SULFURIZED SOLID ELECTROLYTE FOR ALL-SOLID-STATE SECONDARY BATTERY, MANUFACTURING METHOD OF SULFURIZED SOLID ELECTROLYTE, AND ALL-SOLID-STATE SECONDARY BATTERY INCLUDING SULFURIZED SOLID ELECTROLYTE

• Main Authors: HAN JUNGMIN, LEE KYULIN, YI JEONG-DOO, LEE JINHEE, SOHN KI SUN, SHIM SUNGGEUN, SOHN DONGRAK, RYU YOUNG-GYOON, SONG MIN SANG, HAN SANG-IL
• Format: Patent
• Language: English; Japanese
• Published: 11.03.2022
• Subjects: BASIC ELECTRIC ELEMENTS; CABLES; CONDUCTORS; ELECTRICITY; INSULATORS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES

To provide a sulfurized solid electrolyte for an all-solid-state secondary battery, a manufacturing method of the sulfurized solid electrolyte, and an all-solid-state secondary battery including the sulfurized solid electrolyte.SOLUTION: In a sulfurized solid electrolyte including lithium, phosphorus, sulfur, and halogen and having an algyrodite-type crystal structure, the ratio (I(29.0)/I(30.0)) of the peak intensity at 2θ29±0.1° to the peak intensity at 2θ30±0.1° obtained by X-ray diffraction analysis for the sulfurized solid electrolyte is 0.06 or less, and the ratio (I(27.1)/I(30.0)) of the peak intensity at 2θ27.1±0.1° to the peak intensity at 2θ30±0.1° obtained by X-ray diffraction analysis for the sulfurized solid electrolyte is 0.06 or less. There are also provided a manufacturing method of the sulfurized solid electrolyte and an all-solid-state secondary battery containing the sulfide-based solid electrolyte.SELECTED DRAWING: Figure 1 【課題】全固体二次電池用硫化物系固体電解質、その製造方法及びそれを含む全固体二次電池を提供する。【解決手段】リチウム、リン、硫黄、及びハロゲンを含み、アルジロダイト型結晶構造を有する硫化物系固体電解質であり、硫化物系固体電解質に対するＸ線回折分析によって求められる、２θ ３０±０．１゜でのピーク強度に対する２θ ２９±０．１゜でのピーク強度の比（Ｉ（２９．０）／Ｉ（３０．０））が０．０６以下であり、前記硫化物系固体電解質に対するＸ線回折分析によって求められる、２θ ３０±０．１゜でのピーク強度に対する２θ ２７．１±０．１゜でのピーク強度の比（Ｉ（２７．１）／Ｉ（３０．０））が０．０６以下である硫化物系固体電解質、その製造方法及び前記硫化物系固体電解質を含む全固体二次電池を提示する。【選択図】図１