Positive electrode material for lithium-ion battery

Patent metadata

Field	Value
Publication number	US-9722244-B2
Application number	US-201314427495-A
Country	US
Kind code	B2
Filing date	Sep 11, 2013
Priority date	Sep 13, 2012
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

A compound of formula Li 4+x MnM 1 a M 2 b O c wherein:
M 1 is selected from the group consisting in Ni, Mn, Co, Fe and a mixture thereof; M 2 is selected from the group consisting in Si, Ti, Mo, B, Al and a mixture thereof;

with:
−1.2≦x≦3; 0<a≦2.5; 0≦b≦1.5; 4.3≦c≦10; and c=4+a+n·b+x/2

wherein
n=2 when M 2 is selected from the group consisting in Si, Ti, Mo or a mixture thereof; and n=1.5 when M 2 is selected from the group consisting in B, Al or a mixture thereof; and n=0 if b=0.

First claim

The invention claimed is:

1. A compound of formula Li 4+x MnM 1 a M 2 b O c
wherein:
M 1 is selected from the group consisting in Ni, Mn, Co, Fe and a mixture thereof;
M 2 is selected from the group consisting in Si, Ti, Mo, B, Al and a mixture thereof;

with:
−1.2≦x≦3;
0<a≦2.5;
0<b≦1.5;
4.3≦c≦10; and
c=4+a+(n·b)+x/2

wherein:
n=2 when M 2 is selected from the group consisting in Si, Ti, Mo or a mixture thereof; and
n=1.5 when M 2 is selected from the group consisting in B, Al or a mixture thereof.

2. The compound according to claim 1 , wherein 0<x≦2.

3. The compound according to claim 1 , wherein 0.5≦a≦1.

4. The compound according to claim 1 , wherein 0<b≦0.5.

5. The compound according to claim 1 , wherein 5≦c≦7.

6. The compound according to claim 1 not containing any molybdenum.

7. A composite material comprising the compound according to claim 1 and carbon in a mass percentage of less than 20% by weight based on the weight of the composite material.

8. A battery of the lithium-ion type comprising a positive electrode comprising the composite material according to claim 7 .

9. A battery of the lithium-ion type comprising a positive electrode comprising the compound according to claim 1 .

Assignees

• Accumulateurs Fixes
• Umicore Nv

Inventors

• Jordy Christian
• Caillon Georges
• Hezeque Thierry
• Levasseur Stephane
• Kosova Nina V
• Devyatkina Evgeniya T

Classifications

• H01B1/08

  oxides · CPC title

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• C01G45/1285

  of the type (Mn2O5)n- · CPC title

• C01G51/62

  of the type (Mn2O5)n- · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title