POSITIVE ELECTRODE FOR ALKALINE STORAGE BATTERIES AND ALKALINE STORAGE BATTERY

摘要

A positive electrode for alkaline storage batteries that enables to improve the active material utilization rate, while suppressing the self-discharge. The positive electrode for alkaline storage batteries includes a support having conductivity, and a positive electrode active material adhering to the support. The positive electrode active material includes particles of a nickel oxide. The particles of the nickel oxide include a first particle group having a particle diameter of 20 μm or more, and a second particle group having a particle diameter of less than 20 μm. The first particle group includes a first component with cracks, and a second component without cracks. The proportion of the first particle group in the particles of the nickel oxide is 15 vol % or more, and the proportion by number of the first component in the first particle group is 15% or more.

主权项

1. A positive electrode for alkaline storage batteries, comprising:
a support having conductivity, and a positive electrode active material adhering to the support; the positive electrode active material including particles of a nickel oxide; the particles of the nickel oxide including a first particle group having a particle diameter of 20 μm or more, and a second particle group having a particle diameter of less than 20 μm; the first particle group including a first component with cracks, and a second component without cracks; a proportion of the first particle group in the particles of the nickel oxide being 15 vol % or more; and a proportion by number of the first component in the first particle group being 15% or more.