ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND BATTERY PACK

摘要

In one embodiment, a negative electrode for a nonaqueous electrolyte secondary battery is a negative electrode which is provided with a metal foil collector, and an negative electrode mixture layer formed on a surface of the metal foil collector, containing a negative electrode active material particle having a carbonaceous material and metal or an oxide of the metal dispersed in the carbonaceous material, a conductive agent, and a binding agent, and the negative electrode mixture layer has an average value of a cutting strength of not less than 0.6 kN/m, and a standard deviation of not less than 0.05 kN/m and not more than 0.2 kN/m, when the negative electrode mixture layer is cut at a portion distant from an interface in a prescribed horizontal direction, by a borazon blade with a blade width of 1 mm, at a rake angle θS of 20 degrees, and a relief angle θN of 10 degrees, and at a horizontal speed of 2 μm/sec.

主权项

1. An electrode for a nonaqueous electrolyte secondary battery comprising:
a collector; and an electrode mixture layer formed on a surface of the collector, comprising an active material having a carbonaceous material and metal or an oxide of the metal dispersed in the carbonaceous material, a conductive agent, and a binding agent; the electrode mixture layer having an average value of a cutting strength of not less than 0.6 kN/m, and a standard deviation of not less than 0.05 kN/m and not more than 0.2 kN/m, when a region at a prescribed depth from a surface of the electrode mixture layer is cut by a borazon blade with a blade width of 1 mm, in a direction in parallel with the surface, at a rake angle θS of 20 degrees, and a relief angle θN of 10 degrees, and at a horizontal speed of 2 μm/sec.