Publication number: 20190181444
Abstract: A positive-electrode material for a lithium ion secondary battery contains a lithium complex compound that is represented by the formula: Li1+aNibMncCodTieMfO2+?, and has an atomic ratio Ti3+/Ti4+ between Ti3+ and Ti4+, as determined through X-ray photoelectron spectroscopy, of greater than or equal to 1.5 and less than or equal to 20. In the formula, M is at least one element selected from the group consisting of Mg, Al, Zr, Mo, and Nb, and a, b, c, d, e, f, and ? are numbers satisfying ?0.1?a?0.2, 0.7<b?0.9, 0?c<0.3, 0?d<0.3, 0<e?0.25, 0?f<0.3, b+c+d+e+f=1, and ?0.2???0.2.
Type:
Application
Filed:
February 20, 2019
Publication date:
June 13, 2019
Applicant:
HITACHI METALS, LTD.
Inventors:
Akira GUNJI, Hisato TOKORO, Shin TAKAHASHI, Tatsuya TOYAMA, Hiroshi HARUNA, Daiko TAKAMATSU, Takashi NAKABAYASHI, Shuichi TAKANO
Publication number: 20170358799
Abstract: A positive-electrode material for a lithium ion secondary battery contains a lithium complex compound that is represented by the formula: Li1+aNibMncCodTieMfO2+?, and has an atomic ratio Ti3+/Ti4+ between Ti3+ and Ti4+, as determined through X-ray photoelectron spectroscopy, of greater than or equal to 1.5 and less than or equal to 20. In the formula, M is at least one element selected from the group consisting of Mg, Al, Zr, Mo, and Nb, and a, b, c, d, e, f, and ? are numbers satisfying ?0.1?a?0.2, 0.7<b?0.9, 0?c<0.3, 0?d<0.3, 0<e?0.25, 0?f<0.3, b+c+d+e+f=1, and ?0.2???0.2.
Type:
Application
Filed:
November 9, 2016
Publication date:
December 14, 2017
Applicant:
HITACHI METALS, LTD.
Inventors:
Akira GUNJI, Hisato TOKORO, Shin TAKAHASHI, Tatsuya TOYAMA, Hiroshi HARUNA, Daiko TAKAMATSU, Takashi NAKABAYASHI, Shuichi TAKANO