Patent ID: 7122272

Claim:
A non-aqueous electrolyte secondary cell comprising: a cathode employing a cathode active material containing a compound of the olivinic structure having the formula Li x Fe 1−y M y PO 4 , wherein M is at least one selected from the group consisting of Zn, Al, Ga, Mg, and, with 0.05≦x≦1.2 and 0≦y≦0.8, and wherein the cathode has a width; an anode having a width; and an electrolyte solution; said cathode, anode and the electrolyte solution being housed in a container, wherein the amount of said electrolyte solution is adjusted to provide a void in said container of not less than 0.14 cc and not larger than 0.21 cc per 1 Ah of the cell capacity, and wherein a difference t between the width of the anode and the width of the cathode is 0.05 mm to 0.2 mm.