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<p>In this study, α-CoMoO<sub>4</sub> is prepared from β-CoMoO<sub>4</sub> using the piezochromic property which involves a color change from purple to green upon the application of pressure. The prepared material is characterized using XRD, FTIR, Raman spectroscopy, XPS, SEM–EDX, BET, and BJH analyses to elucidate the crystal structure, the functional groups, oxidation states, surface morphology, and elemental composition. The working electrode prepared using α-CoMoO<sub>4</sub> is evaluated in a three-electrode system with 1&#xa0;M KOH as electrolyte to understand the electrochemical performance. The specific capacitance and the capacity of α-CoMoO<sub>4</sub> calculated from GCD curves are 316.5 F/g and 183.6 C/g at 1 A/g current density, respectively. The specific capacitance from the CV at 1&#xa0;mV/s scan rate is 329.4 F/g. The CV curves are used to interpret the quasi-reversible redox reactions at the working electrode–electrolyte interface. The prevalence of diffusion-controlled redox processes in the material is confirmed using power law analysis. The nanoflake structure ensures higher ion interaction at the interfaces of the electrode and electrolyte. The R<sub>ct</sub> after stability is determined to be 21.7 Ω from the EIS analyses. Furthermore, the α-CoMoO<sub>4</sub> working electrode exhibits a stability of 69% with a coulombic efficiency of 95.5% after 6000 charge–discharge cycles.</p>

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Exploring the electrochemical performance of α-CoMoO4 nanoflakes for energy storage applications

  • 期刊论文

  • 发表日期：

    2026年4月26日

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  • V. Maithreyee,
  • C. Karnan

摘要

In this study, α-CoMoO4 is prepared from β-CoMoO4 using the piezochromic property which involves a color change from purple to green upon the application of pressure. The prepared material is characterized using XRD, FTIR, Raman spectroscopy, XPS, SEM–EDX, BET, and BJH analyses to elucidate the crystal structure, the functional groups, oxidation states, surface morphology, and elemental composition. The working electrode prepared using α-CoMoO4 is evaluated in a three-electrode system with 1 M KOH as electrolyte to understand the electrochemical performance. The specific capacitance and the capacity of α-CoMoO4 calculated from GCD curves are 316.5 F/g and 183.6 C/g at 1 A/g current density, respectively. The specific capacitance from the CV at 1 mV/s scan rate is 329.4 F/g. The CV curves are used to interpret the quasi-reversible redox reactions at the working electrode–electrolyte interface. The prevalence of diffusion-controlled redox processes in the material is confirmed using power law analysis. The nanoflake structure ensures higher ion interaction at the interfaces of the electrode and electrolyte. The Rct after stability is determined to be 21.7 Ω from the EIS analyses. Furthermore, the α-CoMoO4 working electrode exhibits a stability of 69% with a coulombic efficiency of 95.5% after 6000 charge–discharge cycles.