High-capacity positive electrode active material and lithium secondary battery comprising same

摘要: The present invention relates to a high-capacity lithium secondary battery which comprises layered manganese oxides and spinel that exhibit high irreversible capacity when the is overcharged at voltage, activated voltage of 4.45V or higher on positive electric potential basis, thereby providing additional for utilization 3V region enabling have uniform profile over entire SOC region. According invention, mixture electrode active materials containing oxides, charged improving safety, preventing low output caused by sudden drop in specific region, thus widening an available safety.