The Enhanced Lithium-Storage Performance for MnO Nanoparticles Anchored on Electrospun Nitrogen-Doped Carbon Fibers

Zhang, Rui; Duan, Xue; Peng, Lechao; Kang, Wenjun; Li, Haibo

doi:10.3390/nano8090733

Cited by 5 publications

(3 citation statements)

References 44 publications

(51 reference statements)

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“…But on the other hand, the conversion is a very complicated process with many uncertain and changeable factors, involving several disciplines such as electrostatic dynamics, hydrodynamics, and polymeric rheology [12,13,14,15,16]. Thus, it is not strange that although numerous publications have reported the potential applications of electrospun nanofibers in a wide variety of fields, such as energy [17,18,19], environment [20,21,22,23], medicine [24,25,26,27], food engineering [28,29,30] and tissue engineering [31,32,33], no uniform theories about this process have been put forward. Often, a mathematical model that is built on a certain working fluid fails to predict another type of working fluid.…”

Section: Introductionmentioning

confidence: 99%

The Relationships between Process Parameters and Polymeric Nanofibers Fabricated Using a Modified Coaxial Electrospinning

et al. 2019

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The concrete relationship between the process parameters and nanoproduct properties is an important challenge for applying nanotechnology to produce functional nanomaterials. In this study, the relationships between series of process parameters and the medicated nanofibers’ diameter were investigated. With an electrospinnable solution of hydroxypropyl methylcellulose (HPMC) and ketoprofen as the core fluid, four kinds of nanofibers were prepared with ethanol as a sheath fluid and under the variable applied voltages. Based on these nanofibers, a series of relationships between the process parameters and the nanofibers’ diameters (D) were disclosed, such as with the height of the Taylor cone (H, D = 125 + 363H), with the angle of the Taylor cone (α, D = 1576 − 19α), with the length of the straight fluid jet (L, D = 285 + 209L), and with the spreading angle of the instable region (θ, D = 2342 − 43θ). In vitro dissolution tests verified that the smaller the diameters, the faster ketoprofen (KET) was released from the HPMC nanofibers. These concrete process-property relationships should provide a way to achieve new knowledge about the electrostatic energy-fluid interactions, and to meanwhile improve researchers’ capability to optimize the coaxial process conditions to achieve the desired nanoproducts.

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Section: Introductionmentioning

confidence: 99%

The Relationships between Process Parameters and Polymeric Nanofibers Fabricated Using a Modified Coaxial Electrospinning

et al. 2019

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“…PtMn/CNFs were prepared following our previous work [33]. Briefly, the Pt(acac) 2 /Mn(acac) 3 /PAN nanofibers were firstly stabilized at 230 • C for 3.0 h in air and then further annealed at the target temperature (650~1050 • C) for 1.0 h under N 2 atmosphere.…”

Section: Preparation Of Ptmn/cnfs Catalystsmentioning

confidence: 99%

Electrospinning Synthesis of Carbon-Supported Pt3Mn Intermetallic Nanocrystals and Electrocatalytic Performance towards Oxygen Reduction Reaction

et al. 2020

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To realize the large-scale application of fuel cells, it is still a great challenge to improve the performance and reduce the cost of cathode catalysts towards oxygen reduction reaction (ORR). In this work, carbon-supported ordered Pt3Mn intermetallic catalysts were prepared by thermal annealing electrospun polyacrylonitrile nanofibers containing Platinum(II) acetylacetonate/ Manganese(III) acetylacetonate. Compared with its counterparts, the ordered Pt3Mn intermetallic obtained at 950 °C exhibits a more positive half-potential and higher kinetic current density during the ORR process. Benefiting from their defined stoichiometry and crystal structure, the Mn atoms in Pt3Mn intermetallic can modulate well the geometric and electronic structure of surface Pt atoms, endowing Pt3Mn catalyst with an enhanced ORR catalytic activity. Moreover, it also has a better catalytic stability and methanol tolerance than commercial Pt/C catalyst. Our study provides a new strategy to fabricate a highly active and durable Pt3Mn intermetallic electrocatalyst towards ORR.

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“…In order to surpass these deficiencies, different strategies have been described in recent literature: to obtain nanomembranes [ 6 ], to modify the synthesis routes [ 3 ], to prepare composites with diverse carbon materials [ 7 ], and to optimize the materials response by nano-architecturing them with diverse clays as supports [ 8 ]. It is worth mentioning several recent strategies implying the use of carbon fibers obtained from different precursors, leading to a significant improvement of conductivity and structural stability through the discharge-charge processes [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

New Fe2O3-Clay@C Nanocomposite Anodes for Li-Ion Batteries Obtained by Facile Hydrothermal Processes

Alonso-Domínguez

Pico²,

Álvarez-Serrano

et al. 2018

Nanomaterials

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New iron-oxide-based anodes are prepared by an environmentally-friendly and low-cost route. The analysis of the composition, structure, and microstructure of the samples reveals the presence of a major hematite phase, which is accompanied by a certain concentration of an oxyhydroxide phase, which can act as a “lithium-reservoir”. By using sodium alginate as a binder, the synthesized anodes display superior electrochemical response, i.e., high specific capacity values and high stability, not only versus Li but also versus a high voltage cathode in a full cell. From these bare materials, clay-supported anodes are further obtained using sepiolite and bentonite natural silicates. The electrochemical performance of such composites is improved, especially for the sepiolite-containing one treated at 400 °C. The thermal treatment at this temperature provides the optimal conditions for a synergic nano-architecture to develop between the clay and the hematite nanoparticles. High capacity values of ~2500 mA h g−1 after 30 cycles at 1 A g−1 and retentions close to 92% are obtained. Moreover, after 450 cycles at 2 A g−1 current rate, this composite electrode displays values as high as ~700 mA h g−1. These results are interpreted taking into account the interactions between the iron oxide nanoparticles and the sepiolite surface through hydrogen bonds. The electrochemical performance is not only dependent on the oxidation state and particle morphology, but the composition is revealed as a key feature.

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The Enhanced Lithium-Storage Performance for MnO Nanoparticles Anchored on Electrospun Nitrogen-Doped Carbon Fibers

Cited by 5 publications

References 44 publications

The Relationships between Process Parameters and Polymeric Nanofibers Fabricated Using a Modified Coaxial Electrospinning

The Relationships between Process Parameters and Polymeric Nanofibers Fabricated Using a Modified Coaxial Electrospinning

Electrospinning Synthesis of Carbon-Supported Pt3Mn Intermetallic Nanocrystals and Electrocatalytic Performance towards Oxygen Reduction Reaction

New Fe2O3-Clay@C Nanocomposite Anodes for Li-Ion Batteries Obtained by Facile Hydrothermal Processes

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