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URN etd-0209118-145445 Statistics This thesis had been viewed 143 times. Download 0 times. Author Jing-tang Su Author's Email Address No Public. Department Chemical Engineering Year 2017 Semester 1 Degree Master Type of Document Master's Thesis Language English Page Count 81 Title Effects of double-bonded and triple-bonded electrolyte additive on mesocarbon microbeads anode materials Keyword electrolyte additive lithium ion battery lithium ion battery electrolyte additive Abstract In this study, electrolyte additive propargyl methacrylate (PMA), which has both double and triple-bonded can accelerate the mesocarbon microbeads (MCMB) surface to form the solid electrolyte interphase (SEI). The scanning electron microscopy showed that the SEI film of the anode was more dense with increasing PMA concentration. Cyclic voltammetry shows that PMA has a high reduction potential in the electrolyte, during the first cycle of charge and discharge, the PMA can be reduced and decomposed to form SEI on the surface of the electrode before electrolyte decomposition, thereby prevent the contact between the electrode and the electrolyte. 0.5wt% PMA has the best electrochemical performance at room temperature and 55℃. Compared with 326.21 mAhg-1 of the MCMB electrode without electrolyte additive, it has 352.29 mAhg-1 remained after 100 cycles of charge/discharge, which showed excellent cycling performance. At 55℃, MCMB half-cell with and without 0.5wt% PMA has 343.0 mAhg-1 and 328.48 mAhg-1. Hence PMA can stabilize the growth of the SEI film and have excellent electrochemical performance at room temperature and 55℃. Advisor Committee Chiung-chen Huang - advisor
Jeng-yu Lin - advisor
Files Date of Defense 2018-01-22 Date of Submission 2018-02-21