슈퍼커패시터용 그래핀-산화아연 전극의 급속열처리에서 수소의 영향
Effect of Hydrogen in Rapid Thermal Annealing on the Graphene-Zinc Oxide Electrode for Supercapacitor
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
With recent demand for the renewable energy resources, we conducted a research on the energy conversion and storage device of supercapacitor. The hybrid graphene-zinc oxide(GZO) electrodes for the supercapacitors (SCs) were fabricated and investigated. To increase the electrical conductivity of the GZO electrode, the rapid thermal annealing(RTA) in Ar/H2(10%) atmosphere was applied and the effect was examined by comparing it with RTA at Ar atmosphere. In Raman spectroscopy, the electrodes annealed at 400℃ in Ar/H2 atmosphere showed a lower ratio of D/G peak than that of annealed at Ar atmosphere, and had a larger specific capacitance(Sc) in the cyclic voltammetry(CV), and a lower the equivalent series resistance(ESR) in the electrochemical impedance spectroscopy(EIS). The reason seems to come from the better mixing of the graphene and zinc oxide by the RTA in Ar/H2(10%).
Abstract
With recent demand for the renewable energy resources, we conducted a research on the energy conversion and storage device of supercapacitor. The hybrid graphene-zinc oxide(GZO) electrodes for the supercapacitors (SCs) were fabricated and investigated. To increase the electrical conductivity of the GZO electrode, the rapid thermal annealing(RTA) in Ar/H2(10%) atmosphere was applied and the effect was examined by comparing it with RTA at Ar atmosphere. In Raman spectroscopy, the electrodes annealed at 400℃ in Ar/H2 atmosphere showed a lower ratio of D/G peak than that of annealed at Ar atmosphere, and had a larger specific capacitance(Sc) in the cyclic voltammetry(CV), and a lower the equivalent series resistance(ESR) in the electrochemical impedance spectroscopy(EIS). The reason seems to come from the better mixing of the graphene and zinc oxide by the RTA in Ar/H2(10%).
참고문헌 (11)
- Edmund Samuel, "Electrosprayed graphene decorated with ZnO nanoparticles for supercapacitors", J. ALLOY. COMPD, 741, pp.781~791 (2018)
- V. Rajeswari, "Synthesis and Characterization Of Graphene-Zinc Oxide Nanocomposite Electrode Material For Supercapacitor Applications", Mater. Today. Proc, 4, pp.645~652 (2017)
- W. K. Chee, "Flexible Graphene-Based Supercapacitors: A Review", J. Phys. Chem. C, 120, pp.4153~4172 (2016)
- Shao Ing Wong, "Towards enhanced energy density of graphene-based supercapacitors:Current status, approaches, and future directions", J. Power. Sources, 396, pp.182~206 (2018)
- Hwee Ling Poh, "Graphenes prepared by Staudenmaier, Hofmann and Hummers methods with consequent thermal exfoliation exhibit very different electrochemical properties", Nanoscale, 4, pp.3515~3522 (2012)
- Hyeon-Jin Shin, "Efficient Reduction of Graphite Oxide by Sodium Borohydride and Its Effect on Electrical Conductance", Adv. Funct. Mater, 19, pp.1987~1992 (2009)
- Héctor A. Becerril, "Evaluation of Solution-Processed Reduced Graphene Oxide Films as Transparent Conductors", ACS Nano, 2(3), pp.463~470 (2008)
- Xiaosi Zhou, "Spin-Coated Silicon Nanoparticle", Graphene Electrode as a Binder-Free Anode for High-Performance Lithium-Ion Batteries, 2012, pp.5(12), 845~853
- Duy-Thach Phan, "Effects of rapid thermal annealing on humidity sensor based on graphene oxide thin films", Sens. Actuators. B, 220, pp.1050~1055 (2015)
- Jovana Prekodravac, "The effect of annealing temperature and time on synthesis of graphene thin films by rapid thermal annealing", Synth. Met, 209, pp.461~467 (2015)
- Han Gil Na, "Development of defects in ZnO", RGO composites under wet chemical synthesis, 2018, pp.156, 549~555