ACTIVE MATERIAL, AND POSITIVE ELECTRODE MIXTURE AND SOLID-STATE BATTERY THAT USE SAID ACTIVE MATERIAL

• Main Authors: IDE HITOHIKO, MITSUMOTO TETSUYA, WASHIDA DAISUKE, KOMODA YASUO, MAEDA TOMOYUKI, SHIBATA YASUHIRO, TABIRA YASUNORI, OMURA JUN
• Format: Patent
• Language: Chinese; English
• Published: 11.12.2020
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The purpose of the present invention is to provide an active material with which it is possible to improve battery performance by reducing resistance at an interface with a sulfide solid electrolyte.In a radius vector distribution function obtained through measurement of an X-ray absorption fine structure, this active material shows at least one peak in a range of 0.145-0.185 nm, and at least onepeak in a range of 0.28-0.31 nm. The active material is intended for use in a solid-state battery. It is preferable for the active material to have core material particles and a covering layer disposed on the surface of said core material particles. 本发明的目的是提供一种能够减小与硫化物固体电解质的界面电阻、实现电池性能提高的活性物质。所述活性物质在通过X射线吸收精细结构的测定而得到的径向分布函数中在0.145nm～0.185nm的范围内观察到至少1个峰，与此同时在0.28nm～0.31nm的范围内观察到至少1个峰。该活性物质被用于全固体电池中。该活性物质优选具有芯材粒子和配置在该芯材粒子的表面上的覆盖层。