Olivine-type compounds: method for their preparation and use in cathode materials for sodium-ion batteries

Patent metadata

Field	Value
Publication number	US-11569506-B2
Application number	US-201616064738-A
Country	US
Kind code	B2
Filing date	Dec 20, 2016
Priority date	Dec 21, 2015
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

This disclosure provides for Olivine-type compounds, their preparation and use in cathode materials for sodium-ion batteries. The olivine-type compounds of the invention are obtained by a direct synthesis embodying a hydrothermal method.

First claim

The invention claimed is:

1. A compound
of general formula Na h Li i M′ j M″ k PO 4 , wherein: h is 1, 0<i≤1, 0≤j≤1 and 0≤k≤1, and wherein M′ and M″ are each independently a metal selected from the group consisting of: Mg, Ca, Mn, Fe, Co, Ni and Cu,
and
optionally i is not (1-h); and/or (0<j≤1 and 0<k≤1); or

of general formula NaMn 1−x Mg x PO 4 , wherein: x≈0.1; or
of general formula Na 1−x Mg x PO 4 , wherein: 0<x≤1.

2. A compound according to claim 1 , which is:
of general formula NaLi 1−x M′ x PO 4 , wherein: 0≤x<1; or
of general formula NaLi 1−x−y M′ x M″ y PO 4 , wherein: 0≤x<1 and 0≤y<1 and x+y<1; and

wherein M′ and M″ are each independently a metal selected from the group consisting of: Mg, Ca, Mn, Fe, Co, Ni and Cu.

3. A compound according to claim 1 , which is a sodium phospho-olivine compound.

4. A compound according to claim 1 , which is:
of general formula NaFe 1−x−y Mn x Li y PO 4 , wherein: 0≤x<1 and 0≤y<1 and x+y<1.

5. A cathode material for sodium-ion batteries, comprising:
a compound as defined in claim 1 , optionally with a carbon material.

6. A sodium-ion battery, comprising a cathode material as defined in claim 5 .

7. The compound according to claim 1 , wherein 0<j≤1 and 0<k≤1.

8. A compound of general formula Na 1−x Li x Fe 1−y Mn y PO 4 or Na 1−x Li x Fe y Mn 1−y PO 4 , wherein: 0<x<1 and 0<y<1.

9. A compound according to claim 8 , having the formula Na 0.9 Li 0.1 Fe 0.22 Mn 0.78 PO 4 or Na 0.9 Li 0.1 Fe 0.25 Mn 0.75 PO 4 .

10. A compound
of general formula Na h Li i M′ j M″ k PO 4 , wherein: 0<h≤1, 0<i≤1, 0≤j≤1 and 0≤k≤1, and wherein M′ and M″ are each independently a metal selected from the group consisting of: Mg, Ca, Mn, Fe, Co, Ni and Cu,
wherein i is not (1-h).

11. A compound of general formula NaMn 1−x Mg x PO 4 , wherein: x≈0.1.

12. A compound of general formula Na 1−x Mg x MnPO 4 , wherein: 0<x≤1.

Assignees

• Hydro Quebec
• Cic Energigune

Inventors

• Galceran Mestres Montse
• Casas-Cabanas Montse
• Guerfi Abdelbast
• Armand Michel
• Rojo Teofilo
• Zaghib Karim
• Paolella Andrea

Classifications

• H01M4/587

  for inserting or intercalating light metals · CPC title

• C01P2006/40

  Electric properties · CPC title

• H01M4/5825 Primary

  Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines · CPC title

• H01M4/364

  as mixtures · CPC title

• H01M10/054

  Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium · CPC title