Research progress of nano-modified materials for positive electrode of lithium-ion battery

Abstract

Energy is an essential element in human production and life. In the context of today's energy shortage and increasingly serious environmental problems, electric vehicles have gradually begun to occupy the mainstream market, and improving the performance of electric vehicle batteries has become a hot topic for researchers. Today's electric cars generally use lithium-ion batteries. In this paper, the research progress of nano-scale material modification of lithium-ion battery cathode materials was explored, especially the modification of LiFePO4 and NCM ternary materials. For LiFePO4, the preparation process of nanoscale LiFePO4 was explored. Carbon nano-modified materials, such as nano-graphite, CNCs, and modified LiFePO4 cathode materials are also mentioned. For NCM ternary materials, the oxide nanomaterials, lithium salt nanomaterials, and carbon nanomaterials modified ternary cathode materials were explored. Among them, the oxide nanomaterials include Al2O3 and SiO2, the lithium salt nanomaterials include LiAlO2, LiNbO3, Li2TiO3, and Li2ZrO3, and the carbon nanomaterials include CNTs, graphene and graphene-oxide SnO2. After investigation, it was found that these nano-scale modified materials can improve the electrochemical performance of lithium-ion battery cathode materials.