| abstract |
A negative electrode active material layer on the negative electrode current collector 3 in order to provide a negative electrode for a lithium secondary battery having a high electrode density, that is, a high volume energy density and improved life characteristics, and a lithium secondary battery using the same. (2a, 2b) includes at least the first particle 4, the second particle 5, and the binder 6, and the first particle 4 is made of SiO χ (0 <χ <2.0), and the second particle 5 is The Si alloy includes Si, at least one element selected from metal elements other than Li, Mn, Fe, Co, and Ni, and metalloid elements, and the central particles of the first particles 4. A negative electrode for a lithium secondary battery having a diameter D50 larger than the center particle diameter D50 of the second particles 5 is used. |