Electrode active material, its manufacture and use

Patent metadata

Field	Value
Publication number	US-11283074-B2
Application number	US-201816652188-A
Country	US
Kind code	B2
Filing date	Sep 18, 2018
Priority date	Oct 6, 2017
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

Abstract

The present invention is related to an electrode active material for a lithium-ion battery of general formula (I): Li1+x(NiaCobMncMd)1−xO2 wherein x is in the range of from zero to 0.1, a is in the range of from 0.1 to 0.5, b is in the range of from 0.4 to 0.9, c is in the range of from zero to 0.3, d is in the range of from zero to 0.1, M is selected from Al, B, Mg, W, Mo, Ti, Si and Zr, with a+b+c+d=1 and a>c. In addition, the present invention is related to a method of manufacture of electrode active materials and to their use.

First claim

The invention claimed is:

1. An electrode active material of formula (I):
Li 1+x (Ni a Co b Mn c M d ) 1−x O 2   (I)

wherein
x is in the range of from zero to 0.05,
a is in the range of from 0.1 to 0.3,
b is in the range of from 0.5 to 0.8,
c is in the range of from zero to 0.15,
d is in the range of from zero to below 0.05,
M is selected from the group consisting of Al, B, Mg, W, Mo, Ti, Si and Zr,
with a+b+c+d=1 and a>c and 0.01≤c+d≤0.15,
and wherein Co and Ni are homogeneously distributed over the particle diameter of the respective electrode active materials.

2. The electrode active material according to claim 1 , having an average secondary particle diameter (D50) in the range of from 5 to 20 μm.

3. The electrode active material according claim 1 , wherein a volume of the crystallographic unit cell of partially delithiated material according to formula (II)
(Li 1+x ) y (Ni a Co b Mn c M d ) 1−x O 2   (II)

is at most 1 percent smaller than a volume of the crystallographic unit cell of the respective fully lithiated material, with y fulfilling the condition that y·(1+x) is in the range of from 0.35 to 1.

4. An electrode comprising a current collector and
(A) at least one electrode active material according to claim 1 ,
(B) carbon in electrically conductive form,
(C) a binder, and
(D) optionally, a solid electrolyte.

5. The electrode according to claim 4 , comprising:
(A) 50 to 100% by weight of the electrode active material according to claim 1 ;
(B) 0 to 5% by weight of carbon in electrically conductive form;
(C) 0 to 5% by weight of the binder; and,
(D) optionally, a solid electrolyte,
the weight percentages referring to the sum of (A)+(B)+(C)+(D).

6. A process for making an electrode active material according to claim 1 , the process comprising:
(a) manufacturing a particulate precursor by co-precipitation of hydroxides or carbonates of Ni, Co and, optionally, Mn and, optionally, M;
(b) mixing the particulate precursor with a source of lithium to obtain a mixture; and
(C) calcining the mixture obtained in (b).

Assignees

• Basf Se
• Karlsruher Inst Technologie

Inventors

• Hartmann Pascal
• Ryll Thomas Michael
• Erk Christoph
• De Biasi Lea

Classifications

• C01G53/82 Primary

  Compounds containing nickel, with or without oxygen or hydrogen, and containing two or more other elements · CPC title

• C01P2004/62

  Submicrometer sized, i.e. from 0.1-1 micrometer · CPC title

• H01M4/366

  as layered products · CPC title

• C09J133/08

  Homopolymers or copolymers of acrylic acid esters · CPC title

• C01P2006/40

  Electric properties · CPC title