| abstract |
(57) [Problem] To provide a lithium secondary battery in which a charging time is shortened. SOLUTION: In a lithium secondary battery having a positive electrode, a negative electrode and an electrolyte, wherein the negative electrode is formed by laminating a negative electrode material layer containing a negative electrode active material on a current collector, the negative electrode material layer is arranged in a thickness direction. The anode material layer A1 on the current collector side is divided into half, When the negative electrode material layer A2 on the side opposite to the current collector side is used, A The average porosity of 1 is made larger than the average porosity of A2. |