NEGATIVE ELECTRODE FOR LITHIUM SECONDARY CELL, LITHIUM SECONDARY CELL USING THE SAME, AND METHOD FOR MANUFACTURING NEGATIVE ELECTRODE FOR LITHIUM SECONDARY CELL

摘要

A lithium secondary cell negative electrode includes: a collector (12) and an active material layer (14) formed on the collector (12). The active material layer (14) has a plurality of negative electrode active material pieces (16) arranged on the collector(12). Each of the negative electrode active material pieces (16) is formed by an oxide having a first region (18) having a relatively high oxygen concentration and a plurality of second regions (20) having a lower oxygen concentration than the first region (18). The first region (18) extends from the bottom of each of the negative electrode active material pieces (16) in the direction apartfrom the surface of the collector. The second regions (20) are arranged to alternately sandwich the both sides of the first region (18).