| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrochemical cell excellent in discharge performance, low-temperature performance, cycle life performance, and high-temperature storage performance, and to provide a battery pack and a car using the electrochemical cell, and a manufacturing method of the electrochemical cell.SOLUTION: According to one embodiment, an electrochemical cell includes a positive electrode, a negative electrode, a sulfide-based solid electrolyte layer and an oxide-based solid electrolyte layer. The positive electrode includes positive electrode active material particles which absorb and release lithium ions at potential of 3 V (by lithium potential reference) or more. The sulfide-based solid electrolyte layer is bonded to the negative electrode. The oxide-based solid electrolyte layer covers surfaces of the positive electrode active material particles and has thickness of 0.5 μm or less.SELECTED DRAWING: Figure 1 |
