Simultaneous densification and nitrogen doping of laser-induced graphene by duplicated pyrolysis for supercapacitor applications

Kim, Kyung Yeun; Choi, Hayelin; Tran, Chau Van; In, Junyong

doi:10.1016/j.jpowsour.2019.227199

Cited by 66 publications

(45 citation statements)

References 52 publications

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“…Heteroatom doping (with N, S, P, and B atoms) and surface modification with pseudocapacitive materials have been used to enhance the capacitive performances of LIG electrodes [9,23,24]. Our group recently developed a novel approach to simultaneously produce densified and nitrogen-doped LIG by duplicate pyrolysis [25]. The as-synthesized densified N-doped LIG was employed as an electrode in supercapacitors.…”

Section: Ofmentioning

confidence: 99%

“…Energies 2020, 13, 6567 3 of 9 completely remove the solvent. Finally, imidization of the PAA was conducted by annealing the dried sample at 250 °C for ~30 min by using a hotplate under ambient conditions [25]. s-LIG electrodes were fabricated with the same dimensions as the d-LIG electrodes, but by irradiating the PI sheet with a CO2 laser only once.…”

Section: Laser Pyrolysis Of Polyimidementioning

confidence: 99%

“…Then, the excess PAA solution was removed by using a spin coater at 1000 RPM for 30 s, 1500 RPM for 20 s, and finally 500 RPM for 20 s. The sample was then annealed in a vacuum oven (~20 torr) at 100 • C for 1 h to completely remove the solvent. Finally, imidization of the PAA was conducted by annealing the dried sample at 250 • C for~30 min by using a hotplate under ambient conditions [25].…”

Section: Characterizations Of the D-lig Electrodesmentioning

confidence: 99%

“…The result of this process was a LIG electrode. The optical chopper was used for the first pyrolysis because the use of this particular optical modulation was found to yield reproducible results related to the properties of d-LIG [25]. The LIG was then coated with PAA and subsequently thermally treated to induce the imidization of the PAA, producing a composite layer of LIG and PI.…”

Section: Fabrication Of D-lig Microsupercapacitorsmentioning

confidence: 99%

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Densified Laser-Induced Graphene for Flexible Microsupercapacitors

et al. 2020

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Microsupercapacitors have attracted significant attention due to several of their advantageous characteristics such as lightweight, small volume, and planar structure that is favorable for high mechanical flexibility. Among the various micro supercapacitor forms, those with laser-induced graphene (LIG) electrodes are promising as flexible energy storage devices. While LIG microelectrodes can be fabricated simply by direct laser writing, the capacitance and energy density of these devices are limited because of the relatively low density of LIG, which leads to low surface areas. These limitations could be overcome by densifying the LIG. Here, we report the use of densified laser-induced graphene (d-LIG) to fabricate flexible micro supercapacitors. Interdigitated d-LIG electrodes were prepared by duplicate laser pyrolysis of a polyimide sheet by using a CO2 laser. A PVA-H2SO4 gel-type electrolyte was then applied to the d-LIG electrode surface to assemble a d-LIG micro supercapacitor. This d-LIG micro supercapacitor exhibited substantially increased capacitance and energy density versus conventional low-density LIG micro supercapacitors. While the d-LIG electrode exhibited a substantial change in resistance when subjected to bending at a radius of 3 mm, the change in the capacitance of the d-LIG micro supercapacitor was negligible at the same bending radius due to reinforcement by the infiltrated poly(vinyl alcohol) (PVA) electrolyte, demonstrating the potential application of d-LIG micro supercapacitors in wearable electronics.

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Section: Ofmentioning

confidence: 99%

Section: Laser Pyrolysis Of Polyimidementioning

confidence: 99%

Section: Characterizations Of the D-lig Electrodesmentioning

confidence: 99%

Section: Fabrication Of D-lig Microsupercapacitorsmentioning

confidence: 99%

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Densified Laser-Induced Graphene for Flexible Microsupercapacitors

et al. 2020

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“…Under laser irradiation, the polymer undergoes pyrolysis because of laser-induced heat, yielding electrically conductive and porous carbon structures [ 9 , 12 , 13 , 14 , 15 , 16 ]. Thus, the laser beam scanning of a polymer film enables microscale carbon patterning, leaving the unaffected polymer area pristine [ 9 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Laser Pyrolysis of Imprinted Furan Pattern for the Precise Fabrication of Microsupercapacitor Electrodes

et al. 2020

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The design or dimension of micro-supercapacitor electrodes is an important factor that determines their performance. In this study, a microsupercapacitor was precisely fabricated on a silicon substrate by irradiating an imprinted furan micropattern with a CO2 laser beam under ambient conditions. Since furan is a carbon-abundant polymer, electrically conductive and porous carbon structures were produced by laser-induced pyrolysis. While the pyrolysis of a furan film in a general electric furnace resulted in severe cracks and delamination, the laser pyrolysis method proposed herein yielded porous carbon films without cracks or delamination. Moreover, as the imprinting process already designated the furan area for laser pyrolysis, high-precision patterning was achieved in the subsequent laser pyrolysis step. This two-step process exploited the superior resolution of imprinting for the fabrication of a laser-pyrolyzed carbon micropattern. As a result, the technical limitations of conventional laser direct writing could be overcome. The laser-pyrolyzed carbon structure was employed for microsupercapacitor electrodes. The microsupercapacitor showed a specific capacitance of 0.92 mF/cm2 at 1 mA/cm2 with a PVA-H2SO4 gel electrolyte, and retained an up to 88% capacitance after 10,000 charging/discharging cycles.

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Tuning the Laser‐Induced Processing of 3D Porous Graphenic Nanostructures by Boron‐Doped Diamond Particles for Flexible Microsupercapacitors

Deshmukh

Jakóbczyk

Ficek

et al. 2022

Adv Funct Materials

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Carbon (sp3)‐on‐carbon (sp2) materials have the potential to revolutionize fields such as energy storage and microelectronics. However, the rational engineering and printing of carbon‐on‐carbon materials on flexible substrates remains a challenge in wearable electronics technology. This study demonstrates the scalable fabrication of flexible laser‐induced graphene (LIG)‐boron doped diamond nanowall (BDNW) hybrid nanostructures for microsupercapacitors. Direct laser writing on polyimide film is tuned by the presence of BDNW powder where an appreciable absorbance of the BDNWs at the CO2 laser wavelength enhances the local film temperature. The thermal shock due to laser irradiation produces graphitized and amorphous carbon at the diamond grain boundaries which increases the thermal and charge transfer capacity between the LIG–diamond interfaces. The samples are further treated with O2 plasma to tune the wettability or to improve the microsupercapacitor device performance. The outstanding electrical characteristics of graphene, exceptional electrochemical stability of diamond, and essential contributions of oxygen‐containing groups result in a remarkable charge storage capacity (18 mF cm−2 @ 10 mV s−1) and cyclic stability (98% retention after 10 000 cycles) outperforming most state‐of‐the‐art LIG‐based supercapacitors. Furthermore, despite extreme mechanical stress, these microsupercapacitors maintain their outstanding electrochemical properties, thus holding promise for high‐power, flexible/wearable electronics.

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Simultaneous densification and nitrogen doping of laser-induced graphene by duplicated pyrolysis for supercapacitor applications

Cited by 66 publications

References 52 publications

Densified Laser-Induced Graphene for Flexible Microsupercapacitors

Densified Laser-Induced Graphene for Flexible Microsupercapacitors

Laser Pyrolysis of Imprinted Furan Pattern for the Precise Fabrication of Microsupercapacitor Electrodes

Tuning the Laser‐Induced Processing of 3D Porous Graphenic Nanostructures by Boron‐Doped Diamond Particles for Flexible Microsupercapacitors

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