LITHIUM SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To preclude abnormal separating of lithium and prevent collapse of a negative electrode board made of aluminum. SOLUTION: A lithium secondary battery 1 uses metal lithium to the material of negative electrode 5, and an electricity collecting electrode board 50 is made of single crystal aluminum. Single crystal aluminum is obtained through a crystallizing process such that a crucible containing aluminum is lowered in a temperature gradient furnace and cooled gradually.