Pengaruh Variasi dan Konsentrasi Garam Natrium Terhadap Konduktivitas Ionik Solid Electrolyte Berbasis Graphene Oxide

Maulida, Mutiara Rizki (2025) Pengaruh Variasi dan Konsentrasi Garam Natrium Terhadap Konduktivitas Ionik Solid Electrolyte Berbasis Graphene Oxide. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Solid electrolyte berbasis Graphene Oxide (GO) merupakan alternatif yang lebih aman dibandingkan dengan elektrolit cair karena memiliki tingkat keamanan yang lebih baik. Penelitian ini dilakukan dengan memvariasikan GO dengan garam natrium sulfit, natrium nitrat, dan natrium klorida dengan tujuan untuk menganalisis pengaruh garam natrium terhadap karakteristik dan konduktivitas ionik solid electrolyte. Metode vacuum filtration dilakukan pada penelitian ini untuk menghasilkan membran solid electrolyte. Berdasarkan hasil X-Ray Diffraction (XRD) menunjukkan nilai d-spacing yang lebih lebar setelah penambahan garam natrium. Hasil Fourier Transform Infrared Spectroscopy (FTIR) menyatakan terjadinya ring opening atau pemotongan ikatan C-O-C menjadi C-O-H, menandakan peningkatan oksidasi melalui konversi gugus epoksida menjadi karbonil. Hasil Scanning Electron Microscopy (SEM) diperoleh bahwa dengan penambahan garam natrium membuat jarak antar lapisan semakin lebar. Hasil uji termal melalui Thermogravimetric Analysis (TGA) menunjukkan bahwa setelah penambahan garam natrium, membran mengalami penurunan massa lebih kecil pada setiap tahap pengujian, menandakan bahwa membran memiliki stabilitas termal lebih baik dibandingkan dengan tanpa penambahan garam natrium. Hasil Electrochemical Impedance Spectroscopy (EIS) menunjukkan adanya peningkatan nilai konduktivitas ionik pada solid electrolyte berbasis GO setelah penambahan garam natrium, dengan nilai terbaik pada konsentrasi 20 wt.% yakni sebesar 4,07x10-4 S/cm untuk GO-NaCl pada room temperature. Oleh karena itu, penambahan garam natrium pada solid electrolyte mendukung interaksi ion yang dengan GO sehingga dapat meningkatkan konduktivitas ionik.
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Graphene Oxide (GO)-based solid electrolyte is a safer alternative compared to liquid electrolytes due to its enhanced safety features. This study was conducted by varying GO with sodium salts including sodium sulfite, sodium nitrate, and sodium chloride, with the aim of analyzing the effect of sodium salts on the characteristics and ionic conductivity of the solid electrolyte. The vacuum filtration method was employed in this research to produce the solid electrolyte membrane. Based on the results of X-Ray Diffraction (XRD), a wider d-spacing was observed after the addition of sodium salts. Fourier Transform Infrared Spectroscopy (FTIR) results indicated the occurrence of ring opening or the cleavage of C-O-C bonds into C-O-H, signifying increased oxidation through the conversion of epoxide groups into carbonyl groups. Scanning Electron Microscopy (SEM) results showed that the addition of sodium salts increased the interlayer spacing. Thermal testing using Thermogravimetric Analysis (TGA) revealed that after the addition of sodium salts, the membranes experienced less mass loss at each testing stage, indicating better thermal stability compared to membranes without sodium salt addition. Electrochemical Impedance Spectroscopy (EIS) results demonstrated an increase in the ionic conductivity of the GO-based solid electrolyte after the addition of sodium salts, with the highest value observed at a concentration of 20 wt.%, reaching 4.07 × 10⁻⁴ S/cm for GO-NaCl at room temperature. Therefore, the addition of sodium salts to the solid electrolyte enhances ion interactions with GO, thereby improving ionic conductivity.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	garam natrium, graphene oxide, konduktivitas ionik, solid electrolyte, graphene oxide, ionic conductivity, sodium salt, solid electrolyte
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ165 Energy storage.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User:	Mutiara Rizki Maulida
Date Deposited:	25 Jul 2025 04:06
Last Modified:	25 Jul 2025 04:06
URI:	http://repository.its.ac.id/id/eprint/121249

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