Preparation and characterization of ball milled titanium oxide/multi walled carbon nanotube nanocomposite for supercapacitor applications

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

Diamond and Related Materials Pub Date : 2024-11-14 DOI:10.1016/j.diamond.2024.111787

Hoda EL-Nagar , M.S. Abd El-sadek , Mohamed Khairy , E.M.M. Ibrahim , S. Hampel , Sahar Elnobi

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引用次数: 0

Abstract

In this work, titanium oxide nanoparticles (TiO₂ NPs) and TiO₂-Multi walled carbon nanotubes (MWCNTs) nanocomposites were prepared using the ball milling technique. The characterization of synthesized nanocomposite was done using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectrometer (EDS), Raman spectroscopy, and transmission electron microscopy (TEM). Dielectric constant ε₁ (ω) and dielectric loss ε₂ (ω) were discussed in terms of the dielectric polarization process. The Ac conductivity was increased with increasing MWCNTs amount. The charge carrier transport mechanism was interpreted using the correlated barrier hopping model (CBH). The Impedance spectroscopy showed a non-Debye relaxation in the material. The specific capacitance was increased with increasing MWCNTs concentration. Based on these detailed results, the TiO₂-MWCNTs nanocomposites displayed higher specific capacitance than TiO₂. In addition, the control of the current density applied onto CV measurements and MWCNTs composition of the electrodes to enhance the capacitance will open up a new strategy for the high-performance supercapacitors.

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用于超级电容器的球磨氧化钛/多壁纳米碳管纳米复合材料的制备与表征

本研究采用球磨技术制备了氧化钛纳米颗粒（TiO2 NPs）和 TiO2-多壁碳纳米管（MWCNTs）纳米复合材料。使用 X 射线衍射（XRD）、扫描电子显微镜（SEM）、能量色散 X 射线光谱仪（EDS）、拉曼光谱和透射电子显微镜（TEM）对合成的纳米复合材料进行了表征。介电常数 ε1 (ω) 和介电损耗 ε2 (ω) 根据介电极化过程进行了讨论。随着 MWCNTs 数量的增加，电导率也随之增加。电荷载流子传输机制采用相关势垒跳跃模型（CBH）进行了解释。阻抗光谱显示了材料中的非德拜弛豫。比电容随着 MWCNTs 浓度的增加而增大。基于这些详细结果，TiO2-MWCNTs 纳米复合材料比 TiO2 显示出更高的比电容。此外，通过控制 CV 测量的电流密度和电极中的 MWCNTs 成分来提高电容，将为高性能超级电容器开辟一种新策略。

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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.