Doped spinel, method for the production thereof, the use thereof and lithium-ion battery

Patent metadata

Field	Value
Publication number	US-9825284-B2
Application number	US-201314389767-A
Country	US
Kind code	B2
Filing date	Mar 28, 2013
Priority date	Apr 2, 2012
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

A doped spinel comprising the formula:

Li 1±w Me1 v Me2 x-v Mn 2-x-y TiyO 4-z F z

where, 0≦w<1, 0.3<x≦0.7, 0.3≦v<0.7, x>v, 0.0001≦y≦0.35, and 0.0001≦z≦0.3. Me1 is a metal selected from a group of elements consisting of Cr, Fe, Co, Ni, Cu, and Zn. Me2 is a metal selected from a group of elements consisting of Ni, Fe, Co, Mg, Cr, V, Ru, Mg, Al, Zn, Cu, Cd, Ag, Y, Sc, Ga, In, As, Sb, Pt, Au, and B.

First claim

What is claimed is:

1. A doped spinel comprising the formula
Li 1±w Me1 v Me2 x-v Mn 2-x-y TiyO 4-z F z
where,
0≦w<1,
0.3<x≦0.7,
0.3≦v<0.7,
x>v,
0.0001≦y≦0.35,
0.0001≦z≦0.3,
Me1 is a metal selected from a group of elements consisting of Cr, Fe, Co, Ni, Cu, and Zn, and
Me2 is a metal selected from a group of elements consisting of Ni, Fe, Co, Mg, Cr, V, Ru, Mg, Al, Zn, Cu, Cd, Ag, Y, Sc, Ga, In, As, Sb, Pt, Au, and B,
wherein, a specific capacity of the doped spinel from 1 to 50 cycles did not decrease in a voltage range of from 2.0 to 5.0 V, and
the doped spinel is prepared by a process consisting of:
providing a solution of a metal-organic and/or inorganic Li, Mn, Me, Me1 and/or Me2 compound(s) as a precursor;
spray drying the precursor with trifluoroacetic acid so as to obtain a sprayed precursor;
calcining the sprayed precursor so as to provide the doped spinel in a form of a pulverulent material;
milling the pulverulent material in ethanol so as to provide a suspension;
adding a lithium compound and a titanium alkoxide in an ethanolic solution to the suspension so as to provide a resulting material;
spray granulating the resulting material so as to obtain a spray-granulated material; and

thermally converting the spray-granulated material so as to obtain a Ti-doped oxyfluoride spinel.

Assignees

• Karlsruher Inst Technologie

Inventors

• Binder Joachim
• Glatthaar Sven
• Schroeder Melanie

Classifications

• H01M4/54

  of silver · CPC title

• H01M4/505

  of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title

• C01P2006/12

  Surface area · CPC title

• C01P2002/52

  containing elements as dopants · CPC title

• H01M4/485

  of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title