- Nb5Sb4 METHODS FOR MANUFACTURING Nb-Sb INTERMETALLIC COMPOUND ELECTRODE MATERIALS FOR SECONDARY BATTERY INCLUDING COMPOUND MANUFACTURED THEREBY AND Li-ION OR Na-ION SECONDARY BATTERY COMPRISING THE SAME

摘要

The present invention, (a) mixing the niobium (Nb) powder and the antimony (Sb) powder: and (b) applying the mechanical energy to the mixed powder, the niobium-antimony intermetallic compound (Nb ₅ Sb ₄ ) A method for preparing a niobium-antimony intermetallic compound comprising a step of manufacturing. According to a method for preparing a compound according to the present invention, a ball milling method, which is a simple solid synthesis method, is used without a complicated and inefficient process such as a chemical method. When the niobium-antimony intermetallic compound can be produced simply and efficiently, and when the niobium-antimony intermetallic compound prepared by the above method is used as a negative electrode active material of a lithium secondary battery, an existing lithium alloy-based electrode for lithium secondary battery It is possible to solve problems such as the shortage of life due to volume expansion, which is a disadvantage of the material, and maintain a high capacity, so that it has a high initial efficiency and can realize a lithium secondary battery system with high capacity and excellent cycle life, and also electrochemical with lithium. By using a pretreatment reaction, the reactivity with sodium is improved, and it can be used as a negative electrode material for a high-capacity sodium secondary battery.