Lithium manganese compound oxide and non-aqueous electrolyte secondary battery
First Claim
Patent Images
1. A lithium manganese oxide, wherein a content of sulfur is not more than 0.32% by weight, and an averaged diameter of pores is not less than 120 nanometers, and said lithium manganese oxide is represented by Li1+xMn2−
- x−
yMyO4, where “
M”
is at least one of metals and 0.032≦
x≦
0.182;
0≦
y≦
0.2.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention provides a lithium manganese oxide, wherein a content of sulfur is not more than 0.32% by weight, and an averaged diameter of pores is not less than 120 nanometers, and the lithium manganese oxide is represented by Li1+xMn2−x−yMyO4, where “M” is at least one of metals and 0.032≦x≦0.182; 0≦y≦0.2, and also provides a non-aqueous electrolyte secondary battery using the above lithium manganese compound oxide as a positive electrode active material.
19 Citations
38 Claims
-
1. A lithium manganese oxide, wherein a content of sulfur is not more than 0.32% by weight, and an averaged diameter of pores is not less than 120 nanometers, and said lithium manganese oxide is represented by Li1+xMn2−
- x−
yMyO4, where “
M”
is at least one of metals and 0.032≦
x≦
0.182;
0≦
y≦
0.2. - View Dependent Claims (2, 3, 4)
- x−
-
5. A lithium manganese oxide, wherein said lithium manganese oxide is represented by Li1+xMn2−
- x−
yMyO4, where “
M”
is at least one of metals and 0.032≦
x≦
0.182;
0≦
y≦
0.2, and if said lithium manganese oxide is dried in at a temperature of 300°
C. under an atmospheric pressure and subsequently placed a temperature in the range of 20-24°
C. and at a relative humidity in the range of 50-60% and for 48 hours, then a moisture content of said lithium manganese oxide is not more than 0.037% by weight. - View Dependent Claims (6, 7, 8)
- x−
-
9. A positive electrode active material comprising a lithium manganese oxide, wherein a content of sulfur is not more than 0.32% by weight, and an averaged diameter of pores is not less than 120 nanometers, and said lithium manganese oxide is represented by Li1+xMn2−
- x−
yMyO4, where “
M”
is at least one of metals and 0.032≦
x≦
0.182;
0≦
y≦
0.2. - View Dependent Claims (10, 11, 12)
- x−
-
13. A positive electrode active material comprising a lithium manganese oxide, wherein said lithium manganese oxide is represented by Li1+xMn2−
- x−
yMyO4, where “
M”
is at least one of metals and 0.032≦
x≦
0.182, 0≦
y≦
0.2, and if said lithium manganese oxide is dried in at a temperature of 300°
C. under an atmospheric pressure and subsequently placed a temperature in the range of 20-24°
C. and at a relative humidity in the range of 50-60% and for 48 hours, then a moisture content of said lithium manganese oxide is not more than 0.037% by weight. - View Dependent Claims (14, 15, 16)
- x−
-
17. A non-aqueous electrolyte secondary battery having a positive electrode active material comprising a lithium manganese oxide, wherein a content of sulfur is not more than 0.32% by weight, and an averaged diameter of pores is not less than 120 nanometers, and said lithium manganese oxide is represented by Li1+xMn2−
- x−
yMyO4, where “
M”
is at least one of metals and 0.032≦
x≦
0.182;
0≦
y≦
0.2. - View Dependent Claims (18, 19, 20)
- x−
-
21. A non-aqueous electrolyte secondary battery, wherein a positive electrode active material comprises a lithium manganese oxide represented by Li1+xMn2−
- x−
yMyO4, where “
M”
is at least one of metals and 0.032≦
x≦
0.182;
0≦
y≦
0.2, and if said lithium manganese oxide is dried in at a temperature of 300°
C. under an atmospheric pressure and subsequently placed a temperature in the range of 20-24°
C. and at a relative humidity in the range of 50-60% and for 48 hours, then a moisture content of said lithium manganese oxide is not more than 0.037% by weight. - View Dependent Claims (22, 23, 24)
- x−
-
25. A method of forming a lithium manganese oxide, said method comprising the steps of:
-
mixing a manganese source and a lithium source to prepare a mixture; and
subjecting said mixture to a baking in an oxygen-containing atmosphere. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
-
-
37. A method of forming a lithium manganese oxide, said method comprising the steps of:
-
subjecting an electrolytic manganese dioxide to a heat treatment at a temperature in the range of 400-900°
C. in an oxygen-containing atmosphere to transfer said electrolytic manganese dioxide to a manganese oxide comprising one of β
-MnO2 and Mn2O3;
subjecting said manganese dioxide to a water cleaning; and
baking said manganese dioxide together with a lithium compound. - View Dependent Claims (38)
-
Specification