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<p>Nowadays energy and environment have become major topics in the whole world. The exploitation and utilization of new energy, including wind and solar energy, is attracting more attention. However, due to the variability of wind and solar power, energy storage becomes especially important for the efficient utilization of new energy. Electrochemical energy storage systems are a more promising way to store new energy. While the supercapacitors are rapidly improving but still face cost, safety and long duration storage issues. Current commercial technologies are unlikely to satisfy full range and scale of future grid level energy storage requirements. To tackle this issue, it is urgent to seek new materials with better performance for the energy storage system. A new family of Two-dimensional materials called MXene (2D transition metal carbides/nitrides) has shown a great potential for energy storage. MXenes are layered structures modified by etching. The layered structure is marred by the by-default addition of ions in between desired layers. The problem of the additional ions can be overcome by synthesis the MXene directly. Hence, in this research, we are opting to obtain MXene free from undesired ions by switching to the physical vapor deposition technique followed by heat treatment and pack carburization. The SEM and XRD reveal the presence of MXene. The cyclic voltammetry, EIS, and Galvanic charge- discharge results depict that the sample has better energy and power density and make it suitable material for supercapacitor. The specific capacitance and energy density from the GCD curve for the CCA sample was 185.3&#xa0;F/g and 6.41 Wh/kg at the current density of 700&#xa0;mA/g respectively.</p>

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Direct synthesis of ion free MXene via physical vapour deposition for high performance supercapacitor electrodes

  • 期刊论文

  • 发表日期：

    2026年5月11日

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  • Ahmed Usman Yasir,
  • Muhammad Arslan,
  • Muhammad Zubair Farrukh

摘要

Nowadays energy and environment have become major topics in the whole world. The exploitation and utilization of new energy, including wind and solar energy, is attracting more attention. However, due to the variability of wind and solar power, energy storage becomes especially important for the efficient utilization of new energy. Electrochemical energy storage systems are a more promising way to store new energy. While the supercapacitors are rapidly improving but still face cost, safety and long duration storage issues. Current commercial technologies are unlikely to satisfy full range and scale of future grid level energy storage requirements. To tackle this issue, it is urgent to seek new materials with better performance for the energy storage system. A new family of Two-dimensional materials called MXene (2D transition metal carbides/nitrides) has shown a great potential for energy storage. MXenes are layered structures modified by etching. The layered structure is marred by the by-default addition of ions in between desired layers. The problem of the additional ions can be overcome by synthesis the MXene directly. Hence, in this research, we are opting to obtain MXene free from undesired ions by switching to the physical vapor deposition technique followed by heat treatment and pack carburization. The SEM and XRD reveal the presence of MXene. The cyclic voltammetry, EIS, and Galvanic charge- discharge results depict that the sample has better energy and power density and make it suitable material for supercapacitor. The specific capacitance and energy density from the GCD curve for the CCA sample was 185.3 F/g and 6.41 Wh/kg at the current density of 700 mA/g respectively.