Electrochemical synthesis of polyaniline-exfoliated graphene composite films and their capacitance properties

Sayah, Abdelfetteh; Habelhames, Farid; Bahloul, Ahmed; Nessark, Belkacem; Bonnassieux, Yvan; Tendelier, Denis; Jouad, Mohamed El

doi:10.1016/j.jelechem.2018.04.016

Cited by 116 publications

(56 citation statements)

References 53 publications

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“…The decomposition and recombination of hydrocarbon molecules could be confirmed by the presence of C 2 during the reaction, which has been reported to play an important role in the formation of carbon nanoparticles 9 . According to the FE-SEM, TEM, and XRD results, the morphology of the PC was found to be similar to that of the graphene-like carbon sheets reported in previous works, while LC mainly contained turbostratic carbon surrounding multi-layer fullerene-like carbon, which is generally produced by SP 1 , 14 – 19 . In addition, the Raman results suggested that PC contained defective crystal phases, but LC mainly contained an amorphous phase embedded with small, ordered carbon structures.…”

Section: Discussionsupporting

confidence: 81%

Simultaneous synthesis of graphite-like and amorphous carbon materials via solution plasma and their evaluation as additive materials for cathode in Li–O2 battery

Chokradjaroen

Watanabe

Ishii

et al. 2021

Sci Rep

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Cathode materials are essential for enhancing electrocatalytic activity in energy-conversion devices. Carbon is one of the most suitable cathodic materials for Li–O2 batteries owing to its chemical and thermal stability. Carbon materials synthesized from tributyl borate (TBB) using a nonthermal solution plasma method were characterized using x‐ray diffraction, Raman, field emission scanning electron microscopy (FE-SEM), transmission electron microscopy, and x-ray photoelectron spectroscopy and were evaluated as additive materials for cathodes in a Li–O2 battery. Two separate carbon materials were formed at the same time, a carbon dispersed in solution and a carbon precipitate at the bottom of the reactor, which had amorphous and graphite-like structures, respectively. The amorphous carbon contained boron and tungsten carbide, and the graphite-like carbon had more defects and electronic conductivity. The crystallinity and density of defects in the graphite-like carbon could be tuned by changing the SP operating frequency. The Li–O2 battery with the amorphous carbon containing boron and tungsten carbide was found to have a high capacity, while the one with the graphite-like carbon showed an affinity for the formation of Li2O2, which is the desired discharge product, and exhibited high cycling performance.

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Section: Discussionsupporting

confidence: 81%

Simultaneous synthesis of graphite-like and amorphous carbon materials via solution plasma and their evaluation as additive materials for cathode in Li–O2 battery

Chokradjaroen

Watanabe

Ishii

et al. 2021

Sci Rep

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show abstract

“…Except for the diffraction peaks of perovskite and FTO, there was a strong peak located at 26.5°, which belongs to the (002) face of graphite. [ 44 ] In comparison with DB coating, the higher intensity of the (002) peak for the ES printed carbon layer suggests a denser carbon layer obtained by the ES printing technique, which is consistent with the morphological observation. The low conductivity and ineffective interfacial charge transfer are the two main reasons responsible for the poor performance of carbon‐based PSCs.…”

Section: Resultssupporting

confidence: 82%

All Electrospray Printing of Carbon‐Based Cost‐Effective Perovskite Solar Cells

Wang

Jiang

et al. 2020

Adv Funct Materials

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With the power conversion efficiencies of perovskite solar cells (PSCs) exceeding 25%, the PSCs are a step closer to initial industrialization. Prior to transferring from laboratory fabrication to industrial manufacturing, issues such as scalability, material cost, and production line compatibility that significantly impact the manufacturing remain to be addressed. Here, breakthroughs on all these fronts are reported. Carbon‐based PSCs with architecture fluorine doped tin oxide (FTO)/electron transport layer/perovskite/carbon, that eliminate the need for the hole transport layer and noble metal electrode, provide ultralow‐cost configuration. This PSC architecture is manufactured using a scalable and industrially compatible electrospray (ES) technique, which enables continuous printing of all the cell layers. The ES deposited electron transport layer and perovskite layer exhibit properties comparable to that of the laboratory‐scale spin coating method. The ES deposited carbon electrode layer exhibits superior conductivity and interfacial microstructure in comparison to films synthesized using the conventional doctor blading technique. As a result, the fully ES printed carbon‐based PSCs show a record 14.41% power conversion efficiency, rivaling the state‐of‐the‐art hole transporter‐free PSCs. These results will immediately have an impact on the scalable production of PSCs.

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“…The crystalline nature of natural graphite and GNPs was determined, and the X-ray-diffraction (XRD) analysis and the results are shown in Figure 3a. The XRD pattern of graphite showed a sharp characteristic peak at 26.9 • , which is a 002-diffraction signal [43]. Interestingly, in the XRD pattern of the GNPs, this peak shifts to 26.4 • with a significantly broadened and weakened intensity compared to that of graphite, indicating a less orderly structure with multi-layered graphene [37].…”

Section: Resultsmentioning

confidence: 97%

Scalable Fabrication of Modified Graphene Nanoplatelets as an Effective Additive for Engine Lubricant Oil

La¹,

Truong²,

Pham³

et al. 2020

Nanomaterials

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The use of nano-additives is widely recognized as a cheap and effective pathway to improve the performance of lubrication by minimizing the energy loss from friction and wear, especially in diesel engines. In this work, a simple and scalable protocol was proposed to fabricate a graphene additive to improve the engine lubricant oil. Graphene nanoplates (GNPs) were obtained by a one-step chemical exfoliation of natural graphite and were successfully modified with a surfactant and an organic compound to obtain a modified GNP additive, that can be facilely dispersed in lubricant oil. The GNPs and modified GNP additive were characterized using scanning electron microscopy, X-ray diffraction, atomic force microscopy, Raman spectroscopy, and Fourier-transform infrared spectroscopy. The prepared GNPs had wrinkled and crumpled structures with a diameter of 10–30 µm and a thickness of less than 15 nm. After modification, the GNP surfaces were uniformly covered with the organic compound. The addition of the modified GNP additive to the engine lubricant oil significantly enhanced the friction and antiwear performance. The highest reduction of 35% was determined for the wear scar diameter with a GNP additive concentration of approximately 0.05%. The mechanism for lubrication enhancement by graphene additives was also briefly discussed.

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Electrochemical synthesis of polyaniline-exfoliated graphene composite films and their capacitance properties

Cited by 116 publications

References 53 publications

Simultaneous synthesis of graphite-like and amorphous carbon materials via solution plasma and their evaluation as additive materials for cathode in Li–O2 battery

Simultaneous synthesis of graphite-like and amorphous carbon materials via solution plasma and their evaluation as additive materials for cathode in Li–O2 battery

All Electrospray Printing of Carbon‐Based Cost‐Effective Perovskite Solar Cells

Scalable Fabrication of Modified Graphene Nanoplatelets as an Effective Additive for Engine Lubricant Oil

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