Full metadata record
DC Field | Value | Language |
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dc.contributor.author | 유원철 | - |
dc.date.accessioned | 2019-11-26T07:50:44Z | - |
dc.date.available | 2019-11-26T07:50:44Z | - |
dc.date.issued | 2019-05 | - |
dc.identifier.citation | ELECTROCHIMICA ACTA, v. 304, Page. 210-220 | en_US |
dc.identifier.issn | 0013-4686 | - |
dc.identifier.issn | 1873-3859 | - |
dc.identifier.uri | https://www.sciencedirect.com/science/article/pii/S0013468619303913 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/114787 | - |
dc.description.abstract | For high performance of electrical double layer capacitors (EDLCs), a high specific surface area (SSA) and N-doping level, and small particle size of carbonaceous materials, have been believed to be crucial factors. However, there have been few reports on simultaneous study of the structure-properties relations of carbons and the electrochemical performances of EDLCs. Herein, we report the relationship between the structural properties of carbons, such as the SSA, N-doping, and particle size, and the electrochemical properties of EDLCs by using a series of well-defined carbons. Monodisperse and sizetunable resorcinol-formaldehyde carbon (RFC) spheres were synthesized and activated by hot CO2 treatment to increase the SSA up to 3958 m(2)/g (RFC_C390 sample). When the specific capacitances of the RFC spheres were plotted in terms of their SSAs, an almost perfect correlation (R-2 = 0.99) was observed, which confirmed the linear relationship between the specific capacitance and the SSA. In addition, N-doped melanin C (MC) spheres were synthesized and subsequently activated for N-doping effect. Activated MC (MC_C130), which exhibited similar SSA (2618 m(2)/g) and size (301 nm) but a different N-doping level (3.1%) compared with those (2793 m(2)/g, 312 nm, and 1.3%, respectively) of the activated RFC spheres (RFC_C120), displayed higher specific capacitance (288 F/g), capacitance retention (64%), and long term stability over 5000 cycles (93%) compared with those (260 F/g, 58%, and 90%, respectively) of the RFC counterparts. To observe the particle size effect, different sizes (98, 280, and 579 nm) of RFC spheres with similar SSAs (3981, 3958, and 3898 m(2)/g, respectively) and pore size distributions were prepared, such that the smallest RFC revealed the best EDLC performance in terms of specific capacitance (360 F/g), capacitance retention (70%), and long term stability over 5000 cycles (98%), all of which could be compared with the values reported in the literature. Furthermore, all of the Carbon samples were analyzed by using electrochemical impedance spectroscopy for confirming the structure-properties relations of carbon spheres with the electrochemical performances of EDLCs. (C) 2019 Elsevier Ltd. All rights reserved. | en_US |
dc.description.sponsorship | This work was supported by the Basic Science Research Program of the National Research Foundation of Korea (NRF-2016R1D1A1B03930258 and NRF-2018R1A6A1A03024231). | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | en_US |
dc.subject | Carbon sphere | en_US |
dc.subject | Electrical double layer capacitors (EDLCs) | en_US |
dc.subject | Surface area effect | en_US |
dc.subject | Size effect | en_US |
dc.subject | N-doping effect | en_US |
dc.title | Study of the structure-properties relations of carbon spheres affecting electrochemical performances of EDLCs | en_US |
dc.type | Article | en_US |
dc.relation.volume | 304 | - |
dc.identifier.doi | 10.1016/j.electacta.2019.02.121 | - |
dc.relation.page | 210-220 | - |
dc.relation.journal | ELECTROCHIMICA ACTA | - |
dc.contributor.googleauthor | Kim, Hee Soo | - |
dc.contributor.googleauthor | Abbas, Muhammad Awais | - |
dc.contributor.googleauthor | Kang, Min Seok | - |
dc.contributor.googleauthor | Kyung, Hyuna | - |
dc.contributor.googleauthor | Bang, Jin Ho | - |
dc.contributor.googleauthor | Yoo, Won Cheol | - |
dc.relation.code | 2019001730 | - |
dc.sector.campus | E | - |
dc.sector.daehak | COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E] | - |
dc.sector.department | DEPARTMENT OF CHEMICAL AND MOLECULAR ENGINEERING | - |
dc.identifier.pid | wcyoo | - |
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