Novel Li-ion battery inks are integral elements to increase mechanical integrity and energy density of 3D printable batteries. Conventional battery inks have been limited to the Polyvinylidene fluoride (PVdF) and N-methyl-2 pyrrolidon (NMP) solvent that are unpleasant of long drying process and environmentally hazard solvent. As a novel Li-ion battery ink for highly energy densified 3D printable batteries, we have developed acrylate-based curable inks which demonstrate fast process, highly cross-linked polymerization and more ecofriend suspension. Here, we report a novel development of curable LIB ink with fundamental studies of rheology, curing behavior and electrochemical performances. The viscosity and activation energy of curable LIB inks are low and shear shinning behavior and 118.9 kJ/mol, respectively, which are appropriate for the extrusion 3D printer with nozzle radius of 0.75 mm and the speed of 5 mm/sec. Furthermore, electrochemical performance of capacity, oxidation peak and cycle retention is comparable to conventionally fabricated electrode.
Yttria-stabilized zirconia (YSZ) nanospheres were synthesized by calcination at 900 °C after the adsorption of Y3+ ions into the pores of a zirconium-based metal–organic framework (MOF). The synthesized 3YSZ (zirconia doped with 3 mol% Y2O3), 8YSZ (8 mol% Y2O3), and 30YSZ (30 mol% Y2O3) nanospheres were found to exhibit uniform sizes and shapes. Complex permittivity and complex permeability were carried out in K-band (i.e., 18–26.5 GHz) to determine their suitability for use as low-k materials in 5G communications. The real and imaginary parts of the permittivity of the sintered 3YSZ were determined to be 21.24 and 0.12, respectively, while those of 8YSZ were 22.80 and 0.16, and those of 30YSZ were 7.16 and 0.38. Control of the real part of the permittivity in the sintered YSZ was facilitated by modifying the Y2O3 content, thereby rendering this material an electronic ceramic with potential for use in high-frequency 5G communications due to its excellent mechanical properties, high chemical resistance, and good thermal stability. In particular, it could be employed as an exterior material for electronic communication products requiring the minimization of information loss.
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