Metal-containing compounds
AssigneeFaradion Limited
InventorsJeremy Barker, Richard Heap
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Abstract
The invention relates to a novel solid state process for the preparation of metal-containing compounds comprising the steps i) forming a reaction mixture comprising one or more metal-containing precursor compounds and optionally one or more non-metal-containing reactants, and ii) using one or more hypophosphite-containing materials as a reducing agent; wherein one or more of the hypophosphite-containing materials is used as an agent to reduce one or more of the metal-containing precursor compounds; and further wherein the process is performed in the absence of an oxidizing atmosphere. Materials made by such a process are useful, for example, as electrode materials in alkali metal-ion battery applications.
Claims13
A solid state process for preparing a metal-containing compound comprising the formula:
- AaMb(XcYd)eZf
- wherein:
- A is an alkali metal selected from one or more of sodium and potassium;
- M comprises one or more metals selected from the group consisting of titanium, vanadium, niobium, tantalum, hafnium, chromium, molybdenum, tungsten, manganese, iron, osmium, cobalt, nickel, palladium, platinum, copper, silver, gold, zinc, cadmium, aluminium, scandium, yttrium, zirconium, technetium, rhenium, ruthenium, rhodium, iridium, mercury, gallium, indium, tin, lead, bismuth, magnesium, calcium, beryllium, strontium barium, boron, silicon, germanium, arsenic, antimony and tellurium;
- (XcYd) is at least one first anion and is a moiety selected from one or more of PO4 and/or P2O7;
- and
- Z is at least one second anion
- wherein a>0;
- b>0;
- c>0;
- d>0;
- e>0 and f≥0;
- wherein a, b, c, d, e and f are chosen to maintain electroneutrality;
- comprising the steps:
- a) forming a mixture of starting materials in their solid form, comprising i) one or more M metal-containing precursor compounds, ii) one or more A metal-containing and hypophosphite-containing materials;
- b) heating the mixture of starting materials from 150° C. to 1200° C. in the absence of an oxidizing atmosphere to form the metal-containing compound;
- and
- c) recovering the metal-containing compound.
Dependencies are inferred from the claim text.