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US 2021/0147299 A1Published application
Ceramics, methods for the production thereof and uses of same
AssigneeHydro-Quebec
InventorsAndrea PAOLELLA, Sylvio SAVOIE, Vincent GARIEPY, Wen ZHU, Abdelbast GUERFI, Karim ZAGHIB
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Abstract
This document describes processes for preparing ceramics, especially lithium-based ceramics. The ceramics produced by this process and their use in electrochemical applications are also described as well as electrode materials, electrodes, electrolyte compositions, and electrochemical cells comprising them.
Claims59
Process for preparing a lithium-based ceramic, the process comprising at least the steps of:
- a) mixing a source of lithium ion, at least one metal oxide or phosphate and a carbon material to obtain a mixture of powders;
- and
- b) heating the mixture of powders obtained in step (a) at a treatment temperature;
- wherein the source of lithium ion used in step (a) has a melting point below the treatment temperature of step (b).
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Process for preparing a ceramic, the process comprising the steps of:
- a) mixing lithium carbonate, a first metal oxide, and a carbon material to obtain a first mixture of powders;
- b) heating the first mixture of powders of step (a) at a temperature of at least 800° C.;
- c) mixing the product of step (b) with second metal oxide and optionally a third metal oxide, to obtain a second mixture of powders;
- d) heating the second mixture of powders obtained in step (c) at a temperature of at least 800° C.;
- wherein the first metal oxide is different from the second metal oxide.
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Process for preparing a ceramic, the process comprising the steps of:
- a) mixing lithium carbonate (Li2CO3), a first metal oxide, and a second metal oxide to obtain a mixture of powders;
- b) heating the mixture of powders obtained in step (a) under a flow of inert gas up to a first temperature below the decomposition temperature of Li2CO3;
- c) stopping the flow of inert gas of step (b) and thermally treating at a second temperature above the first temperature;
- wherein the first metal oxide is different from the second metal oxide.
1 more element
Dependencies are inferred from the claim text.