POSITIVE ELECTRODE LAYER FOR ALL-SOLID-STATE SECONDARY BATTERY, ALL-SOLID-STATE SECONDARY BATTERY INCLUDING POSITIVE ELECTRODE LAYER, AND MANUFACTURING METHOD OF POSITIVE ELECTRODE LAYER

To provide a positive electrode layer for an all-solid-state secondary battery, an all-solid-state secondary battery including the positive electrode layer, and a manufacturing method of the positive electrode layer.SOLUTION: In a positive electrode layer for an all-solid-state secondary battery including a sulfide-based solid electrolyte, the positive electrode layer includes a positive electrode current collector and a positive electrode active material layer arranged on the positive electrode current collector, the positive electrode active material layer includes a positive electrode active material, a binder, a sulfide-based solid electrolyte, and a dispersion medium, and the dispersion medium includes a compound represented by a formula (1), and a compound represented by a formula (2), and there are also provided an all-solid-state secondary battery including the positive electrode layer, and a manufacturing method of the positive electrode layer. In R1-C(=O)O-R2 (1), R1 is the alkyl group of C1-C2, and R2 is the alkyl group of C7-C9, and in R2-OH (2), R2 is an alkyl group of C7-C9.SELECTED DRAWING: Figure 1 【課題】全固体二次電池用正極層、それを含む全固体二次電池及びその製造方法を提供する。【解決手段】硫化物系固体電解質を含む全固体二次電池用正極層であり、正極層が正極集電体及び正極集電体上に配置された正極活物質層を含み、正極活物質層が正極活物質、バインダ、硫化物系固体電解質及び分散媒を含み、分散媒が化学式１で表示される化合物及び化学式２で表示される化合物を含む全固体二次電池用正極層、それを含む全固体二次電池及びその製造方法である。［化１］Ｒ１－Ｃ（＝Ｏ）Ｏ－Ｒ２化学式１で、Ｒ１は、Ｃ１－Ｃ２のアルキル基であり、Ｒ２は、Ｃ７－Ｃ９のアルキル基であり、［化２］Ｒ２－ＯＨ化学式２で、Ｒ２は、Ｃ７－Ｃ９のアルキル基である。【選択図】図１