Fabrication and electrochemical evaluation of micro-supercapacitors prepared by direct laser writing on free-standing graphite oxide paper

Kumar, Rajesh; Joanni, Ednan; Savú, Raluca; Pereira, Matheus S.; Singh, Rajesh Kumar; Constantino, Carlos J. L.; Kubota, Lauro T.; Matsuda, Atsunori; Moshkalev, Stanislav

doi:10.1016/j.energy.2019.05.032

Cited by 86 publications

(23 citation statements)

References 58 publications

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“…Based on the CV data, the capacitance of the same supercapacitor was calculated to be ~1.84 mF/cm 2 at 100 mV/s. This value is not as high as the capacitance of laser-induced graphene microsupercapacitors [ 8 , 10 ], but is comparable to or higher than those of other laser-pyrolyzed carbon microsupercapacitors [ 9 , 23 , 42 ].…”

Section: Resultsmentioning

confidence: 85%

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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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Section: Resultsmentioning

confidence: 85%

“…As mentioned above, laser-pyrolyzed carbon can be easily patterned in a microscale based on laser direct writing. Many studies have demonstrated the use of this technique to fabricate microsupercapacitors [ 21 , 22 , 23 , 24 ]. The produced carbon exhibited a promising electrochemical performance [ 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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“…7,[21][22][23][24] Among these hybridizing with graphene based materials can give improved performance because of their large internal surface area for anchoring MOFs materials and excellent electrical conductivity for electron transport. [25][26][27][28][29][30][31] For example, Yaghi et al 18 showed as hybridizing MOFs with graphene has potential to enhance electrode materials for supercapacitor application. Zhou et al 32 reported Ni-MOFs@GO as pseudocapacitors materials with a capacitance of 1457.7 F g À1 at a current density of 1 A g À1 .…”

Section: Introductionmentioning

confidence: 99%

A 2D metal–organic framework/reduced graphene oxide heterostructure for supercapacitor application

Beka

et al. 2019

RSC Adv.

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“…While, a third classification includes the combination of both EDLC and pseudo materials and is termed ‘hybrid’ supercapacitor [ 7 , 8 , 9 , 10 ]. EDLC involves carbon-based materials [ 11 , 12 ] such as activated carbon [ 13 ], carbon nanotubes [ 14 ], and reduced graphene oxide/graphene [ 15 , 16 , 17 ] as active electrode materials, while the pseudo-capacitor is based on metal-oxides [ 18 ], -hydroxides [ 19 ], -sulfides [ 20 ], -nitrides [ 21 ], and conducting polymers [ 22 , 23 ]. Different morphologies of MnO 2 such as nanorods, flakes, and nanoflowers were grown on the surface of CNT in previous studies [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Functionalized Carbon Nanotube and MnO2 Nanoflower Hybrid as an Electrode Material for Supercapacitor Application

et al. 2021

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Functionalized carbon nanotube (FCNT) and Manganese Oxide (MnO2) nanoflower hybrid material was synthesized using hydrothermal technique as a promising electrode material for supercapacitor applications. The morphological investigation revealed the formation of ‘nanoflower’ like structure of MnO2 connected with FCNT, thus paving an easy path for the conduction of electrons during the electrochemical mechanism. A significant improvement in capacitance properties was observed in the hybrid material, in which carbon nanotube acts as a conducting cylindrical path, while the major role of MnO2 was to store the charge, acting as an electrolyte reservoir leading to an overall improved electrochemical performance. The full cell electrochemical analysis of FCNT-MnO2 hybrid using 3 M potassium hydroxide (KOH) electrolyte indicated a specific capacitance of 359.53 F g−1, specific energy of 49.93 Wh kg−1 and maximum specific power of 898.84 W kg−1 at 5 mV s−1. The results show promise for the future of supercapacitor development based on hybrid electrode materials, where high specific energy can be achieved along with high specific power and long cycle life.

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Fabrication and electrochemical evaluation of micro-supercapacitors prepared by direct laser writing on free-standing graphite oxide paper

Cited by 86 publications

References 58 publications

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

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

A 2D metal–organic framework/reduced graphene oxide heterostructure for supercapacitor application

Functionalized Carbon Nanotube and MnO2 Nanoflower Hybrid as an Electrode Material for Supercapacitor Application

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