2016/05/13 by Jun Ma, Pu Hu, Guanglei Cui +1
Engineering · #Advancements in Battery Materials #Advanced Battery Materials and Technologies #Advanced Battery Technologies Research
paper · doi:10.1021/acs.chemmater.6b00948
Spinel LiNi 0.5 Mn 1.5 O 4 with high operating voltage (∼4.7 V vs Li/Li + ), high theoretical capacity of 148 mAh g –1, fast lithium ion diffusion kinetics, and potentially low cost is the most potential candidate material for high energy density LIBs used in plug-in hybrid electric vehicles and pure electric vehicles. However, the high operating voltage of LiNi 0.5 Mn 1.5 O 4 challenges the electrochemical stability of other components in the batteries and induces diverse interfacial side reactions, leading to irreversible capacity loss, poor cycling performance, and safety issues, especially at the elevated temperatures. Thus, a basic understanding of the intrinsic surface properties of LiNi 0.5 Mn 1.5 O 4 and the mechanism of interfacial interactions between each component in the electrochemical system is a critical requirement for developing substantial enhancements of LiNi 0.5 Mn 1.5 O 4 -based batteries. In this review, we summarize the surface/interface reactions and challenges in the whole cell system of LiNi 0.5 Mn 1.5 O 4 -based LIBs. Perspectives and strategies for LiNi 0.5 Mn 1.5 O 4 -based high energy density batteries used in PHEV/EVs are also proposed at last.