| 초록 |
Recently due to increased RF communication module and tracking system, GPS, smard grid, high energy density and high power characteristic of batteries are required. So new power source connected in parallel by lithium primary battery having high energy density and lithium secondary battery having high power are required. In this study, batteris having high power characteristic were desighed by chang NP ratio of lithium ion batteries on limited voltage range (2.5~3.67V). Cell was composed of NCA as cathode, artificial graphite as anode and 1.2M LiPF6 in EC/EMC/DMC/DEC (30/10/40/20, V/V) as electrolyte. Electrochemical properties of designed cell were evaluated. Electrochemical Impedance analysis, charge- discharge properties, Cycle life test and rate capability of cell were tested. |
