FABRIKASI LITHIUM TITANATE TERDOPING Al (Li4Ti4,975Al0,025O12) DAN
STUDI PENGARUH KETEBALAN LEMBARAN ELEKTRODA PADA
SEL SETENGAH BATERAI ION LITHIUM
ABSTRAK
Sintesis serbuk dan pembuatan lembaran anoda Li4Ti5O12 doping Al (x=0,025)
telah berhasil dilakukan. Sintesis serbuk LTO doping Al dilakukan dengan metode solid state sedangkan pembuatan lembaran anoda dilakukan dengan metode coating doctor blade. Pembuatan lembaran dilakukan dengan memvariasi ketebalan coating 100µm, 200µm, 300µm dan 400µm. untuk mengetahui pengaruh ketebalan coating terhadap performa sel baterai. Pengujian yang dilakukan meliputi analisa fasa dengan menggunakan EIS, CV dan CD. Hasil analisa XRD menunjukkan ada dua fasa yang tebentuk, yaitu fasa Lithium
Titanium Oxide (Li1.333Ti1.667O4) sebanyak 75,6 % dan fasa Rutile, syn (TiO2)
sebanyak 24,4%. Hasil EIS menunjukkan bahwa semakin tebal lapisan coating maka konduktifitas sampel semakin besar. Selanjutnya hasil CV menunjukkan bahwa sampel 100µm, 200µm dan 300µm memiliki puncak oksidasi/reduksi yang tajam sedangkan sampel 400µm memiliki puncak yang melebar. Sedangkan kapasitas sel baterai semakin menurun seiring dengan meningkatnya ketebalan coating, kapasitas sel terbaik yang diperoleh adalah kapasitas Charge sebesar 137,08 mAh/g dan kapasitas discharge sebesar 134,3 mAh/g.
Kata Kunci: Baterai, Anoda, Li4Ti5O12, doping Al, Performa elektrokimia,
Al DOPED LITHIUM TITANATE FABRICATION (Li4Ti4,975Al0,025O12) AND
STUDY EFFECT OF COATING THICKNESS ELECTRODE SHEET
ON THE HALF CELL LITHIUM ION BATTERY
ABSTACT
The effect of coating thickness of Al doped Li4Ti5O12 (LTO) sheet on the
electrochemical performance of battery cells have been investigated. 0.025 mol Al doped LTO powder was synthesized by solid state reaction method, while the manufacture of the anode sheet was made by Doctor Blade coating method. Manufacture of sheet was done by varying the thickness of the coating (100um, 200um, 300um and 400um) to determine the effect of coating thickness on the electrochemical performance of the battery cell. Testing was conducted on the analysis of phase with XRD and electrochemical performance was conducted by using EIS, CV and CD. XRD analysis showed that there are two phases that were
formed i.e Lithium Titanium Oxide phase (Li1.333Ti1.667O4) and rutile phase, syn
(TiO2) as much as 75.6% and 24.4% respectively. EIS results showed that the
thicker the coating layer, the conductivity of the sample become greater. Furthermore, the results indicate that the sample CV 100 um, 200 um and 300um have a sharp oxidation/reduction peak while 400um has wide redox peaks. While the specific capacity and specific power of the half cell battery decreases with the increasing of coating thickness. The best cell capacity is obtained by sample with 100 um thickness with specific charge capacity of 137.08 mAh/g and specific discharge capacity of 134.3 mAh / g.
Keywords: Battery, Anode, LTO, Al doped, electrochemical performance,
