Analisis Pengaruh Temperatur terhadap Solid Polymer Electrolyte (SPE) Berbasis Pati Jagung dan Lanthanum Nitrate pada Superkapasitor

Wijanarko, Nadia Parwaty (2024) Analisis Pengaruh Temperatur terhadap Solid Polymer Electrolyte (SPE) Berbasis Pati Jagung dan Lanthanum Nitrate pada Superkapasitor. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Superkapasitor membutuhkan elektrolit sebagai media transportasi ion di antara anoda dan katoda. Solid polymer electrolyte (SPE) dapat menjadi salah satu pertimbangan karena tidak mudah terbakar, keamanan tinggi, fleksibilitas yang baik, dan stabilitas termal yang baik. Pada penelitian ini dilakukan sintesis SPE berbahan dasar pati jagung dan garam tambahan berupa lanthanum nitrate (LaNO3)3 dengan metode solution casting. Konsentrasi pada (LaNO3)3 yaitu 0wt.%, 4wt.%, 8wt.%, 16wt.%, 20wt.%, 25wt.%. Dari hasil sintesis SPE dilakukan uji karakterisasi material x-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR), dan differential scanning calorimetry (DSC). Hasilnya menunjukkan bahwa konsentrasi 25wt.% semakin amorf ditandai dengan nilai derajat kristalinitas yang rendah yaitu 19,59%, terjadi pengurangan intensitas pada CH2 ditandai dengan peningkatan pada C-O-C, nilai titik leleh (Tm) dan glass transition (Tg) yang rendah sebesar 68 oC dan 26,39 oC. Uji performa electrochemical impedance spectroscopy (EIS) pada SPE dan superkapasitor dilakukan pada room dan elevated temperature. Nilai konduktivitas ionik SPE dengan garam La 25% pada temperature 70 oC terbesar yaitu 0,135 mS/cm. Superkapasitor dengan konsentrasi 25wt.% memiliki konduktivitas ionik terbesar yaitu 9,71 x 10-5 mS/cm pada room temperature dan 5,89 x 10-2 mS/cm pada temperatur 70 oC. Uji cyclic voltammetry (CV) pada superkapasitor menunjukkan nilai specific capacitance terbesar pada konsentrasi 25wt.% sebesar 3,11 x 10-5 F/g. Uji galvanostatic charge-discharge (GCD) pada superkapasitor menunjukkan nilai energy density dan power density maksimal pada konsentrasi 25wt.% sebesar 0,059 Wh/kg dan 6417,49 W/kg. Pengembangan SPE sebagai elektrolit menjanjikan untuk superkapasitor dapat menghasilkan penyimpanan energi yang lebih efisien dan efektif di masa depan.
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Electrolytes are required as an ion transport medium between the anode and cathode in supercapacitors. Because of its non-flammability, excellent safety, flexibility, and thermal stability, Solid Polymer Electrolyte (SPE) can be considered. Through the solution casting process, SPE was synthesized in this study utilizing cornstarch as the basis material and an additional salt, lanthanum nitrate (LaNO3)3. The concentrations of (LaNO3)3 were 0%, 4%, 8%, 16%, 20%, and 25%. X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), and Differential Scanning Calorimetry (DSC) were used to characterize the synthesized SPE. The results show that the 25 wt.% concentration is increasingly amorphous characterized by a low degree of crystallinity value of 19.59%, a reduction in CH2 intensity indicated by an increase in C-O-C, and low melting point (Tm) and glass transition (Tg) values of 68 oC and 26.39 oC. Performance experiments of supercapacitors and SPEs using electrochemical impedance spectroscopy (EIS) were conducted at room temperature and at elevated temperatures. At 70 °C, the ionic conductivity value of SPE containing La 25% salt was the highest, measuring 0.135 mS/cm. The highest ionic conductivity is found in supercapacitors with a 25wt.%, which is 9.71 x 10-5 mS/cm at room temperature and 5.89 x 10-2 mS/cm at 70 oC. The supercapacitor's cyclic voltammetry (CV) test offers the highest specific capacitance value at a 25wt.% concentration of 3.11 x 10-5 F/g. Using a galvanostatic charge-discharge (GCD) test on supercapacitors, the highest energy density and power density values of 0.059 Wh/kg and 6417.49 W/kg were observed at a concentration of 25wt.%. The development of SPE as a promising electrolyte for supercapacitors can result in more efficient and effective energy storage in the future.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	superkapasitor, solid polymer electrolyte, konduktivitas ionik, pati jagung, lanthanum nitrate, supercapasitor, solid polymer electrolyte, solution casting, elevated temperature, ionic conductivity, corn starch
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ165 Energy storage.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30101-(S2) Master Thesis
Depositing User:	Nadia Parwaty Wijanarko
Date Deposited:	19 Feb 2024 04:28
Last Modified:	19 Feb 2024 04:28
URI:	http://repository.its.ac.id/id/eprint/107465

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