28 nm.

Article Snippet: The cross-sectional morphology of multilayer structured nanolaminates was characterized with scanning electron microscopy (JSM-7610FPlus, JEOL, Japan).

Techniques: Construct, Polymer, Diffusion-based Assay

Journal: Nature Communications

Article Title: High-temperature capacitive energy stroage in polymer nanocomposites through nanoconfinement

doi: 10.1038/s41467-024-51052-y

Figure Lengend Snippet: a Cross-section SEM images of nanolaminates with varying layers and interlayer PEI thickness of 10 nm. The pink region represents Al 2 O 3 , and the blue region represents PEI. The scale bar is 50 nm for all. b Leakage current densities of nanolaminates with varying layers as a function of an electric field at 200 °C. c KPFM maps of the normalized contact potential difference (CPD) of nanolaminates with varying layers. From top to bottom, ~30 s, ~1 min, ~2 min, ~3 min, ~4 min, ~5 min, ~7 min, ~9 min, ~11 min after applying a 20 V voltage at the surface of the samples. The scale bar is 1 μm. d Simulated evolution of volume fraction of breakdown phase for different multilayered nanolaminates. e Failure probability of breakdown strength deduced from Weibull distribution for nanolaminates with varying layers at 25, 150, and 200 °C, respectively.

Article Snippet: The cross-sectional morphology of multilayer structured nanolaminates was characterized with scanning electron microscopy (JSM-7610FPlus, JEOL, Japan).

Techniques:

Journal: Nature Communications

Article Title: High-temperature capacitive energy stroage in polymer nanocomposites through nanoconfinement

doi: 10.1038/s41467-024-51052-y

Figure Lengend Snippet: a Discharged energy density and efficiency of nanolaminates with varying layers at temperatures of 150, 200, and 250 °C. b Comparison of maximum discharged energy density achieved at above 90% efficiency in this work and previously reported values at different temperatures. c Cyclic stability of energy density and energy efficiency for 7-layered nanolaminate under 700 kV/mm at various temperatures.

Article Snippet: The cross-sectional morphology of multilayer structured nanolaminates was characterized with scanning electron microscopy (JSM-7610FPlus, JEOL, Japan).

Techniques: Comparison