Fabrication of Supercapacitor Electrodes Using Fluorinated Single-Walled Carbon Nanotubes

Lee, Jiyeong; An, Kay Hyeok; Heo, Jeong Ku; Lee, Young Hee

doi:10.1021/jp034546u

Cited by 87 publications

(54 citation statements)

References 21 publications

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“…1(b)]. In practice, different addition patterns are likely to coexist, resulting in a global F=C ratio consistent with the experimentally observed maximum coverage below 250 C of 20% to 25% [7,14,17]. However, as fluorine surface coverage increases, the average binding energy per F atom drops; our calculations for C 4 F give a binding energy per F of 1.75 eV for the (8,8) nanotube.…”

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confidence: 77%

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Pattern Formation on Carbon Nanotube Surfaces

et al. 2006

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Calculations of fluorine binding and migration on carbon nanotube surfaces show that fluorine forms varying surface superlattices at increasing temperatures. The ordering transition is controlled by the surface migration barrier for fluorine atoms to pass through next neighbor sites on the nanotube, explaining the transition from semi-ionic low coverage to covalent high coverage fluorination observed experimentally for gas phase fluorination between 200 and 250 C. The effect of solvents on fluorine binding and surface diffusion is explored.

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supporting

confidence: 77%

“…Fluorinated nanotubes can be used as precursors for further functionalization [3,4] and are soluble in a variety of common solvents [3,5], aiding tube bundle separation and purification. Potential applications for fluorinated nanotubes include use as electrodes in lithium-ion batteries [6], supercapacitors [7], and lubricants [8][9][10].…”

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confidence: 99%

Pattern Formation on Carbon Nanotube Surfaces

et al. 2006

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“…The high specific capacitance of CNTs could also be obtained with the incorporation of heteroatoms such as N [61,[78][79][80][81][82][83][84][85][86][87], B [86][87][88][89], P [86,90], and F [91]. The type of defect created by the heteroatom influences the kind of conduction generated ranging from n-type transport (N substitution doping) to p-type conduction (B substitution of boron in lattice) [92].…”

Section: Covalent Modification Of Carbon Nanotubes and Their Capacitamentioning

confidence: 99%

Recent Progress on Electrochemical Capacitors Based on Carbon Nanotubes

Grądzka¹,

Winkler²

2018

Carbon Nanotubes - Recent Progress

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This review is focused on the theoretical and practical aspects of electrochemical c a p a c i t o r sb a s e do nc a r b o nn a n o t u b e s .I np articular, recent improvements in the capacitance properties of the systems are discussed. In the first part, the charge storage mechanisms of the electrochemical capacitors are briefly described. The next part of the review is devoted to the capacitance properties of pristine single-and multi-walled carbon nanotubes. The major portion of the review is focused on the capacitance properties of modified carbon nanotubes. The electrochemical properties of nanotubes with boron, nitrogen, and other atoms incorporated into the carbon network structure as well as nanotubes modified with different functional groups are discussed. Special attention is paid to the composites of carbon nanotubes and conducting polymers, transition metal oxides, carbon nanostructures, and carbon gels. In all cases, the influences of different parameters such as porosity, structure of the electroactive layer, conductivity of the layer, nature of the heteroatoms, solvent and supporting electrolyte on the capacitance performance of hybrid materials are discussed. Finally, the capacitance properties of different systems containing carbon nanotubes are compared and summarized.

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“…[ 59,60,[232][233][234] With the presence of mesoporesc oming from the central canal and/or tube entanglement, CNTsh ave excellent access to the electrolyte. [235] Our group demonstrated that most of the BET surface area of SWCNT electrodes synthesized by directcurrenta rc discharge contributes to the theoretically estimated specific capacitance.…”

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confidence: 99%

Carbon‐Based Materials for Lithium‐Ion Batteries, Electrochemical Capacitors, and Their Hybrid Devices

2015

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A rapidly developing market for portable electronic devices and hybrid electrical vehicles requires an urgent supply of mature energy-storage systems. As a result, lithium-ion batteries and electrochemical capacitors have lately attracted broad attention. Nevertheless, it is well known that both devices have their own drawbacks. With the fast development of nanoscience and nanotechnology, various structures and materials have been proposed to overcome the deficiencies of both devices to improve their electrochemical performance further. In this Review, electrochemical storage mechanisms based on carbon materials for both lithium-ion batteries and electrochemical capacitors are introduced. Non-faradic processes (electric double-layer capacitance) and faradic reactions (pseudocapacitance and intercalation) are generally explained. Electrochemical performance based on different types of electrolytes is briefly reviewed. Furthermore, impedance behavior based on Nyquist plots is discussed. We demonstrate the influence of cell conductivity, electrode/electrolyte interface, and ion diffusion on impedance performance. We illustrate that relaxation time, which is closely related to ion diffusion, can be extracted from Nyquist plots and compared between lithium-ion batteries and electrochemical capacitors. Finally, recent progress in the design of anodes for lithium-ion batteries, electrochemical capacitors, and their hybrid devices based on carbonaceous materials are reviewed. Challenges and future perspectives are further discussed.

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Fabrication of Supercapacitor Electrodes Using Fluorinated Single-Walled Carbon Nanotubes

Cited by 87 publications

References 21 publications

Pattern Formation on Carbon Nanotube Surfaces

Pattern Formation on Carbon Nanotube Surfaces

Recent Progress on Electrochemical Capacitors Based on Carbon Nanotubes

Carbon‐Based Materials for Lithium‐Ion Batteries, Electrochemical Capacitors, and Their Hybrid Devices

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