IP Library › Granted Patent US 8,906,255
Granted Patent B2
US 8,906,255 · App. 13/846,257 · Granted Dec 9, 2014

Lithium-ion secondary battery

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Quick Facts
Patent No.
US 8,906,255
App. No.
13/846,257
Granted
Dec 9, 2014
Kind
B2
Abstract

The lithium-ion secondary battery in which a positive electrode contains Li a (M) b (PO 4 ) c F d (M=VO or V, 0.9≦a≦3.3, 0.9≦b≦2.2, 0.9≦c≦3.3, 0≦d≦2.0) as an active material and 1 to 300 ppm of sulfur is used.

Claims (9)

1. A lithium-ion secondary battery comprising a positive electrode comprising:

Li a (M) b (PO 4 ) c F d as an active material, where:

M is VO or V,

0.9≦a≦3.3,

0.9≦b≦2.2,

0.9≦c≦3.3, and

0≦d≦2.0, and

1 to 300 ppm of sulfur contained on a surface of the active material.

2. The lithium-ion secondary battery according to claim 1 , wherein the active material contains LiVOPO 4 or Li 3 V 2 (PO 4 ) 3 .

Assignments (2)
CHANGE OF ADDRESS Recorded Jun 12, 2013
From: TDK CORPORATION
To: TDK CORPORATION
Reel/Frame 030651/0687 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 1, 2013
From: SANO, ATSUSHI; OTSUKI, KEITARO
To: TDK CORPORATION
Reel/Frame 030395/0140 →