NEGATIVE ELECTRODE MATERIAL FOR LITHIUM BATTERY, METHOD FOR PRODUCING THE SAME, ELECTRODE AND BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a negative electrode material with which a lithium ion secondary battery large in charge/discharge and excellent in charge/discharge cycle characteristics can be prepared, and a method for producing the negative electrode material.SOLUTION: There are provided a negative electrode material for a lithium secondary battery and a method for producing the negative electrode material for a lithium secondary battery. The negative electrode material for a lithium secondary battery has a structure where metal particles are embedded in a carbon material. The metal particles contain at least one element M1 (tin or the like) selected from elements of metals capable of absorbing and desorbing lithium ions and at least one element M2 (cobalt or the like) selected from elements of metals absorbing and desorbing no lithium ions, and further contain 5-50 mass% of carbon, 3-25 mass% of oxygen and 0.1-3 mass% of nitrogen. The element M2 forms an alloy with the element M1.