PENGARUH VARIASI DOPING SI (0≤X≤0,06) PADA KATODA LiFeSiXP1-XO4/C TERHADAP MIKROSTRUKTUR DAN SIFAT KONDUKTIVITAS LISTRIK

Haf, Fairuzal Khalisha (2019) PENGARUH VARIASI DOPING SI (0≤X≤0,06) PADA KATODA LiFeSiXP1-XO4/C TERHADAP MIKROSTRUKTUR DAN SIFAT KONDUKTIVITAS LISTRIK. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Material komposit katoda LiFeSixP1-xO4/C dengan doping ion Si x = 0, 0,01, 0,03, dan 0,06 telah berhasil disintesis dengan metode solid-state reaction menggunakan bahan dasar Li2CO3, Fe2O3, SiO3, C6H12O6, (NH4)2HPO4. Pengujian yang dilakukan meliputi karakterisasi morfologi dengan XRD, PSA, SEM, serta pengujian konduktivitas listrik menggunakan EIS. Berdasarkan hasil pengujian, diperoleh dua fasa pada masing-masing variasi penambahan doping, yaitu Olivine dan Lithium Ferro Silicate. Namun, pada variasi tanpa doping diperoleh dua fasa, yaitu Olivine dan Nasicon. Hasil karakterisasi morfologi menunjukkan terbentuknya fasa Olivine dengan struktur kristal orthorombik pada semua variasi serta adanya puncak kristalin yang bergeser ke arah kiri atau sudut yang lebih kecil seiring bertambahnya variasi doping ion Si. Hasil karakterisasi konduktivitas listrik dengan EIS menunjukkan bahwa nilai konduktivitas listrik terbesar adalah 1,16 × 10⁻⁵ S/cm pada konsentrasi doping x = 0, sedangkan konduktivitas listrik terendah sebesar 1,12 × 10⁻⁷ S/cm pada konsentrasi doping x = 0,03.
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Active cathode material of LiFePO4 with Si ion doped with x = 0, 0,01, 0,03, and 0,06 has successfully synthesized. This material synthesized by a solid-state reaction method and using mineral elements such as Li2CO3, Fe2O3, SiO3, C6H12O6, (NH4)2HPO4. LiFeSiXP1-XO4/C cathode composite materials were characterized using X-ray Diffraction (XRD), Particle Size Analyzer (PSA), Scanning Electron Microscope (SEM), and electrical conductivity with EIS (Electrochemical Impedance Spectroscopy). Based on observation by XRD have shown that the material consists of two phase on all of consentration doping. That were Olivine and Lithium Ferro Silicate. But cathode without doping have shown two phase consists of Olivine and Nasicon. The morphology analysis showed the Olivine phase was formed with orthorombic crystal structure in each variation and there was a crystal peak indication that shift to the left . From the results of the electrical conductivity of the material obtained the highest electrical conductivity value of cathode composite was 1.16 x 10-05 S/cm without consentartion doping and the lowest electrical conductivity value was 1.12 x 10-07 S/cm at x = 0,03 variation.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Kata Kunci: Doping, Konduktivitas Listrik, Lithium Ferro Silicate, Morfologi
Subjects:	Q Science > QC Physics > QC173.4.C63 Composite materials Q Science > QC Physics > QC610.3 Electric conductivity
Divisions:	Faculty of Natural Science > Physics > 45201-(S1) Undergraduate Thesis
Depositing User:	Fairuzal Khalisha Haf
Date Deposited:	20 Jul 2026 03:35
Last Modified:	20 Jul 2026 03:35
URI:	http://repository.its.ac.id/id/eprint/65271

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