To suppress the deterioration of battery characteristics caused by repeated charges and the discharge of a lithium-ion secondary battery at a high output.
In a positive electrode current collector 11 of the lithium-ion secondary battery 10, an ion movement regulating part 28 to regulate the movement of lithium ions in a face direction orthogonal to the thickness direction of the positive electrode current collector 11 between a positive electrode and a negative electrode is formed. This ion movement regulating part 28 is formed of a plurality of walls of openings 30 installed in the thickness direction so that a positive electrode active material 12 is filled. In the ion movement regulating part 28, the walls to form the openings in a face of the positive electrode current collector may be formed closely or erectly, or a through-hole as an opening may be formed and formed of by the walls of the through-hole in the face of a flat-plate current collector. This ion movement regulating part may be installed at least at one or more of the positive electrode current collector 11, a negative electrode current collector 14, and a separator 19.
SASAKI GEN
KONDO YASUHITO
| JPH08293298A | 1996-11-05 | |||
| JP2007048738A | 2007-02-22 | |||
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