Ultra-thin highly-wrinkled graphene-like nanosheets for supercapacitor electrodes via 4-nitrocatechol and solvent-induced self-assembly

Liang, Yining; Zhou, Yingqiao; Smith, Richard L.; Qi, Xinhua

doi:10.1016/j.carbon.2023.01.003

Cited by 16 publications

(3 citation statements)

References 71 publications

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“…Furthermore, the C and N ratios of 3D GFs remained at ∼80 and ∼20 wt %, respectively, independent of surficial wettability with no oxygen detection (Figure S10). Consequently, 3D GFs maintained high surface area, which is an important prerequisite to facilitate chemical modifications (e.g., microwave-mediated radical chemisorption 55 ), as well as rapid mass and charge transport (e.g., surface−interface reactions of supercapacitors 56 ).…”

Section: Resultsmentioning

confidence: 99%

Ultrafast and Reversible Superwettability Switching of 3D Graphene Foams via Solvent-Exclusive Plasma Treatments

Cheon,

Cho,

et al. 2024

ACS Nano

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For highly active electron transfer and ion diffusion, controlling the surface wettability of electrically and thermally conductive 3D graphene foams (3D GFs) is required. Here, we present ultrasimple and rapid superwettability switching of 3D GFs in a reversible and reproducible manner, mediated by solvent-exclusive microwave arcs. As the 3D GFs are prepared with vapors of nonpolar acetone or polar water exclusively, short microwave radiation (≤10 s) leads to plasma hotspot-mediated production of methyl and hydroxyl radicals, respectively. Upon immediate radical chemisorption, the 3D surfaces become either superhydrophobic (water contact angle = ∼170°) or superhydrophilic (∼0°), and interestingly, the wettability transition can be repeated many times due to the facile exchange between previously chemisorbed and newly introduced radicals via the formation of methanol-like intermediates. When 3D GFs of different surficial polarities are incorporated into electric doublelayer capacitors with nonpolar ionic liquids or polar aqueous electrolytes, the polarity matching between graphene surfaces and electrolytes results in ≥548.0 times higher capacitance compared to its mismatching at ≥0.5 A g −1 , demonstrating the significance of wettability-controlled 3D GFs.

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Section: Resultsmentioning

confidence: 99%

Ultrafast and Reversible Superwettability Switching of 3D Graphene Foams via Solvent-Exclusive Plasma Treatments

Cheon,

Cho,

et al. 2024

ACS Nano

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“…Typically, carbon‐based LICs are developed where the characteristics of carbon, such as surface area, pore size, particle size, and morphology, play a vital role [18] . Among different carbon species, the high surface area and layer‐structured ones, especially graphene‐like species such as graphene, reduced graphene oxide (rGO), carbon nanosheets, N‐doped carbon (g‐CN) and polymer‐supported nano carbon exhibited excellent capacitance performance and higher stability due to their synergistic 2D features [19–25] . Furthermore, the capacitance mechanism in the case of carbon materials is a purely double‐layer surface adsorption phenomenon, developing their categorization as electrochemical double‐layer capacitors (EDLCs) [18] .…”

Section: Introductionmentioning

confidence: 99%

“…[18] Among different carbon species, the high surface area and layer-structured ones, especially graphene-like species such as graphene, reduced graphene oxide (rGO), carbon nanosheets, N-doped carbon (g-CN) and polymer-supported nano carbon exhibited excellent capacitance performance and higher stability due to their synergistic 2D features. [19][20][21][22][23][24][25] Furthermore, the capacitance mechanism in the case of carbon materials is a purely double-layer surface adsorption phenomenon, developing their categorization as electrochemical double-layer capacitors (EDLCs). [18] The metallic layer structured materials, similar to graphene and pseudocapacitive charge storage abilities, have gained attention for developing LICs.…”

Section: Introductionmentioning

confidence: 99%

Molybdenum Sulfide Nanoflowers as Electrodes for Efficient and Scalable Lithium‐Ion Capacitors

Mir,

Hoseini,

Hansen

et al. 2024

Chemistry A European J

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Hybrid supercapacitors (HSCs) bridge the unique advantages of batteries and capacitors and are considered promising energy storage devices for hybrid vehicles and other electronic gadgets. Lithium‐ion capacitors (LICs) have attained particular interest due to their higher energy and power density than traditional supercapacitor devices. The limited voltage window and the deterioration of anode materials upsurged the demand for efficient and stable electrode materials. Two‐dimensional (2D) molybdenum sulfide (MoS2) is a promising candidate for developing efficient and durable LICs due to its wide lithiation potential and unique layer structure, enhancing charge storage efficiency. Modifying the extrinsic features, such as the dimensions and shape at the nanoscale, serves as a potential path to overcome the sluggish kinetics observed in the LICs. Herein, the MoS2 nanoflowers have been synthesized through a hydrothermal route. The developed LIC exhibited a specific capacitance of 202.4 F g‑1 at 0.25 A g‑1 and capacitance retention of > 90% over 5,000 cycles. Using an ether electrolyte improved the voltage window (2.0 V) and enhanced the stability performance. The ex‐situ material characterization after the stability test reveals that the storage mechanism in MoS2‐LICs is not diffusion‐controlled. Instead, fast surface redox reactions, especially intercalation/deintercalation, are more prominent for charge storage.

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Unveiling the potential of graphene and S-doped graphene nanostructures for toxic gas sensing and solar sensitizer cell devices: insights from DFT calculations

Alsaati,

Abdoon,

Hussein

et al. 2024

J Mol Model

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Ultra-thin highly-wrinkled graphene-like nanosheets for supercapacitor electrodes via 4-nitrocatechol and solvent-induced self-assembly

Cited by 16 publications

References 71 publications

Ultrafast and Reversible Superwettability Switching of 3D Graphene Foams via Solvent-Exclusive Plasma Treatments

Ultrafast and Reversible Superwettability Switching of 3D Graphene Foams via Solvent-Exclusive Plasma Treatments

Molybdenum Sulfide Nanoflowers as Electrodes for Efficient and Scalable Lithium‐Ion Capacitors

Unveiling the potential of graphene and S-doped graphene nanostructures for toxic gas sensing and solar sensitizer cell devices: insights from DFT calculations

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