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<p>The remarkable structural properties and diverse functional applications have made ferrite a well-recognized material. Due to their magnetic properties, in the past few years these materials have been recognized for their uses in energy storage, catalysis and environmental applications. In our study, we have fabricated Ni-Mg-mixed spinel ferrites i.e., Ni<sub>0.5</sub>Mg<sub>0.5</sub>Ga<sub>x</sub>Fe<sub>2-x</sub>O<sub>4</sub> (<i>x</i> = 0.00. 0.01, 0.02, 0.03) with different dopant content of gallium by sol-gel auto-combustion route. The crystalline nature with Fd3m space geometry is found by XRD. The morphological study showed the nano structured material having grain size distribution in nano-range. With Ga doping, a decrease in energy band is observed from 1.35 to 1.07 eV, whereas the surface area expands from 7.7 to 9.7 m<sup>2</sup>/g. The magnetic study confirms the ferromagnetic behavior of pure and doped Ni-Mg ferrites. The CV analysis showed that the highly doped NM2 sample exhibits the highest capacitance retention at 74% at 80 mV s⁻¹. The GCD study show that the NM2 sample demonstrates the highest capacitance retention rate of 97% at 8 A g⁻¹. Thus, the current research study shows that the mixed spinel ferrites can be highly recommendable candidate for supercapacitor applications.</p>

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Tailoring Ni-Mg spinel ferrites with gallium doping for enhanced supercapacitor applications

  • 期刊论文

  • 发表日期：

    2026年2月5日

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  • Rohit Jasrotia,
  • Anis Ahmad Chaudhary,
  • Anand Somvanshi,
  • Basant Lal,
  • Jyoti Prakash,
  • Hamnesh Mahajan,
  • Suman,
  • Ahmad Rudayni,
  • Karthikeyan Ravi

摘要

The remarkable structural properties and diverse functional applications have made ferrite a well-recognized material. Due to their magnetic properties, in the past few years these materials have been recognized for their uses in energy storage, catalysis and environmental applications. In our study, we have fabricated Ni-Mg-mixed spinel ferrites i.e., Ni0.5Mg0.5GaxFe2-xO4 (x = 0.00. 0.01, 0.02, 0.03) with different dopant content of gallium by sol-gel auto-combustion route. The crystalline nature with Fd3m space geometry is found by XRD. The morphological study showed the nano structured material having grain size distribution in nano-range. With Ga doping, a decrease in energy band is observed from 1.35 to 1.07 eV, whereas the surface area expands from 7.7 to 9.7 m2/g. The magnetic study confirms the ferromagnetic behavior of pure and doped Ni-Mg ferrites. The CV analysis showed that the highly doped NM2 sample exhibits the highest capacitance retention at 74% at 80 mV s⁻¹. The GCD study show that the NM2 sample demonstrates the highest capacitance retention rate of 97% at 8 A g⁻¹. Thus, the current research study shows that the mixed spinel ferrites can be highly recommendable candidate for supercapacitor applications.