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With an escalating global energy shortage and increasing environmental concerns, the urgency for efficient renewable energy storage solutions is paramount. Layered Double Hydroxides (LDHs), especially NiCo-LDHs, hold promise due to their excellent electrochemical performance and environmental compatibility. Investigating synthesis methods—hydrothermal, reflux and coprecipitation—reveals varying control over crystallinity and morphology, impacting the LDHs’ properties. Experimental synthesis, characterization, and electrochemical analysis were conducted for hydrothermal and reflux methods, with results showing that hydrothermal synthesis with a 3:2 Ni:Co ratio, using CTAB and methanol, produced NiCo-LDH with the highest specific capacitance (3.881 F/g). Each synthesis method showed nuanced effects on LDH properties, correlating crystallinity with improved charge storage capabilities. Structural tuning through additives facilitated controlled crystalline growth, impacting electrochemical performance. The impact of additives—CTAB, methanol, oxalic acid, ammonium nitrate, and urea—on LDH properties was dissected. The study underscores the nuanced effects of various additives and precursors on LDH properties, emphasising the role of crystallinity in enhancing charge storage capabilities. CTAB and methanol were found crucial in augmenting surface area and facilitating controlled crystalline formation. Key parameters such as energy density and specific capacitance were correlated with synthesis methods, highlighting the vital role of synthesis parameters in defining LDH performance. These findings offer insights into optimising synthesis parameters for tailored LDH structures, crucial for efficient energy storage materials.

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Comparative Analysis of Synthesis Methods for Maximising Supercapacitive Performance in NiCo-Layered Double Hydroxides

  • 会议论文

  • 发表日期：

    2025年

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  • Lokesh Vairakannu,
  • Ting Hui Ng,
  • Song Xinpeng Charles

摘要

With an escalating global energy shortage and increasing environmental concerns, the urgency for efficient renewable energy storage solutions is paramount. Layered Double Hydroxides (LDHs), especially NiCo-LDHs, hold promise due to their excellent electrochemical performance and environmental compatibility. Investigating synthesis methods—hydrothermal, reflux and coprecipitation—reveals varying control over crystallinity and morphology, impacting the LDHs’ properties. Experimental synthesis, characterization, and electrochemical analysis were conducted for hydrothermal and reflux methods, with results showing that hydrothermal synthesis with a 3:2 Ni:Co ratio, using CTAB and methanol, produced NiCo-LDH with the highest specific capacitance (3.881 F/g). Each synthesis method showed nuanced effects on LDH properties, correlating crystallinity with improved charge storage capabilities. Structural tuning through additives facilitated controlled crystalline growth, impacting electrochemical performance. The impact of additives—CTAB, methanol, oxalic acid, ammonium nitrate, and urea—on LDH properties was dissected. The study underscores the nuanced effects of various additives and precursors on LDH properties, emphasising the role of crystallinity in enhancing charge storage capabilities. CTAB and methanol were found crucial in augmenting surface area and facilitating controlled crystalline formation. Key parameters such as energy density and specific capacitance were correlated with synthesis methods, highlighting the vital role of synthesis parameters in defining LDH performance. These findings offer insights into optimising synthesis parameters for tailored LDH structures, crucial for efficient energy storage materials.