Graphene oxide, positive electrode for nonaqueous secondary battery using graphene oxide, method of manufacturing positive electrode for nonaqueous secondary battery, nonaqueous secondary battery, and electronic device

Abstract

A graphene oxide used as a raw material of a conductive additive for forming an active material layer with high electron conductivity with a small amount of a conductive additive is provided. A positive electrode for a nonaqueous secondary battery using the graphene oxide as a conductive additive is provided. The graphene oxide is used as a raw material of a conductive additive in a positive electrode for a nonaqueous secondary battery and, in the graphene oxide, the atomic ratio of oxygen to carbon is greater than or equal to 0.405.

1 . (canceled) 
     
     
         2 . A positive electrode active material layer comprising:
 a first portion where first positive electrode active material particles are aggregated;   a second portion where second positive electrode active material particles are aggregated;   a first carbon material sheet capable of a conductive additive; and   a second carbon material sheet capable of a conductive additive,   wherein each of the first carbon material sheet and the second carbon material sheet has a structure in which hexagonal skeletons of carbon are spread in a planar form,   wherein the first carbon material sheet has a region which wraps the first portion and a region which wraps the second portion, and   wherein the first carbon material sheet and the second carbon material sheet are dispersed in the positive electrode active material layer and are in contact with each other.   
     
     
         3 . A positive electrode active material layer comprising:
 a first secondary particle being a positive electrode active material;   a second secondary particle being a negative electrode active material;   a first carbon material sheet capable of a conductive additive; and   a second carbon material sheet capable of a conductive additive,   wherein each of the first carbon material sheet and the second carbon material sheet has a structure in which hexagonal skeletons of carbon are spread in a planar form,   wherein the first carbon material sheet has a region which wraps the first secondary particle and a region which wraps the second secondary particle, and   wherein the first carbon material sheet and the second carbon material sheet are dispersed in the positive electrode active material layer and are in contact with each other.