研究目的
To investigate the application of Ni3S2@MWCNTs films as effective counter electrodes for dye-sensitized solar cells (DSSCs) and to study their nanostructure, crystalline structure, electrochemical activities, and electron-charge transfer resistance.
研究成果
The hydrothermal method successfully prepared Ni3S2@MWCNTs films, enhancing the effective surface area and reducing the charge-transfer resistance, leading to improved DSSC performance. The co-catalyst Ni3S2@MWCNTs film showed superior electrocatalytic activity and a power conversion efficiency of 7.48%.
研究不足
The study does not discuss the long-term stability of the Ni3S2@MWCNTs films under operational conditions or their performance under varying environmental conditions.
1：Experimental Design and Method Selection:
The study employed a hydrothermal process to grow Ni3S2 nanoparticles on MWCNTs and coat them onto conducting glass substrates.
2：Sample Selection and Data Sources:
MWCNTs were functionalized with carboxyl groups, and Ni3S2@MWCNTs films were prepared using a mixture of MWCNTs with NiSO4(H2O)6, NaOH, and thioacetamide in DI water.
3：List of Experimental Equipment and Materials:
Fluoride doped tin oxide glass substrates (FTO-glass), titanium IV isopropoxide solution, TiO2 PST-18NR and PST-400C, N719 dye solution, and a solar simulator system (Peccell, PE-L111, Japan).
4：Experimental Procedures and Operational Workflow:
The films were prepared by hydrothermal treatment at 170 °C for 24 h, washed with DI water, and dried at 85 °C. DSSCs were assembled using a semi-closed method with a liquid electrolyte.
5：Data Analysis Methods:
Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were used to study the electrochemical activities and charge transfer resistance, respectively.
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