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<p>The present study addresses the synthesis of pure and nanocomposite of NaH<sub>2</sub>PO<sub>4</sub>:NdPO<sub>4</sub> with weight ratio of 90:10 (electrolyte (A1) sample) was comprehensive investigated. The pure and nanocomposite prepared by chemical route. The structural, elemental composition, functional groups, porosity, surface morphology, thermal analysis and proton conductivity were rigorously analyzed using a variety of techniques including XRD (X-ray Diffraction), XPS (X-ray Spectroscopy), FTIR (Fourier Transform Infrared Spectrometer), BET (Brunauer Emmett Teller), FE-SEM (Field Emission Scanning electron microscopy), EDS (Energy Dispersive Spectroscopy), TGA (Thermogravimetric analysis), DTA(Differential Thermal analysis) and ionic conductivity by LCR meter of A1 nanocomposite sample. Moreover, the XPS corroborates the XRD findings, with the variations in binding energy explained by bonding states. The deconvoluted C1s spectrum resulting from hydrocarbons showed peaks at 284.6&#xa0;eV and 285.0&#xa0;eV. At 982.44&#xa0;eV and 1005.52&#xa0;eV, there are two types of spin-orbits, representing the Nd <sup>3</sup>d<sub>3/2</sub> and Nd <sup>3</sup>d<sub>5/2</sub> constituents. The obtained results showed that Nd exists in the Nd<sup>3+</sup> oxidation state. FESEM-EDS analysis indicated the presence of atomic percentage that provides the number of an element, reflects the relative weight of an element in the synthesized pure SDP, pure NdPO<sub>4</sub>, and solid acid (A1) nanocomposite electrolyte. TGA-DTA analysis clearly illustrated the dehydration of SDP. In which, TGA curves indicated significant weight reductions surpassing those of pure SDP at 270&#xa0;°C and NdPO<sub>4</sub> at 300&#xa0;°C, and revealed the temporary characteristics of SDP, NdPO<sub>4</sub>, and has a prominent endothermic peak for pure SDP at 275&#xa0;°C. In this work the best conductivity found to be at 6.16 × 10<sup>− 3</sup> S•cm⁻¹at 310&#xa0;°C. Additionally, this study showed that the pre-treatment temperature had a substantial impact on the proton conductivity of electrolyte (A1) sample, which had the highest value, because of NdPO<sub>4</sub>. It has low precursor costs (SDP with NdPO<sub>4</sub>) and easy of synthesis, is an excellent electrolyte for future energy storage applications.</p>

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A novel solid acid nanocomposite of NaH2PO4-NdPO4: synthesis and proton-conducting performance

  • 期刊论文

  • 发表日期：

    2025年11月5日

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  • Pushpanjali Singh,
  • Amit Kumar Sharma,
  • Pawan Kumar

摘要

The present study addresses the synthesis of pure and nanocomposite of NaH2PO4:NdPO4 with weight ratio of 90:10 (electrolyte (A1) sample) was comprehensive investigated. The pure and nanocomposite prepared by chemical route. The structural, elemental composition, functional groups, porosity, surface morphology, thermal analysis and proton conductivity were rigorously analyzed using a variety of techniques including XRD (X-ray Diffraction), XPS (X-ray Spectroscopy), FTIR (Fourier Transform Infrared Spectrometer), BET (Brunauer Emmett Teller), FE-SEM (Field Emission Scanning electron microscopy), EDS (Energy Dispersive Spectroscopy), TGA (Thermogravimetric analysis), DTA(Differential Thermal analysis) and ionic conductivity by LCR meter of A1 nanocomposite sample. Moreover, the XPS corroborates the XRD findings, with the variations in binding energy explained by bonding states. The deconvoluted C1s spectrum resulting from hydrocarbons showed peaks at 284.6 eV and 285.0 eV. At 982.44 eV and 1005.52 eV, there are two types of spin-orbits, representing the Nd 3d3/2 and Nd 3d5/2 constituents. The obtained results showed that Nd exists in the Nd3+ oxidation state. FESEM-EDS analysis indicated the presence of atomic percentage that provides the number of an element, reflects the relative weight of an element in the synthesized pure SDP, pure NdPO4, and solid acid (A1) nanocomposite electrolyte. TGA-DTA analysis clearly illustrated the dehydration of SDP. In which, TGA curves indicated significant weight reductions surpassing those of pure SDP at 270 °C and NdPO4 at 300 °C, and revealed the temporary characteristics of SDP, NdPO4, and has a prominent endothermic peak for pure SDP at 275 °C. In this work the best conductivity found to be at 6.16 × 10− 3 S•cm⁻¹at 310 °C. Additionally, this study showed that the pre-treatment temperature had a substantial impact on the proton conductivity of electrolyte (A1) sample, which had the highest value, because of NdPO4. It has low precursor costs (SDP with NdPO4) and easy of synthesis, is an excellent electrolyte for future energy storage applications.