基于 Co3O4/rGO 的纳米复合材料结构作为先进储能电极及其伪电容特性

IF 4.3 3区 材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS
Jahanzaib Mughal , Hussain Ahmad , Ammar Tariq , Muhammad Mitee Ullah , Umar Draz , Shahid M. Ramay , Shahid Atiq
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引用次数: 0

摘要

为应对不断升级的全球储能挑战,本研究着手探索电化学性能良好的 Co3O4 复合材料,并将其与不同浓度的还原氧化石墨烯(5%、10% 和 15%)完美结合。采用单步水热法合成 Co3O4,然后通过溶解热工艺制备 Co3O4/rGO 复合材料。然后将这些复合材料应用到镍泡沫中以制造电极。使用 X 射线衍射仪分析了这些新型 Co3O4/rGO/NF 电极的结构特性,结果表明 Co3O4 具有独特的晶体结构,并且在引入 rGO 后没有发生相变。通过场发射电子显微镜和透射电子显微镜进行的形态分析表明,电极具有层状结构,孔隙率随 rGO 浓度的增加而增加。通过循环伏安法对电化学性能进行了严格测试,验证了样品的假电容特性。此外,电静态充放电研究表明,含有 15% rGO 的电极在 1.7 Ag-1 的条件下显示出最高的电容(Cs = 1360 Fg-1),5000 次循环后的循环保持率为 86%。电化学阻抗光谱进一步证明了这些电极具有卓越的导电性,凸显了它们在超级电容器应用方面的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Co3O4/rGO based nanocomposite architectures as electrodes for advanced energy storage and their pseudocapacitive attributes

Co3O4/rGO based nanocomposite architectures as electrodes for advanced energy storage and their pseudocapacitive attributes
In response to escalating global challenges in energy storage, this study embarked on captivating exploration of electrochemically proficient Co3O4 composites, seamlessly integrated with varying concentrations of reduced graphene oxide (5 %, 10 %, and 15 %). Using a single-step hydrothermal method, Co3O4 was synthesized, followed by a solvothermal process to produce Co3O4/rGO composites. These composites were then applied to Nickel Foam to fabricate electrodes. The structural properties of these novel Co3O4/rGO/NF electrodes were analyzed using X-ray Diffractometer, which confirmed the distinctive crystalline structure of Co3O4 and indicated no phase transformation after the introduction of rGO. Morphological analysis through a Field Emission Electron Microscope and Transmission Electron Microscope revealed layered structures and increasing porosity correlated with higher rGO concentrations. Electrochemical performance was rigorously tested through cyclic voltammetry, which verified the pseudocapacitive attributes of the samples. Additionally, galvanostatic charge-discharge studies highlighted that the electrode containing 15 % rGO demonstrated highest (Cs = 1360 Fg−1) at 1.7 Ag−1, with 86 % of cyclic retention after 5000 cycles. Electrochemical impedance spectroscopy further demonstrated superior conductivity, underscoring the potential of these electrodes'for supercapacitor applications.
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来源期刊
Diamond and Related Materials
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.
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