High performance lithium-ion capacitors based on scalable surface carved multi-hierarchical construction electrospun carbon fibers

Le, TrungHieu; Tian, Hao; Cheng, Jie; Huang, Zheng‐Hong; Kang, Feiyu; Yang, Ying

doi:10.1016/j.carbon.2018.06.015

Cited by 44 publications

(30 citation statements)

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“…Due to their unique structures, PCFs have been proven to be alternative carbon-based materials to produce more effective, controlled porous structures, leading to excellent rate capability, superior cyclical performance and larger energy conversion density. 234–237 For boosting the performance of rechargeable metal-ion batteries, one of the most advanced characters of PCFs as anodes is their high metal storage capacity, including lithium, sodium and potassium. 238–245 The following mechanism has been widely proven using different forms of PCF, (1) their highly disordered carbon structure, rich defective voids and pores improve the capacitive adsorption of metal ions; (2) their typical one-dimensional structure with highly porous morphologies provides a short transport distance and diffusion pressure for ions; (3) PCFs can store metal ions in turbostratic and graphitic interlayers via intercalation, and metal clusters in micropores/voids by reversible plating/striping; (4) the hierarchical pores offer more opportunities to modify the structural and chemical properties of PCFs, which can further improve the storage capacity for metals.…”

Section: Mechanism Analysis Of Pcfs For Advanced Energy and Environmental Applicationsmentioning

confidence: 99%

Structural design and mechanism analysis of hierarchical porous carbon fibers for advanced energy and environmental applications

Liu

Kang

et al. 2022

J. Mater. Chem. A

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Section: Mechanism Analysis Of Pcfs For Advanced Energy and Environmental Applicationsmentioning

confidence: 99%

Structural design and mechanism analysis of hierarchical porous carbon fibers for advanced energy and environmental applications

Liu

Kang

et al. 2022

J. Mater. Chem. A

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“…Similar I D /I G ratios were obtained for reference PAN 10 -CNFs and the other CNF webs. Their values between 1.8 and 2.7 demonstrate that the fibers are composed by disordered carbon (due to the relatively low carbonization temperature of 1000 • C) with local graphite inclusions (turbostratic domains) already evidenced for electrospun CNFs [24,39,47,54]. Table 2.…”

Section: Characterization Of Porogen-pan Fibrous Webs After Carbonizamentioning

confidence: 90%

“…The spectra were fitted with more contributions, namely the D4 band, ascribed to sp 3 -carbon (1180 cm −1 ), the D3 band (1500 cm −1 ) associated with an amorphous sp 2 carbon bonded in the graphitic phase and the D2 band (1580 cm −1 ) corresponding to graphitic lattices in the structure ( Figure S3) [50]. The relative intensities of the D and G bands (I D /I G ) as well as the relative areas (A D /A G) are often used to estimate the degree of graphitization of carbon materials [39,51]. Lower I D /I G ratios indicate higher levels of crystalline sp 2 -carbon [52,53].…”

Section: Characterization Of Porogen-pan Fibrous Webs After Carbonizamentioning

confidence: 99%

“…Different kinds of templates can further be combined to produce hierarchical porosity, which is crucial for the transport of different species (ions, gases, liquids) in the electrodes of various electrochemical devices. For instance, the combination of PVP with Mg salts [22,39] gave rise to hierarchical meso-and microporosity inside CNFs prepared by electrospinning. For the post-synthetic approach, various chemical activations have been investigated to create porosity in preformed CNFs.…”

Section: Introductionmentioning

confidence: 99%

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Strategies to Hierarchical Porosity in Carbon Nanofiber Webs for Electrochemical Applications

et al. 2019

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Morphology and porosity are crucial aspects for designing electrodes with facile transport of electrons, ions and matter, which is a key parameter for electrochemical energy storage and conversion. Carbon nanofibers (CNFs) prepared by electrospinning are attractive for their high aspect ratio, inter-fiber macroporosity and their use as self-standing electrodes. The present work compares several strategies to induce intra-fiber micro-mesoporosity in self-standing CNF webs prepared by electrospinning polyacrylonitrile (PAN). Two main strategies were investigated, namely i) a templating method based on the addition of a porogen (polymethyl methacrylate, polyvinylpyrrolidone, Nafion® or ZnCl2) in the electrospinning solution of PAN, or ii) the activation in ammonia of previously formed CNF webs. The key result of this study is that open intra-fiber porosity could be achieved only when the strategies i) and ii) were combined. When each approach was applied separately, only closed intra-fiber porosity or no intra-fiber porosity was observed. In contrast, when both strategies were used in combination all CNF webs showed high mass-specific areas in the range of 325 to 1083 m2·g−1. Selected webs were also characterized for their carbon structure and electrical conductivity. The best compromise between high porosity and high electrical conductivity was identified as the fibrous web electrospun from PAN and polyvinylpyrrolidone.

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“…This work extends the template strategy to prepare nonporous and porous PI nanotubes. The porous PI nanotubes can also be further converted to porous carbon nanotubes, which may have potential applications in areas such as gas separation, capacitors, and energy storage devices …”

mentioning

confidence: 99%

Porous Polyimide and Carbon Nanotubes: Solvent Vapor–Induced Transformation in the Nanochannels of Anodic Aluminum Oxide Templates

et al. 2019

Macro Materials & Eng

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nanofibrous PI membranes by electrospinning [14] ; the porous hydrophobic membranes were used for oil/water separation.Despite these works, it is still a great challenge to fabricate porous PI-based nanomaterials with controllable morphologies, properties, and sizes. In this work, we develop a novel and facile strategy to fabricate porous PI nanotubes using the template method with a solvent vapor-induced transformation process. The porous PI nanotubes are prepared by wetting the nanochannels of anodic aluminum oxide (AAO) templates with poly(pyromellitic dianhydride-co-4,4′-oxydianiline), amic acid (PAA) solutions using the solution wetting method. By introducing the solvent vapor-induced transformation process, depression of the PAA nanotubes occurs, resulting in the formation of porous PAA nanotubes. After the imidization process at 300 °C and carbonization process at 650 °C, porous PI and carbon nanotubes can be obtained, respectively. The pore lengths of the porous nanotubes can be controlled by changing the type of the annealing solvent and the solvent annealing time.In the past, polymer and carbon nanomaterials have been fabricated using different porous templates. [15][16][17][18][19][20][21][22][23] This work extends the template strategy to prepare nonporous and porous PI nanotubes. The porous PI nanotubes can also be further converted to porous carbon nanotubes, which may have potential applications in areas such as gas separation, capacitors, and energy storage devices. [24][25][26][27] Before preparing the nonporous and porous PAA, PI, and carbon nanostructures, we first examine the PAA, PI, and carbon films coated on glass substrates to confirm the viability of the imidization and carbonization processes. For the imidization process, the N−H bonds of PAA break and the N atoms connect the C atoms to form the imide rings, which can be confirmed by the disappearance of the N-H and O-H stretching bands at 2900-3200 cm −1 in the Fourier transform infrared (FTIR) spectra ( Figure S1a, Supporting Information). The CO stretching bands at 1661 cm −1 for the PAA films are also shifted and changed to symmetric stretching and asymmetric stretching vibration bands at 1777 and 1724 cm −1 , respectively, for the PI films. Moreover, the CN stretching band at 1549 cm −1 for the PAA films is shifted to 1380 cm −1 for the PI films. In addition, the CO bending band at 724 cm −1 is formed for the PI films. Porous Carbon NanotubesPolyimides (PIs) have attracted wide attention because of their exceptional thermal stability and applications in areas such as printed circuit boards and multichip modules. It remains a great challenge, however, to control the morphologies and properties of PI-based nanomaterials, especially porous PI-based nanotubes. In this work, a versatile method to fabricate porous PI nanotubes via the template method is developed, with a solvent vaporinduced transformation process. First, polyamic acid (PAA) solutions are used as precursors and infiltrated into the nanochannels of anodic aluminum oxide...

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High performance lithium-ion capacitors based on scalable surface carved multi-hierarchical construction electrospun carbon fibers

Cited by 44 publications

References 45 publications

Structural design and mechanism analysis of hierarchical porous carbon fibers for advanced energy and environmental applications

Structural design and mechanism analysis of hierarchical porous carbon fibers for advanced energy and environmental applications

Strategies to Hierarchical Porosity in Carbon Nanofiber Webs for Electrochemical Applications

Porous Polyimide and Carbon Nanotubes: Solvent Vapor–Induced Transformation in the Nanochannels of Anodic Aluminum Oxide Templates

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