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<p>The growing energy needs of next generations are driving development of specialized nanostructured electrode materials. Supercapacitors (SC<sub>s</sub>) are extremely effective storage devices that stop environmental damage and use of nonrenewable energy sources. Although carbon-based materials can improve transition metal selenides, their structural instability and easy aggregation during charging and discharging cycles result in low rate capacities and poor cycling stability. In this research, we have prepared NiFe<sub>2</sub>Se<sub>4</sub> and NiFe<sub>2</sub>Se<sub>4</sub>/rGO composite using hydrothermal technique for supercapacitor. Electrochemical investigation of fabricated NiFe<sub>2</sub>Se<sub>4</sub>/rGO composite material displayed capacitance 1046 F/g&#xa0;at 1A/g with energy (E<sub>d</sub>) of 30Wh/kg and power (P<sub>d</sub>) of 227 W/kg<sub>d</sub>. NiFe<sub>2</sub>Se<sub>4</sub>/rGO composite showed stable behaviour after 5000th cycles with a lower <i>R</i>&#xa0;evaluated from Nyquist plot. Addition of rGO in NiFe<sub>2</sub>Se<sub>4</sub> improved the conductivity, cycling stability and kinetics of transfer of the electrons. Moreover, the rGO nanosheets provided larger surface area and volume over NiFe<sub>2</sub>Se<sub>4</sub> nanoparticles which improved electrochemical efficiency of composite substance. The more electrochemical active sites increased interfacial area and less resistance associated with better electrochemical results. Moreover, expectational stability of composite indicated that it has the ability to be used for future energy storing devices.</p>

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Development of NiFe2Se4/rGO composite electrode for enhanced supercapacitive performance

  • 期刊论文

  • 发表日期：

    2025年5月26日

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  • Muhammad Zaman,
  • Samira Elaissi,
  • Tahani Rahil Aldhafeeri,
  • Syed Kashif Ali,
  • Abhinav Kumar

摘要

The growing energy needs of next generations are driving development of specialized nanostructured electrode materials. Supercapacitors (SCs) are extremely effective storage devices that stop environmental damage and use of nonrenewable energy sources. Although carbon-based materials can improve transition metal selenides, their structural instability and easy aggregation during charging and discharging cycles result in low rate capacities and poor cycling stability. In this research, we have prepared NiFe2Se4 and NiFe2Se4/rGO composite using hydrothermal technique for supercapacitor. Electrochemical investigation of fabricated NiFe2Se4/rGO composite material displayed capacitance 1046 F/g at 1A/g with energy (Ed) of 30Wh/kg and power (Pd) of 227 W/kgd. NiFe2Se4/rGO composite showed stable behaviour after 5000th cycles with a lower R evaluated from Nyquist plot. Addition of rGO in NiFe2Se4 improved the conductivity, cycling stability and kinetics of transfer of the electrons. Moreover, the rGO nanosheets provided larger surface area and volume over NiFe2Se4 nanoparticles which improved electrochemical efficiency of composite substance. The more electrochemical active sites increased interfacial area and less resistance associated with better electrochemical results. Moreover, expectational stability of composite indicated that it has the ability to be used for future energy storing devices.