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US 12,583,759 B2Granted
Alkali metal-doped and alkaline earth metal-doped positive electrode materials and methods of manufacturing the same
AssigneeGM Global Technology Operations LLC
InventorsGongshin Qi, Devendrasinh Darbar, Raneen Taha, Wei Li
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Abstract
A positive electrode material including a layered lithium- and manganese-rich nickel oxide (LMR) doped with an alkali metal and/or an alkaline earth metal. The positive electrode material may be manufactured by preparing a mixture comprising a transition metal carbonate, a dopant metal carbonate, and a lithium source, and then calcining the mixture to form the alkali metal and/or alkaline earth metal-doped LMR.
Claims20
A method of manufacturing a positive electrode material, the method comprising:
- preparing a mixture comprising a transition metal carbonate, a dopant metal carbonate, and a lithium source, the transition metal carbonate comprising nickel and manganese, and the dopant metal carbonate comprising a dopant metal selected from the group consisting of sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and combinations thereof;
- and
- calcining the mixture to form an oxide represented by the formula (1):
- Li1.2-xAx[Mn0.8-x-y-zNiyMez]O2, (1)
- where A is the dopant metal, Me is a metal selected from the group consisting of cobalt (Co), aluminum (Al), and combinations thereof, 0<x≤0.12, 0.1≤y≤0.5, and 0≤ z≤0.2.
2 more elements
A method of manufacturing a positive electrode material, the method comprising:
- preparing a precursor solution comprising a metal salt in a solvent, the metal salt comprising nickel, manganese, and a dopant metal comprising rubidium (Rb), cesium (Cs), or a combination thereof;
- introducing an ammonium carbonate solution into the precursor solution to form a slurry including a solid precipitate phase comprising a transition metal carbonate comprising nickel and manganese and a dopant metal carbonate comprising the dopant metal;
- preparing a mixture comprising the transition metal carbonate, the dopant metal carbonate, and a lithium source;
- and
- calcining the mixture in an oxygen-containing environment at a temperature of 700 degrees Celsius to 1000 degrees Celsius to form an oxide represented by the formula Li1.2-xAx[Mn0.8-x-yNiy]O2, where A is the dopant metal, 0.005<x≤0.05 and 0.2≤y≤0.3.
2 more elements
Dependencies are inferred from the claim text.