| 摘要 |
A lithium-ion secondary cell having a positive electrode, a negative electrode, and an electrolyte; wherein the active material layer in the positive electrode is represented by the general formula LiaMnxNiyCozO2 (where a, x, y, and z are parameters satisfying 1.1 ≤ a ≤ 1.2, 0.45 ≤ x ≤ 0.55, 0.15 ≤ y ≤ 0.35, and 0 ≤ z ≤ 0.15), the active material of the negative electrode is made from graphite and silicon oxide, and the graphite mass/silicon oxide mass value, which is the mass ratio of graphite and silicon oxide, is 1.5 to 9. |
