Discotic liquid crystals based on triindole, a novel redox active central core, have been synthesized and their mesomorphic behaviour investigated.
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Designing high-performance asymmetric and hybrid energy devices via merging supercapacitive/pseudopcapacitive and Li-ion battery type electrodes.
Sci Rep
November 2024
Department of Physics and Astronomy, Western Kentucky University, Bowling Green, KY, 42101, USA.
We report a strategic development of asymmetric (supercapacitive-pseudocapacitive) and hybrid (supercapacitive/pseudocapacitive-battery) energy device architectures as generation-II electrochemical energy systems. We derived performance-potential estimation regarding the specific power, specific energy, and fast charge-discharge cyclic capability. Among the conceived group, pseudocapacitor-battery hybrid device is constructed with a high-rate intrinsic asymmetric pseudocapacitive (α - MnO/rGO) and a high-capacity Li-ion intercalation battery type (po-nSi/rGO) electrodes.
View Article and Find Full Text PDFA wearable cotton fiber-based supercapacitor electrode material with outstanding stability and photothermal performance utilizing AgNWs, NiCoAl-LDH, and PPy-NWs.
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November 2024
College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an 710021, China; National Demonstration Center for Experimental Light Chemistry Engineering Education (Shaanxi University of Science & Technology), Xi'an 710021, China; Xi'an Key Laboratory of Green Chemicals and Functional Materials (Shaanxi University of Science & Technology), Xi'an 710021, China. Electronic address:
Designing cotton fiber (CF) based flexible electrode materials with both electrochemical energy storage and structural stability is crucial for the utilization of flexible supercapacitors in wearable devices. Nevertheless, the electrochemical properties of such materials are often constrained by suboptimal ion diffusion, a limited electroactive surface area, and inadequate structural integrity. Herein, Silver nanowires (AgNWs), NiCoAl hydrotalcite (NCA-LDH), and polypyrrole nanowires (PPy-NWs) are employed to construct a CF-based electrode material (PNHAS/CF) with high stability through a layer-by-layer self-assembly method.
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Nanoscale Adv
September 2024
Microelectronics Research Unit, University of Oulu Erkki Koiso-Kanttilan katu 3 90570 Oulu Finland.
MoS is a well-known 2D transition metal dichalcogenide (TMD) with feasibility for energy storage applications due to its eco-friendliness and high electroactive surface area. Electrodes based on MoS are typically made by either immobilizing its multiphase nanocomposites, having binders and conductive fillers, or by directly growing the materials on current collectors. In this work, we follow and optimize this latter approach by applying a hydrothermal route to directly synthesize MoS nanostructures on carbon cloth (MoS@CC) hence enabling binder-free current collector electrodes.
View Article and Find Full Text PDFRevitalizing Dead Zinc with Ferrocene/Ferrocenium Redox Chemistry for Deep-Cycle Zinc Metal Batteries.
Angew Chem Int Ed Engl
August 2024
School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, 210094, Nanjing, People's Republic of China.
Aqueous zinc (Zn) batteries are highly desirable for sustainable and large-scale electrochemical energy storage technologies. However, the ceaseless dendrite growth and the derived dead Zn are principally responsible for the capacity decay and insufficient lifespan. Here, we propose a dissolved oxygen-initiated revitalization strategy to reactivate dead Zn via ferrocene redox chemistry, which can be realized by incorporating a trace amount of poly(ethylene glycol) as a solubilizer to improve the solubility of water-insoluble ferrocene derivatives.
View Article and Find Full Text PDFSelf-Exfoliating Benzotristriazine Macrocyclic Network: A New 2D Material for High-Performance Electrochemical Energy Storage.
Small
November 2024
CSIR - National Institute of Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram, Kerala, 695019, India.
Aza-fused aromatic π-conjugated networks are an important class of 2D graphitic analogs, which are generally constructed using aromatic precursors. Herein, the study describes a new synthetic approach and electrochemical properties of a self-exfoliating benzotristriazine 2D network (BTTN) constructed using aliphatic precursors, under relatively mild conditions. The obtained BTTN exhibits a nanodisc-like morphology, the self-exfoliation tendency of which is ascribed to the presence of structurally different macrocycles with high electronic repulsion between the layers.
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