公开(公告)号：US20220140333A1

公开(公告)日：2022-05-05

申请号：US17429868

申请日：2019-09-27

Applicant: BASF TODA Battery Materials LLC ,  GS YUASA INTERNATIONAL LTD.

Inventor： Taisei INOUE ,  Daisuke NISHIKAWA ,  Katsuya INOUE

IPC: H01M4/525 ,  H01M4/505

Abstract: Provided is a “lithium-excess-type” active material having high initial efficiency. Disclosed is a positive active material for a nonaqueous electrolyte secondary battery containing a lithium transition metal composite oxide. In this positive active material, the lithium transition metal composite oxide has an α-NaFeO2 structure, a molar ratio Li/Me of Li to a transition metal (Me) is 1

公开(公告)号：US20220140334A1

公开(公告)日：2022-05-05

申请号：US17429964

申请日：2019-09-27

Applicant: BASF TODA Battery Materials LLC ,  GS YUASA INTERNATIONAL LTD.

Inventor： Taisei INOUE ,  Daisuke NISHIKAWA ,  Katsuya INOUE

IPC: H01M4/525 ,  H01M4/1391 ,  H01M10/052 ,  H01M10/0568 ,  H01M10/0569

Abstract: Provided is a “lithium-excess-type” active material in which a decrease in potential associated with a charge-discharge cycle is suppressed. Disclosed is a positive active material for a nonaqueous electrolyte secondary battery containing a lithium transition metal composite oxide. In this positive active material, the lithium transition metal composite oxide has an α-NaFeO2 structure, a molar ratio Li/Me of Li to a transition metal (Me) is 1.25≤Li/Me≤1.45, Ni and Mn are contained as the transition metal (Me), an X-ray diffraction pattern attributable to a space group R3-m is included, and a half-value width for a diffraction peak of a (104) plane at a Miller index hkl in X-ray diffraction measurement using a CuKα ray is 0.27° or less.