PENGARUH VARIASI WAKTU DAN SUHU PENCAMPURAN SERTA SUHU PENGERINGAN PADA LEMBAR KATODA LiFePO
TERHADAP KAPASITAS BATERAI ION LITHIUM
4
ABSTRAK
Telah dilakukan penelitian pembuatan baterai coin dengan variasi suhu dan waku pencampuran pada slurry katoda LiFePO4 serta variasi suhu pengeringan lembar
katoda LiFePO4. Material katoda merupakan campuran dari LiFePO4 : Super P :
PVDF dengan komposisi 85 : 10 : 5 dan DMAC 20 mL. Waktu dan suhu pencampuran divariasikan yaitu 3, 5 dan 7 jam pada suhu 29˚C dan 29, 50 dan 60˚C selama 3 jam dan variasi suhu pengeringan 80, 100 dan 120˚C selama 5 jam.
Lembaran katoda dibuat dengan menggunakan doctor blade. Pengujian karakteristik serbuk LiFePO4 dengan XRD, mikroskop optik dan SEM-EDX untuk
melihat morfologi lembaran katoda LiFePO4 dan pengujian kapasitas discharge
dengan charge/discharge. Hasil analisis menunjukkan bahwa variasi waktu pencampuran yang memiliki kapasitas tertinggi adalah sampel 7 jam yaitu 3,74 mAh/g. Sementara pada variasi suhu pencampuran, kapasitas tertinggi terdapat pada sampel 50˚C yaitu 5,81 mAh/g. Pada variasi suhu pengeringan kapasitas tertinggi terdapat pada sampel 80˚C yaitu 5,70 mAh/g.
Kata kunci : Baterai ion lithium, Lembar katoda, LiFePO4, Kapasitas
discharge
THE EFFECT OF TIME VARIATION, MIXING TEMPERATURE AND DRYING TEMPERATURE ON LiFePO4
LITHIUM ION BATTERIES CAPACITY
CATHODE SHEETS OF
ABSTRAC
A research on the fabrication of coin battery with the variation of mixing time and temperature at slurry cathode LiFePO4 and variation of drying temperature at
cathode sheets. The material of cathode was using a powder of LiFePO4 : Super P :
PVDF with composition 85 : 10 : 5 and 20 mL of DMAC. The mixing time was varied at 3, 5, 7 hour at 29˚C and the mixing temperature was varied at 29, 50, 60˚C for 3 hour and the drying temperature was varied of 80, 100, 120˚C for 5 hour. The sheets of cathode are made by using doctor blade process. The powder of LiFePO4
was analyzed by XRD. Morphology of the LiFePO4 cathode sheets was analyzed
by Microscope Optic and SEM. Discharge capacity was analyzed by charge/discharge. The result of this research showed that the variation of mixing time has the highest capacity at 7 hour-sampel is 3,75 mAh/g. Meanwhile, the variation of mixing temperature has the highest capacity at 50˚C sampel is 5,81 mAh/g. The variation of drying temperature has the highest capacity at 80˚C sampel is 5,70 mAh/g.
Key word : Lithium ion battery, Cathode sheets, LiFePO4, Discharge capacity.
