公开(公告)号：US11072869B2

公开(公告)日：2021-07-27

申请号：US16057982

申请日：2018-08-08

Applicant: TODA KOGYO CORPORATION

Inventor： Hiroyasu Watanabe ,  Daisuke Morita ,  Manabu Yamamoto ,  Kazumichi Koga ,  Akihisa Kajiyama ,  Hiroaki Masukuni ,  Hideaki Sadamura ,  Ryuta Masaki ,  Kazutoshi Matsumoto

IPC: H01M4/505 ,  H01M4/525 ,  C30B1/10 ,  C01G45/12 ,  C01G51/00 ,  C01G53/00 ,  C30B1/02

Abstract: The present invention provides a precursor of positive electrode active substance particles for non-aqueous electrolyte secondary batteries which have a high discharge voltage and a high discharge capacity, hardly suffer from side reactions with an electrolyte solution, and are excellent in cycle characteristics, positive electrode active substance particles for non-aqueous electrolyte secondary batteries, and processes for producing these particles, and a non-aqueous electrolyte secondary battery. The present invention relates to positive electrode active substance particles for non-aqueous electrolyte secondary batteries having a spinel structure with a composition represented by the following chemical formula (1), in which the positive electrode active substance particles satisfy the following characteristic (A) and/or characteristic (B) when indexed with Fd-3m in X-ray diffraction thereof: (A) when indexed with Fd-3m in X-ray diffraction of the positive electrode active substance particles, a ratio of I(311) to I(111) [I(311)/I(111)] is in the range of 35 to 43%, and/or (B) when indexed with Fd-3m in X-ray diffraction of the positive electrode active substance particles, a gradient of a straight line determined by a least square method in a graph prepared by plotting sin θ in an abscissa thereof and B cos θ in an ordinate thereof wherein B is a full-width at half maximum with respect to each peak position 2θ (10 to 90°) is in the range of 3.0×10−4 to 20.0×10−4; and Li1+xMn2−y−zNiyMzO4  Chemical Formula (1) wherein x, y, z fall within the range of −0.05·x·0.15, 0.4·y·0.6 and 0·z·0.20, respectively; and M is at least one element selected from the group consisting of Mg, Al, Si, Ca, Ti, Co, Zn, Sb, Ba, W and Bi.

公开(公告)号：US10056612B2

公开(公告)日：2018-08-21

申请号：US15147023

申请日：2016-05-05

Applicant: TODA KOGYO CORPORATION

Inventor： Kazumichi Koga ,  Masayuki Uegami ,  Hiroaki Masukuni ,  Kazutoshi Matsumoto ,  Kazutoshi Ishizaki ,  Hideaki Sadamura

IPC: H01B1/08 ,  H01M4/505 ,  H01M4/04 ,  H01M4/485 ,  C01G45/02 ,  C01G45/12 ,  H01M10/0525 ,  H01M4/46

CPC classification number: H01M4/505 ,  C01G45/02 ,  C01G45/1242 ,  C01P2002/52 ,  C01P2002/77 ,  C01P2004/03 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/80 ,  H01B1/08 ,  H01M4/0471 ,  H01M4/46 ,  H01M4/485 ,  H01M10/0525

Abstract: This invention provides lithium manganate which has a high output and is excellent in high-temperature stability. This invention relates to lithium manganate particles which are produced by mixing a lithium compound, a manganese compound, a Y compound and an A compound and then calcining the resulting mixture, and have a composition represented by the following chemical formula 1 and an average secondary particle diameter (D50) of 1 to 15 μm, in which Y is at least one element selected from the group consisting of Al and Mg; A is a sintering aid element having a melting point of not higher than 850° C.; x and y satisfy 0.03≤x≤0.15 and 0≤y≤0.20, respectively; z is in the range of 0 to 2.5 mol % based on Mn, wherein the lithium manganate particles have a sulfur content of not more than 100 ppm. Li1+xMn2-x-yYyO4zA  (Chemical Formula 1)