Wibowo, Alvalo Toto (2020) Pengaruh Doping Fluorine Dan Temperatur Kalsinasi Pada Material Li4ti5o12/C Dengan Metode Solid State Terhadap Performa Elektrokimia Anoda Baterai Ion Lithium. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Anoda baterai Li4Ti5O12 merupakan bahan alternatif pengganti grafit sebagai bahan anoda pada umumnya. Anoda Li4Ti5O12 memiliki keunggulan tegangan operasi lebih stabil dari grafit yang tidak dapat digunakan dalam kondisi high rate power dan dimensi grafit berubah ketika proses charging pertama kali. Penambahan (doping) Fluorine pada anoda Li4Ti5O12 dapat meningkatkan performa elektrokimia pada baterai. Dalam penelitian ini dilakukan proses sintesis dan penambahan variasi F (0,1, 0,15 dan 0,2 mol) ke dalam anoda Li4Ti5O12 dengan metode solid state reaction menggunakan teknik ball milling. Li4Ti5O12 dilakukan proses kalsinasi dengan variasi temperatur 700, 750 dan 800°C. Li4Ti5O12 dilapisi dengan karbon dengan menggunakan gas asetilene sehingga terbentuk Li4Ti5O12/C. Hasil uji XRD diketahui bahwa Li4Ti5O12/C doping F telah berhasil disintesis sesuai dengan JCPDS card No.49-0207. Temperatur optimal yang bisa digunakan untuk mensintesis Li4Ti5O12/C adalah 750°C, melebihi temperatur tersebut (800°C) terdapat pengotor berupa TiO2. Hasil SEM menunjukkan morfologi material anoda Li4Ti5O12/C. Pada temperatur kalsinasi 700 dan 750°C terlihat partikel LTO berbentuk butir tak beraturan, berukuran nanometer dengan persebaran yang homogen. Namun pada temperatur kalsinasi 800°C terjadi aglomerasi sehingga partikel melekat satu sama lainnya dan membesar, hal ini mempengaruhi performa elektrokimia dari sampel. Performa elektrokimia dari baterai coin cell bisa didapat dari pengujian cyclic voltammetry (CV), charge/discharge (CD) dan electrochemical impedance spectroscopy (EIS). Hasil uji CV didapatkan pola puncak yang tajam pada variasi LTO 700°C doping 0,15F dengan nilai tegangan anodik sebesar 1,6598 V dan tegangan katodik sebesar 1,1589 V. Uji CD didapatkan hasil nilai spesifik discharge capacity sebesar 310,11 mAhg-1 pada variasi 750° doping 0.1F. Uji EIS didapatkan hasil optimum pada LTO/C 750°C doping 0,1F dengan nilai resistansi elektrolit dan kontak antar elektroda (Rs) terkecil sebesar 13,809 Ω dan charge transfer resistance Rct sebesar 628,72 Ω.
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Li4Ti5O12 battery anode is an alternative material to replace graphite as an anode material in general. The Li4Ti5O12 anode has the advantage of more stable operating voltage than graphite. Graphite cannot be used in high rate power conditions and the dimensions of the graphite change during the first charging process. The addition of Fluorine to the Li4Ti5O12 anode can improve the electrochemical performance of the battery. In this research, the synthesis and addition of F (0.1, 0.15 and 0.2 moles) were added to the Li4Ti5O12 anode with the solid state reaction method using ball milling technique. Li4Ti5O12 calcination process carried out with variations in temperature of 700, 750 and 800°C. Li4Ti5O12 is coated with carbon using acetylene gas to form Li4Ti5O12/C. XRD test results are known that Li4Ti5O12/C doping F has been successfully synthesized according to JCPDS card No.49-0207. The optimal temperature that can be used to synthesize Li4Ti5O12/C is 750°C, above that temperature (800°C) there is an impurity in the form of TiO2. SEM results show the morphology of the Li4Ti5O12/C anode material. At calcination temperatures of 700 and 750°C the Li4Ti5O12/C particles had irregular sphere shaped with nanometer size and homogeneous distribution. However, at a calcination temperature of 800°C agglomeration occurred, so that the particles adhere to each other and enlarge. This condition affects the electronic performance of the sample. The electrochemical performance of coin cell batteries can be obtained from cyclic voltammetry (CV), charge/discharge (CD) and electrochemical impedance spectroscopy (EIS) tests. CV test results obtained a sharp peak pattern on variations of the 700°C doped 0.15F with an anodic voltage value of 1.6598 V and a cathodic voltage of 1.1589 V. The CD test obtained the specific value of the discharge capacity of 310.11mAhg-1 at a variation of 750°C doped 0.1F. The EIS test found optimum results at Li4Ti5O12/C 750°C doped 0.1F with the lowest electrolyte resistance and contact between electrodes (Rs) of 13,809 Ω and charge transfer resistance of (Rct) of 628,72 Ω.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | RTMt 621.312 42 Wib p-1 |
| Uncontrolled Keywords: | Anoda Li4Ti5O12, Ball Mill, Doping F, Temperatur Kalsinasi |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2921 Lithium cells. |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 27101-(S2) Master Thesis |
| Depositing User: | Alvalo Toto Wibowo |
| Date Deposited: | 07 Mar 2025 03:41 |
| Last Modified: | 07 Mar 2025 03:41 |
| URI: | http://repository.its.ac.id/id/eprint/74315 |
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