Processes for the alkaliation or re-alkaliation of an electrode active material
AssigneeHydro-Quebec
InventorsKamyab Amouzegar, François Larouche, Pascal Champagne, Georges Houlachi, Patrick Bouchard, Karim Zaghib
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Abstract
Processes are described for the direct or indirect electrochemical alkaliation of an alkali metal deficient electrochemically active material. The processes include an electrolysis step either during the alkaliation of the alkali metal deficient electrochemically active material on an electrode current collector (direct) or during the regeneration of a reducing agent used for the alkaliation of the electrochemically active material (indirect).
Claims18
A process for the electrochemical alkaliation of an electrochemically active material, the process comprising the steps of:
- (i) adding the electrochemically active material to a solution containing a reducing agent and an alkali metal salt in a solvent to produce an alkaliated electrochemically active material;
- (ii) separating the alkaliated electrochemically active material and the solution;
- and
- (iii) electrochemically treating the solution separated in step (ii) to regenerate the reducing agent in the solution;
- the process optionally further comprising drying the alkaliated electrochemically active material.
Dependencies are inferred from the claim text.