公开(公告)号：US20240279064A1

公开(公告)日：2024-08-22

申请号：US18569486

申请日：2022-10-03

申请人： Resonac Corporation

发明人： Yuji ITO ,  Akihisa TONEGAWA ,  Takayuki KURITA ,  Masato FUJITA ,  Hirofumi INOUE

IPC分类号： C01B32/05 ,  H01M10/0525

CPC分类号： C01B32/05 ,  H01M10/0525 ,  C01P2002/70 ,  C01P2002/82 ,  C01P2002/85 ,  C01P2004/03 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/16 ,  C01P2006/40

摘要： A composite particle including carbon and silicon, in which the composite particle contains a crystalline metal oxide particle, and the end of the metal oxide particle is present inside the surface of the composite particle, and pores are present on the surface of the composite particle. According to the present invention, there can be provided a composite particle, in which silicon is attached to the inside of fine pores of a carbon material that has been provided with specific fine pores, the composite particle also contains a crystalline metal oxide particle, the end of the metal oxide particle is present inside the surface of the composite particle, and furthermore, pores are present on the surface of the composite particle. By using this composite particle, a lithium-ion secondary battery with excellent rate characteristics and cycle characteristics can be provided.

公开(公告)号：US20240120481A1

公开(公告)日：2024-04-11

申请号：US18534281

申请日：2023-12-08

申请人： Resonac Corporation

发明人： Daisuke HARADA ,  Hirofumi INOUE ,  Daisuke KOHNO ,  Akihisa TONEGAWA

IPC分类号： H01M4/58 ,  H01M4/62 ,  H01M10/0525

CPC分类号： H01M4/5825 ,  H01M4/625 ,  H01M10/0525 ,  H01M2004/021

摘要： A positive electrode mixture layer for a lithium-ion secondary battery suitable for producing a lithium-ion secondary battery with high rate characteristics at an ordinary temperature and low temperatures and low internal resistance (DCR) at low temperatures, characterized by including a positive electrode active material, a binder, and a conductive additive, in which the conductive additive includes carbon black, a carbon nanotube (1) having an average fiber diameter of 80 to 400 nm, and a carbon nanotube (2) having an average fiber diameter of 0.4 to 3.0 nm, the content rates of the carbon black, the carbon nanotube (1), and the carbon nanotube (2) in the conductive additive are 40 to 80% by mass, 10 to 50% by mass, and 1 to 30% by mass, respectively, and the content rate of the conductive additive in the positive electrode mixed layer is 0.1 to 5.0% by mass.