SOLID ELECTROLYTE, AND ALL-SOLID-STATE ION SECONDARY BATTERY

• Main Authors: TAKIZAWA HIROTANE, ASARI YUSUKE, ONODERA HIROTSUYO, NAKATANI TOMOYA, FUJIEDA TADASHI, KAWAJI JUN, HAYASHI YAMATO
• Format: Patent
• Language: English; Japanese
• Published: 23.03.2015
• Subjects: BASIC ELECTRIC ELEMENTS; CABLES; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; CONDUCTORS; ELECTRICITY; INORGANIC CHEMISTRY; INSULATORS; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES

PROBLEM TO BE SOLVED: To provide a solid electrolyte for an all-solid-state ion secondary battery, in which resistance to reduction is compatible with ion conductivity.SOLUTION: This all-solid-state ion secondary battery includes a positive electrode active material layer which contains a solid electrolyte having a ramsdellite type crystal structure expressed by LiSnO(0<x<1.33), particles containing the solid electrolyte, a positive electrode material, and an oxide softened and fluidized at lower temperatures in comparison with the solid electrolyte while having ion conductivity, and in which the particles and the positive electrode active material are bound by the oxide, a negative electrode active material layer which contains particles containing the solid electrolyte, a negative electrode active material, and an oxide softened and fluidized at lower temperatures in comparison with the solid electrolyte, and in which the particles and the negative electrode active material are bound by the oxide, and a solid electrolyte layer containing the solid electrolyte. The solid electrolyte layer is bonded between the positive electrode active material layer and the negative electrode layer. 【課題】耐環元性と高イオン伝導性とを両立する全固体型イオン二次電池の固体電解質の提供。【解決手段】Ｌｉ４ｘＳｎ４−ｘＯ８（０＜ｘ＜１．３３）で表わされるラムスデライト型の結晶構造を有する固体電解質、及び前記固体電解質を含む粒子と、正極活物質と、該固体電解質よりも低温で軟化流動するイオン伝導性を有する酸化物とを含み、前記粒子及び前記正極活物質が前記酸化物で結着されている正極活物質層、及び前記固体電解質を含む粒子と、負極活物質と、該固体電解質よりも低温で軟化流動するイオン伝導性を有する酸化物とを含み、前記粒子及び前記負極活物質が前記酸化物で結着されていることを特徴とする負極活物質層、及び前記固体電解質を含む固体電解質層と、正極活物質層と、負極活物質層とを備え、前記固体電解質層は、前記正極活物質層と前記負極活物質層との間に接合された構成を有する全固体型イオン二次電池。【選択図】図１