Pratiwi, Vania Mitha (2014) Kinerja Elektrokimia Nanokomposit Fe3O4/C Sebagai Anoda Pada Baterai Ion-Lithium. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Tujuan dari penelitian ini yaitu untuk meneliti nanokomposit Fe3O4/C
sebagai bahan anoda baterai ion lithium dan mengevaluasi kinerja elektrokimia
nano komposit Fe3O4/C baik secara eksperimen maupun teoritis. Nanopartikel
Fe3O4 disintesis dari oksidasi besi dalam air menggunakan continous direct
current (CDC) dan pule direct current (PDC). Nanokomposit Fe3O4/C disiapkan
dengan dua metode: (1) nanopartikel dicampur dengan sukrosa dan dikarbonisasi
pada 500ºC dibawah kondisi campuran gas 5% H2 dalam N2 dan (2) nanopartikel
dicampur dengan carbon black. Kinerja elektrokimia dari kompoit dievaluasi
dengan electrochemical impedance spectroscopy (EIS) dan cyclic voltammetry
(CV). diameter rata-rata partikel Fe3O4 sekitar 18,7 nm dan 20 nm. Luas
permukaan spesifik dari nanokomposit Fe3O4 /C yang dibuat dengan
menggunakan arus CDC dan PDC pada metode karbonisasi (metode 1) sebesar
112,93 m2/g dan 111,58 m2/g. Sedangkan untuk arus CDC dan PDC pada metode
pencampuran biasa (metode 2) didapatkan luas permukaan spesifik sebesar 48,34
m2/g dan 40,77 m2/g. Analisa EIS menunjukkan bahwa konduktifitas dari
komposit Fe3O4/C secara PDC lebih rendah daripada secara CDC baik pada
metode 1 maupun metode 2. Luas permukaan spesifik yang lebih rendah
memberikan konduktifitas yang lebih baik. Analisa cyclic voltammetry beberapa
siklus menunjukkan adanya daerah grafik anodik dan katodik dari metode 2 secara
PDC dan CDC memberikan pola grafik CV yang sama. Nilai optimum diperoleh
dari nanokomposit Fe3O4/C 8:1:1 sebesar 438 Ω (charge ransfer) dan 1510 Ω
(difusi ion) dengan arus CDC, sedangkan untuk arus PDC sebesar 274 Ω (charge
ransfer) dan 1260 Ω (difusi ion). Nilai kapasitas optimum sebesar 4,407995 F/g
pada variabel nanokomposit Fe3O4/C 6:2:2. ============================================================================================ The objective of this work is to investigate Fe3O4 /C composite as an
electrochemical capacitor. Fe3O4 nanoparticles were synthesized by oxidation of
iron in water using either constant direct current (CDC) or pulse direct current
(PDC). Fe3O4 /C composite was prepared by two methods: (1) the nanoparticles
were mixed with sucrose and carbonized at 500 oC under the mixture of 5% H2 in
N2, and (2) the nanoparticles were mixed with carbon black. The electrochemical
performance of the composite was evaluated by electrochemical impedance
spectroscopy (EIS), and cyclic voltammetry (CV). The diameters of Fe3O4
particles obtained using CDC and PDC methods were approximately 18.7 nm and
20 nm, respectively. The specific surface area of composite with method (1) using
PDC was 112.93 m2/g and using CDC was 111.58 m2/g, and method (2) using
PDC was approximately 48.345 m2/g and using CDC was 40.77 m2/g. EIS
analysis showed that the conductivity of the composite prepared by method (1)
using CDC lower than that using PDC and method (2) gave the same result. The
lower specific surface area gave better conductivity. Cyclic Voltammogram
analysis for some cycles showed that the area under the anodic-cathodic curve for
the both methods (1) and (2) using PDC or CDC did not give the good result and
for method (2) gave the same area. This is affected by diameter particles of
composite.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | RTK 660.297 Pra k 3100014054426 |
| Uncontrolled Keywords: | nanokomposit Fe3O4/C, karbonisasi, electrochemical impedance spectroscopy, cyclic voltammetry, Comsol Multiphysic, Fe3O4 /C nanocomposite, carbonization, electrochemical impedance spectroscopy, cyclic voltammetry, Comsol Multiphysic simulation |
| Subjects: | T Technology > TP Chemical technology > TP255 Electrochemistry, Industrial. |
| Divisions: | Faculty of Industrial Technology > Chemical Engineering > 24101-(S2) Master Thesis |
| Depositing User: | - Davi Wah |
| Date Deposited: | 13 Jan 2020 08:14 |
| Last Modified: | 13 Jan 2020 08:19 |
| URI: | http://repository.its.ac.id/id/eprint/72515 |
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