Structure-Performance relationship guided design and strategic synthesis of lithiated oxa-graphene for high lithium storage

Li, Laurent; Liu, Naxing; Wang, Jian; Xu, Yongqi; Bai, Li; Jiang, Long; Cui, Liang; Shen, Chengshuo; Liu, Xunshan; Zhao, Fu‐Gang

doi:10.1016/j.jcis.2022.12.140

Cited by 4 publications

(3 citation statements)

References 37 publications

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“…This combination brings together the energy characteristics of the battery and the power, cycle life, and fast charge and recharging times of supercapacitors. An excellent example of this type of hybrid supercapacitor is the lithium‐ion capacitor [96,103] …”

Section: Fundamentals Of Supercapacitorsmentioning

confidence: 99%

Recent Progress in Polyaniline and its Composites for Supercapacitors

Shah

Oladepo

Ehsan

et al. 2023

The Chemical Record

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Polyaniline (PANI) has piqued the interest of nanotechnology researchers due to its potential as an electrode material for supercapacitors. Despite its ease of synthesis and ability to be doped with a wide range of materials, PANI′s poor mechanical properties have limited its use in practical applications. To address this issue, researchers investigated using PANI composites with materials with highly specific surface areas, active sites, porous architectures, and high conductivity. The resulting composite materials have improved energy storage performance, making them promising electrode materials for supercapacitors. Here, we provide an overview of recent developments in PANI‐based supercapacitors, focusing on using electrochemically active carbon and redox‐active materials as composites. We discuss challenges and opportunities of synthesizing PANI‐based composites for supercapacitor applications. Furthermore, we provide theoretical insights into the electrical properties of PANI composites and their potential as active electrode materials. The need for this review stems from the growing interest in PANI‐based composites to improve supercapacitor performance. By examining recent progress in this field, we provide a comprehensive overview of the current state‐of‐the‐art and potential of PANI‐based composites for supercapacitor applications. This review adds value by highlighting challenges and opportunities associated with synthesizing and utilizing PANI‐based composites, thereby guiding future research directions.

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Section: Fundamentals Of Supercapacitorsmentioning

confidence: 99%

Recent Progress in Polyaniline and its Composites for Supercapacitors

Shah

Oladepo

Ehsan

et al. 2023

The Chemical Record

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“…9 Two major compositions of GF are (C 2 F) n and (CF) n , both of which adopt the layered structure. 10,11 The highly resistive GF or fluorographene 12 can become more conducting when the F content decreases by electron beam irradiation, 13,14 thermal decomposition, 6,15,16 and chemical functionalizations, 17,18 mostly due to the restoration of the sp 2 network of carbon. There is a wealth of information on electrical properties of fluorographene, 12,19,20 fluorinated amorphous carbon, 21 fluorinated carbon nanotubes, 22 or polytetrafluoroethylene (PTFE).…”

Section: ■ Introductionmentioning

confidence: 99%

“…Fluorination of carbon-based materials (e.g., carbon nanotubes, fibers, and diamond-like carbons) can effectively modify their physical properties, thanks to the diversity of the C–F bonds, their numbers, and distributions. , Among fluorine-containing carbon materials, graphite fluoride (GF) is a classic example with covalent C(sp 3 )–F bonds, finding uses as a solid lubricant, cathode for lithium-ion batteries, precursor for the 2D derivatives (graphene/fluorographene , ), hydrophobic coatings, or thermally conductive yet electrically insulating coatings . Two major compositions of GF are (C 2 F) n and (CF) n , both of which adopt the layered structure. , The highly resistive GF or fluorographene can become more conducting when the F content decreases by electron beam irradiation, , thermal decomposition, ,, and chemical functionalizations, , mostly due to the restoration of the sp 2 network of carbon. There is a wealth of information on electrical properties of fluorographene, ,, fluorinated amorphous carbon, fluorinated carbon nanotubes, or polytetrafluoroethylene (PTFE) .…”

Section: Introductionmentioning

confidence: 99%

Fluorine-Rich, Hydrophobic Graphite Fluoride with Improved Charge Transport/Storage Properties Produced by Gamma Irradiation

Maluangnont,

Chaithaweep,

Sangtawesin

et al. 2024

J. Phys. Chem. C

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It is known that fluorine-containing carbon materials are highly insulating and exhibit low dielectric permittivity due to the presence of covalent C–F bonds and F atoms with small polarizability. These electrical properties can be improved by defluorination (F loss) and by partial restoration of the aromatic character of the carbon networks. Contrary to this knowledge, we show herein that γ-irradiation of graphite fluoride (CF) n improves its conductivity and charge transport/storage properties while preserving the F content. It is found that the crystallinity and specific surface area decrease by γ-irradiation, but the platy morphology, composition, surface functional, thermal stability, and optical band gap are maintained. Comparing to the nonirradiated one, the sample irradiated at 400 kGy shows increased conductivity (10–9 vs 10–10 S·cm–1) and shorter relaxation time (0.3 vs 0.9 ms), consistent with the decreased apparent activation energy (76.3 vs 82.4 kJ·mol–1). Meanwhile at 200 kGy, the dielectric permittivity increases to ∼6 (from 4.2) with the loss tangent close to the nonirradiated sample. These findings are attributed to the variation of effective dimension of charge carriers which is optimized (depending on the properties considered) at 200/400 kGy and at 50 °C but not at elevated temperatures. The chemical-free, ambient-temperature tuning of electrical properties by γ-irradiation is also demonstrated by the calculated refractive index (up to 2.4, temperature-independent from RT to 200 °C) and the dielectric heating coefficient, which varies by a factor of 2 at the same temperature range.

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Nitrogen-functionalization of carbon materials for supercapacitor: Combining with nanostructure directly is superior to doping amorphous element

Zhang,

Wang

et al. 2024

Journal of Colloid and Interface Science

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Structure-Performance relationship guided design and strategic synthesis of lithiated oxa-graphene for high lithium storage

Cited by 4 publications

References 37 publications

Recent Progress in Polyaniline and its Composites for Supercapacitors

Recent Progress in Polyaniline and its Composites for Supercapacitors

Fluorine-Rich, Hydrophobic Graphite Fluoride with Improved Charge Transport/Storage Properties Produced by Gamma Irradiation

Nitrogen-functionalization of carbon materials for supercapacitor: Combining with nanostructure directly is superior to doping amorphous element

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