PRODUCTION METHOD FOR LITHIUM ION SECONDARY BATTERY POSITIVE ELECTRODE ACTIVE MATERIAL, LITHIUM ION SECONDARY BATTERY POSITIVE ELECTRODE ACTIVE MATERIAL, AND LITHIUM ION SECONDARY BATTERY

    公开(公告)号:EP4223701A1

    公开(公告)日:2023-08-09

    申请号:EP21875494.3

    申请日:2021-09-27

    摘要: An object of the present invention is to achieve a high capacity and suppress a decrease in capacity when charging and discharging repeatedly, which is a drawback of LNO, by suppressing a structural change associated with charge and discharge.
    The present invention is characterized by comprising: a mixing process of mixing a lithium-transition metal composite oxide with lithium phosphate; a milling process of applying a mechanical stress to a mixture obtained in the mixing process to form the lithium-transition metal composite oxide having a crystal structure of a layered structure and the lithium phosphate into an amorphous or low-crystalline NiO-like rock-salt type crystal structure; and a heat treatment process of subjecting the mixture obtained in the milling process to a heat treatment to obtain a lithium-transition metal composite oxide having a layered rock-salt type crystal structure in which lithium phosphate is finely crystallized and dispersed, wherein the lithium-transition metal composite oxide is represented by a general formula: Li s Ni 1-x-y-z Co x Mn y M z O 2+α , and the finely crystallized lithium phosphate covers a surface of a primary particle of the lithium-transition metal composite oxide having the layered rock-salt type crystal structure, and is dispersed inside or on a surface of a secondary particle of the lithium-transition metal composite oxide having the layered rock-salt type crystal structure.

    SEALING DEVICE
    10.
    发明公开
    SEALING DEVICE 审中-公开

    公开(公告)号:EP3508762A1

    公开(公告)日:2019-07-10

    申请号:EP18848886.0

    申请日:2018-07-19

    摘要: A countermeasure to seal squealing is performed at a low price using an extremely simple configuration without greatly modifying constituent elements of a seal which costs a great amount of time and money. An annular shape of grease lip portions 31b is not symmetrical to a rotational center of a fixing member 31A. Therefore, a relative rotational center B of contacting target portions 31b1 of the grease lip portions 31b is eccentric by a distance ε with respect to a rotational center A of a rotating shaft 11A. When a slinger 21A rotates, a friction force F is generated between the contacting target portions 31b1 of the grease lip portions 31b and a flange surface 21b1. In a housing 41A which supports the fixing member 31A, torsion is generated by the friction force F and a restoring force which is centered on the relative rotational center B acts on the contacting target portions 31b1 against the torsion. The contacting target portions 31b1 receive a rotational drive force from the flange surface 21b1 in a direction which intersects a restoring direction of the restoring force in a predetermined angle range and a rotational drive component which orthogonally intersects the restoring direction of the restoring force is applied to the contacting target portions 31b1 from the flange surface 21b1.