Le Hong Quan , Nguyen Cong Minh , Tran Ngoc Le , Nguyen Huu Nghia , Tran Quang Ngoc , Nguyen Van Tang , Bui Thuc Minh , Nguyen Van Hoa
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引用次数: 0
Abstract
The conversion of biomass into valuable carbon materials reduces environmental pollution and develops effective porous carbon electrodes for energy storage devices. This study aims to prepare a novel composite material consisting of NiCo2S4 and chitosan-derived carbon (CNNA) for use in high-performance supercapacitors. The prepared CNNA composite exhibited a high specific surface area of more than 27 m2/g. The CNNA electrode delivered a high specific capacitance of 1282 F.g−1 at 1.0 A.g−1, significantly surpassing that of bare NiCo2S4 (340 F.g−1) under the same conditions. Electrochemical analysis revealed that the charge storage behavior involved both capacitive and diffusion-controlled contributions, with the capacitive contribution increasing at higher scan rates. Furthermore, a solid-state asymmetric supercapacitor (ACCS//CNNA) was assembled using CNNA as the positive electrode and chitosan-derived carbon aerogel (ACCS) as the negative electrode. The device achieved a specific capacitance of 199 F.g−1, an energy density of 62 Wh.kg−1, and a power density of 750 W.kg−1, and retained 90.9 % of its initial capacitance after 10,000 charge–discharge cycles. These results clearly demonstrate the synergistic effect of NiCo2S4 and N-doped carbon aerogel, highlighting the potential of CNNA as a sustainable and efficient electrode material. Using chitosan in NiCo2S4/carbon composites offers advantages, including nitrogen self-doping, the formation of a uniform nanostructure, and enhanced electrochemical performance compared to composites made from other biomass sources.
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.