Synthetic process for preparation of high surface area electroactive compounds for battery applications
AssigneeEltron Research, Inc.
InventorsCarl Evenson, Richard Mackay
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Abstract
A process is disclosed for the preparation of electroactive cathode compounds useful in lithium-ion batteries, comprising exothermic mixing of low-cost precursors and calcination under appropriate conditions. The exothermic step may be a spontaneous flameless combustion reaction. The disclosed process can be used to prepare any lithium metal phosphate or lithium mixed metal phosphate as a high surface area single phase compound.
Claims35
A process for making a lithium metal phosphate powder comprising:
- a) combining at least one metal precursor, a lithium precursor, a phosphorous precursor, and a chelating carbon source in a solution to form a mixture;
- b) heating the mixture such that flameless combustion occurs to form a porous powder;
- c) calcining the powder to produce the lithium metal phosphate powder.
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A process for making a phosphate composition with a surface area of at least 10 m2/g comprising:
- a) combining at least a glycine and a nitrate to form a mixture and;
- b) heating the mixture such that flameless combustion occurs to form powder;
- c) calcining the powder.
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A lithium metal phosphate material comprising lithium, phosphorus, and a metal selected from the group consisting of Fe, V, Ni, Co, Cr, Cu, Mn, and combinations thereof, wherein the material has a surface area greater than 10 m2/g.
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Dependencies are inferred from the claim text.