Porous carbon thin films for electrochemical capacitors
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.
Source:
Carbon, 2013, 64, 456-463Publisher:
- Oxford : Pergamon-Elsevier Science Ltd
Funding / projects:
- Physics and Chemistry with Ion Beams (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45006)
- Nanostructured Functional and Composite Materials in Catalytic and Sorption Processes (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45001)
- Joint Institute for Nuclear Research (JINR), Dubna, Russian Federation
- Ministry of Education and of the Republic of Serbia
DOI: 10.1016/j.carbon.2013.07.098
ISSN: 0008-6223
WoS: 000324898600050
Scopus: 2-s2.0-84883597733
Collections
Institution/Community
IHTMTY - JOUR AU - Laušević, Zoran AU - Apel, Pavel Yu AU - Krstić, Jugoslav AU - Blonskaya, Irina V. PY - 2013 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/1299 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. PB - Oxford : Pergamon-Elsevier Science Ltd 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 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.", publisher = "Oxford : Pergamon-Elsevier Science Ltd", 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.,& Blonskaya, I. V.. (2013). Porous carbon thin films for electrochemical capacitors. in Carbon Oxford : Pergamon-Elsevier Science Ltd., 64, 456-463. https://doi.org/10.1016/j.carbon.2013.07.098
Laušević Z, Apel PY, Krstić J, 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, 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 . .