Publication number: 20170110731
Abstract: The present invention provides an olivine-type positive active material precursor for a lithium battery that includes MXO4-zBz (wherein M is one element selected from the group consisting of Fe, Ni, Co, Mn, Cr, Zr, Nb, Cu, V, Ti, Zn, Al, Ga, Mg, B, and a combination thereof, X is one element selected from the group consisting of P, As, Bi, Sb, and a combination thereof, B is one element selected from the group consisting of F, S, and a combination thereof, and 0?z?0.5) particles, and the precursor has a particle diameter of 1 to 20 ?m, a tap density of 0.8 to 2.1 g/cm3, and a specific surface area of 1 to 10 m2/g. The olivine-type positive active material prepared using the olivine-type positive active material precursor has excellent crystallinity of particles, a large particle diameter, and a high tap density, and therefore shows excellent electrochemical characteristics and capacity per unit volume.
Type:
Application
Filed:
December 27, 2016
Publication date:
April 20, 2017
Inventors:
Yang-Kook SUN, Sung-Woo OH, Hyun-Joo BANG, Seung Min OH
Patent number: 9570746
Abstract: The present invention provides an olivine-type positive active material precursor for a lithium battery that includes MXO4-zBz (wherein M is one element selected from the group consisting of Fe, Ni, Co, Mn, Cr, Zr, Nb, Cu, V, Ti, Zn, Al, Ga, Mg, B, and a combination thereof, X is one element selected from the group consisting of P, As, Bi, Sb, and a combination thereof, B is one element selected from the group consisting of F, S, and a combination thereof, and 0?z?0.5) particles, and the precursor has a particle diameter of 1 to 20 ?m, a tap density of 0.8 to 2.1 g/cm3, and a specific surface area of 1 to 10 m2/g. The olivine-type positive active material prepared using the olivine-type positive active material precursor has excellent crystallinity of particles, a large particle diameter, and a high tap density, and therefore shows excellent electrochemical characteristics and capacity per unit volume.
Type:
Grant
Filed:
March 25, 2009
Date of Patent:
February 14, 2017
Assignee:
IUCF-HYU (INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY)
Inventors:
Yang-Kook Sun, Sung-Woo Oh, Hyun-Joo Bang, Seung Min Oh