Electrode materials for lithium ion batteries

Patent metadata

Field	Value
Publication number	US-10026954-B2
Application number	US-201414770147-A
Country	US
Kind code	B2
Filing date	Jun 30, 2014
Priority date	Jul 8, 2013
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

Electrode materials comprising (a) at least one component of general formula (I) Li(1+x)[NiaCObMncM1d](1−x)O2 (I) the integers being defined as follows: x is in the range of from 0.01 to 0.05, a is in the range of from 0.3 to 0.6, b is in the range of from zero to 0.35, c is in the range of from 0.2 to 0.6, d is in the range of from zero to 0.05, a+b+c+d=1 M1 is at least one metal selected from Ca, Zn, Fe, Ti, Ba, Al, (b) at least one component of general formula (II) LiFe(1−y)M2yPO4.m lithium phosphate (II) y is in the range of from zero to 0.8 M2 is at least one element selected from Co, Mn, Ni, V, Mg, Nd, Zn, and Y, m is selected from 0.01 to 0.15 (c) carbon in electrically conductive modification.

First claim

The invention claimed is:

1. A cathode material comprising:
(a) at least one component of general formula (I)
Li (1+x) [Ni a Co b Mn c M 1 d ] (1−x) O 2   (I),

the integers being defined as follows:
x ranges from 0.01 to 0.07,
a ranges from 0.3 to 0.6,
b ranges from zero to 0.35,
c ranges from 0.2 to 0.6,
d ranges from zero to 0.05,
a+b+c+d=1
M 1 is at least one metal selected from Ca, Zn, Fe, Ti, Ba, Al,

(b) at least one component of general formula (II)
LiFe (1−y) M 2 y PO 4 .m lithium phosphate  (II)

y ranges from zero to 0.8
M 2 is at least one element selected from Co, Mn, Ni, V, Mg, Nd, Zn, and Y,
m is selected from 0.01 to 0.15, and

(c) electrically conductive carbon.

2. The cathode material according to claim 1 , wherein the weight ratio of component (a) to component (b) ranges from 30:70 to 97.5:2.5.

3. The cathode material according to claim 1 , wherein the amount of carbon (c) ranges from 2 to 8% by weight, referring to component (b).

4. The cathode material according to claim 1 , wherein the surface (BET) of component (b) ranges from 5 to 35 m 2 /g.

5. The cathode material according to claim 1 , wherein
a ranges from 0.32 to 0.50,
b ranges from 0.20 to 0.33,
c ranges from 0.30 to 0.40,
d is zero.

6. The cathode material according to claim 1 , wherein lithium phosphate is selected from the group consisting of Li 3 PO 4 , LiPO 3 and Li 4 P 2 O 7 or combinations of at least two thereof.

7. The cathode material according to claim 1 , wherein component (a) is a gradient material.

8. A cathode comprising the cathode material according to claim 1 and at least one binder (d).

9. A battery comprising:
(A) the cathode according to claim 8 ,
(B) at least one anode, and
(C) at least one electrolyte.

10. An automobile comprising the battery according to claim 9 .

Assignees

• Basf Se

Inventors

• Krkljus Ivana
• Volkov Aleksei
• Sueling Carsten

Classifications

• H01M4/5825

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

• H01M4/525

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• H01M4/136

  Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy · CPC title

• H01M4/364 Primary

  as mixtures · CPC title

• H01M4/625

  Carbon or graphite · CPC title