Heterogeneous Manganese Oxide‐Encased Carbon Nanocomposite Fibers for High Performance Pseudocapacitors

Li, Qiang; Lozano, Karen; Lü, Yinong; Mao, Yuanbing

doi:10.1002/9781118807934.ch5

Cited by 3 publications

(4 citation statements)

References 48 publications

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“…The first peak centered at 322 °C, corresponding to an energy release of 166.4 J g –1 and a weight loss of 19 wt % based on the related TGA thermogram, can be attributed to the decomposition of zinc nitrate precursor salt into ZnO . Moreover, the thermal degradation of PVP displays a two-step decay in accordance with our previous studies on manganese oxide–PVP composites . The peak centered at 438 °C correlates with the weight loss with the onset of ∼345 °C in the TGA thermogram.…”

Section: Resultssupporting

confidence: 87%

“…44 Moreover, the thermal degradation of PVP displays a two-step decay in accordance with our previous studies on manganese oxide−PVP composites. 38 The peak centered at 438 °C correlates with the weight loss with the onset of ∼345 °C in the TGA thermogram. It corresponds to the breakage of pyrrolidone pendant groups off the PVP backbones with an energy release of 45.9 J g −1 .…”

Section: ■ Results and Discussionmentioning

confidence: 97%

“…Specific to the FS process, the generated centrifugal force via high-speed rotation (e.g., 9000 rpm) drives viscous precursor solutions out the reservoir through spinneret orifices to create fibers. As long as the centrifugal force and hydrostatic pressure exceed the capillary force, there is no need during the FS process to consider and adjust many tedious spinning control parameters, such as those influencing Taylor cone and jet stability. − Therefore, the FS technique is really a simplistic and scalable process for fiber fabrication. For example, the production rate for our PVP/Zn(NO 3 ) 2 composite fibers was measured to be ∼0.68 g min –1 on a lab-scale setup.…”

Section: Resultsmentioning

confidence: 99%

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Facile and Scalable Synthesis of “Caterpillar-like” ZnO Nanostructures with Enhanced Photoelectrochemical Water-Splitting Effect

Li¹,

Sun²,

Lozano³

et al. 2014

J. Phys. Chem. C

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In an effort to replace conventional multistep seeding methods to produce multidimensional ZnO nanostructures with high spatial occupancy of nanowires (NWs), a rational and facile synthesis protocol for "caterpillar-like" branched ZnO nanofibers (BZNs) is reported. This process combined the scalable forcespinning technology with a hydrothermal process to efficiently develop BZNs to substantially enhance surface area and roughness factor. Specifically, unbranched ZnO nanofibers were first prepared by spinning polyvinylpyrrolidone (PVP)/zinc nitrate hexahydrate (Zn(NO 3 ) 2 •6H 2 O) composite fibers, followed by calcination at 500 °C. These fibers were deposited on flat substrates to serve as nonwoven netlike seed sites for hydrothermal growth of ultradense and uniform NW branches to form "caterpillar-like" BZNs. Their usage as photoanodes in photoelectrochemical water-splitting cells was evaluated, resulting in a photon-to-hydrogen conversion efficiency of 0.165%, an enhancement of 147% when compared to ZnO NW arrays with similar dimensions. An enhanced light-harvesting process coupled with a facile and scalable synthetic procedure is presented.

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Section: Resultssupporting

confidence: 87%

Section: ■ Results and Discussionmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Facile and Scalable Synthesis of “Caterpillar-like” ZnO Nanostructures with Enhanced Photoelectrochemical Water-Splitting Effect

Li¹,

Sun²,

Lozano³

et al. 2014

J. Phys. Chem. C

Self Cite

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show abstract

“…Fiber collection can also be controlled in terms of the direction it comes from. Potter et al invented a hand-held, portable centrifugal spinning apparatus that can gather generated fiber in the perpendicular direction using a flow-induced method [78]. Jao et al described a system in which a rotating head was combined with an automated track collector to collect fibers in an aligned fashion.…”

Section: Types Of Collectorsmentioning

confidence: 99%

Recent Advances in Centrifugal Spinning and Their Applications in Tissue Engineering

et al. 2023

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Over the last decade, researchers have investigated the potential of nano and microfiber scaffolds to promote wound healing, tissue regeneration, and skin protection. The centrifugal spinning technique is favored over others due to its relatively straightforward mechanism for producing large quantities of fiber. Many polymeric materials have yet to be investigated in search of those with multifunctional properties that would make them attractive in tissue applications. This literature presents the fundamental process of fiber generation, and the effects of fabrication parameters (machine, solution) on the morphologies such as fiber diameter, distribution, alignment, porous features, and mechanical properties. Additionally, a brief discussion is presented on the underlying physics of beaded morphology and continuous fiber formation. Consequently, the study provides an overview of the current advancements in centrifugally spun polymeric fiber-based materials and their morphological features, performance, and characteristics for tissue engineering applications.

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Mixed-valent VOx/polymer nanohybrid fibers for flexible energy storage materials

Altecor¹,

Li²,

Lozano³

et al. 2014

Ceramics International

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Heterogeneous Manganese Oxide‐Encased Carbon Nanocomposite Fibers for High Performance Pseudocapacitors

Cited by 3 publications

References 48 publications

Facile and Scalable Synthesis of “Caterpillar-like” ZnO Nanostructures with Enhanced Photoelectrochemical Water-Splitting Effect

Facile and Scalable Synthesis of “Caterpillar-like” ZnO Nanostructures with Enhanced Photoelectrochemical Water-Splitting Effect

Recent Advances in Centrifugal Spinning and Their Applications in Tissue Engineering

Mixed-valent VOx/polymer nanohybrid fibers for flexible energy storage materials

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