Work

From electrochemical flash sintering (EFS) to high-frequency flash sintering (HF-FS) of ionic conductors

Year: 2026

Type: article

Abstract: The development of all-solid-state electrochemical devices—such as batteries and solid oxide cells—is constrained by conventional high-temperature sintering, which is energy-intensive and limits material compatibility. In this work, we extend and generalize electrochemical flash sintering (EFS) to enable the single-step production of multilayered materials (LVP/LAP/LVP). To address the inherent limitation of flash sintering purely ionic conductors (LATP)—namely, the requirement for reversible electrochemical reactions at the current collector/ceramic interface—we demonstrate that high-frequency (100 kHz) power pulse can trigger the flash event while bypassing interfacial constraints, regardless of electrode type. Experimental results show >92% densification in <10 seconds for LATP using blocking electrodes (Au). By decoupling the flash event from interfacial electrochemistry, this high-frequency flash sintering (HF-FS) approach expands the range of compatible materials and applications, offering a rapid and electrochemically compatible route for fabricating advanced all-solid-state devices.

Source: Electrochimica Acta

DOI: 10.1016/j.electacta.2026.148192

Authors: Timothée Fabre, Franck Fournet-Fayard, Marlu Cesar Steil, Renaud Bouchet

Institutions: Institut polytechnique de Grenoble, Centre National de la Recherche Scientifique, Université Savoie Mont Blanc

Language: English

Topic: Advanced Battery Materials and Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $3,790