公开(公告)号：EP4155267A1

公开(公告)日：2023-03-29

申请号：EP21808816.9

申请日：2021-03-12

Applicant: OSAKA Titanium Technologies Co., Ltd.

Inventor： TAKESHITA, Kohki ,  KASHITANI, Yusuke

IPC: C01B33/113 ,  H01M4/38 ,  C23C14/00 ,  C23C14/08

Abstract: An object of the present invention is to provide active material particles excellent in ion uptake ability. The silicon-based active material particles according to the present invention comprise a layer structure. Here, the "silicon-based active material particles" are, for example, active material particles for forming a negative electrode of a lithium ion secondary battery. Examples of the active material particles for forming the negative electrode of the lithium ion secondary battery include so-called Si-based active materials such as silicon (Si), silicon oxide (SiO x ), metal element-containing silicon oxide containing alkaline metal elements such as lithium (Li) and alkaline earth metal elements such as magnesium (Mg), silicon alloys. The thickness of the layer in the active material particles is preferably 1µm or less. Here, the thickness of the layer is preferably 0.01µm or more.

公开(公告)号：EP3236521A1

公开(公告)日：2017-10-25

申请号：EP15869515.5

申请日：2015-12-07

Applicant: OSAKA Titanium Technologies Co., Ltd.

Inventor： KIZAKI, Shingo ,  KASHITANI, Yusuke ,  TAKESHITA, Kohki

IPC: H01M4/485 ,  H01M4/36

CPC classification number: H01M4/36 ,  C01B33/20 ,  C01P2002/74 ,  C01P2004/51 ,  C01P2004/64 ,  C01P2006/12 ,  H01M4/485

Abstract: This invention provides a powder for a negative electrode of a lithium ion secondary battery, which is a powder that includes a silicon oxide powder containing Li. When a molar ratio between Li, Si and O is taken as y:1:x, the average composition of the powder overall satisfies the relation 0.5 α ray, a relation P2/P1 ≤ 1.0 and a relation P3/P1 ≤ 1.0 are satisfied, where P1 represents a height of a peak attributed to Li 2 SiO 3 , P2 represents a height of a peak attributed to crystalline Si, and P3 represents a height of a peak attributed to Li 4 SiO 4 . When this powder is used for a negative electrode of a lithium ion secondary battery, the initial efficiency and the capacity retention rate over a long-term cycle can be increased.

Abstract translation: 本发明提供一种锂离子二次电池的负极用粉末，其是包含含有Li的氧化硅粉末的粉末。 当Li，Si和O之间的摩尔比为y:1:x时，粉末的平均组成满足关系0.5