POS4-0904
Oxide-Reinforced Gallium-Based Liquid Metal Composites for Structural-Stable Electrodes
Topic
S4. Colloids, Interfaces, and Molecular Assemblies for Functional Soft Materials
When and Where
Oct 1, 2026
08:30 - 09:30
Room 301 (Grand Ballroom)
Session Chairs
Jinkee HONG
Ki Su KIM
Presenter(s)
Da-In Park (Seoul National University of Science and Technology)
Co-Author(s)
Abstract
Gallium-based liquid metals (GaLMs), most notably eutectic gallium-indium alloy (EGaIn) and Galinstan, have attracted considerable attention as emerging soft electrode materials due to their high electrical conductivity, low toxicity, and excellent deformability and processability. Recently, cerium-catalyst-supported GaLM composites have shown promising results as an electrode for electrochemical CO₂ reduction. However, the fabrication of large-area electrodes based on GaLMs remains challenging due to their intrinsically low viscosity and a sharp increase in surface tension upon oxide layer removal under reductive potentials.
In this study, we present a GaLM composite electrode material reinforced with uniformly dispersed filler particles and oxides, which significantly enhances both processability and shape stability. Rheological analysis reveals that the incorporation of these additives modifies the viscoelastic properties of the composite, enabling simple blade coating under ambient conditions. This facilitates the fabrication of large-area liquid metal-based electrode films suitable for CO₂ electroreduction.
Compared to previously reported GaLM electrodes, the fabricated electrodes achieved up to a ~1800 % increase in active surface area, and the fabrication of electrodes with diverse surface patterns was achieved in a facile and controllable manner. Moreover, the resulting films maintained mechanical stability and consistent electrochemical performance under prolonged (24 hrs) and repeated reduction conditions. Notably, solid carbonaceous products were significantly and reliably formed at room temperature. This study proposes a practical and scalable strategy for large-area liquid metal electrode design, offering promising potential for industrial-scale CO₂ conversion applications.
In this study, we present a GaLM composite electrode material reinforced with uniformly dispersed filler particles and oxides, which significantly enhances both processability and shape stability. Rheological analysis reveals that the incorporation of these additives modifies the viscoelastic properties of the composite, enabling simple blade coating under ambient conditions. This facilitates the fabrication of large-area liquid metal-based electrode films suitable for CO₂ electroreduction.
Compared to previously reported GaLM electrodes, the fabricated electrodes achieved up to a ~1800 % increase in active surface area, and the fabrication of electrodes with diverse surface patterns was achieved in a facile and controllable manner. Moreover, the resulting films maintained mechanical stability and consistent electrochemical performance under prolonged (24 hrs) and repeated reduction conditions. Notably, solid carbonaceous products were significantly and reliably formed at room temperature. This study proposes a practical and scalable strategy for large-area liquid metal electrode design, offering promising potential for industrial-scale CO₂ conversion applications.
