Synthesis of Triaxial LiFePO<sub>4</sub> Nanowire with a VGCF Core Column and a Carbon Shell through the Electrospinning Method

Hosono, Eiji; Wang, Yangang; Kida, Noriyuki; Enomoto, Masaya; Kojima, Naoya; Okubo, Masashi; Matsuda, Hirofumi; Saito, Yoshiyasu; Kudo, Tetsuichi; Honma, Itaru; Zhou, Haoshen

doi:10.1021/am900656y

Cited by 121 publications

(98 citation statements)

References 29 publications

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“…A high electrochemical performance was also achieved at the elevated operating temperature of 60 °C, with such cells displaying stable cycling (C rate) close to the theoretical maximum; capacity retention was expressed as 98% of the initial capacity after 100 charge-discharge cycles [392]. The electrochemical performance of the single-crystalline LFP nanowires exceeded those of CNT-LFP tri-axial nanowire composites prepared by a similar electrospinning process [426]. The increased performance is attributed to the smaller diameter nanowires (~100 nm), versus the larger CNT-LFP composite (~500 nm), resulting in shorter Li + diffusion paths.…”

Section: Lifepo4 (Lfp)mentioning

confidence: 88%

“…The ~100 nm wires, which are smaller than those previously reported for LFP [426,427], were deposited on stainless steel substrates by electrospinning an aqueous solution of Fe(NO3)3, LiH2PO4 and poly(ethylene oxide) (PEO), using an accelerating voltage of 15 kV before thermal annealing at 700 °C under flowing N2. TEM analysis revealed that the LFP nanowires grew along the c-axis, leading to facile Li + transport and a potentially high-rate response along the shortened b-and a-axis, while the carbon coating ensured adequate electrical conductivity and minimal aggregation throughout the electrode.…”

Section: Lifepo4 (Lfp)mentioning

confidence: 99%

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Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

et al. 2013

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Access to the full text of the published version may require a subscription. Rights © Tsinghua University Press and Springer-Verlag Berlin ABSTRACTThe performance of the lithium-ion cell is heavily dependent on the ability of the host electrodes to accommodate and release Li + ions from the local structure. While the choice of electrode materials may define parameters such as cell potential and capacity, the process of intercalation may be physically limited by the rate of solid-state Li + diffusion. Increased diffusion rates in lithium-ion electrodes may be achieved through a reduction in the diffusion path, accomplished by a scaling of the respective electrode dimensions.In addition, some electrodes may undergo large volume changes associated with charging and discharging, the strain of which, may be better accommodated through nanostructuring. Failure of the host to accommodate such volume changes may lead to pulverisation of the local structure and a rapid loss of capacity. In this review article, we seek to highlight a number of significant gains in the development of nanostructured lithium-ion battery architectures (both anode and cathode), as drivers of potential next-generation electrochemical energy storage devices.

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Section: Lifepo4 (Lfp)mentioning

confidence: 88%

Section: Lifepo4 (Lfp)mentioning

confidence: 99%

Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

et al. 2013

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“…Hosono et al synthesized a triaxial LiFePO 4 nanowire with a vapor-grown carbon fiber (VGCF) core and an amorphous carbon shell by the electrospinning method. The carbon fiber core oriented in the direction of the wire plays an important role in the conduction of electrons, whereas the outer amorphous carbon shell suppresses the oxidation of Fe 2+ [10]. Murugan et al used a microwave irradiated solvothermal method to prepare single crystalline lithium metal phosphates LiMPO 4 (M = Mn, Fe, Co, and Ni) with nano-thumblike shapes.…”

Section: -D Cathode Materialsmentioning

confidence: 99%

High-Performance Li-ion Batteries and Supercapacitors Based on Prospective 1-D Nanomaterials

2011

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One-dimensional (1-D) nanomaterials with superior specific capacity, higher rate capability, better cycling peroperties have demonstrated significant advantages for high-performance Li-ion batteries and supercapacitors. This review describes some recent developments on the rechargeable electrodes by using 1-D nanomaterials (such as LiMn2O4 nanowires, carbon nanofibers, NiMoO4 · nH2O nanorods, V2O5 nanoribbons, carbon nanotubes, etc.). New preparation methods and superior electrochemical properties of the 1-D nanomaterials including carbon nanotube (CNT), some oxides, transition metal compounds and polymers, and their composites are emphatically introduced. The VGCF/LiFePO4/C triaxial nanowire cathodes for Li-ion battery present a positive cycling performance without any degradation in almost theoretical capacity (160 mAh/g). The Si nanowire anodes for Li-ion battery show the highest known theoretical charge capacity (4277 mAh/g), that is about 11 times lager than that of the commercial graphite (∼372 mAh/g). The SWCNT/Ni foam electrodes for supercapacitor display small equivalent series resistance (ESR, 52 mΩ) and impressive high power density (20 kW/kg). The advantages and challenges associated with the application of these materials for energy conversion and storage devices are highlighted.

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“…Similarly, traditional tri-axial electrospinning always uses an electrospinnable outer fluid [32][33][34][35][36][37][38][39][40]. A modified tri-axial process focused on the exploitation of un-spinnable liquids has also been reported [28].…”

Section: Introductionmentioning

confidence: 99%

Nanosized sustained-release drug depots fabricated using modified tri-axial electrospinning

Yang

et al. 2017

Acta Biomaterialia

124

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Nanosized sustainedrelease drug depots fabricated using modified tri-axial electrospinning, Acta Biomaterialia (2017), doi: http:// dx.doi.org/10. 1016/j.actbio.2017.01.069 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.Nanosized sustained-release drug depots fabricated using modified tri-axial electrospinning Abstract:Nanoscale drug depots, comprising a drug reservoir surrounded by a carrier membrane, are much sought after in contemporary pharmaceutical research. Using cellulose acetate (CA) as a filament-forming polymeric matrix and ferulic acid (FA) as a model drug, nanoscale drug depots in the form of core-shell fibers were designed and fabricated using a modified tri-axial electrospinning process. This employed a solvent mixture as the outer working fluid, as a result of which a robust and continuous preparation process could be achieved. The fiber-based depots had a linear morphology, smooth surfaces, and an average diameter of 0.62 ± 0.07 µm. Electron microscopy data showed them to have clear core-shell structures, with the FA encapsulated inside a CA shell. X-ray diffraction and IR spectroscopy results verified that FA was present in the crystalline physical form. In vitro dissolution tests revealed that the fibers were able to provide close to zero-order release over 36 h, with no initial burst release and minimal tailing-off. The release properties of the depot systems were much improved over monolithic CA/FA fibers, which exhibited a significant burst release and also considerable tailing-off at the end of the release experiment. Here we thus demonstrate the concept of using modified tri-axial electrospinning to design and develop new types of heterogeneous nanoscale biomaterials.

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Synthesis of Triaxial LiFePO₄ Nanowire with a VGCF Core Column and a Carbon Shell through the Electrospinning Method

Cited by 121 publications

References 29 publications

Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

High-Performance Li-ion Batteries and Supercapacitors Based on Prospective 1-D Nanomaterials

Nanosized sustained-release drug depots fabricated using modified tri-axial electrospinning

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Synthesis of Triaxial LiFePO4 Nanowire with a VGCF Core Column and a Carbon Shell through the Electrospinning Method

Cited by 121 publications

References 29 publications

Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

High-Performance Li-ion Batteries and Supercapacitors Based on Prospective 1-D Nanomaterials

Nanosized sustained-release drug depots fabricated using modified tri-axial electrospinning

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Synthesis of Triaxial LiFePO₄ Nanowire with a VGCF Core Column and a Carbon Shell through the Electrospinning Method