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

A secondary battery comprising:

• a negative electrode comprising:
• a negative electrode active material comprising silicon;
• a graphene having conductivity and wrapping a part of a surface of the negative electrode active material;
• and
• a negative electrode current collector,
• wherein the graphene having conductivity comprises multilayer graphenes with a distance of an interlayer greater than or equal to 0.34 nm and less than or equal to 0.5 nm, and
• wherein, when the secondary battery is charged and discharged, a lithium ion is intercalated into or deintercalated from the negative electrode active material using carrier transfer between the interlayer of the graphene having conductivity.

A secondary battery comprising:

• a negative electrode comprising:
• a negative electrode active material comprising silicon;
• a graphene having conductivity and wrapping a part of a surface of the negative electrode active material;
• and
• a negative electrode current collector comprising copper, and
• wherein the graphene having conductivity comprises multilayer graphenes with a distance of an interlayer greater than or equal to 0.34 nm and less than or equal to 0.5 nm, and
• wherein, when the secondary battery is charged and discharged, lithium ion is intercalated into or deintercalated from the negative electrode active material using carrier transfer between the interlayer of the graphene having conductivity.