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Fabrication of Graphene/Poly(styrenesulfonic acid-g-aniline) Composites for High Performance Supercapacitor Electrodes
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, Jin Woo | en |
dc.contributor.author | Jo, Jae Woong | - |
dc.contributor.author | Kim, Kyung Tae | - |
dc.contributor.author | Jo, Won Ho | - |
dc.date.accessioned | 2016-03-07T08:47:27Z | - |
dc.date.available | 2016-03-07T08:47:27Z | - |
dc.date.issued | 2015-12 | - |
dc.identifier.citation | 2015 International Chemical Congress of Pacific Basin Societies, December 15-20, 2015, Honolulu, Hawaii | - |
dc.identifier.uri | https://hdl.handle.net/10371/95647 | - |
dc.description.abstract | Polyaniline (PANI) as a potential candidate for supercapacitor electrode has high theoretical
specific capacitance of about 2000 F/g. However, PANI itself suffers from poor solubility in common solvents, which restricts fabrication of supercapacitor electrodes directly from PANI. In our previous report, we synthesized a water-soluble and self-doped conducting polymer, poly(styrenesulfonic acid)-graft-polyaniline (PSSA-g-PANI), to overcome the solubility problem of PANI. When PSSA-g-PANI is added into graphite in ethanol, it is realized that the graft copolymer exfoliates graphite into graphene layers to form in-situ composite of graphene/PSSA-g-PANI, because PANI in PSSA-g-PANI is strongly physisorbed onto graphene surface via strong interaction while PSSA in PSSA-g-PANI enhances the solubility in ethanol. To the best of our knowledge, this is the only PANI/graphene composite fabricated by direct exfoliation method. Compared to other fabrication methods for PANI/graphene composites such as in-situ polymerization and electrodeposition, the direct exfoliation method provides high quality of graphene layers without degrading the sp2 structure because graphite is directly used as a precursor without chemical treatment, and also minimizes the fabrication step by simply mixing graphite and the polymer. As a consequence, PSSA-g-PANI/graphene composite is easily fabricated by a solution process and used directly for supercapacitor electrodes.When the capacitance of the composite was measured by the Galvanostatic method, the composite exhibits high specific capacitance of 767 F/g at 0.5 A/g, which is among the highest value of supercapacitor electrodes based on PANI/graphene composites. This high value is attributed to high specific area of graphene and high pseudo-capacitance of PANI. Furthermore, PSSA-g-PANI/graphene composite retains 82% of its initial capacitance after 1000 cycles, indicating that the composite has high electrochemical stability. | - |
dc.language.iso | en | - |
dc.title | Fabrication of Graphene/Poly(styrenesulfonic acid-g-aniline) Composites for High Performance Supercapacitor Electrodes | en |
dc.type | Conference Paper | - |
dc.contributor.AlternativeAuthor | 이진우 | - |
dc.contributor.AlternativeAuthor | 조재웅 | - |
dc.contributor.AlternativeAuthor | 김경태 | - |
dc.contributor.AlternativeAuthor | 조원호 | - |
dc.description.srnd | OAIID:oai:osos.snu.ac.kr:snu2015-01/104/0000001236/15 | - |
dc.description.srnd | ADJUST_YN:N | - |
dc.description.srnd | EMP_ID:A004558 | - |
dc.description.srnd | DEPT_CD:445 | - |
dc.description.srnd | CITE_RATE:0 | - |
dc.description.srnd | FILENAME:_?_댄?ㅽ?1217_하와이학회_이진우.pdf | - |
dc.description.srnd | DEPT_NM:재료공학부 | - |
dc.description.srnd | CONFIRM:Y | - |
dc.identifier.srnd | 2015-01/104/0000001236/15 | - |
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