Enhanced Electrochemical Performance of γ-Fe2O3/Cr2O3/Graphene Oxide/Sodium Alginate Hybrid Nanocomposite Aerogels for High-Efficiency Ultracapacitors
This study looks at how to manufacture cost-effective, sustainable, and high-performance energy storage materials. Although there has been significant development in graphene oxide-based materials, challenges such as the accumulation of graphene sheets, weak cycling stability, and insufficient pseud...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2025-01-01
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| Series: | Journal of Nanotechnology |
| Online Access: | http://dx.doi.org/10.1155/jnt/8176379 |
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| Summary: | This study looks at how to manufacture cost-effective, sustainable, and high-performance energy storage materials. Although there has been significant development in graphene oxide-based materials, challenges such as the accumulation of graphene sheets, weak cycling stability, and insufficient pseudocapacitive contributions reduce their efficiency, so this work looks to ride these challenges by manufacturing a stable, high-capacity, and environmentally friendly hybrid quaternary nanocomposite γ-Fe2O3/Cr2O3/GO/SA aerogel by using the inexpensive sonication method. The structural and morphological characterization of this hybrid nanocomposite was done using different techniques such as x-ray diffraction, field emission scanning electron, energy dispersive spectroscopy, and Raman spectroscopy technique. The capacitive performance was determined using a three-electrode system workstation. This hybrid nanocomposite achieved an excellent specific capacity of 1032 F.g−1 at a current density of 1 mA.g−1, along with a good energy density of 430 Wh.kg−1 and a power density of 9110 W.kg−1, and this means it achieved about a 2.5 times improvement more than traditional GO-based materials. These impressive results belong to the excellent surface area of the γ-Fe2O3/Cr2O3/GO/SA hybrid aerogel, provided by adding two types of semiconductors (γ-Fe2O3 and Cr2O3), which reduces the graphene oxide sheets agglomeration. Furthermore, they also have a multioxidation state that makes them suitable for redox reactions, which leads to the addition of a pseudocapacitive to the overall capacitance. The hybrid nanocomposite also appears to have impressive cycling stability and a high coulombic efficiency of up to 98% after 7000 cycles, making it suitable for energy storage devices. |
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| ISSN: | 1687-9511 |