研究目的
Investigating the effectiveness of nanoforest-like 3C–SiC/graphene film as electrode materials for supercapacitors.
研究成果
The nanoforest-like 3C–SiC/graphene films show high specific capacitance, good rate capability, and cycling stability, making them promising for electrochemical energy storage applications.
研究不足
The study focuses on the electrochemical performance of nanoforest-like 3C–SiC/graphene films in an aqueous electrolyte, and the scalability of the LCVD method for large-scale production is not discussed.
1：Experimental Design and Method Selection
Nanoforests of 3C–SiC/graphene films were prepared by laser chemical vapor deposition (LCVD) using hexamethyldisilane (HMDS) as a single source in H2 atmosphere.
2：Sample Selection and Data Sources
3C–SiC/graphene films were deposited on Si (110) single crystalline substrate. The electrochemical properties were measured in 0.5 M H2SO4 solution.
3：List of Experimental Equipment and Materials
Field emission scanning electron microscopy (FESEM; Quanta-250, FEI, Houston, USA; 20 kV), Raman spectrum (Invia, Renishaw, UK; 514.5 nm), Scan Transmission electron microscopy (STEM, TALOS F200S, USA), Transmission electron microscopy (TEM, JEOL JEM-2100, Tokyo, Japan; 200 kV), Electrochemical workstation (CHI 660e).
4：Experimental Procedures and Operational Workflow
The films were characterized by FESEM, Raman spectrum, STEM, and TEM. The electrochemical properties were measured by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS) methods.
5：Data Analysis Methods
The double layer capacitances (Cdl, mF/cm2) were calculated by using the equation of C = j/ν (j is the background current density in mF/cm2 and ν is the scan rate in V/s).
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Field emission scanning electron microscopy
Quanta-250
FEI
Observing the surface and cross-section morphology of deposited films.
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Transmission electron microscopy
JEOL JEM-2100
JEOL
Observing the micro-structure and phase of the deposited films.
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Raman spectrum
Invia
Renishaw
Evaluating the composition and phase of deposited films.
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Scan Transmission electron microscopy
TALOS F200S
Observing the 3D morphology of the nanoforest-like 3C–SiC/graphene film.
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Electrochemical workstation
CHI 660e
Investigating the capacitive performance of the films.
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