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Li₂MnSiO₄/Carbon Composite Nanofibers as a High-Capacity Cathode Material for Li-Ion Batteries

Soft Nanoscience Letters 2012年第3期2卷 54-57页

作者： Shu Zhang Ying Li Guanjie Xu Shuli Li Yao Lu Ozan Topracki Xiangwu Zhang Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University Raleigh NC..Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University Raleigh NC..Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University Raleigh NC..Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University Raleigh NC..Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University Raleigh NC..Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University Raleigh NC..Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University Raleigh NC..

Li₂MnSiO₄ has an extremely high theoretical capacity of 332 mAh?g^?1. However, only around half of this capacity has been realized in practice and the capacity retention during cycling is also low. In this study, Li₂MnSiO₄/carbon composite nanofibers were prepared by a combination of electrospinning and heat treatment. The one-dimensional continuous carbon nanofiber matrix serves as long-distance conductive pathways for both electrons and ions. The composite nanofiber structure avoids the aggregation of Li₂MnSiO₄ particles, which in turn enhances the electrode conductivity and promotes the reaction kinetics. The resultant Li₂MnSiO₄/carbon composite nanofibers were used as the cathode material for Li-ion batteries, and they delivered high charge and discharge capacities of 218 and 185 mAh?g^?1, respectively, at the second cycle. In addition, the capacity retention of Li₂MnSiO₄ at the first 20th cycles increased from 37% to 54% in composite nanofibers.

关键词： Electrospinning Li2MnSiO4 Carbon Nanofibers Li-Ion Battery

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Biologically Inspired Design: Color on Wings

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MRS Online Proceedings Library (OPL) 2012年第1期479卷 117-117页

作者： Mohan Srinivasarao Luis Padilla Department of Textile Engineering Chemistry and Science Fiber & Polymer Science Program North Carolina State University Raleigh NC 27695-8301

Brilliant, iridescent colors found on the bodies and wings of many birds, butterflies and moths are produced by structural variations and have been the subject of study for centuries. Such brilliant colors have been described as metallic colors due to the saturation or purity of the color produced and have attracted the attention of great scientists like Newton, Michelson and Lord Rayleigh. It was recognized early on that such colors arise from physical effects such as interference or diffraction as opposed to colors that are normally produced due to the presence of chromophores which absorb or emit light. Common examples of physical colors are some butterfly wings [1], color of Indigo snake skin [2], hummingbird feathers [3,4], arthropod cuticles [which are due to selective reflection of color from the solidified cholesteric phase of chitin crystallites] [5], gemstones like opal [6,7], and some crystals like potassium chlorate [8]. While the origins of such colors are well understood the properties of color and color specification have not received much attention.

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Li<sub>2</sub>MnSiO<sub>4</sub>/Carbon Composite Nanofibers as a High-Capacity Cathode Material for Li-Ion Batteries

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Soft Nanoscience Letters 2012年第3期2卷 54-57页

Li2MnSiO4 has an extremely high theoretical capacity of 332 mAh?g?1. However, only around half of this capacity has been realized in practice and the capacity retention during cycling is also low. In this study, Li2MnSiO4/carbon composite nanofibers were prepared by a combination of electrospinning and heat treatment. The one-dimensional continuous carbon nanofiber matrix serves as long-distance conductive pathways for both electrons and ions. The composite nanofiber structure avoids the aggregation of Li2MnSiO4 particles, which in turn enhances the electrode conductivity and promotes the reaction kinetics. The resultant Li2MnSiO4/carbon composite nanofibers were used as the cathode material for Li-ion batteries, and they delivered high charge and discharge capacities of 218 and 185 mAh?g?1, respectively, at the second cycle. In addition, the capacity retention of Li2MnSiO4 at the first 20th cycles increased from 37% to 54% in composite nanofibers.

关键词： Electrospinning Li2MnSiO4 Carbon Nanofibers Li-Ion Battery

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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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Mesoporous activated carbon nanofiber synthesis from catalytic graphitization of polyacrylonitrile/cobalt sulfide composite

Mesoporous activated carbon nanofiber synthesis from catalyt...

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fiber Society 2012 Fall Meeting and Technical Conference in Partnership with polymer fibers 2012: Rediscovering fibers in the 21st Century

作者： Aykut, Yakup Pourdeyhimi, Behnam Khan, Saad A. Department of Textile Engineering Uludaǧ University Bursa16059 Turkey Fiber and Polymer Science North Carolina State University RaleighNC27695-8301 United States Chemical and Biomolecular Engineering North Carolina State University RaleighNC27695-7905 United States

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Removal of Methyl Orange from Aqueous Solution by Calcium Alginate/Multi-walled Carbon Nanotubes Composite fibers

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Energy Procedia 2012年 16卷 863-868页

作者： Yujin Li Kunyan Sui Rongzhan Liu Xin Zhao Yang Zhang Hongchao Liang Yanzhi Xia State Key Laboratory Cultivating Base for New Fiber Materials and Modern Textile Department of Polymer Science and Engineering Qingdao University Qingdao 266071 China Institute of Chemical Engineering Qingdao University Qingdao 266071 China

Adsorbent of calcium alginate/multi-walled carbon nanotubes (CA/MWCNTs) composite fiber was prepared by wet spinning. Adsorptions of methyl orange (MO) anionic dyes onto CA/MWCNTs composite fiber were investigated with respect to MWCNTs content, initial dye concentration and pH values. Results illustrated that introduction of MWCNTs could obviously increase the adsorption capacity ( qe ) of MO onto CA/MWCNTs composite fibers. The equilibrium adsorption data were analyzed using two widely applied isotherms: Langmuir and Freundlich. The results showed that Langmuir isotherm fitted the experimental results well.

关键词： Calcium alginate Multi-walled carbon nanotubes Composite fibers Methyl orange Adsorption

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Removal of Methyl Orange from Aqueous Solution by Calcium Alginate/Multi-walled Carbon Nanotubes Composite fibers

Removal of Methyl Orange from Aqueous Solution by Calcium Al...

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2012 International Conference on Future Energy,Environment,and Materials

作者： Yujin Li Kunyan Sui Rongzhan Liu Xin Zhao Yang Zhang Hongchao Liang Yanzhi Xia State Key Laboratory Cultivating Base for New Fiber Materials and Modern Textile Department of Polymer Science and Engineering Qingdao University Institute of Chemical Engineering Qingdao University

Adsorbent of calcium alginate/multi-walled carbon nanotubes(CA/MWCNTs) composite fiber was prepared by wet spinning. Adsorptions of methyl orange(MO) anionic dyes onto CA/MWCNTs composite fiber were investigated with respect to MWCNTs content, initial dye concentration and p H values. Results illustrated that introduction of MWCNTs could obviously increase the adsorption capacity(qe) of MO onto CA/MWCNTs composite fibers. The equilibrium adsorption data were analyzed using two widely applied isotherms: Langmuir and Freundlich. The results showed that Langmuir isotherm ?tted the experimental results well.

关键词： Calcium alginate Multi-walled carbon nanotubes Composite fibers Methyl orange Adsorption

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Novel Atmospheric plasma enhanced Silk Fibroin nanofiber/Gauze composite wound dressings

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Journal of fiber Bioengineering and Informatics 2012年第3期5卷 227-242页

作者： Nawalakhe, Rupesh Shi, Quan Vitchuli, Narendiran Bourham, Mohamed A. Zhang, Xiangwu Mccord, Marian G. Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University Raleigh NC 27695-8301 United States Department of Nuclear Engineering North Carolina State University Raleigh NC 27695-7909 United States Joint Department of Biomedical Engineering North Carolina State University Raleigh NC 27695-7115 United States University of North Carolina Chapel Hill NC 27599 United States

In this work, Silk Fibroin (SF) nanofibers were electrospun onto plasma-treated 100% cotton gauze bandages to form a novel silk-gauze composite wound dressing. Atmospheric pressure plasma pre- and post- treatments were used to increase the adhesion between the SF nanofibers and cotton substrates. The adhesion of the nanofibers to the substrates was assessed by qualitative and quantitative techniques. Plasma pre-treatment of the substrate with 100% helium and 99% helium/1% oxygen plasmas showed up to a 50% increase in the force required to peel off the nanofiber layer. This force was further increased up to 75% after pre- as well as post-plasma treatment of the composite bandages. Plasma pre-treatment of the gauze fabric prior to nanofiber deposition and post-treatment to the composite bandages significantly reduced degradation of the nanofiber layer during repetitive flexing. Air permeability and moisture vapor transport were significantly reduced due to the presence of a nanofiber layer upon the substrate. The results of surface elemental analysis showed that the adhesion and durability increase are mainly due to the active species generated by plasma on the surface of cotton substrate as well as on the surface of the silk fibroin nanofibers. © 2012 Binary Information Press & textile Bioengineering and Informatics Society.

关键词： Adhesion

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Electrospun LATP /PAN composite fiber-based membrane for lithium-ion battery separators

Electrospun LATP /PAN composite fiber-based membrane for lit...

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2011 International Conference on Advanced fibers and polymer Materials, ICAFPM 2011

作者： Liang, Yinzheng Qiu, Yiping Zhang, Xiangwu Department of Textile Materials Science and Product Design College of Textile Donghua University Shanghai 201620 China 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)9787122120199

The lithium aluminum titanium phosphate (LATP)/Polyacrylonitrile (PAN) composite fiber-based membrane were prepared by electrospinning composite solution of LATP and PAN in N, N-dimethylformamide(DMF). The crystallization phase of the LATP particles were characterized by X-ray diffraction(XRD). The electrolyte uptakes of the electrospun LATP/PAN composite fiber-based membranes were also evaluated. In addition, the electrochemical performance of the liquid electrolyte-soaked electrospun LATP/PAN composite fiber-based is also improved after the introduction of LATP particles.

关键词： Electrospinning

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Properties and Structure of Multi-walled Carbon Nanotubes/Cellulose Composites fibers Using Ionic Liquid as Solvent

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Journal of Donghua University(English Edition) 2011年第6期28卷 591-594页

作者：蔡涛杨瑜榕王明葵张慧慧 National Textile and Garment Quality Supervision Testing Center Fiber Inspection Bureau of Fujian Province State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua University

To take advantage of cellulose material and prepare a kind of high performance fiber,multi-walled carbon nanotubes(MWNTs) were used as fillers to produce MWNTs/cellulose composite fibers using ionic liquid as *** thermal properties,mechanical properties,and structure of the composite fibers were *** wide angle X-ray diffraction(WAXD) measurements show that MWNTs/cellulose composite fibers have cellulose Ⅱ crystal *** results obtained from thermal gravimetric analysis(TGA) indicate that the addition of low nanotubes amounts leads to an increase in the degrade *** tensile mechanical properties show that initial modulus and tensile strength considerably increase in the presence of nanotubes with a maximum for 66.7% and 22.7%.

关键词： carbon nanotubes ionic liquid composite fiber mechanical properties

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