公开(公告)号：US20230216065A1

公开(公告)日：2023-07-06

申请号：US18007535

申请日：2020-07-11

Applicant: DOWA ELECTRONICS MATERIALS CO., LTD.

Inventor： Shintaro OGAWA ,  Kazumasa IKARI ,  Toshihiko UEYAMA

IPC: H01M4/90 ,  H01M8/1246

CPC classification number: H01M4/9033 ,  H01M4/9091 ,  H01M8/1246 ,  H01M2008/1293

Abstract: A perovskite-type composite oxide powder is a perovskite-type composite oxide powder represented by a general formula ABO3-δ (where δ represents an amount of deficiency of oxygen and 0≤δ

公开(公告)号：US20230197972A1

公开(公告)日：2023-06-22

申请号：US17925724

申请日：2020-08-07

Applicant: DOWA ELECTRONICS MATERIALS CO., LTD.

Inventor： Kazumasa IKARI ,  Shintaro OGAWA ,  Toshihiko UEYAMA

IPC: H01M4/90 ,  H01M8/1246

CPC classification number: H01M4/9016 ,  H01M8/1246 ,  H01M2008/1293

Abstract: A composite oxide powder including a composition formula (1), wherein the ratio α/β of a surface area value α(m2/g) calculated by a BET one-point method to a surface area value β(m2/g) calculated from a formula (2) is greater than 1.0 and equal to or less than 1.5 and the surface area value α is equal to or less than 20 m2/g. ABO3-δ (1) (wherein A is one or more types of elements (La, Sr, Sm, Ca and Ba), B is one or more types of elements (Fe, Co, Ni and Mn) and 0≤δ

公开(公告)号：US20250167251A1

公开(公告)日：2025-05-22

申请号：US18869574

申请日：2024-03-12

Applicant: DOWA ELECTRONICS MATERIALS CO., LTD.

Inventor： Yusuke IIDA ,  Kazumasa IKARI ,  Shintaro OGAWA

IPC: H01M4/90 ,  H01M8/12

Abstract: A perovskite-type composite oxide powder according to the present invention includes: La; and at least one type of element selected from the group consisting of Sr, Ca, Co, Ni, Mn and Fe, a BET specific surface area is less than 6.0 m2/g and a formula (1) below is satisfied: 1 ≤ { ( D 9 ⁢ 0 ⁢ B - D 1 ⁢ 0 ⁢ B ) / D 5 ⁢ 0 ⁢ B } / { ( D 9 ⁢ 0 ⁢ A - D 1 ⁢ 0 ⁢ A ) / D 5 ⁢ 0 ⁢ A } ≤ 2 . 1 ( 1 ) in the formula, D10 is a cumulative 10% particle size by volume, D50 is a cumulative 50% particle size by volume and D90 is a cumulative 90% particle size by volume when a measurement was performed with a particle size distribution measuring device that uses a laser diffraction/scattering method, and a subscript “A” indicates a particle size after ultrasonic dispersion and a subscript “B” indicates a particle size before ultrasonic dispersion.

公开(公告)号：US20240266552A1

公开(公告)日：2024-08-08

申请号：US18681170

申请日：2022-09-06

Applicant: DOWA ELECTRONICS MATERIALS CO., LTD.

Inventor： Toshihiko UEYAMA ,  Kazumasa IKARI ,  Shintaro OGAWA

IPC: H01M4/90 ,  H01M12/06

CPC classification number: H01M4/9033 ,  H01M12/06 ,  H01M2300/0065

Abstract: In a perovskite-type composite oxide powder according to the present invention, the geometric standard deviation value of the maximum Feret diameter of the perovskite-type composite oxide powder calculated by performing image analysis on an SEM image acquired with a scanning electron microscope is equal to or greater than 1.01 and less than 1.60, and when it is assumed that the perovskite-type composite oxide powder is spherical, the ratio (B/A) of an area value B directly calculated by the image analysis to an area value A calculated from the maximum Feret diameter is equal to or greater than 0.7 and less than 1.0. In this way, the perovskite-type composite oxide powder is used as the air electrode material of an SOFC, and thus high conductivity as compared with a conventional air electrode material is obtained.