NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To suppress resistance increase in a high-rate cycle.SOLUTION: A nonaqueous electrolyte secondary battery comprises an electrode body having an opening into/from which an electrolyte can flow. The electrode body includes a positive electrode mixture layer 12. The positive electrode mixture layer 12 has a side face 12s which faces the opening of the electrode body. The positive electrode mixture layer includes: a plurality of composite particles 4; and a filler arranged between the composite particles 4. The composite particles 4 each contain a positive electrode active material, a conductive material, and a binder. The filler is arranged so as to form a passage communicating with the inside of the positive electrode mixture layer from the side face 12s of the positive electrode mixture layer 12.SELECTED DRAWING: Figure 3