Sodium transition metal polyanion and production method thereof
AssigneesSagami Chemical Research Institute, Tosoh Corporation
InventorsMasaki OKADA, Kennichi TAKAHASHI, Ryoji TANAKA
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Abstract
To provide a sodium transition metal polyanion suitable as a cathode active material of a sodium secondary battery, and a simple method for producing it. A sodium transition metal polyanion, which has a purity of 90 mass % or higher, has a crystallite size of 90 Å or longer and 400 Å or shorter, and is represented by the formula Na3-xMPO4CO3 (M is at least one member selected from the group consisting of Fe, Mn, Ni and Co, and 0≤x≤2).
Claims8
A sodium transition metal polyanion, which has a purity of 90 mass % or higher, has a crystallite size of 90 Å or longer and 400 Å or shorter, and is represented by the formula Na3-xMPO4CO3 (M is at least one member selected from the group consisting of Fe, Mn, Ni and Co, and 0≤x≤2).
Dependencies are inferred from the claim text.