| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a film-forming method capable of preventing cracks of a solid electrolyte layer and a battery utilizing the same. <P>SOLUTION: A positive electrode active material layer 1b is formed on a positive electrode collector 1a. The positive electrode active material layer 1b is heated at a temperature of around 500°C to be annealed. The temperature (base material temperature) of the positive electrode active material layer 1b is retained within a range of >200°C and ≤300°C to form a solid electrolyte layer 3. At this time, vapor-phase growth such as vacuum deposition, sputtering, laser ablation, and ion plating is used. The solid electrolyte layer 3 contains at least one substance selected from phosphorus, silicon, germanium, and gallium, and lithium as well as sulfur. Out of them, an atom percentage of lithium is 20 to 65%. No cracks are generated at the solid electrolyte layer 3 even if it is put through a soldering reflow furnace. <P>COPYRIGHT: (C)2010,JPO&INPIT |
