Facile synthesis of reduced graphene oxide nanosheet modified NiMn-LDH nanoflake arrays as a novel electrode for asymmetric supercapacitor

IF 4.3 3区 材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS Diamond and Related Materials Pub Date : 2024-11-28 DOI:10.1016/j.diamond.2024.111833
P. Priyadharshini, G. Mahalakshmi
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Abstract

Composite electrodes that possess both appropriate integration and reasonable structures are needed to provide eminent electrochemical performance in energy storage devices. At this work, an innovative electrode material with a composite structure of NiMn-LDH nanosheets fixed on the reduced graphene oxide/Ni Foam (rGO/NF) was fabricated by a convenient two-step hydrothermal process. Designing the heterostructure with the hydrothermal reaction to grow LDH layers has engineered NiMn LDH/rGO, a highly active towards the electrochemical performance. The formation of hybrid structure is characterized using X-ray diffraction, and scanning electron microscopy, which confirmed as well as showed the uniform growth of NiMn-LDH nanoflakes on rGO sheets. The intriguing compositional/componential advantages significantly facilitate the efficient penetration of the electrolytes and increase active sites of redox reactions in energy storage application. The NiMn LDH/rGO composite exhibited the highest specific capacitty of 1090 Cg−1 at 1 Ag−1 with an excellent cyclic stability of 92.2 % over 10,000 charging and discharging cycles at 20 Ag−1. An asymmetric supercapacitor (ASC) with NiMn LDH/rGO//activated carbon (AC) demonstrates a remarkable capacity of 330.5 Cg−1 at 1 Ag−1 with excellent cycling stability. Moreover, the device achieving a high energy density of 45.8 Whkg−1 at 623 Wkg−1 and favourable cycle life, where 98.3 % of the capacitance was retained after 10,000 cycles. The coupling and synergistic effects of NiMn LDH and rGO provide a convenient channel for the electrochemical process, which is beneficial to spread widely within the realm of electrochemical energy storage.

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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.
期刊最新文献
Editorial Board Outside Front Cover - Journal name, Cover image, Volume issue details, ISSN, Cover Date, Elsevier Logo and Society Logo if required Bio-derived graphitic carbon microspheres: A green approach for high-frequency microwave absorption Facile synthesis of reduced graphene oxide nanosheet modified NiMn-LDH nanoflake arrays as a novel electrode for asymmetric supercapacitor Rapid synthesis of nitrogen-doped carbon dots by microwave method for sensitive detection of co(II) in water environment
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