[ABSTRAK
Untuk meningkatkan kemampuan baterai sekunder, pemahaman mengenaibahan elektroda dan elektrolit harus ditingkatkan. Bahan elektroda negatif yangbanyak digunakan adalah grafit, sedangkan elektroda positif yang banyakdigunakan adalah LiCoO2. Pada penelitian ini dilakukan pengamatanmikrostruktur LiCoO2 komersial. Pada LiCoO2 diberikan pembebanan( 5, 10 dan15 GPa), pemanasan (60oC, 150oC, dan 200oC) dan pemanasan secara in situ (25,60, 70, 75, 80, 90, 100 dan 115oC) yang selanjutnya dilakukan pengujiankristalografi menggunakan teknik difraksi sinar-x. Selanjutnya dilakukanrefinement terhadap data hasil difraksi sinar-x menggunakan GSAS-EXPGUI.Dari hasil refinement diperoleh data perubahan parameter kisi, occupancy, dandensity. Nilai occupancy, dan density semakin menurun dengan meningkatnyanilai pembebanan dan meningkatnya suhu pemanasan. Pada penelitian ini jugateramati adanya prefered orientation pada bidang (003) dan delithiasi yangditandai dengan penurunan nilai occupancy Li akibat pembebanan danpemanasan.
ABSTRACT
In order to increase the secondary battery?s ability, the understanding ofelectrode and electrolit has to be improved. The negative electrode material whichis commonly used is grafit, as for the positive electrode, it is LiCoO2. In thisresearch, microstructure LiCoO2 commercial observation will be done. OnLiCoO2, imposition ( 5,10 and 15 GPa), heating (60oC, 150oC, and 200oC), andheating with in situ (25, 60, 70, 75, 80, 90, 100 and 115oC) are given, and thencrystallography using x-ray diffraction technique is tested. Next, refinement to thedata of x-ray diffraction result is done by using GSAS-EXPGUI. The data of gridparameter, occupancy, and density are obtained from the result of refinement. Therate of occupancy and density become lower as the imposition?s rate and theheating temperature increase. In this research, there are also prefered orientationon field (003) and delithiasi which are marked with the decreasing of occupancyLi rate due to the imposition and heating., In order to increase the secondary battery’s ability, the understanding ofelectrode and electrolit has to be improved. The negative electrode material whichis commonly used is grafit, as for the positive electrode, it is LiCoO2. In thisresearch, microstructure LiCoO2 commercial observation will be done. OnLiCoO2, imposition ( 5,10 and 15 GPa), heating (60oC, 150oC, and 200oC), andheating with in situ (25, 60, 70, 75, 80, 90, 100 and 115oC) are given, and thencrystallography using x-ray diffraction technique is tested. Next, refinement to thedata of x-ray diffraction result is done by using GSAS-EXPGUI. The data of gridparameter, occupancy, and density are obtained from the result of refinement. Therate of occupancy and density become lower as the imposition’s rate and theheating temperature increase. In this research, there are also prefered orientationon field (003) and delithiasi which are marked with the decreasing of occupancyLi rate due to the imposition and heating.] |
T43264-Rhmatul Hidayati.pdf :: Unduh