公开(公告)号：US20140203218A1

公开(公告)日：2014-07-24

申请号：US14223344

申请日：2014-03-24

Applicant: SHOWA DENKO K.K.

Inventor： Akihisa TONEGAWA ,  Akihiko SHIRAKAWA ,  Isao KABE ,  Gaku ORIJI

IPC: C01B25/45 ,  H01M4/1397 ,  H01M4/04

CPC classification number: C01B25/45 ,  H01M4/0402 ,  H01M4/0471 ,  H01M4/1397 ,  H01M4/366 ,  H01M4/5825

Abstract: A method is employed for producing a positive electrode active material for a lithium secondary battery that comprises mixing lithium phosphate having a particle diameter D90 of 100 μm or less, an M element-containing compound having a particle diameter D90 of 100 μm or less (where, M is one type or two or more types of elements selected from the group consisting of Mg, Ca, Fe, Mn, Ni, Co, Zn, Ge, Cu, Cr, Ti, Sr, Ba, Sc, Y, Al, Ga, In, Si, B and rare earth elements) and water, adjusting the concentration of the M element with respect to water to 4 moles/L or more to obtain a raw material, and producing olivine-type LiMPO4 by carrying out hydrothermal synthesis using the raw material.

Abstract translation: 制造锂二次电池用正极活性物质的方法是将粒径D90为100μm以下的磷酸锂与粒径D90为100μm以下的M元素化合物混合（其中， M是从Mg，Ca，Fe，Mn，Ni，Co，Zn，Ge，Cu，Cr，Ti，Sr，Ba，Sc，Y，Al中选出的一种或两种以上的元素， Ga，In，Si，B和稀土元素）和水，将M元素相对于水的浓度调节至4摩尔/ L以上，得到原料，通过进行水热合成来制造橄榄石型LiMPO 4 使用原料。

公开(公告)号：US20220399538A1

公开(公告)日：2022-12-15

申请号：US17775477

申请日：2020-11-10

Applicant: SHOWA DENKO K.K.

Inventor： Akihisa TONEGAWA ,  Hirofumi INOUE ,  Daisuke KOHNO ,  Jinseok BAEK

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/485 ,  H01M4/583

Abstract: An object of the present invention is to provide a composite material usable as a negative electrode material of a lithium-ion secondary battery.
A composite material of the present invention includes: a carbonaceous material; and a metal oxide layer coating a surface of the carbonaceous material, in which the metal oxide layer coats the surface of the carbonaceous material, forming a sea-island structure in which the metal oxide layer is scattered in islands, and a coating rate of the carbonaceous material with the metal oxide layer is 20% or more and 80% or less.
A composite material of the present invention includes: a carbonaceous material; and a metal oxide layer and amorphous carbon layer coating the surface of the carbonaceous material, in which the metal oxide layer is scattered in islands on the surface of the carbonaceous material.
A composite material of the present invention includes: a carbonaceous material; and a metal oxide layer coating the surface of the carbonaceous material, in which the metal oxide layer has at least a portion having a thickness of more than 10 nm, and in a coated area with the metal oxide, an area percentage of a portion having a thickness of 10 nm or less is 70% or more and 99% or less, and an area percentage of the portion having a thickness of more than 10 nm is 1% or more and 30% or less. A composite material of the present invention also includes: a carbonaceous material; and a metal oxide layer and amorphous carbon layer coating the surface of the carbonaceous material, in which the metal oxide layer has at least a portion having a thickness of more than 10 nm, and in a coated area with the metal oxide layer, an area percentage of a portion having a thickness of 10 nm or less is 30% or more and 70% or less, and an area percentage of the portion having a thickness of more than 10 nm is 30% or more and 70% or less.

公开(公告)号：US20140199475A1

公开(公告)日：2014-07-17

申请号：US14217995

申请日：2014-03-18

Applicant: SHOWA DENKO K.K.

Inventor： Akihisa TONEGAWA ,  Akihiko SHIRAKAWA ,  Isao KABE ,  Gaku ORIJI

IPC: C01B25/16

CPC classification number: C01B25/16 ,  H01M4/0471 ,  H01M4/139 ,  H01M4/366 ,  H01M4/5825 ,  H01M10/052 ,  Y02P20/134

Abstract: A positive electrode active material for a lithium secondary battery having a core portion and a shell layer is employed in which the core portion is represented by Lix1M1y1Pz1O4 (where, M1 represents an element such as Mg, Ca, Fe or Mn, and the letters x1, y1 and z1 representing composition ratios are respectively such that 0

Abstract translation: 使用具有芯部和壳层的锂二次电池用正极活性物质，其中芯部由Lix1M1y1Pz1O4表示（其中，M1表示Mg，Ca，Fe或Mn等元素，字母x1 ，表示组成比的y1和z1分别使得0

公开(公告)号：US20200227746A1

公开(公告)日：2020-07-16

申请号：US16637430

申请日：2018-08-08

Applicant: SHOWA DENKO K.K.

Inventor： Xu WANG ,  Ayaka IKADO ,  Akihisa TONEGAWA ,  Yasuaki WAKIZAKA

IPC: H01M4/587 ,  H01M10/0525 ,  H01M4/36 ,  C01B32/21

Abstract: A negative electrode active material for a secondary battery including an artificial flake graphite A and an artificial lump graphite B and having a ratio D50(A)/D50(B) of 50% particle diameter D50(A) of the artificial flake graphite A in a volume-based particle size distribution to 50% particle diameter D50(B) of the artificial lump graphite B in a volume-based particle size distribution is more than 0.6 and less than 1.0. The artificial flake graphite A has a surface roughness R of not less than 2.8 and not more than 5.1, the artificial lump graphite B has a surface roughness R of not less than 6.0 and not more than 9.0, and a ratio B/(A+B) of a mass of the artificial lump graphite B to the total mass of the artificial flake graphite A and the artificial lump graphite B is not less than 0.03 and not more than 0.30.

公开(公告)号：US20180029891A1

公开(公告)日：2018-02-01

申请号：US15552830

申请日：2016-02-16

Applicant: SHOWA DENKO K.K.

Inventor： Akihisa TONEGAWA ,  Daisuke KOHNO ,  Daisuke HARADA ,  Yasuaki WAKIZAKA

IPC: C01B32/205 ,  H01M10/0525 ,  H01M4/133 ,  H01M4/66 ,  H01M4/62 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0569 ,  H01M4/583

Abstract: The present provides a carbon material containing 50 to 1,000 ppm by mass of vanadium (V), wherein a mean particle diameter D50 is 3 to 7 μm; a tapping density after 400 times of tapping is 0.40 to 1.00 g/cm3; a BET specific surface area is 4.0 to 12.0 m2/g; an R value (ID/IG) measured in the spectrum observed by Raman spectroscopy is 0.10 to 0.30; and an interplanar spacing d002 of plane (002) (nm) and Lc002 (nm) as being the size in the c-axis direction of the graphite crystals satisfy the relationship represented by the following formulae (1) and (2) 0.3362≦d002≦0.3370   (1) −23660×d002+8010≦Lc002≦−23660×d002+8025   (2); which is suitable for a non-aqueous electrolytic secondary battery having a low resistance and a high coulomb efficiency; a method for producing the same; a carbon material for a battery electrode; an electrode; and a lithium-ion secondary battery using the above-described carbon material.