The Study on Size Effect in Layered Structure Cathode Material for Fast Charge in LIBs

摘要

Together with mobile electronic devices, electrified vehicles require to improve the performance of current cutting edge lithium-ion batteries. Among the factors indicating battery performance, a charging time getting more important as the battery size gets larger. In order to reduce charging time, de-intercalation property of positive electrode (PE) and intercalation property of negative electrode must be satisfied simultaneously under increased charging current. Spinel and olivine materials were much studied for high rate PE materials however those materials have the limitation of lower energy density compared to layered structure one. In this study, we investigated the size effect of layered PE materials on the charge characteristics. LiCoO[2] and LiNi[0.6]Co[0.2]Mn[0.2]O[2] are evaluated with various test methods. The size effect of each chemistry is investigated with two different sizes of 5 um and 10 um, respectively. The details of evaluated results will be presented at the meeting.