| 摘要 |
PURPOSE: A negative electrode current collector, a negative electrode, and the secondary battery including thereof are provided to reduce the volume resistivity of the current collector while securing cycling ability. CONSTITUTION: A negative electrode current collector(51) contains carbon and sulfur with the content rate less than 100ppm, respectively, and formed with a conductive copper foil in which the average diameter of a crystallite is 0.01~5 micron. The tensile strength of the conductive copper foil is over 400 N per square meters. The crystallite fulfills chemical formula 1 or chemical formula 2, while including 90vol % of the conductive copper foil. |
