Patent ID: 7838154
Filing Date: 2010-11-23
Classification: C25D,H01M,Y02E

Abstract:
1. A negative electrode for a nonaqueous secondary battery having an active material layer containing particles of an active material, the active material layer having a metallic material which is deposited among the particles and is continuously filled between the active material particles over an entire thickness direction of the active material layer, the negative electrode having a large number of holes open on at least one side thereof and extending through the entire thickness of the active material layer, the holes open on a surface of the negative electrode having an opening diameter of 20 to 500 μm and the holes go through an entire thickness of the negative electrode, and the metallic material having a low capability of forming a lithium compound and having electroconductivity, wherein vacant spaces are formed such that the metallic material does not completely fill interstitial spaces between the particles, whereby the vacant spaces serve to relax the stress caused by volumetric changes of the active material particles accompanying charge and discharge cycles.