More, Evanisia (2019) Efek Agen Presipitat Na2SO4 dan (NH4)H2PO4 Pada Ekstraksi Material Aktif Hematit (α–Fe2O3) Sebagai Anoda Beterai Ion Litium. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pada penelitian ini telah dilakukan analisis pengaruh penambahan konsentrasi Na2SO4 dan (NH4)H2PO4 pada sintesis hematit (α–Fe2O3) sebagai material aktif anoda dengan binder Kitosan-PVA untuk baterai ion litium. Kitosan diekstraksi melalui 3 tahap yakni deprotenasi, demineralisasi dan deasetilasi. Karakterisasi kitosan menggunakan FTIR dan dibandingkan dengan referensi. Derajat deasetilasi kitosan hasil ekstraksi sebesar 88%. α–Fe2O3 diekstraksi dari pasir besi asal Sulawesi Tenggara dengan penambahan agen presipitat menggunakan metode hidrotermal. α – Fe2O3 diekstraksi dengan melarutkan pasir besi dalam larutan HCl kemudian ditambahkan agen presipitasi dengan perbandingan 1:1 dengan variasi konsentrasi 0,10 M, 0,25 M, 0,50 M, 0,75 M dan 1,50 M. Hasil ekstraksi dikarakterisasi dengan XRD, PSA, dan SEM. Semakin besar konsentrasi yang digunakan ukuran partikel semakin besar. Morfologi α–Fe2O3 telah menunjukkan adanya bentuk nanoroud. Komposisi slurry anoda yang digunakan dengan perbandingan material aktif : binder : carbon black: adalah 6:1:1 (%wt). Karakterisasi performa baterai menggunakan EIS menghasilkan nilai Rct optimum pada konsentrasi 1,5 M sebesar 112Ω, koefisien difusi ion Lithium sebesar 2,53 x 10-14 cm2/s dan konduktivitas listrik sebesar 1,80 x 10-4 S/cm. Hasil CV menunjukan semakin besar konsentrasi agen presipitasi yang digunakan potensial reduksi yang dihasilkan makin bergeser ke arah kiri. Hasil kapasitas charge discharge ada di konsentrasi 1,5 M sebesar 230 mAh/g. Stabilitas baterai paling optimum ada pada konsentrasi 1,5 M.
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The research aims to analysis of effect consentration of addition presipitate agent Na2SO4 and (NH4)H2PO4 on α – fe2O3 shynthesis as active anode with chithosan-pva binder for lithium-ion battery. Chitosan was extracted using 3 processes, such as deproteination, demineralization, and deacetylation. Characterization of chitosan using FTIR and compared with references. The degree of deacetylation of chitosan was 88%. α – Fe2O3 was extracted from iron sand from Southeast Sulawesi by the addition of precipitate agents by the hydrothermal method. α – Fe2O3 was extracted by dissolving iron sand in HCl solution then added precipitation agents with a ratio of 1: 1 with variations in concentrations of 0,10 M, 0,25 M, 0,05 M, 7,5 M dan 1,50 M. The extraction was characterized by XRD, PSA, and SEM . The greater the concentration used, the larger the particle size. The morphology of α - Fe2O3 has shown a nanoroud form. The composition of the slurry anode used with the ratio of active material: binder: carbon black: is 6: 1: 1 (% wt). Characterization of battery performance using EIS produces the optimum Rct value at a concentration of 1.5 M of 112Ω, the diffusion coefficient of Lithium ion is 2.53 x 10-14 cm2/s and the electrical conductivity is 1.80 x 10-4 S/cm. The CV results show that the greater the concentration of precipitation agent used the reduction potential produced shifts to the left. The charge discharge capacity results at a concentration of 1.5 M at 230 mAh/g. The optimum battery stability is at 1.5 M concentration.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | pasir besi, baterai ion litium, hematit, anoda, kitosan-PVA, binder, konsentasi Na2SO4, (NH4)H2PO4, performa. |
| Subjects: | Q Science > QC Physics Q Science > QC Physics > QC173.4.C63 Composite materials |
| Divisions: | Faculty of Natural Science > Chemistry > 47101-(S2) Master Thesis |
| Depositing User: | Evanisia More |
| Date Deposited: | 20 Jul 2026 06:46 |
| Last Modified: | 20 Jul 2026 06:46 |
| URI: | http://repository.its.ac.id/id/eprint/67631 |
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