Conversion of Langmuir–Blodgett monolayers and bilayers of poly(amic acid) through polyimide to graphene

Jo, Hanik; Lyu, Ji Hong; Ruoff, Rodney S.; Lim, Hyunseob; Yoon, Seong In; Jeong, Hu Young; Shin, Tae Joo; Bielawski, Christopher W.; Shin, Hyeon Suk

doi:10.1088/2053-1583/4/1/014005

Cited by 7 publications

(3 citation statements)

References 41 publications

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“…Due to the breakage of PI main chains and the decomposition of organic groups at high temperatures, the PI/3D-PI composites are successfully transformed into the C/C composite materials. [43,44] Although some nitrogen and oxygen atoms are retained in the carbon skeleton, the absorption peaks of C─N and C─O group are extremely low, owing to poor light transmittance and weak response of carbon composites.…”

Section: Chemical Structuresmentioning

confidence: 99%

Facile Preparation and Boosted Electrochemical Properties of Carbon/Carbon Composite Electrodes for Supercapacitors

Wang

et al. 2023

Energy Tech

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Herein, a kind of carbon/carbon composite electrode is prepared using polyimide (PI)/3D sphere‐like polyimide composite films as precursors, followed by carbonization. 2,2‐bis(3‐amino‐4‐hydroxyphenyl)hexafluoropropane and 4,4’‐(hexafluoroisopropylidene)diphthalic anhydride are polymerized and thermally imidized to form the matrix, and 3D sphere‐like PI particles synthesized by the solvothermal process are introduced via the in situ polymerization method. The electrochemical behaviors of C/C composites are examined in relation to the loading of the 3D sphere‐like PI crystals and carbonization temperatures. The C/C composite PI/5%3D‐PI‐800 demonstrates a specific capacitance maximum of 322.7 F g−1 at 0.5 A g−1 due to synergistic effects between different types of PIs. The specific capacitance decreases to 214 F g−1 with a retention rate of 66.3% as the current density increases to 10 A g−1. Moreover, the symmetrical supercapacitor (SC) assembled by PI/5%3D‐PI‐800 shows a specific capacitance of 244.4 F g−1 at 0.5 A g−1, with a high energy density of 33.94 Wh kg−1 and a power density of 500 W kg−1. In addition, after 6 months of storage, the button SC is retested and still shows fantastic capacitance retention rate of above 99.5%. Thus, this work proposes a facile method to fabricate the C/C composite electrodes with outstanding electrochemical properties.

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Section: Chemical Structuresmentioning

confidence: 99%

Facile Preparation and Boosted Electrochemical Properties of Carbon/Carbon Composite Electrodes for Supercapacitors

Wang

et al. 2023

Energy Tech

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“…Поверхностное сопротивление полученных пленок углерода толщиной 4 nm составляло 15 k . В работе [4] при карбонизации пленок Ленгмюра−Блоджетт (ЛБ) полиимида (ПИ) на поверхности Cu-подложки были получены пленки графена, однако на подложке SiO 2 /Si образовывались только аморфные пленки углерода. Ранее мы сообщали о получении проводящих и оптически прозрачных углеродных пленок на поверхности кварца и сапфира в результате карбонизации пленок ЛБ жесткоцепного ПИ ДФ-оТД [5].…”

Section: поступило в редакцию 15 февраля 2019 г в окончательной редаunclassified

Получение Высокопроводящих И Оптически Прозрачных Пленок Со Структурой Мультиграфена Путем Карбонизации Полиимидных Пленок Ленгмюра-Блоджетт

Голоудина¹,

Лучинин²,

Пасюта³

et al. 2019

Письма В Журнал Технической Физики

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For the first time, multilayer graphene films on quartz glass were obtained by carbonization of the Langmuir-Blodgett films of polyimide. On the Raman spectra of the carbonized polyimide films, the G, D bands and a wide band in the region of 2300–3200 cm-1 were observed. Using the method of transmission microscopy, it was shown that films consist of “stacks” of layers with a interlayers distance of 0.36 nm. The surface resistance of films 5 nm thick was 1.2±0.2 kOmega, and the transmittance was 87% at lambda=550 nm. In the infrared region of the spectrum, the transmittance was 97%, and in the UV region 70-80%.

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“…Based on previous studies, the molecular structure of a solid carbon precursor has major influence on the growth kinetic of graphene on Cu. The growth mechanisms may mainly have two types: (i) polycyclic aromatic hydrocarbons (PAHs) diffuse and coalesce into graphene on the surface of Cu [14,16,28]; (ii) amorphous carbon or polymers without aromatic moieties such as polymethylmethacrylate (PMMA) decompose into gaseous hydrocarbons followed by gas re-adsorption and graphene nucleation on Cu [27,29]. The transformation of PMMA to graphene at high temperature [30] is similar to the CVD process of gaseous hydrocarbons.…”

Section: Introductionmentioning

confidence: 99%

Direct growth of high crystallinity graphene from water-soluble polymer powders

Qiao¹,

Zhong²,

Huang³

et al. 2018

2D Mater.

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The use of solid-state carbon sources is effective to produce graphene by safe and low-cost chemical vapor deposition (CVD) process. Water-soluble polymers are generally environmentally friendly and have great potential on large-scale green production of graphene. Here, we systematically study the growth of graphene from water-soluble polymers on copper foils. Two different conversion ways are adopted to investigate the growth mechanism of graphene from water-soluble polymers. We find that the metal-binding functional group hydroxyl strongly influences the vaporization of water-soluble polymers on Cu foils, which hinders the formation of graphene films by rapid thermal treatment. In direct CVD process using water-soluble polymer powders as precursors, oxygenated functional groups in polymers can enhance the crystallinity of as-grown graphene in contrast to solid hydrocarbons without containing oxygen (e.g. polyethylene). Large and continuous graphene films of high quality are synthesized from polyvinyl alcohol and polyethylene glycol. Nitrogen doping in graphene can be easily realized by using nitrogen-containing water-soluble polymers (e.g. polyvinyl pyrrolidone).

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Conversion of Langmuir–Blodgett monolayers and bilayers of poly(amic acid) through polyimide to graphene

Cited by 7 publications

References 41 publications

Facile Preparation and Boosted Electrochemical Properties of Carbon/Carbon Composite Electrodes for Supercapacitors

Facile Preparation and Boosted Electrochemical Properties of Carbon/Carbon Composite Electrodes for Supercapacitors

Получение Высокопроводящих И Оптически Прозрачных Пленок Со Структурой Мультиграфена Путем Карбонизации Полиимидных Пленок Ленгмюра-Блоджетт

Direct growth of high crystallinity graphene from water-soluble polymer powders

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