Method for forming metal fluoride material
AssigneeQuantumScape Corporation
InventorJon Shan
Life of this patent
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Abstract
The present invention is directed to processing techniques and systems of metal fluoride based material, including but not limited to nickel difluoride, copper difluoride, manganese fluoride, chromium fluoride, bismuth fluoride, iron trifluoride, iron difluoride, iron oxyfluoride, metal doped iron fluorides, e.g., FexM1-xFy (M=metals, which can be Co, Ni, Cu, Cr, Mn, Bi and Ti) materials. An exemplary implementation involves mixing a first compound comprising a metal material, nitrogen, and oxygen to a second compound comprising hydrogen fluoride. The mixed compound is milled to form metal fluoride precursor and a certain byproduct. The byproduct is removed, and the metal fluoride precursor is treated to form iron trifluoride product. There are other embodiments as well.
Claims28
A method for processing a metal fluoride based material comprising:
- providing a first compound comprising metal, nitrogen, and oxygen elements at a first quantity;
- A second compound comprising ammonium hydrogen fluoride at a second quantity;
- mixing the first compound and the second compound in a first container;
- providing a milling agent within the first container;
- causing movements of the containers at a first frequency for a first duration to form a milled compound;
- removing the first container from the milling apparatus;
- processing the milled compound to obtain a segregated compound;
- removing a supernatant portion from the separated compound from the second container to obtain a mixed compound, the mixed compound comprising a portion of metal fluoride material, a portion of nitrate material, and a portion of ammonium material;
- removing substantially remove an entirety of the portion of nitrate material and the portion of ammonium material by repeatedly adding a solvent to the mixed compound and removing the portion of nitrate material and the portion of the ammonium material dissolved in the solvent;
- drying the portion of the metal fluoride material at a temperature of between least 20 to 200 degrees Celsius to form metal fluoride powders;
- subjecting the metal fluoride powders to the temperature of at least 350 degrees Celsius for a third duration of at least 2 hours in a substantially oxygen-free environment;
- and
- cooling the metal fluoride powders.
A method for processing an iron fluoride material comprising:
- providing a first compound comprising molecules having metal material at an oxidation state of +3 or +2 and a ligand material, the first compound being characterized by a first quantity;
- providing a second compound comprising ammonium hydrogen fluoride at a second quantity;
- mixing the first compound and the second compound with a solution at a third quantity, the third quantity being less than three times the weight of the first quantity;
- providing a milling agent;
- milling the first and second compounds to perform a reaction to form products and by byproducts, the products comprise a portion of metal fluoride material, the byproducts comprising a portion of nitrate material and a portion of ammonium material;
- separating the products and the byproducts;
- removing the byproducts;
- and
- drying the products at a temperature of between least 20 to 200 degrees Celsius to form metal fluoride powder material.
Dependencies are inferred from the claim text.