Студенттер мен жас ғалымдардың «фараби әлемі» атты халықаралық ғылыми конференциясы
FABRICATION OF FLEXIBLE SUPERCAPACITOR
жүктеу/скачать 2,6 Mb. Pdf көрінісі
|
Сборник конф Фараби Әлемі 2023 химфак-печать
| FABRICATION OF FLEXIBLE SUPERCAPACITOR
FOR TEXTILE APPLICATION Manasheva V 1,2 . 1 Lathakumary Vijayan B., 1 Delattre R., 1,2 Djenizian T. 1 Al-Farabi Kazakh National University, 2 Ecole des Mines de Saint-Etienne manashevav@gmail.com Traditional supercapacitors (SC) are restricted to the shape of the device due to the rigid nature of the electrodes. New generation flexible and small SCs in wearable electronics are expected to be thin, light, transparent, and flexible. This article introduces a flexible planar supercapacitor on nickel fabric for textile application with superior charge storability. Nickel shows superior resistance to surface oxidation in the air as compared to copper. For this study, manganese oxide (IV) (MnO 2 ) is selected as the electrode material due to its high theoretical specific capacitance (≈1370 F/g), low cost, environmental friendliness, and non-toxicity. (a) Fabrication MnO 2 based supercapacitor. The electrode is fabricated with MnO 2 as the active material (Sigma Aldrich), carbon black (Sigma Aldrich), N-Méthyl-2-pyrrolidone (NMP) (Sigma Aldrich), and polyvinylidene difluoride (PVDF) (Sigma Aldrich). The materials are ground and made as slurry. Then the slurry is coated over nickel fabric through the Doctor blade method with 35 µm thickness, followed by drying at 55 0 C in an oven. Gel type polymer electrolyte is used to study the electrochemical characterization of the MnO 2 based SC. Electrolyte contains poly(vinyl alcohol) (PVA) electrolyte with lithium chloride (LiCl). SC is fabricated in a sandwich model with symmetric two (1cm 2 ) MnO 2 electrodes that are separated by gel polymer electrolyte. To study the electrochemical characterization, cyclic voltammetry (CV) was conducted at a scan rate of 100 mVꞏs -1 and achieved a potential window of 0.8 V. Charge-discharge cycling was run at 300 mA within a potential of 0.8 V, achieving an areal-specific capacitance is 380 µFꞏcm -2 . Electrochemical properties of a varying percentage of MnO 2 were studied, among that 40% of MnO 2 with 50% carbon black achieved superior areal-specific capacitance of 770 µFꞏcm -2 . (b) Fabrication PEDOT:PSS based supercapacitor. Another transparent, good conducting, and stretchable electrochemical material poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) (Sigma Aldrich) was used as an electrode material to fabricate flexible supercapacitor in sodium carboxymethyl cellulose (CMC) with sodium sulphate (Na 2 SO 4 ) and glycerin as an electrolyte. CV is conducted and a potential window of 1.6V was achieved. Charge- discharge cycling was run and 600 µFꞏcm -2 areal specific capacitance achieved at 300mA. Excellent electrochemical performances indicate that fabricated flexible supercapacitors show a promising future as a portable electrochemical energy storage devices. «Фараби Әлемі» атты студенттер мен жас ғалымдардың халықаралық конференциясы 288 жүктеу/скачать 2,6 Mb. Достарыңызбен бөлісу:
|