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Abstract <p>This work presents an optimized bead-milling approach for producing monodisperse cesium dihydrogen phosphate nanoparticles (100–200 nm), while preserving their <i>P</i>2<sub>1</sub>/<i>m</i> crystal structure, as confirmed by X-ray diffraction and particle size characterized by scanning electron microscopy and Rietveld refinement (125 ± 10 nm crystallites). The obtained nanoparticles demonstrated high proton conductivity (∼1.8 × 10<sup>–2</sup> S cm<sup>–1</sup> at 240°C) due to the bulk transport mechanism predominance, which allowed them to be successfully applied in the first tests in fuel cell electrodes (OCV 0.96 V, current density ∼120 mA/cm<sup>2</sup> at 235°C). The developed mechanical processing method enables precise particle size control, facilitating the fabrication of electrode materials with enhanced three-phase boundary characteristics for improved fuel cell performance.</p>

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Synthesis of Nanoscale Cesium Dihydrogen Phosphate Particles via Bead Milling for Advanced Electrode Composites

  • 期刊论文

  • 发表日期：

    2025年4月1日

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  • D. O. Dormidonova,
  • I. N. Bagryantseva,
  • V. G. Ponomareva,
  • B. B. Bokhonov

摘要

Abstract

This work presents an optimized bead-milling approach for producing monodisperse cesium dihydrogen phosphate nanoparticles (100–200 nm), while preserving their P21/m crystal structure, as confirmed by X-ray diffraction and particle size characterized by scanning electron microscopy and Rietveld refinement (125 ± 10 nm crystallites). The obtained nanoparticles demonstrated high proton conductivity (∼1.8 × 10–2 S cm–1 at 240°C) due to the bulk transport mechanism predominance, which allowed them to be successfully applied in the first tests in fuel cell electrodes (OCV 0.96 V, current density ∼120 mA/cm2 at 235°C). The developed mechanical processing method enables precise particle size control, facilitating the fabrication of electrode materials with enhanced three-phase boundary characteristics for improved fuel cell performance.