Battery

Abstract

A battery includes a first electrode layer; and another electrode layer disposed on the first electrode layer and serving as a counter electrode for the first electrode layer. The first electrode layer includes a first current collector, a first active material layer, and a first solid electrolyte layer. The first active material layer is disposed to be in contact with the first current collector and to occupy a smaller area than the first current collector. The first solid electrolyte layer is disposed to be in contact with the first current collector and the first active material layer and to occupy the same area as the first current collector. The first electrode layer includes a peripheral portion including a first rounded portion, and the another electrode layer includes a peripheral portion including another rounded portion.

What is claimed is: 
     
         1 . A battery, comprising:
 a first electrode layer; and   another electrode layer disposed on the first electrode layer and serving as a counter electrode for the first electrode layer,   wherein the first electrode layer includes a first current collector, a first active material layer, and a first solid electrolyte layer,   the another electrode layer includes another active material layer and another solid electrolyte layer,   the first active material layer is disposed to be in contact with the first current collector and to occupy a smaller area than the first current collector,   the another active material layer is disposed to be in contact with the first current collector and to occupy a smaller area than the first current collector,   the first solid electrolyte layer is disposed to be in contact with the first current collector and the first active material layer and to occupy the same area as the first current collector,   the another solid electrolyte layer is disposed to be in contact with the first current collector and the another active material layer, and to occupy the same area as the first current collector,   the first electrode layer includes a peripheral portion including a first rounded portion, and   the another electrode layer includes a peripheral portion including another rounded portion.   
     
     
         2 . The battery according to  claim 1 ,
 wherein the first rounded portion and the another rounded portion have an identical shape, and   the first electrode layer and the another electrode layer are disposed on each other, and an edge portion of the first rounded portion and an edge portion of the another rounded portion are located to coincide with each other.   
     
     
         3 . The battery according to  claim 2 ,
 wherein the first electrode layer and the another electrode layer have an identical shape, and   the first electrode layer and the another electrode layer are disposed on each other, and an edge portion of the first electrode layer and an edge portion of the another electrode layer are located to coincide with each other.   
     
     
         4 . The battery according to  claim 3 ,
 wherein the first electrode layer has a shape including a corner portion,   the corner portion of the first electrode layer includes the first rounded portion,   the another electrode layer has a shape including a corner portion, and   the corner portion of the another electrode layer includes the another rounded portion.   
     
     
         5 . The battery according to  claim 4 ,
 wherein the first electrode layer has a polygon shape including a plurality of corner portions,   the plurality of corner portions of the first electrode layer each include the first rounded portion,   the another electrode layer has a polygon shape including a plurality of corner portions, and   the plurality of corner portions of the another electrode layer each include the another rounded portion.   
     
     
         6 . The battery according to  claim 3 ,
 wherein the first electrode layer and the another electrode layer have a circular shape.   
     
     
         7 . The battery according to  claim 1 , further comprising:
 an additional electrode layer disposed on the first electrode layer and serving as a counter electrode for the first electrode layer,   wherein the first active material layer faces the additional electrode layer with the first solid electrolyte layer therebetween.   
     
     
         8 . A battery comprising:
 a first electrode layer; and   another electrode layer disposed on the first electrode layer and serving as a counter electrode for the first electrode layer,   wherein the first electrode layer includes a first current collector, a first active material layer, and a first solid electrolyte layer,   the another electrode layer includes another current collector, another active material layer, and another solid electrolyte layer,   the first current collector and the another current collector are electrically connected to each other,   the first active material layer is disposed to be in contact with the first current collector and to occupy a smaller area than the first current collector,   the another active material layer is disposed to be in contact with the another current collector and to occupy a smaller area than the another current collector,   the first solid electrolyte layer is disposed to be in contact with the first current collector and the first active material layer and to occupy the same area as the first current collector,   the another solid electrolyte layer is disposed to be in contact with the another current collector and the another active material layer, and to occupy the same area as the another current collector,   the first electrode layer includes a peripheral portion including a first rounded portion, and   the another electrode layer includes a peripheral portion including another rounded portion.   
     
     
         9 . The battery according to  claim 8 ,
 wherein the first rounded portion and the another rounded portion have an identical shape, and   the first electrode layer and the another electrode layer are disposed on each other, and an edge portion of the first rounded portion and an edge portion of the another rounded portion are located to coincide with each other.   
     
     
         10 . The battery according to  claim 9 ,
 wherein the first electrode layer and the another electrode layer have an identical shape, and   the first electrode layer and the another electrode layer are disposed on each other, and an edge portion of the first electrode layer and an edge portion of the another electrode layer are located to coincide with each other.   
     
     
         11 . The battery according to  claim 10 ,
 wherein the first electrode layer has a shape including a corner portion,   the corner portion of the first electrode layer includes the first rounded portion,   the another electrode layer has a shape including a corner portion, and   the corner portion of the another electrode layer includes the another rounded portion.   
     
     
         12 . The battery according to  claim 11 ,
 wherein the first electrode layer has a polygon shape including a plurality of corner portions,   the plurality of corner portions of the first electrode layer each include the first rounded portion,   the another electrode layer has a polygon shape including a plurality of corner portions, and   the plurality of corner portions of the another electrode layer each include the another rounded portion.   
     
     
         13 . The battery according to  claim 10 ,
 wherein the first electrode layer and the another electrode layer have a circular shape.   
     
     
         14 . The battery according to  claim 8 , further comprising:
 an additional electrode layer disposed on the first electrode layer and serving as a counter electrode for the first electrode layer,   wherein the first active material layer faces the additional electrode layer with the first solid electrolyte layer therebetween.