This paper presents a comprehensive review on the current state of digital simulation technology and its strategic application usages with a key focus on advanced compression garments. Although three-dimensional (3D) ...
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Centrifugal spinning is a simple and versatile technique for producing nanofibers from various materials. One major application of centrifugal spinning is to produce advanced functional nanofibers for energy storage. ...
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Centrifugal spinning is a simple and versatile technique for producing nanofibers from various materials. One major application of centrifugal spinning is to produce advanced functional nanofibers for energy storage. Among the various existing energy storage technologies, rechargeable lithium-ion batteries have been considered as effective solution to the increasing need for highenergy density electrochemical power sources. Novel centrifugally-spun nanofibers with functional properties can dramatically alter surface reaction rates and charge transport throughout the batteries, causing significant improvement in energy storage efficiency. Here, we present our work on the development of advanced functional nanofibers and the integration of these materials into rechargeable lithium-ion batteries to achieve high system performance.
Research and development in textiles have gone beyond the conventional applications as clothing and furnishing materials;for example, the convergence of textiles, nanotechnologies, and energy science opens up the oppo...
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Research and development in textiles have gone beyond the conventional applications as clothing and furnishing materials;for example, the convergence of textiles, nanotechnologies, and energy science opens up the opportunity to take on one of the major challenges in the 21st century-energy. This presentation addresses the development of high-energy lithium-ion batteries using electrospun nanofibers.
Hematite iron oxide (α-Fe2O3) has received much attention for use as anode material in lithium-ion batteries not only due to its high theoretical capacity but also to its nontoxicity and low cost. However, its practi...
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Hematite iron oxide (α-Fe2O3) has received much attention for use as anode material in lithium-ion batteries not only due to its high theoretical capacity but also to its nontoxicity and low cost. However, its practical applications are limited by its low electrical conductivity as well as the large volume change during Li ion insertion/extraction process. Carbon coated α-Fe2O3 nanofibers were prepared via electrospinning followed by a thermal treatment process in this work, which were used as anode material for lithium-ion batteries. A high reversible capacity of 842 mAh g-1 at a current density of 50 mA g-1 at the 50th cycle was achieved for α-Fe2O3/C nanofibers containing 12.5 wt% carbon. Such excellent electrochemical performance could be attributed to their unique fabric structure and the conductive carbon coating which could shorten Li ion transport distance, improving Li ion reversibility and kinetic properties.
Co3O4/carbon composite nanofibers were prepared by a combination of electrospinning and carbonization methods using 10 - 30 nm and 30 - 50 nm Co3O4 nanoparticles, respectively, and their potential use as the anode mat...
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Many engineering curriculum around the country are re-evaluating their introductory computer programming requirement. At our university, several departments have been changing from the traditional Java or C++ course t...
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A combined method of electrostatic adsorption and green reduction was successfully employed to synthesize graphene-loaded carbon nanofibers (G/CNFs). The graphene nanoflakes enhanced the degree of graphitization of CN...
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Photosensitized reactivity and oxidations are important components of polymer weathering which are greatly influenced by the nature of excited polymer chromophores and the environment. Studying model compounds (MCs) r...
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Photosensitized reactivity and oxidations are important components of polymer weathering which are greatly influenced by the nature of excited polymer chromophores and the environment. Studying model compounds (MCs) representing the bulk of macromolecular systems is an efficient approach to understanding the inherent photophysical and chemical reactivity both practically and theoretically. In this work, MCs representing the class of cyclohexane dimethanol (CHDM) and isophthalic acid modified polyethylene terephthalate polymers have been studied to better understand the bulk weathering properties of these materials. Singlet oxygen sensitization measurements clearly show more than two fold higher 1275nm emission intensity signal for terephthalic acid based MCs compared to iso-phthalic acid based MCs with similar optical density, thus making the terephthalic acid derivatives more prone to photo-hydroperoxidation caused by singlet oxygen. Time resolved studies have provided further proof for the higher reactivity of terephthalic acid based MCs compared to iso-phthalic acid based MCs, mainly due to the dominant triplet state photophysics. Molecular modelling was also employed to predict the possible reactive sites on the MCs.
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