Iron oxide supercapacitor of high volumetric energy and power density using binder-free supersonic spraying and self-healing rGO
- Authors
- Kim, Taegun; Samuel, Edmund; Park, Chanwoo; Aldalbahi, Ali; El-Newehy, Mohamed; Kang, Yoonmook; Lee, Hae-Seok; Yoon, Sam S.
- Issue Date
- 15-5월-2022
- Publisher
- ELSEVIER SCI LTD
- Keywords
- < p> Fe2O3/rGO sheets< /p> Supersonic spraying; Supercapacitor; Exfoliation
- Citation
- CERAMICS INTERNATIONAL, v.48, no.10, pp.13684 - 13694
- Indexed
- SCIE
SCOPUS
- Journal Title
- CERAMICS INTERNATIONAL
- Volume
- 48
- Number
- 10
- Start Page
- 13684
- End Page
- 13694
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/141729
- DOI
- 10.1016/j.ceramint.2022.01.250
- ISSN
- 0272-8842
- Abstract
- Iron oxide (Fe2O3) nanoparticles and reduced graphene oxide (rGO) sheets were supersonically sprayed onto a nickel substrate to fabricate flexible supercapacitors. The supersonic impact velocity was adjusted by varying the air chamber pressure from 2 to 6 bar, which facilitated the self-healing of Stone-Wall defects in rGO sheets. Supersonic spraying caused exfoliation of the rGO sheets, which in turn increased the surface area and adherence of the Fe(2)O(3 & nbsp;)nanoparticles. The optimal case exhibited a specific capacitance of 1.44 F.cm(-2) at a current rate of 1.5 mA.cm(-2) and the energy density was 14.23 mW.cm(-3) at 250 mW.cm(-3). The width of the potential window increased to 1.4 V, implying a significant increase in the energy storage capability. The energy density of the supersonically sprayed Fe2O3/rGO electrode also showed no signs of deterioration even when the increased current density interfered with the electrode performance.
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Collections - Graduate School of Energy and Environment (KU-KIST GREEN SCHOOL) > Department of Energy and Environment > 1. Journal Articles
- College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
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