ZNO-MNO COMPOSITE ANODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND SYNTHESIS METHOD THEREOF

摘要

PURPOSE: A negative electrode active material is provided to provide a negative electrode for lithium secondary batteries with excellent electric performance and to be simply manufactured. CONSTITUTION: A negative electrode active material comprises a composite particle which is chemically coupled with ZnO and MnO. The composite particle has an average particle diameter of 100 nm or less. A manufacturing method of a negative electrode active material comprises a step of molding a composite particle which is chemically coupled with ZnO and MnO by treating ZnMn2O4 powder in an inert or reduction atmosphere. The heat treatment is conducted at 600-900 C for 4-10 hours. The ZnMn2O4 powder is prepared by a solvothermal synthesis method or a co-precipitation method. [Reference numerals] (AA) ZnMn2O4 powder; (BB) ZnO-MnO complex; (CC) Thermal treatment under inactive or reduction atmosphere(at 600-900C for 4-10 hours)