나트륨 이온 이차전지용 정극 활물질

• Main Authors: YAMAUCHI HIDEO, TSUNODA KEI
• Format: Patent
• Language: Korean
• Published: 23.08.2024
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS THEREOF; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

방전 용량이 우수한 신규인 나트륨 이온 이차전전지용 정극 활물질을 제공한다. 일반식 Nax(Ni1-a-bMaM'b)yP2Oz(M 및 M'는 서로 다르고, 각각 Co 및 Mn, Cr, Fe 및 Ti로 이루어지는 군에서 선택된 적어도 1종의 전이 금속 원소이며, 0.6≤x≤4, 0.3≤y≤2.7, 6≤z≤7.5, 0＜a≤0.9, 0＜b≤0.9를 충족함)로 나타내어지는 결정을 함유하는 결정화 유리로 이루어지는 것을 특징으로 하는 나트륨 이온 이차전지용 정극 활물질. Provided is a novel positive-electrode active material for a sodium-ion secondary battery having an excellent discharge capacity. A positive-electrode active material for a sodium-ion secondary battery is made of a crystallized glass containing crystals represented by a general formula Nax(Ni1-a-bMaM'b)yP2Oz (where M and M' are transition metal elements different from each other and each at least one transition metal element selected from the group consisting of Co, Mn, Cr, Fe, and Ti, and 0.6 ≤ x ≤ 4, 0.3 ≤ y ≤ 2.7, 6 ≤ z ≤ 7.5, 0 < a ≤ 0.9, and 0 < b ≤ 0.9 are satisfied).