Battery including ion barrier layer and electronic device including the same

A battery comprising:

• a negative electrode comprising a negative electrode substrate layer and a negative electrode active material-coated negative electrode mixture layer on the negative electrode substrate layer;
• a positive electrode facing the negative electrode, the positive electrode comprising:
• a positive electrode substrate layer;
• a positive electrode active material-coated positive electrode mixture layer provided on the positive electrode substrate layer;
• and
• a barrier layer configured to suppress transfer of ions from the positive electrode active material-coated positive electrode mixture layer;
• and
• a separator provided between the negative electrode and the positive electrode,
• wherein the positive electrode active material-coated positive electrode mixture layer comprises:
• a main area configured to store cations and comprising a transfer area configured to transfer the cations to the negative electrode;
• and
• an additional area extending from the main area and configured to store the cations, and
• wherein the barrier layer covers the additional area and is configured to suppress the cations stored in the additional area from being directly transferred to the negative electrode.

An electronic device comprising:

• a processor;
• and
• a battery configured to supply power to the processor;
• wherein the battery comprises:
• a negative electrode comprising a negative electrode substrate layer and a negative electrode active material-coated negative electrode mixture layer on the negative electrode substrate layer;
• a positive electrode facing the negative electrode, the positive electrode comprising:
• a positive electrode substrate layer;
• a positive electrode active material-coated positive electrode mixture layer provided on the positive electrode substrate layer;
• and
• a barrier layer configured to suppress transfer of ions from the positive electrode active material-coated positive electrode mixture layer;
• and
• a separator provided between the negative electrode and the positive electrode,
• wherein the positive electrode active material-coated positive electrode mixture layer comprises a first area at a center area of the positive electrode active material-coated positive electrode mixture layer and a second area at an edge of the positive electrode active material-coated positive electrode mixture layer, and
• wherein the barrier layer covers at least a portion of the second area and is further configured to limit direct transfer of the ions from the first area to the negative electrode.