-
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
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)
-
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
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：US09847526B2
公开(公告)日：2017-12-19
申请号：US15019322
申请日：2016-02-09
Applicant: TODA KOGYO CORPORATION
Inventor： Akinori Yamamoto , Tomoko Okita , Hiroshi Yamamoto , Kohji Mori , Kazumichi Koga , Akihisa Kajiyama
IPC: H01B1/08 , H01M4/485 , H01M10/0525 , C01G23/00 , H01M4/02
CPC classification number: H01M4/485 , C01G23/005 , C01G23/006 , C01P2002/32 , C01P2002/60 , C01P2002/70 , C01P2002/72 , C01P2002/76 , C01P2002/77 , C01P2004/03 , C01P2004/80 , C01P2006/12 , C01P2006/40 , H01B1/08 , H01M10/0525 , H01M2004/027 , Y02E60/122 , Y02P70/54
Abstract: According to the present invention, there are provided lithium titanate particles which exhibit an excellent initial discharge capacity and an enhanced high-efficiency discharge capacity retention rate as an active substance for non-aqueous electrolyte secondary batteries and a process for producing the lithium titanate particles, and Mg-containing lithium titanate particles.
-
-
Search Results
3
records
(took 0.013 seconds)
