CATHODE ACTIVE MATERIAL FOR LITHIUM-ION SECONDARY BATTERIES, AND LITHIUM-ION SECONDARY BATTERY

• Main Authors: AIDA TAIRA, YABUUCHI NAOAKI
• Format: Patent
• Language: English; Japanese
• Published: 26.03.2024
• 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

To provide a cathode active material for lithium-ion secondary batteries having excellent battery capacity when applied to lithium-ion secondary batteries, while reducing the nickel content.SOLUTION: A cathode active material for lithium-ion secondary batteries is represented by a general formula: LixNiaMbO2-y, where the element M is transition metal, x satisfies 0.95≤x≤1.30, y satisfies 0<y<2, and a and b satisfy a+b=1.0.SELECTED DRAWING: None 【課題】ニッケルの含有割合を抑制しつつ、リチウムイオン二次電池に適用した場合に電池容量に優れたリチウムイオン二次電池用正極活物質を提供する。【解決手段】一般式：ＬｉｘＮｉａＭｂＯ２－ｙで表され、元素Ｍが遷移金属であり、ｘが０．９５≦ｘ≦１．３０ｙが０＜ｙ＜２ａ＋ｂ＝１．０であるリチウムイオン二次電池用正極活物質。【選択図】なし