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Nanosized [email protected] , [email protected] @CNF and [email protected] @C composites via chemical vapour deposition method for use in advanced lithium-ion batteries

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Journal of Power Sources 2014年 253卷 366-372页

作者： Shuli Li Chen Chen Kun Fu Ryan White Chengxin Zhao Philip D. Bradford Xiangwu Zhang Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University Raleigh NC 27695-8301 USA Department of Materials Science and Engineering North Carolina State University Raleigh NC 27695-8301 USA Department of Physics University of Oslo Oslo 0316 Norway

Three distinct Ge nanoparticle-filled carbon nanofiber (CNF) composites, [email protected] , [email protected] @CNF and [email protected] @C, were fabricated by chemical vapor deposition (CVD) and electrospinning techniques. These different structures were prepared by: 1) dispersing Ge nanoparticles into CNF, 2) adding carbon-coated Ge nanoparticles ( [email protected] ) prepared by CVD into CNF, and 3) depositing CVD carbon onto [email protected] , respectively. Compared with the [email protected] composite, both [email protected] @CNF and [email protected] @C had additional amorphous carbon coating fabricated by the CVD method. The three composites were studied as binder-free electrodes for rechargeable lithium-ion batteries. Raw Ge anode materials suffered from serious volume changes and nanoparticle aggregations during cycling, resulting in pulverization and capacity loss. However, carbon nanofiber and the supplemental CVD carbon layer in these nanofiber composites could help preserve the structural integrity of the alloy anode materials during repeated cycling, and consequently, lead to improved cycling stability. In this work, it was found that among the three composites, [email protected] @C exhibited the highest capacity retention of 89% at the 50th cycle due to the structurally-durable thorn-like Ge morphology and the additional CVD carbon confinement. [email protected] and [email protected] @CNF encountered rapid capacity loss because large Ge clusters were formed and jeopardized the integrity of the electrode structure during cycling.

关键词： Lithium alloy Germanium Chemical vapor deposition Electrospinning Lithium-ion battery

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Effects of needle-punch rate on properties of PET/Kevlar/LPET nonwoven geotextiles 4

Effects of needle-punch rate on properties of PET/Kevlar/LPE...

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4th International Workshop on Computer science and engineering-Winter, WCSE 2014

作者： Lin, Jia-Horng Li, Jia-Hsun Hsieh, Jing-Chzi Hsing, Wen-Hao Lou, Ching-Wen Laboratory of Fiber Application and Manufacturing Department of Fiber and Composite Materials Feng Chia University Taichung City40724 Taiwan School of Chinese Medicine China Medical University Taichung40402 Taiwan Department of Fashion Design Asia University Taichung41354 Taiwan Department of Ph. D Program in Civil and Hydraulic Engineering Feng Chia University Taichung City40724 Taiwan Department of Land Management Feng Chia University Taichung City40724 Taiwan Department of Textile Engineering Chinese Culture University Taipei11114 Taiwan Institute of Biomedical Engineering and Materials Science Central Taiwan University of Science and Technology Taichung40601 Taiwan

Geotextiles feature reinforcement, drainage, filtration, separation, and act as a moisture barrier, and are commonly used in civil and geotechnical engineering applications. Using nonwoven fabrics as geotextiles has become a recent trend;therefore, this study combines crimped polyester (PET) fibers, recycled Kevlar unidirectional selvage fibers, and low-melting-point PET (LPET) fiber to make PET/Kevlar/LPET nonwoven geotextiles, the mechanical properties of which are then examined. The test results show that the tensile strength and tearing strength of the PET/Kevlar/LPET nonwoven geotextiles increases as a result of an increasing needle-punch rate from 150 punches/min to 200 punches/min. The mechanical properties along the cross machine direciton (CD) of the nonwoven geotextiles is greater than that along the machine direction (MD). When the needle-punching rate exceeds 200 punches/min, the mechanical properties of the nonwoven geotextiles slightly decrease.

关键词： Needles

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Effects of Needle-Punch Depth on Properties of PET/LPET/Kevlar Nonwoven Geotextiles

Effects of Needle-Punch Depth on Properties of PET/LPET/Kevl...

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2nd International Conference on Advanced Composite Materials and Manufacturing engineering, CMME 2014

作者： Lin, Jia Horng Hsieh, Jing Chzi Li, Jia Hsun Hsing, Wen Hao Lou, Ching Wen Laboratory of Fiber Application and Manufacturing Department of Fiber and Composite Materials Feng Chia University Taichung City 40724 Taiwan School of Chinese Medicine China Medical University Taichung 40402 Taiwan Department of Fashion Design Asia University Taichung 41354 Taiwan Department of Land Management Feng Chia University Taichung City 40724 Taiwan Department of Ph. D Program in Civil and Hydraulic Engineering Feng Chia University Taichung City 40724 Taiwan The Department of Textile Engineering Chinese Culture University Taipei 11114 Taiwan Institute of Biomedical Engineering and Materials Science Central Taiwan University of Science and Technology Taichung 40601 Taiwan

ISBN: (纸本)9783038350651

Geotextile has been commonly used in civil and geotechnical engineering applications, and the majority of geotextiles is made of nonwoven fabrics. Therefore, this study combines crimped polyester (PET) fibers, recycled Kevlar unidirectional selvage fibers, and low-melting-point PET (LPET) fibers to form PET/Kevlar/LPET nonwoven geotextiles, and then examines how various neelde-punch depths influence mechanical properties of the resulting nonwoven geotextiles. The tensile strength, tearing strength, bursting strength, and static puncture resistance of the nonwoven fabrics increase as a result of an increase of 0.3 cm to 0.5 cm in needle-punch depth. However, an increase of 0.5 cm to 0.7 cm causes a slight decrease in all aforementioned properties. © (2014) Trans Tech Publications, Switzerland.

关键词： Needles

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Co3O4/carbon composite nanofibers for use as anode material in advanced lithium-ion batteries

Co3O4/carbon composite nanofibers for use as anode material ...

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作者： Li, Shuli Fu, Kun Xue, Leigang Toprakci, Ozan Li, Ying Zhang, Shu Xu, Guanjie Lu, Yao Zhang, Xiangwu Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University Raleigh NC 27695-8301 United States

ISBN: (纸本)9780841228139

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 material in rechargeable lithium-ion batteries was investigated. The composite Co3O4/carbon nanofiber electrode containing 30 - 50 nm Co3O4 nanoparticles showed large reversible capacities and good cycleability with charge capacities of 677 and 545 mAh g-1 at the second and twentieth cycles, respectively. In contrast, the composite Co3O4/carbon nanofiber electrode containing 10 - 30 nm Co3O4 nanoparticles showed fast capacity fading during cycling due to severe nanoparticle aggregation. Results suggested that the good electrochemical performance of Co3O4/carbon nanofiber electrode containing 30 - 50 nm Co3O4 nanoparticles was ascribed to the combination of the properties of both Co 3O4 nanoparticles (large Li storage capability) and carbon nanofiber matrix (long cycle life), and therefore this electrode material could be potentially used in high-energy rechargeable lithium-ion batteries. © 2013 American Chemical Society.

关键词： Lithium-ion batteries

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Thermoplastic elastomer systems for stimulated shape change: From electrical actuation to thermal recovery

Thermoplastic elastomer systems for stimulated shape change:...

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International Symposium on fibers Interfacing the World 2013

作者： Spontak, Richard J. Tallury, Syamal S. Ghosh, Tushar K. Pasquinelli, Melissa A. Pourdeyhimi, Behnam Department of Chemical and Biomolecular Engineering NC State University United States Department of Materials Science and Engineering NC State University United States Fiber and Polymer Science Program NC State University United States Department of Textile Engineering Chemistry and Science NC State University United States

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Design of Sustainable polymer Materials Through Molecular Simulations

Design of Sustainable Polymer Materials Through Molecular Si...

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The 12th Asian Textile Conference (第12届亚洲纺织会议暨2013年纺织学术年会)

作者： Melissa A.Pasquinelli Fiber and Polymer Science Program/Textile Engineering Chemistry and Science North Carolina State University USA

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Advanced Nanofibrous Energy-Storage Materials

Advanced Nanofibrous Energy-Storage Materials

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The 12th Asian Textile Conference (第12届亚洲纺织会议暨2013年纺织学术年会)

作者： Xiangwu Zhang Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University Raleigh USA

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Atmospheric Pressure Plasma-Electrospinning Hybrid Process

Atmospheric Pressure Plasma-Electrospinning Hybrid Process

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The 12th Asian Textile Conference (第12届亚洲纺织会议暨2013年纺织学术年会)

作者： Xiangwu Zhang Marian G.McCord Mohamed A.Bourham Quan Shi Narendiran Vitchuli Joshua Nowak Fiber and Polymer Science Program College of Textiles North Carolina State University Raleigh USA Department of Nuclear Engineering North Carolina State University Raleigh USA

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The Soft-Confined Method for Creating Molecular Models of Amorphous polymer Surfaces (vol 116, pg 1570, 2012)

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JOURNAL OF PHYSICAL CHEMISTRY B 2012年第8期116卷 2633-2633页

作者： Liu, Hongyi Li, Yan Krause, Wendy E. Rojas, Orlando J. Pasquinelli, Melissa A. †Fiber and Polymer Science Program and the Department of Textile Engineering Chemistry and Science North Carolina State University Raleigh NC 27695 United States

The goal of this work was to use molecular dynamics (MD) simulations to build amorphous surface layers of polypropylene (PP) and cellulose and to inspect their physical and interfacial properties. A new method to produce molecular models for these surfaces was developed, which involved the use of a “soft” confining layer comprised of a xenon crystal. This method compacts the polymers into a density distribution and a degree of molecular surface roughness that corresponds well to experimental values. In addition, calculated properties such as density, cohesive energy density, coefficient of thermal expansion, and the surface energy agree with experimental values and thus validate the use of soft confining layers. The method can be applied to polymers with a linear backbone such as PP as well as those whose backbones contain rings, such as cellulose. The developed PP and cellulose surfaces were characterized by their interactions with water. It was found that a water nanodroplet spreads on the amorphous cellulose surfaces, but there was no significant change in the dimension of the droplet on the PP surface; the resulting MD water contact angles on PP and amorphous cellulose surfaces were determined to be 106 and 33°, respectively. [ABSTRACT FROM AUTHOR]

关键词： MOLECULAR models AMORPHOUS substances SURFACES (Technology) INTERFACES (Physical sciences) MOLECULAR dynamics -- Simulation methods COMPACTING SURFACE energy

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Publisher's Note: “Communication: Molecular-level insights into asymmetric triblock copolymers: Network and phase development” [J. Chem. Phys. 141, 121103 (2014)]

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The Journal of Chemical Physics 2014年第16期141卷

作者： Syamal S. Tallury Kenneth P. Mineart Sebastian Woloszczuk David N. Williams Russell B. Thompson Melissa A. Pasquinelli Michal Banaszak Richard J. Spontak 1Department of Materials Science and Engineering North Carolina State University Raleigh North Carolina 27695 USA 2Fiber and Polymer Science Program North Carolina State University Raleigh North Carolina 27695 USA 3Department of Chemical and Biomolecular Engineering North Carolina State University Raleigh North Carolina 27695 USA 4Faculty of Physics Adam Mickiewicz University 61-614 Poznan Poland 5Department of Physics and Astronomy and Waterloo Institute for Nanotechnology University of Waterloo Waterloo Ontario N2L 3G1 Canada

This article was originally published online on 29 September 2014 with an error in the journal title of Ref. 36. The corrected reference appears below:

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