Hybrid CoFe2O4-CNTs-graphene: Synthesis and characterization for energy storage devices

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials Pub Date : 2024-10-24 DOI:10.1016/j.diamond.2024.111698

Krutika L. Routray, Sunirmal Saha

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Abstract

Hybrid materials play a crucial role in a spectrum of energy storage devices. Among them CoFe₂O₄–CNT–graphene hybrid stands out as versatile magnetic materials with wide-ranging applications spanning electronics, magnetism, and sensor industries. In this study, we synthesized CoFe₂O₄–CNT–graphene hybrid utilizing ultrasonication method. This fabrication method resulted in the formation of CoFe₂O₄ nanoparticles, along with bamboo-like carbon nanotubes (CNTs) and graphene nanosheets which collectively establish an open three-dimensional structure. Thorough analyses were conducted on the synthesized nano-composites employing various characterization techniques such as XRD, FT-IR, Raman and FESEM. Further characterization through XPS confirmed the formation of spinel ferrites, detecting the presence of carbon sp², C_1s, carboxylates (O-C-OH), and sp³ carbon, indicating the presence of carbon‑carbon (CC) bonds and confirms the energy levels of Co2p^1/2 and Co2p^3/2 indicating the effective incorporation of CFO onto the CNT/graphene surface. Analysis of dielectric parameters revealed promising characteristics for high-frequency devices, attributed to low dielectric loss, high quality factor, short relaxation time, and diverse responses exhibited by these materials. The M–H loops of the composite samples displayed ferromagnetic hysteresis behavior due to the presence of ferrite in the matrices. The coercivity value shows a slight improvement in the hybrid samples, while saturation magnetization values decrease, indicating a 1:1 weight ratio of ferrite particles to the host matrix with the incorporation of nonmagnetic CNTs and graphene, and the Hc value increases with the addition of these carbon-based materials due to increased surface anisotropy energy. Upon evaluation of dielectric and magnetic properties the hybrid materials demonstrated an enhanced dielectric and magnetic properties which render these materials suitable for utilization across a spectrum of energy storage devices.

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CoFe2O4-CNTs-Graphene 混合材料：用于储能设备的合成与表征

混合材料在各种储能设备中发挥着至关重要的作用。其中，CoFe2O4-CNT-石墨烯杂化物是一种用途广泛的磁性材料，在电子、磁学和传感器行业有着广泛的应用。在这项研究中，我们利用超声波法合成了 CoFe2O4-CNT 石墨烯混合物。这种制备方法形成了 CoFe2O4 纳米颗粒、竹节状碳纳米管（CNT）和石墨烯纳米片，它们共同建立了一个开放的三维结构。利用 XRD、FT-IR、拉曼和 FESEM 等各种表征技术对合成的纳米复合材料进行了全面分析。通过 XPS 进行的进一步表征证实了尖晶铁氧体的形成，检测到碳 sp2、C1s、羧酸盐（O-C-OH）和 sp3 碳的存在，表明存在碳-碳（CC）键，并证实了 Co2p1/2 和 Co2p3/2 的能级，表明 CFO 有效地结合到了 CNT/石墨烯表面。介电参数分析表明，这些材料具有介电损耗低、品质因数高、弛豫时间短和响应多样等特点，有望用于高频器件。由于基体中存在铁氧体，复合样品的 M-H 环显示出铁磁性滞后行为。混合样品的矫顽力值略有提高，而饱和磁化值则有所降低，这表明在加入非磁性 CNT 和石墨烯后，铁氧体颗粒与主基体的重量比为 1:1，并且由于表面各向异性能的增加，Hc 值随着这些碳基材料的加入而增加。在对介电和磁性能进行评估后，混合材料显示出更强的介电和磁性能，使这些材料适合用于各种储能设备。

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来源期刊

Diamond and Related Materials 工程技术-材料科学：综合

CiteScore

6.00

自引率

14.60%

发文量

702

审稿时长

2.1 months

期刊介绍： DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices. The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.