Electrode production method

PROBLEM TO BE SOLVED: To manufacture an electrode whose deterioration is suppressed due to great suppression of expansion and contraction even if occlusion and discharge of Li are repeated.SOLUTION: An electrode material 21 in a state where Li is occluded and expanded is finely crushed to produce finely crushed materials from which stress is removed, the finely crushed materials in the state where the stress is removed are mixed with each other to make arrangements of Li uniform, thereby manufacturing a negative electrode 12.