TY  - JOUR
AU  - Laušević, Petar
AU  - Pejović, Predrag
AU  - Žugić, Dragana
AU  - Kochnev, Yuri
AU  - Apel, Pavel
AU  - Laušević, Zoran
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7620
AB  - A novel self-supporting carbon thin film flexible supercapacitor electrode with high volumetric and areal capacitance was developed. The increase in capacitance performance is achieved by introducing channels across the carbon thin film using ion-track technology. In the first step of the electrode synthesis, latent tracks are inscribed in the starting polyimide (Kapton) foil by irradiation with 253 MeV Kr ions. Next, macropores in the form of cylindrical channels are formed by selective chemical etching with NaOCl along the ion tracks, creating ion-track polymer. With subsequent carbonization and activation of the ion-track polymer, activated ion-track carbon is produced. A range of samples are obtained by varying the chemical etching time of the irradiated polymer. In addition to channel formation the chemical etching time influences the composition of surface functional groups. The best results are obtained by chemical etching for 40 min, the thickness of the sample is 21 A mu m with channel density 2.4 x 10(6) cm(-2) and average channel diameter 430 nm. Beside cylindrical macro channels this material is mainly microporous with 0.62 nm pore diameter and shows the highest areal (494 mF/cm(2)), volumetric (224 F/cm(3)) and gravimetric (178 F/g) capacitance. As a consequence of channel formation, the rate capability of the supercapacitor was also increased.
T2  - Journal of Materials Science: Materials in Electronics
T1  - Improving thin film flexible supercapacitor electrode properties using ion-track technology
VL  - 29
IS  - 9
SP  - 7489
EP  - 7500
DO  - 10.1007/s10854-018-8740-x
ER  - 

@article{
author = "Laušević, Petar and Pejović, Predrag and Žugić, Dragana and Kochnev, Yuri and Apel, Pavel and Laušević, Zoran",
year = "2018",
abstract = "A novel self-supporting carbon thin film flexible supercapacitor electrode with high volumetric and areal capacitance was developed. The increase in capacitance performance is achieved by introducing channels across the carbon thin film using ion-track technology. In the first step of the electrode synthesis, latent tracks are inscribed in the starting polyimide (Kapton) foil by irradiation with 253 MeV Kr ions. Next, macropores in the form of cylindrical channels are formed by selective chemical etching with NaOCl along the ion tracks, creating ion-track polymer. With subsequent carbonization and activation of the ion-track polymer, activated ion-track carbon is produced. A range of samples are obtained by varying the chemical etching time of the irradiated polymer. In addition to channel formation the chemical etching time influences the composition of surface functional groups. The best results are obtained by chemical etching for 40 min, the thickness of the sample is 21 A mu m with channel density 2.4 x 10(6) cm(-2) and average channel diameter 430 nm. Beside cylindrical macro channels this material is mainly microporous with 0.62 nm pore diameter and shows the highest areal (494 mF/cm(2)), volumetric (224 F/cm(3)) and gravimetric (178 F/g) capacitance. As a consequence of channel formation, the rate capability of the supercapacitor was also increased.",
journal = "Journal of Materials Science: Materials in Electronics",
title = "Improving thin film flexible supercapacitor electrode properties using ion-track technology",
volume = "29",
number = "9",
pages = "7489-7500",
doi = "10.1007/s10854-018-8740-x"
}

Laušević, P., Pejović, P., Žugić, D., Kochnev, Y., Apel, P.,& Laušević, Z.. (2018). Improving thin film flexible supercapacitor electrode properties using ion-track technology. in Journal of Materials Science: Materials in Electronics, 29(9), 7489-7500.
https://doi.org/10.1007/s10854-018-8740-x

Laušević P, Pejović P, Žugić D, Kochnev Y, Apel P, Laušević Z. Improving thin film flexible supercapacitor electrode properties using ion-track technology. in Journal of Materials Science: Materials in Electronics. 2018;29(9):7489-7500.
doi:10.1007/s10854-018-8740-x .

Laušević, Petar, Pejović, Predrag, Žugić, Dragana, Kochnev, Yuri, Apel, Pavel, Laušević, Zoran, "Improving thin film flexible supercapacitor electrode properties using ion-track technology" in Journal of Materials Science: Materials in Electronics, 29, no. 9 (2018):7489-7500,
https://doi.org/10.1007/s10854-018-8740-x . .

TY  - JOUR
AU  - Laušević, Zoran
AU  - Apel, Pavel Yu
AU  - Krstić, Jugoslav B.
AU  - Blonskaya, Irina V.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5702
AB  - Activation effects on carbon films, derived from commercial aromatic polyimide films (Kapton, DuPont), in CO2 atmosphere at 1203 K on capacitance properties were studied. Two thicknesses of polyimide films were used: 7 and 25 gm. Pore formation during the activation process progresses in two steps due to the existence of a denser surface layer and a more porous core material. In the first step micropores are opening in the dense surface region of the material with average pore diameter smaller than 1 nm. During the second step, mesopores start opening, while micropore volume remains constant with the average micropore diameter of over 1 nm, producing bimodal texture. The first step finishes after 30 min for the thinner samples while for the thicker samples it finishes after 60 mm of activation. As a consequence of such textural changes during activation, the thicker sample has a maximum areal capacitance of 0.35 F/cm(2). The thinner sample activated for 30 min has a maximum volumetric capacitance of 220 F/cm(3) and achieves a maximum gravimetric capacitance of 240 F/g when the texture becomes bimodal after 240 min of activation. These results confirm that activation of carbonized Kapton films gives promising electrode materials for supercapacitors. (C) 2013 Elsevier Ltd. All rights reserved.
T2  - Carbon
T1  - Porous carbon thin films for electrochemical capacitors
VL  - 64
SP  - 456
EP  - 463
DO  - 10.1016/j.carbon.2013.07.098
ER  - 

@article{
author = "Laušević, Zoran and Apel, Pavel Yu and Krstić, Jugoslav B. and Blonskaya, Irina V.",
year = "2013",
abstract = "Activation effects on carbon films, derived from commercial aromatic polyimide films (Kapton, DuPont), in CO2 atmosphere at 1203 K on capacitance properties were studied. Two thicknesses of polyimide films were used: 7 and 25 gm. Pore formation during the activation process progresses in two steps due to the existence of a denser surface layer and a more porous core material. In the first step micropores are opening in the dense surface region of the material with average pore diameter smaller than 1 nm. During the second step, mesopores start opening, while micropore volume remains constant with the average micropore diameter of over 1 nm, producing bimodal texture. The first step finishes after 30 min for the thinner samples while for the thicker samples it finishes after 60 mm of activation. As a consequence of such textural changes during activation, the thicker sample has a maximum areal capacitance of 0.35 F/cm(2). The thinner sample activated for 30 min has a maximum volumetric capacitance of 220 F/cm(3) and achieves a maximum gravimetric capacitance of 240 F/g when the texture becomes bimodal after 240 min of activation. These results confirm that activation of carbonized Kapton films gives promising electrode materials for supercapacitors. (C) 2013 Elsevier Ltd. All rights reserved.",
journal = "Carbon",
title = "Porous carbon thin films for electrochemical capacitors",
volume = "64",
pages = "456-463",
doi = "10.1016/j.carbon.2013.07.098"
}

Laušević, Z., Apel, P. Y., Krstić, J. B.,& Blonskaya, I. V.. (2013). Porous carbon thin films for electrochemical capacitors. in Carbon, 64, 456-463.
https://doi.org/10.1016/j.carbon.2013.07.098

Laušević Z, Apel PY, Krstić JB, Blonskaya IV. Porous carbon thin films for electrochemical capacitors. in Carbon. 2013;64:456-463.
doi:10.1016/j.carbon.2013.07.098 .

Laušević, Zoran, Apel, Pavel Yu, Krstić, Jugoslav B., Blonskaya, Irina V., "Porous carbon thin films for electrochemical capacitors" in Carbon, 64 (2013):456-463,
https://doi.org/10.1016/j.carbon.2013.07.098 . .

TY  - JOUR
AU  - Laušević, Zoran
AU  - Apel, Pavel Yu.
AU  - Blonskaya, Irina V.
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4499
AB  - A porous glassy carbon membrane was obtained by first producing ion tracks in a polymeric Kapton film by irradiation with high energy krypton or xenon ions. Pores are formed by selective chemical etching along the ion tracks, and then the film was converted to glassy carbon by heat treatment at 1000 degrees C under an inert atmosphere. The process yields a self-supported glassy carbon thin membrane. The density of the pores in the membrane depends on the ion irradiation fluence, and the length, diameter and shape of the pores could be controlled by the ion energy and etching procedure. (C) 2011 Elsevier Ltd. All rights reserved.
T2  - Carbon
T1  - The production of porous glassy carbon membranes from swift heavy ion irradiated Kapton
VL  - 49
IS  - 14
SP  - 4948
EP  - 4950
DO  - 10.1016/j.carbon.2011.06.084
ER  - 

@article{
author = "Laušević, Zoran and Apel, Pavel Yu. and Blonskaya, Irina V.",
year = "2011",
abstract = "A porous glassy carbon membrane was obtained by first producing ion tracks in a polymeric Kapton film by irradiation with high energy krypton or xenon ions. Pores are formed by selective chemical etching along the ion tracks, and then the film was converted to glassy carbon by heat treatment at 1000 degrees C under an inert atmosphere. The process yields a self-supported glassy carbon thin membrane. The density of the pores in the membrane depends on the ion irradiation fluence, and the length, diameter and shape of the pores could be controlled by the ion energy and etching procedure. (C) 2011 Elsevier Ltd. All rights reserved.",
journal = "Carbon",
title = "The production of porous glassy carbon membranes from swift heavy ion irradiated Kapton",
volume = "49",
number = "14",
pages = "4948-4950",
doi = "10.1016/j.carbon.2011.06.084"
}

Laušević, Z., Apel, P. Yu.,& Blonskaya, I. V.. (2011). The production of porous glassy carbon membranes from swift heavy ion irradiated Kapton. in Carbon, 49(14), 4948-4950.
https://doi.org/10.1016/j.carbon.2011.06.084

Laušević Z, Apel PY, Blonskaya IV. The production of porous glassy carbon membranes from swift heavy ion irradiated Kapton. in Carbon. 2011;49(14):4948-4950.
doi:10.1016/j.carbon.2011.06.084 .

Laušević, Zoran, Apel, Pavel Yu., Blonskaya, Irina V., "The production of porous glassy carbon membranes from swift heavy ion irradiated Kapton" in Carbon, 49, no. 14 (2011):4948-4950,
https://doi.org/10.1016/j.carbon.2011.06.084 . .