New insights into the oxidation of single-walled carbon nanotubes for the fabrication of transparent conductive films

Sung, Sae Jin; Kim, Tae-Hoon; Yang, Seung Jae; Oh, Jee Young; Park, Chong Rae

doi:10.1016/j.carbon.2014.09.085

Cited by 19 publications

(12 citation statements)

References 47 publications

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“…All GQDs had a Dband near 1360 cm −1 originating from point defects and a Gband near 1600 cm −1 caused by the vibrations from the graphene structure. 22,23 The intensity ratios of D-and G-bands (I D /I G ) of NGQDs were larger than that of rGQD due to the introduction of nitrogen functionalities that act as defects. 24 While the rGQD had a G-band at 1605 cm −1 , the NGQD7 and the NGQD8 had a G-band at 1594 and 1592 cm −1 , respectively.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Revisiting the Role of Graphene Quantum Dots in Ternary Organic Solar Cells: Insights into the Nanostructure Reconstruction and Effective Förster Resonance Energy Transfer

Sung

Kim

Gihm³

et al. 2019

ACS Appl. Energy Mater.

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Recent studies have introduced the graphene quantum dot (GQD) as a third material for the bulk-heterojunction polymer:fullerene solar cell (PSC) to improve light conversion efficiency. Although exciton generation/dissociation and carrier transport in the GQD-incorporated light-absorbing layer are strongly influenced by the ternary component, detailed analysis on the role of GQD in the light-absorbing layer is lacking. In this study, a perspective on origin of improved photovoltaic performance of GQD-incorporated PSC is provided. The Förster resonance energy transfer (FRET) from GQD to polymer:fullerene and reorganization of the ternary-component film are analyzed. The GQD chemical nature difference after controlling nitrogen functionality affects the quantum yield (QY) and surface energy. Because the GQD is distributed in the fullerene-rich domain, actual improvements in the FRET to polymer-rich phase are not great, despite the improved QY and red-shifted photoluminescence. However, changes in the surface energy affect the degree of crystallinity of polymer domains and nanophase separation in polymer:fullerene films. The intense FRET from GQD to fullerene and favorable changes in the nanostructure lead to the enhancing the power conversion efficiency of GQD-containing ternary PSC.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Revisiting the Role of Graphene Quantum Dots in Ternary Organic Solar Cells: Insights into the Nanostructure Reconstruction and Effective Förster Resonance Energy Transfer

Sung

Kim

Gihm³

et al. 2019

ACS Appl. Energy Mater.

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“…Therefore, it is more important to balance the e‐function and PS‐function in functional separators because researchers are seeking chemical interactions with polysulfide species by considering the trade‐off relationship between them. For example, functionalization deteriorates the electron conductivity by damaging the π–π conjugation in carbonaceous materials while providing a chemical interactions to enhance the PS‐function …”

Section: E‐functionsmentioning

confidence: 99%

Rational Design of Nanostructured Functional Interlayer/Separator for Advanced Li–S Batteries

Jeong

Kim

Nam

et al. 2018

Adv Funct Materials

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302

197

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The lithium-sulfur (Li-S) battery is considered as a promising future energy storage device owing to its high theoretical energy density, low cost of the raw active material (sulfur), and its environmental friendliness. On the other hand, there are still challenging issues for the practical applications of Li-S batteries, including low sulfur utilization, poor cyclability, and rate capability. Although considerable efforts are made to overcome the current obstacles in Li-S batteries, one is still far from meeting the requirements for the commercialization of Li-S batteries. This review outlines the recent progress in Li-S batteries based on novel configurations, such as incorporating functional interlayers/separators beyond the approach for preparing novel cathodes, and discusses the role of the configuration in Li-S batteries. The functions of the newly introduced functional interlayer/separator are highlighted to address the problems of Li-S batteries. From classification of the functions, the perspectives and outlook are presented to rationally design a novel functional interlayer/separator for high-performance Li-S batteries.

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“…Since the aqueous system is environmentally benign and economically favorable for wastewater treatment compared with other organic solvent systems, many researchers have reported surface treatments of CNT to disperse the CNT in water. Functionalization such as the acid treatment of CNT was effective at dispersing CNT in the aqueous solvent [12]. Likewise, the intrinsically hydrophobic surface of CNTF prohibits penetration of water into the nanopores of CNTF, implying that the nanopores of CNTF cannot provide reaction sites for nanoparticle growth, electrochemical reactions, and catalytic reactions in an aqueous system.…”

Section: Introductionmentioning

confidence: 99%

Hydrophilic and Conductive Carbon Nanotube Fibers for High-Performance Lithium-Ion Batteries

Cheon

Lee

et al. 2021

Materials

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Carbon nanotube fiber (CNTF) is a highly conductive and porous platform to grow active materials of lithium-ion batteries (LIB). Here, we prepared SnO2@CNTF based on sulfonic acid-functionalized CNTF to be used in LIB anodes without binder, conductive agent, and current collector. The SnO2 nanoparticles were grown on the CNTF in an aqueous system without a hydrothermal method. The functionalized CNTF exhibited higher conductivity and effective water infiltration compared to the raw CNTF. Due to the enhanced water infiltration, the functionalized CNTF became SnO2@CNTF with an ideal core–shell structure coated with a thin SnO2 layer. The specific capacity and rate capability of SnO2@-functionalized CNTF were superior to those of SnO2@raw CNTF. Since the SnO2@CNTF-based anode was free of a binder, conductive agent, and current collector, the specific capacity of the anode studied in this work was higher than that of conventional anodes.

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New insights into the oxidation of single-walled carbon nanotubes for the fabrication of transparent conductive films

Cited by 19 publications

References 47 publications

Revisiting the Role of Graphene Quantum Dots in Ternary Organic Solar Cells: Insights into the Nanostructure Reconstruction and Effective Förster Resonance Energy Transfer

Revisiting the Role of Graphene Quantum Dots in Ternary Organic Solar Cells: Insights into the Nanostructure Reconstruction and Effective Förster Resonance Energy Transfer

Rational Design of Nanostructured Functional Interlayer/Separator for Advanced Li–S Batteries

Hydrophilic and Conductive Carbon Nanotube Fibers for High-Performance Lithium-Ion Batteries

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