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<p>In recent times, there has been a rising interest in utilizing alkaline earth metals for energy storage applications. Thin films of Ba(OH)<sub>2</sub> were deposited on stainless steel (SS) using the successive ionic layer adsorption and reaction (SILAR) method. The characterization of prepared films was carried out through X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photo-electron spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM) and atomic force microscopy (AFM). The surface study of Ba(OH)<sub>2</sub> thin film on SS reveals the polianthes tuberosa morphology. The electrochemical properties of the prepared electrodes were examined using cyclic voltammetry (CV) in a 1&#xa0;M Na<sub>2</sub>SO<sub>4</sub> electrolyte solution. The electrode exhibited a maximum specific capacity (<InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10854_2025_14525_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="18" /> </InlineMediaObject> <EquationSource Format="TEX">\({C}_{\text{s}}\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>C</mi> <mtext>s</mtext> </msub> </math></EquationSource> </InlineEquation>) of 402.8&#xa0;C&#xa0;g<sup>−1</sup> at a current rate of 0.5&#xa0;mA for 2&#xa0;V potential window, having cyclic stability with a retention of 63.5% after 1000 CV cycles. This electrode demonstrated energy density of 112&#xa0;Wh&#xa0;Kg<sup>−1</sup> and a power density of 3400&#xa0;W&#xa0;Kg<sup>−1</sup> at a current rate of 0.5&#xa0;mA. Furthermore, a solid-state symmetric supercapacitor device has been fabricated. The device exhibits energy and power densities of 0.32&#xa0;Wh&#xa0;Kg<sup>−1</sup> and 251.08&#xa0;W&#xa0;Kg<sup>−1</sup>, respectively. The practical applicability of the device has been shown by illuminating blue-, green-, red- and white-coloured light emission diodes (LEDs) and flexibility test at different angles. These findings suggest the potential of Ba(OH)<sub>2</sub> thin films, deposited via SILAR, as promising materials for supercapacitive energy storage applications.</p>

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Binder-free tuberosa architectured barium hydroxide thin film for supercapacitor application

  • 期刊论文

  • 发表日期：

    2025年3月20日

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  • Abhishek Kumar Sahu,
  • S. N. Pandey

摘要

In recent times, there has been a rising interest in utilizing alkaline earth metals for energy storage applications. Thin films of Ba(OH)2 were deposited on stainless steel (SS) using the successive ionic layer adsorption and reaction (SILAR) method. The characterization of prepared films was carried out through X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photo-electron spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM) and atomic force microscopy (AFM). The surface study of Ba(OH)2 thin film on SS reveals the polianthes tuberosa morphology. The electrochemical properties of the prepared electrodes were examined using cyclic voltammetry (CV) in a 1 M Na2SO4 electrolyte solution. The electrode exhibited a maximum specific capacity ( \({C}_{\text{s}}\) C s ) of 402.8 C g−1 at a current rate of 0.5 mA for 2 V potential window, having cyclic stability with a retention of 63.5% after 1000 CV cycles. This electrode demonstrated energy density of 112 Wh Kg−1 and a power density of 3400 W Kg−1 at a current rate of 0.5 mA. Furthermore, a solid-state symmetric supercapacitor device has been fabricated. The device exhibits energy and power densities of 0.32 Wh Kg−1 and 251.08 W Kg−1, respectively. The practical applicability of the device has been shown by illuminating blue-, green-, red- and white-coloured light emission diodes (LEDs) and flexibility test at different angles. These findings suggest the potential of Ba(OH)2 thin films, deposited via SILAR, as promising materials for supercapacitive energy storage applications.