Positive electrode material, positive electrode for non-aqueous electrolyte secondary battery, and non-aqueous electrolyte secondary battery
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United States of America Patent
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May 22, 2018
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Mar 30, 2016
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Mar 31, 2015
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Abstract
A positive electrode material includes: Li2NiαM1βM2γMnηO4-∈ that has a layered structure including a Li layer and a Ni layer, and in which a Ni—O bond length is shorter than that calculated from the Shannon's ionic radii. α satisfies a relation of 0.50<α≤1.33, β satisfies a relation of 0≤β<0.67, γ satisfies a relation of 0.33≤γ≤1.1, η satisfies a relation of 0≤η≤1.00, ∈ satisfies a relation of 0≤∈≤1.00, M1 represents at least one selected from Co and Ga, M2 represents at least one selected from Ge, Sn and Sb. A positive electrode material may indicate a peak intensity ratio (I003/I104) of 0.9 or more in a measurement of a powder X-ray diffraction indexed with a space group of R3m.
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