Secondary battery, battery pack, vehicle, and stationary power supply
摘要
說明書
A separator was formed by a method similar to the method described in Example 1 except that LiTFSI was omitted. The thickness of the solid electrolyte layer in this separator was about 20 μm. As a result of TG analysis of the solid electrolyte layer, the ratio of the LATP particles in the solid electrolyte layer was 91.0 mass %, and the ratio of the polyvinyl formal resin was 9.0 mass %. The separator will be referred to as a separator SP3 hereinafter.
A secondary battery was obtained by the method similar to the method described in Example 1 except that the separator SP3 was used in place of the separator SP1.
A separator was formed by a method similar to the method described in Example 1 except that LLZ(Li7La3Zr2O12) particles were used in place of the LATP particles. The average particle size of the LLZ particles was 1.5 μm. The separator will be referred to as a separator SP4 hereinafter.
A secondary battery was obtained by a method similar to the method described in Example 1 except that the separator SP4 was used in place of the separator SP1.
A separator was formed by a method similar to the method described in Example 1 except that the solid content concentration in a solution mixture was changed from 40 mass % to 20 mass %. The thickness of the solid electrolyte layer in this separator was about 19 μm. As a result of TG analysis of the solid electrolyte layer, the ratio of the LATP particles in the solid electrolyte layer was 95.5 mass %, the ratio of the polyvinyl formal resin was 4.1 mass %, and the ratio of the LiTFSI was 0.4 mass %. The separator will be referred to as a separator SP5 hereinafter.
