Positive electrode active material for nonaqueous electrolyte secondary battery

Patent metadata

Field	Value
Publication number	US-2016285092-A1
Application number	US-201615075937-A
Country	US
Kind code	A1
Filing date	Mar 21, 2016
Priority date	Mar 24, 2015
Publication date	Sep 29, 2016
Grant date	—

Abstract

The present disclosure provides a positive electrode active material for nonaqueous electrolyte secondary batteries including: a lithium transition metal composite oxide represented by general formula: Li a (Ni 1-x Cr x ) a (Mn 1-y Ti y ) 2-α-β-γ-δ Mg β Al γ M δ O 4 in which 1.00≦a≦1.30, 0.020≦x≦0.200, 0.006≦y≦0.070, 0.450≦α≦0.550, 0≦β≦0.015, 0≦γ≦0.035, and 0≦δ≦0.010, and M represents at least one element selected from the group consisting of Na, K, Ca, Sr, Ba, Ga, Co, Zn, Si, Ge, Zr, Hf, Sn, Ta, Nb, P, Bi, Mo, and W.

First claim

What is claimed is:

1 . A positive electrode active material for a nonaqueous electrolyte secondary battery comprising:
a lithium transition metal composite oxide represented by general formula:
Li a (Ni 1-x Cr x ) α (Mn 1-y Ti y ) 2-α-β-γ-δ Mg β Al γ M δ O 4
wherein 1.00≦a≦1.30, 0.020≦x≦0.200, 0.006≦y≦0.070, 0.450≦α≦50.550, 0≦β≦0.015, 0≦γ≦0.035, and 0≦δ≦0.010; and M represents at least one element selected from the group consisting of Na, K, Ca, Sr, Ba, Ga, Co, Zn, Si, Ge, Zr, Hf, Sn, Ta, Nb, P, Bi, Mo, and W.

2 . The positive electrode active material according to claim 1 , wherein, in the general formula, x, y, α, β, γ, and δ satisfy 0.85(x·α)/{y·(2−α−β−γ−δ)}≦1.15.

3 . The positive electrode active material according to claim 1 , wherein, in the general formula, γ satisfies γ=0.

4 . The positive electrode active material according to claim 2 , wherein, in the general formula, γ satisfies γ=0.

5 . The positive electrode active material according to claim 1 , wherein, in the general formula, γ satisfies γ=0.

6 . The positive electrode active material according to claim 2 , wherein, in the general formula, γ satisfies γ=0.

7 . The positive electrode active material according to claim 3 , wherein, in the general formula, γ satisfies γ=0.

8 . The positive electrode active material according to claim 4 , wherein, in the general formula, γ satisfies γ=0.

9 . The positive electrode active material according to claim 1 , wherein, in the general formula, M is Zr.

10 . The positive electrode active material according to claim 2 , wherein, in the general formula, M is Zr.

11 . The positive electrode active material according to claim 3 , wherein, in the general formula, M is Zr.

12 . The positive electrode active material according to claim 4 , wherein, in the general formula, M is Zr.

13 . The positive electrode active material according to claim 5 , wherein, in the general formula, M is Zr.

14 . The positive electrode active material according to claim 6 , wherein, in the general formula, M is Zr.

15 . The positive electrode active material according to claim 7 , wherein, in the general formula, M is Zr.

16 . The positive electrode active material according to claim 8 , wherein, in the general formula, M is Zr.

Assignees

• Nichia Corp

Inventors

• Kawasaki Tomooki
• Kobayashi Kenichi

Classifications

• H01M10/052

  Li-accumulators · CPC title

• H01M2004/028

  Positive electrodes · CPC title

• H01M4/525

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• H01M4/505 Primary

  of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title

• H01B1/08

  oxides · CPC title