Synthesis of a metastable vanadium pentoxide as a cathode material for ion batteries

Patent metadata

Field	Value
Publication number	US-2024282947-A1
Application number	US-202418406264-A
Country	US
Kind code	A1
Filing date	Jan 8, 2024
Priority date	Dec 21, 2017
Publication date	Aug 22, 2024
Grant date	—

Abstract

A highly scalable process has been developed for stabilizing large quantities of the zeta-polymorph of V 2 O 5 , a metastable kinetically trapped phase, with high compositional and phase purity. The process utilizes a beta-Cux V 2 O 5 precursor which is synthetized from solution using all-soluble precursors. The copper can be leached from this structure by a room temperature post-synthetic route to stabilize an empty tunnel framework entirely devoid of intercalating cations. The metastable ζ-V 2 O 5 thus stabilized can be used as a monovalent-(Li, Na) or multivalent-(Mg, Ca, Al) ion battery cathode material.

First claim

1 . ζ-V 2 O 5 nanowires comprising β-Cu x V 2 O 5 , wherein:
a) x is 0.33<x<0.66 nanowires;
b) x is 0.006<x<0.66; or
c) x is 0.006<x<0.33.

2 . The ζ-V 2 O 5 nanowires of claim 1 , wherein x is 0.33<x<0.66.

3 . The ζ-V 2 O 5 nanowires of claim 1 , wherein x is 0.006<x<0.66.

4 . The ζ-V 2 O 5 nanowires of claim 1 , wherein x is 0.006<x<0.33.

5 . The ζ-V 2 O 5 nanowires of claim 1 , said nanowires being intercalated with one or more ions selected from the group consisting of Li + ions, Na + ions, Al 3+ ions, Y 3+ ions, Ca 2+ ions, Mg 2+ ions, Zn 2+ ions, and combinations thereof.

6 . A battery comprising a cathode comprising ζ-V 2 O 5 nanowires according to claim 1 , an anode, an electrolyte solution or suspension comprising metal ions.

7 . The battery of claim 6 , wherein the electrolyte solution or suspension comprises an organic solvent and a Mg-containing solute.

8 . The battery of claim 7 , wherein the Mg-containing solute includes an alkyl-Mg solute.

Assignees

• Texas A & M Univ Sys

Inventors

• Banerjee Sarbajit
• Andrews Justin L

Classifications

• H01M2004/028

  Positive electrodes · CPC title

• H01M10/054

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

• H01M4/625

  Carbon or graphite · CPC title

• H01M4/622

  being polymers · CPC title

• H01M4/483

  for non-aqueous cells (H01M4/485 takes precedence) · CPC title