LITHIUM ION CELL AND ELECTRODE THEREOF

摘要

Provided is a lithium ion cell having a high output density and a high energy density so as to allow for favorable use in an automotive vehicle or other applications. An electrode (21) of a lithium ion cell (11) in which an active substance (23) is disposed on front and rear surfaces of a sheet-form collector (22) has a plurality of equidistantly spaced parallel grooves and ridges (24) extending linearly on the front and rear surfaces of the collector (22), the grooves and ridges being provided so as to differ in phase between the front and rear surfaces. The depth (d) of the grooves and ridges (24) is equal to or greater than the width (w1) of openings of the grooves and ridges (24). The active material (23) is provided as a filled portion (23a) for filling the interior of the grooves and ridges (24); and a covering portion (23b) for covering the surfaces of the collector (22), the covering portion being integrated with the filling portion (23a).