IP Library › Granted Patent US 8,936,871
Granted Patent B2
US 8,936,871 · App. 12/568,075 · Granted Jan 20, 2015

Active material and positive electrode and lithium-ion second battery using same

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Quick Facts
Patent No.
US 8,936,871
App. No.
12/568,075
Granted
Jan 20, 2015
Kind
B2
Abstract

An active material contains a triclinic LiVOPO 4 crystal particle, while the crystal particle has a spherical form and an average particle size of 20 to 200 nm.

Claims (7)

1. An active material containing a triclinic LiVOPO 4 crystal particle, the crystal particle having:

a spherical form;

a longer to shorter diameter ratio (longer diameter/shorter diameter) of 1 to 2;

an average particle size of 20 to 92 nm; and

a BET specific surface area of 2 to 50 m 2 /g.

2. A positive electrode containing the active material according to claim 1 .

3. A lithium-ion secondary battery including the positive electrode according to claim 2 .

Assignments (4)
CHANGE OF ADDRESS Recorded Jun 12, 2013
From: TDK CORPORATION
To: TDK CORPORATION
Reel/Frame 030651/0687 →
CORRECTIVE ASSIGNMENT TO CORRECT INVENTOR'S NAME Recorded Sep 17, 2010
From: MIYAKI, YOSUKE
To: TDK CORPORATION
Reel/Frame 025010/0115 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 18, 2009
From: SANO, ATSUSHI; OTSUKI, KEITARO; MIYAKI, YOUSUKE; TAKAHASHI, TAKESHI; HIGUCHI, AKIJI
To: TDK CORPORATION
Reel/Frame 023559/0963 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 15, 2009
From: SANO, ATSUSHI; OTSUKI, KEITARO; MIYAKI, YOUSUKE; TAKAHASHI, TAKESHI; HIGUCHI, AKIJI
To: TDK CORPORATION
Reel/Frame 023386/0690 →