The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 25, 2015
Filed:
Sep. 13, 2012
Shigeki Okada, Nishio, JP;
Ryuta Sugiura, Toyohashi, JP;
Akira Urakawa, Nagoya, JP;
Kazuki Maeda, Nagoya, JP;
Tsutomu Nanataki, Toyoake, JP;
Shigeki Okada, Nishio, JP;
Ryuta Sugiura, Toyohashi, JP;
Akira Urakawa, Nagoya, JP;
Kazuki Maeda, Nagoya, JP;
Tsutomu Nanataki, Toyoake, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A cathode active material precursor particle, a method for producing thereof and a method for producing cathode active material for a lithium secondary battery. The cathode active material precursor particle is capable of forming a cathode active material for a lithium secondary battery including a lithium composite oxide having a layered rock salt structure through lithium incorporation. The particles are characterized by the cathode active material precursor particle being formed into a substantially spherical shape and includes therein a large number of voids in a substantially uniform manner; and the cathode active material precursor particle has: an average particle diameter D50 of 0.5 to 5 μm; a specific surface area of 3 to 25 m/g; and a relative tap density, which is a value obtained by dividing a tap density by a theoretical density of a material constituting the cathode active material precursor particle, of 0.25 to 0.4.