Cathode and a cathode active material plate for a lithium secondary battery and method for manufacturing these

摘要

The present invention relates to a cathode and a cathode active material plate for a lithium secondary battery, and the production method thereof. There is a feature of the present invention in that grooves consisting of a concave portion and having an infinite form (for example, an infinite cell-like shape) in a planar view are formed in a principal surface of the cathode active material plate.

主权项

1. A production method of a cathode active material plate which is a plate-like member containing cathode active material of a lithium secondary battery comprising:
an agglomeration step wherein a granular agglomerated object is formed by using a first slurry containing a transition metal compound which is a raw material of said cathode active material, a forming step wherein a formed object in a shape of a thin plate is formed by using a second slurry containing said agglomerated object, and a plurality of randomly formed grooves consisting of a concave portion in a planar view are formed in a principal surface of the formed object by drying the formed object, and a firing step wherein said cathode active material plate is obtained by firing said formed object.