NONAQUEOUS ELECTROLYTE SOLUTION SECONDARY BATTERY

原文（中国語）

A negative electrode of a nonaqueous electrolyte solution secondary battery disclosed herein includes a negative electrode active material layer and a plurality of negative electrode tabs. When a root part of the negative electrode active material layer where the negative electrode tab extends is measured with a spectrometer, an a* value in an L*a*b* color system is 1.3 or less. A value obtained by measuring the amount of carbon element and the amount of boron element by laser ablation ICP mass spectrometry along a width direction of the negative electrode active material layer and integrating a ratio (B/C) of the amount of boron element to the amount of carbon element in the range of ±20 mm from a center in the width direction is 28 or more.