Research progress in high voltage spinel LiNi 0.5Mn 1.5O 4 material

Abstract

Lithium-ion batteries are now considered to be the technology of choice for future hybrid electric and full electric vehicles to address global warming. LiCoO 2 has been the most widely used cathode material in commercial lithium-ion batteries. Since LiCoO 2 has economic and environmental issues, intensive research has been directed towards the development of alternative low cost, environmentally friendly cathode materials as possible replacement of LiCoO 2. Among them, spinel LiNi 0.5Mn 1.5O 4 material is one of the promising and attractive cathode materials for next generation lithium-ion batteries because of its high voltage (4.7 V), acceptable stability, and good cycling performance. Research advances in high voltage spinel LiNi 0.5Mn 1.5O 4 are reviewed in this paper. Developments in synthesis, structural characterization, effect of doping, and effect of coating are presented. In addition to conventional synthesis methods, several alternative synthesis methods are also summarized. Apart from battery performance, the application of spinel LiNi 0.5Mn 1.5O 4 material in asymmetric supercapacitors is also discussed.