研究目的
To enhance the electrochemical performance of fiber-based supercapacitors by developing a simple method to fabricate PEDOT:PSS/V2O5 hybrid fibers and investigating their properties.
研究成果
The PEDOT:PSS/30 wt% V2O5 hybrid fiber exhibits excellent electrochemical performance, high energy density in organic electrolyte, good flexibility, and cyclic stability, making it promising for wearable electronics. The simple fabrication method supports scalable production.
研究不足
The method may not be suitable for high V2O5 concentrations due to aggregation issues. The fibers have low breaking strength, limiting direct weaving applications. Conductivity decreases with V2O5 addition.
1：Experimental Design and Method Selection:
The study involves fabricating hybrid fibers by directly injecting a mixture of PEDOT:PSS and V2O5 into a capillary, followed by drying and treatment. Electrochemical performance is evaluated using cyclic voltammetry, galvanostatic charge/discharge, and impedance spectroscopy.
2：Sample Selection and Data Sources:
Samples include pure PEDOT:PSS fibers and hybrid fibers with 15 wt%, 30 wt%, and 50 wt% V2O
3：Data are obtained from structural characterization (SEM, XRD), electrical conductivity measurements, and electrochemical tests. List of Experimental Equipment and Materials:
Materials include isopropanol, acetone, DMSO, V2O5, EG, Clevios PH1000, PVDF-co-hexafluoropropylene, EMIMBF4, DMF, H2SO4, PVA. Equipment includes syringe pump, FESEM (SU8000), XRD (RIGAKU D/Max-2550PC), Keithley 2400 source meters, electrochemical workstation (CHI 660E), battery test system (CT 2001A).
4：Experimental Procedures and Operational Workflow:
Preparation of spinning dope, wet-spinning or capillary injection, fiber treatment with EG, assembly of FSCs with aqueous or organic electrolytes, and performance testing.
5：Data Analysis Methods:
Specific capacitance, energy density, and power density are calculated from CV and GCD data using standard equations. Statistical analysis includes measuring fiber diameters and conductivity.
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X-ray diffractometer
RIGAKU D/Max-2550PC
RIGAKU
Used to obtain XRD patterns of samples using Cu Kα radiation.
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current source meter
Keithley 2400
Keithley
Used for electrical conductivity measurements via van der Pauw method.
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syringe pump
LSP02-1B
Used to apply pressure for injecting polymer solution during wet-spinning process.
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field emission scanning electron microscopy
SU8000
Used to observe the morphology of fibers after sputter coating with gold.
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electrochemical workstation
CHI 660E
CH Instruments Inc.
Used for electrochemical tests including CV, GCD, and EIS.
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battery program controlling test system
CT 2001A
China-Land Co., Ltd
Used for cycling performance measurements.
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