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<p>Almond gum polysaccharide (AGP) was utilized to synthesize proton exchange membranes (PEMs) by doping different combinations of ammonium formate. The membranes were developed using the solution casting technique. The prepared membranes were analyzed for their structural, electrochemical, and transport properties using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), AC impedance spectroscopy, and transport number analysis. The XRD study demonstrated that the membranes became more amorphous when ammonium formate was added. Additionally, FTIR spectroscopy showed that there was a complexation between the AGP biopolymer matrix and the dopant. The AGP in its pure form had a conductivity of 4.23 × 10<sup>−9</sup> Scm<sup>−1</sup>. Nevertheless, when doped with ammonium formate at a concentration of 0.4 wt%, the conductivity experienced a significant increase of four orders of magnitude. This resulted in a maximum conductivity value of 1.03 × 10<sup>−4</sup> Scm<sup>−1</sup> for the composition consisting of 1&#xa0;g AGP and 0.4 wt% ammonium formate. The overall ionic transport number of the biopolymer electrolyte system was determined using transport number analysis. Finally, a primary proton battery was effectively constructed using the highest conducting membrane, which shows an OCV of 1.35&#xa0;V, and discharge through 1 MΩ was performed. This exhibits the potential use of AGP-based biopolymer electrolytes in electrochemical devices.</p>

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Investigating the effectiveness of NH4HCO2 in Prunus dulcis-derived almond gum polysaccharide for proton transport

  • 期刊论文

  • 发表日期：

    2025年2月27日

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  • M. Premalatha,
  • K. Venkatesh,
  • S. Monisha,
  • B. Archana,
  • S. Selvalaskshmi,
  • V. Moniha,
  • D. Vinoth Pandi

摘要

Almond gum polysaccharide (AGP) was utilized to synthesize proton exchange membranes (PEMs) by doping different combinations of ammonium formate. The membranes were developed using the solution casting technique. The prepared membranes were analyzed for their structural, electrochemical, and transport properties using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), AC impedance spectroscopy, and transport number analysis. The XRD study demonstrated that the membranes became more amorphous when ammonium formate was added. Additionally, FTIR spectroscopy showed that there was a complexation between the AGP biopolymer matrix and the dopant. The AGP in its pure form had a conductivity of 4.23 × 10−9 Scm−1. Nevertheless, when doped with ammonium formate at a concentration of 0.4 wt%, the conductivity experienced a significant increase of four orders of magnitude. This resulted in a maximum conductivity value of 1.03 × 10−4 Scm−1 for the composition consisting of 1 g AGP and 0.4 wt% ammonium formate. The overall ionic transport number of the biopolymer electrolyte system was determined using transport number analysis. Finally, a primary proton battery was effectively constructed using the highest conducting membrane, which shows an OCV of 1.35 V, and discharge through 1 MΩ was performed. This exhibits the potential use of AGP-based biopolymer electrolytes in electrochemical devices.