公开(公告)号：US20160111725A1

公开(公告)日：2016-04-21

申请号：US14979629

申请日：2015-12-28

Applicant: TODA KOGYO CORPORATION

Inventor： Manabu Yamamoto ,  Daisuke Nishikawa ,  Kazutoshi Ishizaki ,  Osamu Sasaki ,  Hideaki Sadamura

IPC: H01M4/58 ,  H01M10/0525

CPC classification number: H01M4/5815 ,  C01G53/006 ,  C01G53/54 ,  C01P2002/52 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/45 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/40 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028 ,  H01M2220/30

Abstract: The present invention relates to positive electrode active substance particles comprising a compound having a spinel type structure comprising at least Li, Ni and Mn, and having an Li content which is controlled such that a molar ratio of Li(Ni+Mn) therein is 0.3 to 0.65, an Ni content of 5 to 25% by weight, an Na content of 0.05 to 1.9% by weight and an S content of 0.0005 to 0.16% by weight, a sum of the Na content and the S content being 0.09 to 1.9005% by weight. The positive electrode active substance particles according to the present invention can be suitably used as positive electrode active substance particles for non-aqueous electrolyte secondary batteries which can exhibit a high discharge voltage and an excellent discharge capacity.

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.