有色设备

In recent years, lithium-ion batteries have become an integral part of portable electronics and electric vehicles. LiNi_0.5Mn1.₅O₄(LiNi_0.5Mn_1.5O₄), as a positive material, has attracted much attention due to its high energy density (650W·h·kg^-1), high operating voltage (4.7V), low manufacturing cost and good security. However, the LNMO positive electrode has the problems of poor cycling performance and capacity degradation at high temperature. Surface coating technology is considered to be a promising solution system. In this paper, the research progress of LNMO cathode coating is reviewed from the aspects of coating materials and methods.