Development of high power lithium-ion batteries: Layer Li[Ni_(0.4)Co_(0.2)Mn_(0.4)]O_2 and spinel Li[Li_(0.1)Al_(0.05)Mn_(1.85)]O_4

摘要

Layer LiINi_(0.4)Co_(0.2)Mn_(0.4)]O_2 and lithium excess spinel Li[Li_(0.1)Al_(0.05)Mn_(1.85)]O_4 were compared as positive electrode materials for high power lithium-ion batteries. Physical properties were examined by Rietveld refinement of X-ray diffraction pattern and scanning electron microscopic studies. From continuous charge and discharge tests at higher currents and different temperature environments using 3Ah class lithium-ion batteries, it was found that both materials presented plausible battery performances such as rate capability, cyclability at 60℃ at elevated temperature, and low temperature properties as well.