Cathode material for lithium secondary battery and method for producing lithiated nickel dioxide and lithium secondary battery
First Claim
1. A process for producing lithiated nickel dioxide for use in a cathode of a lithium secondary battery, the lithiated nickel dioxide having an α
- -NaFeO2 structure, the lithiated nickel dioxide having a coulomb efficiency of 80% or higher at the first charging and discharging of the lithiated nickel dioxide in the cathode of a lithium secondary battery, comprising the steps of dispersing a nickel compound in a solvent-containing lithium nitrate solution, the nickel compound being insoluble in the solvent-containing lithium nitrate solution, then evaporating the solvent to obtain a mixture of lithium nitrate and the nickel compound and firing the mixture in an atmosphere containing oxygen.
0 Assignments
0 Petitions
Accused Products
Abstract
The invention provides a cathode material for lithium secondary battery containing lithiated nickel dioxide having excellent charge/discharge characteristics and a process for producing the lithiated nickel dioxide, and a lithium secondary battery. That is, the cathode material for lithium secondary battery contains lithiated nickel dioxide having α-NaFeO2 structure and shows a coulomb efficiency of 80% or higher at the first charging and discharging, and the process for producing lithiated nickel dioxide comprises dispersing a nickel compound in a lithium nitrate solution, then evaporating the solvent to obtain a mixture of lithium nitrate and the nickel compound and firing the mixture in an atmosphere containing oxygen.
14 Citations
15 Claims
-
1. A process for producing lithiated nickel dioxide for use in a cathode of a lithium secondary battery, the lithiated nickel dioxide having an α
- -NaFeO2 structure, the lithiated nickel dioxide having a coulomb efficiency of 80% or higher at the first charging and discharging of the lithiated nickel dioxide in the cathode of a lithium secondary battery, comprising the steps of dispersing a nickel compound in a solvent-containing lithium nitrate solution, the nickel compound being insoluble in the solvent-containing lithium nitrate solution, then evaporating the solvent to obtain a mixture of lithium nitrate and the nickel compound and firing the mixture in an atmosphere containing oxygen.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
14. A process for producing lithiated nickel dioxide, comprising the steps of dispersing a nickel compound in a solvent-containing lithium nitrate solution, the nickel compound being insoluble in the solvent-containing lithium nitrate solution, evaporating the solvent to obtain a mixture of lithium nitrate and the nickel compound, firing the mixture in an atmosphere containing oxygen, and obtaining lithiated nickel dioxide having a α
- -NaFeO2 structure, such that the lithiated nickel dioxide obtained has the property of a first charging and discharging coulomb efficiency of 80% or higher when used as a cathode of a lithium secondary battery.
- View Dependent Claims (15)
Specification