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fiber Society's Spring 2015 Conference, in conjunction with the 2015 International Conference on Advanced fibers and polymer Materials: Functional fibers and textiles

作者： Zhang, Xiangwu Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University RaleighNC United States

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 energy storage technologies, supercapacitors have been considered as effective solution to the increasing need for high-power energy storage. Novel centrifugally-spun nanofibers with functional properties can dramatically alter surface reaction rates and charge transport throughout the supercapacitors, 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 advanced supercapacitors to achieve high system performance.

关键词： Nanofibers

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Carbon nanotube sheet electrodes for anisotropic actuation of dielectric elastomers

Carbon nanotube sheet electrodes for anisotropic actuation o...

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fiber Society's Spring 2015 Conference, in conjunction with the 2015 International Conference on Advanced fibers and polymer Materials: Functional fibers and textiles

作者： Fang, Xiaomeng Cakmak, Enes Yildiz, Ozkan Bradford, Philip D. Ghosh, Tushar K. Fiber and Polymer Science Program Textile Engineering Chemistry and Science Department North Carolina State University RaleighNC United States

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Nanofiber Materials for Lithium‑Ion Batteries

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Advanced fiber Materials 2023年第4期5卷 1141-1197页

作者： Xinwang Cao Chang Ma Lei Luo Lei Chen Hui Cheng Raphael Simha Orenstein Xiangwu Zhang National Engineering Laboratory for Advanced Yarn and Fabric Formation and Clean Production College of Textiles Science and EngineeringWuhan Textile UniversityWuhan 430200China Tianjin Municipal Key Lab of Advanced Fiber and Energy Storage Technology Tiangong UniversityTianjin 300387China Fiber and Polymer Science Program Department of Textile EngineeringChemistry and ScienceWilson College of TextilesNorth Carolina State UniversityRaleighNC 27695USA

The lithium-ion(Li-ion)battery has received considerable attention in the field of energy conversion and storage due to its high energy density and *** academic and commercial progress has been made in Li-ion battery *** area of advancement has been the addition of nanofiber materials to Li-ion batteries due to their unique and desirable structural features including large aspect ratios,high surface areas,controllable chemical compositions,and abundant composite *** the past few decades,considerable research efforts have been devoted to constructing advanced nanofiber materials possessing conductive networks to facilitate efficient electron transport and large specific surface areas to support catalytically active sites,both for the purpose of boosting electrochemical ***,we focus on recent advancements of nanofiber materials with carefully designed structures and enhanced electrochemical properties for use in Li-ion *** synthesis,structure,and properties of nanofiber cathodes,anodes,separators,and electrolytes,and their applications in Li-ion batteries are *** research challenges and prospects of nanofiber materials in Li-ion battery applications are delineated.

关键词： Nanofiber Lithium-ion battery Cathode Anode Separator Electrolyte

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Advanced energy storage nanofibers by Centrifugal spinning

Advanced energy storage nanofibers by Centrifugal spinning

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fiber Society 2014 Fall Meeting and Technical Conference: fibers for the Future

作者： Lu, Yao Zhang, Xiangwu Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University RaleighNC27695-8301 United States

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.

关键词： Nanofibers

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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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Advanced energy-storage nanofibers for high-energy lithium-ion batteries

Advanced energy-storage nanofibers for high-energy lithium-i...

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fiber Society 2010 Fall Meeting and Technical Conference

作者： Zhang, Xiangwu Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University RaleighNC27695-8301 United States

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.

关键词： textiles

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Electrochemical performance of electrospun α-Fe2O3/C nanofibers as anodes for lithium-ion batteries

Electrochemical performance of electrospun α-Fe2O3/C nanofi...

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fiber Society 2015 Fall Meeting and Technical Conference - fibers: Where Tradition Meets Innovation

作者： Zhu, Jiadeng Lu, Yao Chen, Chen Jasper, Samuel Zhang, Xiangwu Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University RaleighNC27695-8301 United States

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.

关键词： Nanofibers

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Electrospun nanofibers for energy storage

Electrospun nanofibers for energy storage

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American Association of textile Chemists and Colorists International Conference 2010

作者： Alcoutlabi, Mataz Ji, Liwen Guo, Bingkun Li, Shuli Li, Ying Zhang, Shu Toprakci, Ozan Zhang, Xiangwu Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University Raleigh NC 27695-8301 United States

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Switchable polymerization from Monomer Mixtures to Synthesize Oxygen-Rich Block Copolymers with Dual Recyclability and Degradability

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Angewandte Chemie 2025年

作者： Di Xie Zhi-Hua Jia Yan-Li Zhang Xin-Lei Cai Long-Nv Liu Prof. Guan-Wen Yang Prof. Xiaohui Kang Prof. Xianming Zhang Prof. Yao-Yao Zhang National Engineering Laboratory for Textile Fiber Materials and Processing Technology (Zhejiang) School of Materials Science and Engineering Zhejiang Sci-Tech University Hangzhou 310018 China Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China College of Pharmacy Dalian Medical University Dalian 116044 China

Switchable catalysis from monomer mixtures has been emerging as a powerful technique to synthesize various useful block copolymers, yet represents a significant challenge in polymer chemistry. Herein, we present the synthesis of well-defined polyacetal/polycarbonate block copolymers through switchable polymerization from mixtures of terminal epoxides, internal epoxides, o -phthalaldehyde (OPA) and CO 2 . The exclusive chemoselectivity of terminal epoxide or internal epoxide was achieved by controlling the reaction atmosphere. The dynamic equilibrium of acetal anion and alkoxy anion is the key to the successful switch from terminal epoxides/OPA copolymerization to internal epoxides/CO 2 copolymerization. Computational studies elucidated the kinetic and thermodynamic preferences underlying this selective polymerization. The acid/base labile nature of the block copolymers enables their sequence-controlled chemical recycling/degradation. These novel polyacetal/polycarbonate block copolymers with facilely sequence-controlled polymerization/depolymerization capabilities will enable their further tailored applications and contribute to the development of a circular plastic economy.

关键词： switchable polymerization block copolymer epoxide sequence control selective depolymerization

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Functionalized three-arm poly(ε-caprolactone) maleic acid microspheres for controlled protein release

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American Journal of Drug Delivery 2005年第4期3卷 253-267页

作者： Wu, Da-Qing Zhang, Xiang-Zheng Chu, Chih-Chang Fiber and Polymer Science Program Department of Textiles and Apparel and Biomedical Engineering Program Cornell University Ithaca NY United States Fiber and Polymer Science Program Department of Textiles and Apparel and Biomedical Engineering Program Cornell University Ithaca NY 14853-4401 United States

Introduction: The objective of this work was to fabricate a novel class of protein carriers from double-bond-functionalized multiarm poly(ε- caprolactone) maleic acid (PGCLM) microspheres and to examine protein sustained-release profiles in vitro over a period of a few months. Methods: The double-emulsion technique was used to formulate terminal functionalized three-arm PGCLM microspheres having three different types of functional groups (-OH, -COOH, and -C = C-), and one of the functional groups (>C = < bonds) was used to formulate surface-crosslinked microspheres (NPGCLM). Ovalbumin (OVA) was used as a model protein for examining its release profiles from PGCLM and NPGCLM microspheres in 0.1M phosphate-buffered saline (PBS) at 37°C. These microspheres were also characterized in terms of their morphology, size distribution, and stability. Results: The mean size of fabricated microspheres ranged from 21.9μm to 51.1μm. An OVA protein was successfully encapsulated into these biodegradable PGCLM microspheres with loading efficiency ranging from 34.2% to 46% (w/w), depending on the ratio of PGCLM to polyvinyl alcohol (PVA) stabilizer. Depending on the polymer to PVA stabilizer ratio, the cumulative OVA release % (w/w) in 0.1M PBS at 37°C ranged from 30% to 40% within 50 days. We further demonstrated the availability of the functional >C = C< bonds on the surface of PGCLM microspheres, which we expect could be used for either covalent binding of bioactive agents or imparting different chemical characteristics onto the surface of the microspheres for broadening of their applications. Discussion/Conclusion: A method for the preparation of biodegradable microspheres from water/oil emulsion of multiarm and functionalized poly(ε-caprolactone) [PGCL, PGCLM, and NPGCLM] was reported as a potential means of developing injectable therapeutic formulations for drugs. The most unique aspect of these biodegradable microspheres is the availability of two functional groups (>C = C< bon

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