Single Crystallization of Layered Nickel-Rich Cathode Materials
Nickel-rich-manganese-cobalt oxide(NMC)ternary cathode materials are considered to be one of the most promising cathode materials for lithium-ion batteries due to their high specific capacity and high power.However,most of the current nickel-rich ternary layered materials are polycrystalline particles,and their volumetric energy density and cyclic stability are not satisfactory.Therefore,independent and well-dispersed single-crystal nickel-rich ternary layered materials(SC-NMCs)can be used as the best candidates to replace polycrystalline nickel-rich ternary cathodes.In this paper,we systematically review how to synthesize SC-NMCs and their corresponding relationship with the properties of single-crystal from the perspectives of precursor preparation,material sintering and lithium salt supplementation.Secondly,the performance advantages of SC-NMCs compared with polycrystalline materials are comprehensively summarized,especially the morphology without cracks between particles,which shows good cycling performance.Thirdly,in view of the disadvantages and challenges of the current SC-NMCs,the modification strategies of SC-NMCs,such as element doping,surface modification and double modification,are comprehensively introduced.This review puts forward innovative views on the synthesis and modification of SC-NMCs and provides directional guidance for the application and development of single-crystal nickel-rich ternary layered cathode materials for next-generation lithium-ion batteries.
NETL
NSTL
万方数据
