Positive Electrode Active Material for Non-Aqueous Electrolyte Secondary Battery and Non-Aqueous Electrolyte Secondary Battery

Abstract

This positive-electrode active material for a non-aqueous electrolyte secondary battery contains a lithium and transition metal composite oxide represented by the composition formula: LixMnyNizSraMbO2-cFc (where, M is at least two elements selected from Ti, Co, Si, Al, Nb, W, Mo, P, Ca, Mg, Sb, Na, B, V, Cr, Fe, Cu, Zn, Ge, Zr, Ru, K, and Bi, 1.0<x≤1.2, 0.4≤y≤0.8, 0≤z≤0.4, 0<a<0.01, 0<b<0.03, 0<c<0.1, and x+y+z+a+b≤2).

Claims

1. Compositional Li ｘ Mn ｙ Ni ｚ Sr ａ M ｂ O ２－ｃ F ｃ (In the formula, M is two or more elements selected from Ti, Co, and Al, 1.0 < x ≤ 1.2, 0.4 ≤ y ≤ 0.8, 0 ≤ z ≤ 0.4, 0 < a < 0.01, 0 < b < 0.03, 0 < c < 0.1, x + y + z + a + b ≤ 2), and the positive electrode active material for a non-aqueous electrolyte secondary battery containing a lithium transition metal composite oxide represented by the formula.)

2. Compositional formula Li ｘ Mn ｙ Ni ｚ Sr ａ M ｂ O ２－ｃ F ｃ In this case, the molar ratio (b) of M is 0 < b < 0.

02. The positive electrode active material for a non-aqueous electrolyte secondary battery according to claim 1.

3. Constituted Li ｘ Mn ｙ Ni ｚ Sr ａ M ｂ O ２－ｃ F ｃ In this case, the molar ratio (a) of Sr satisfies 0.002 ≤ a ≤ 0.

005. The positive electrode active material for a non-aqueous electrolyte secondary battery according to claim 1 or 2.

4. A non-aqueous electrolyte secondary battery comprising a positive electrode containing a positive electrode active material according to any one of Claims 1 to 3, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte.

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