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US 9,748,616 B2Granted
Regeneration of cathode material of lithium-ion batteries
AssigneeUniversity of Calcutta
InventorNilanjan Deb
Life of this patent
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Abstract
Lithium metal oxides may be regenerated under ambient conditions from materials recovered from partially or fully depleted lithium-ion batteries. Recovered lithium and metal materials may be reduced to nanoparticles and recombined to produce regenerated lithium metal oxides. The regenerated lithium metal oxides may be used to produce rechargeable lithium ion batteries.
Claims20
A method for regenerating a cathode material from a partially or fully depleted lithium-ion battery, the method comprising:
- recovering lithium metal oxide from the lithium-ion battery;
- converting at least a portion of the lithium metal oxide to lithium halide and a metal oxide;
- reducing the lithium halide and the metal oxide to respective lithium nanoparticles and metal nanoparticles;
- and
- combining the lithium nanoparticles with the metal nanoparticles in the presence of oxygen to produce regenerated lithium metal oxide.
2 more elements
A method for regenerating and reusing cathode material from a partially or fully depleted lithium-ion battery, the method comprising:
- recovering lithium metal oxide from the battery;
- converting at least a portion of the lithium metal oxide to lithium halide and a metal oxide;
- reducing the lithium halide and the metal oxide to respective lithium nanoparticles and metal nanoparticles;
- combining the lithium nanoparticles with the metal nanoparticles in the presence of oxygen to produce regenerated lithium metal oxide;
- coating a metal foil with the regenerated lithium metal oxide;
- layering the coated metal foil, separator sheets, and an anode sheet to produce a stacked electrode structure;
- and
- contacting the stacked electrode structure with an electrolyte solution to produce the lithium-ion battery.
5 more elements
Dependencies are inferred from the claim text.