Multilayered-Secondary battery including electrodes with different thickness

摘要

PURPOSE: A multilayered secondary battery is provided to improve rapid charging and discharging characteristic by employing two kinds or more of negative and positive electrodes with different thickness. CONSTITUTION: A multilayered secondary battery includes positive and negative electrodes with different thickness. An N/P ratio of the negative/positive electrodes is 110-130. The thickness of the positive and negative electrodes is controlled by the content of each electrode active material. The content of negative active material of a thick layer in a negative electrode with different thickness is 90-75 weight and the content of negative active material of a thin layer is 10-25 weight%.