Pengaruh Ketebalan Katoda LiFePO4 terhadap Variasi Komposisi dan Ketebalan Anoda Mesocarbon Microbead (MCMB) pada Kapasitas Baterai Ion Lithium

Abstract

A research has been done about the manufactured of lithium ion batteries. The materials that used were of LiFePO4 powders as cathode filler, MCMB as anode filler, Super P as additives carbon, PvDf as matrix and DMAC as solvent. The composition of LiFePO4 cathode sheet the consisted of 85 % LiFePO4, 10 % Super P and 5 % PvDf in DMAC solvent with different thickness of 100 μm, 150 μm and 300 μm. The same composition of MCMB anode sheet as LiFePO4 cathode sheet with varied thickness of 100 μm and 150 μm and varied composition of 85 : 10 : 5 and 80 : 13 : 7 with a thickness of 150 μm. The electrode sheets prepared by using sheet casting based on doctor blade and assembling process of batteries cells by using stacking method with prismatic batteries model. The batteries used liquid electrolytes was 1M LiPF6 and polyolefin seperator. The analysis of crystal structure on active material powders were examined by using XRD, surface morphology and particle size on active material powder and morphology LiFePO4 cathode sheet analyzed by using SEM, surface morphology of the electrode sheets by using Optical Microscope and battery capacity by BST8-10A30V. The results of research showed that the highest capacity is 300 μm cathode thickness and the smallest is 100 μm thickness. The influence of varied composition for MCMB anode, the composition of 80 : 13 : 7 has higher specific capacity at cathode thickness of 100 μm, 150 μm and 300 μm with each has specific capacity is 69,65 mAh/gr, 73,61 mAh/gr and 81,93 mAh/gr. Each battery has efficiency above 98 %. The varied thickness of MCMB anode, so the thickness of 100 μm has a higher specific capacity at cathode thickness of 100 μm, 150 μm and 300 μm with each has specific capacity is 79,10 mAh/gr, 82,54 mAh/gr and 88 mAh/gr. The efficiency of each battery above 99 %. The highest battery capacity and efficiency at 300 μm cathode thickness reached 88 mAh/gr with MCMB anode composition of 85 : 10 : 5 at 100 μm thickness.