NEGATIVE ELECTRODE FOR POWER STORAGE DEVICE AND POWER STORAGE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a negative electrode for a power storage device in which charge/discharge capacity is high and deterioration in battery characteristics due to charge/discharge is small.

SOLUTION: The negative electrode for a power storage device includes a negative electrode active material having a plurality of protrusions and a beam bridging a first protrusion and a second protrusion among the plurality of protrusions, at an upper part. The beam is provided in a direction perpendicular to a direction in which a current collector is bent. An axis of the first protrusion and an axis of the second protrusion are oriented in the same direction. Further, a graphene covering a side surface of each protrusion or covering the side surface of each protrusion and a top surface of the beam may be provided.

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