Positive electrode active material for sodium ion secondary battery
AssigneeNippon Electric Glass Co., Ltd.
InventorHideo Yamauchi
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Abstract
Provided is a Ni-based 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, the positive electrode active material being composed of crystals represented by a general formula Nax (Ni1−aMa) yP2Oz (where M represents at least one transition metal element selected from the group consisting of Fe, Cr, Mn, and Co and the following are satisfied: 0.6≤x≤4, 0.3≤y≤2.7, 0≤a≤0.9, and 6≤z<7.5).
Claims8
A positive electrode active material for a sodium ion secondary battery, the positive electrode active material being composed of crystals represented by a general formula Nax(Ni1−aMa)yP2Oz where M represents at least one transition metal element selected from the group consisting of Cr, Mn, and Co and the following are satisfied:
- 0.6≤x≤4, 0.3≤y≤1.3, 0≤a≤0.9, and 6≤z<7.5).
Dependencies are inferred from the claim text.