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D'Arrigo, Maria Cristina; Siligardi, Cristina; Leonelli, Cristina; So, J.Y.; Kim, Hyung Sun

doi:10.1023/a:1021665231941

Cited by 11 publications

(1 citation statement)

References 8 publications

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“…There are several fast sintering techniques with direct heating mechanisms, such as spark plasma sintering, − flash sintering, , and microwave-assisted sintering, − which apply a pulsed current, an electric field to the material as energy sources, respectively. Among these, microwave-assisted sintering induces dielectric heating, which includes bipolar rotation and resistive heating in the cermaic material with homogeneous and fast heat transfer rates (∼50 °C/min). , Furthermore, a high heating rate can refine the microstructure of sintered materials by bypassing the surface diffusion region, which mainly causes the particle coarsening during ramping up to the sintering temperature. , In this regard, the microwave-assisted sintering has been investigated for the manufacture of various ceramic materials, including glass ceramics, bioceramics, , and electroceramics. , Recently, our preliminarly research demonstrated that yttria-stabilized zirconia (YSZ)-based solid oxide fuel cells (SOFCs) could be successfully fabricated using a microwave-assisted sintering process in 10 min at 1400 °C, which is much faster than the conventional sintering process (3 h at 1400 °C) . Inspired by previous research, we aimed to manufacture the multilayered PCECs sintered within a few minutes using a microwave-assissted sintering process.…”

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High-Performance Protonic Ceramic Electrochemical Cells

et al. 2022

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Protonic ceramic electrochemical cells (PCECs) have attracted considerable attention owing to their ability to reversibly convert chemical fuels into electricity at low temperatures below 600 °C. However, extreme sintering conditions during conventional convectionbased heating induce critical problems for PCECs such as nonstoichiometric electrolytes and microstructural coarsening of the electrodes, leading to performance deterioration. Therefore, we fabricated PCECs via a microwave-assisted sintering process (MW-PCEC). Owing to the ultrafast ramping rate (∼50 °C/min) with bipolar rotation and the resistive heating nature of microwave-assisted sintering, undesirable cation diffusion and grain growth were effectively suppressed, thus producing PCECs with stoichiometric electrolytes and nanostructured fuel electrodes. The MW-PCEC achieved electrochemical performance in both in fuel cell (0.85 W cm −2 ) and in electrolysis cell (1.88 A cm −2 ) modes at 600 °C (70% and 254% higher than the conventionally sintered PCEC, respectively) demonstrating the effectiveness of using an ultrafast sintering technique to fabricate high-performance PCECs.

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