公开(公告)号：US20180337401A1

公开(公告)日：2018-11-22

申请号：US15976713

申请日：2018-05-10

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Huan NI ,  Yujun CHEN ,  Xinliang KUANG ,  Xuguang GAO ,  Long WANG ,  Na LIU

IPC: H01M4/36 ,  C01B25/36 ,  C01G53/00 ,  H01M4/62 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525

CPC classification number: H01M4/366 ,  C01B25/36 ,  C01G53/42 ,  C01G53/50 ,  C01P2004/03 ,  C01P2004/80 ,  C01P2006/40 ,  H01M4/0471 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/505 ,  H01M4/525 ,  H01M4/628 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/028 ,  H01M2220/20

Abstract: The present disclosure provides a preparation method of a modified positive electrode active material preparation method, which comprising steps of: dispersing a positive electrode active material matrix into an alcohol solvent to form a positive electrode active material matrix suspension; dissolving an alcohol-soluble aluminum salt in an alcohol solvent to form an alcohol-soluble aluminum salt solution; dissolving an alcohol-soluble phosphorous compound in an alcohol solvent to form an alcohol-soluble phosphorous compound solution; mixing the alcohol-soluble aluminum salt solution and the alcohol-soluble phosphorous compound solution and heating to react, obtaining a liquid-phase coating solution which contains aluminum phosphate after the reaction is finished; mixing and stirring the positive electrode active material matrix suspension and the liquid-phase coating solution which contains aluminum phosphate, extraction filtrating and obtaining a filter cake after the stirring is finished, then drying and baking the filter cake, finally obtaining a modified positive electrode active material.

公开(公告)号：US20180323436A1

公开(公告)日：2018-11-08

申请号：US15968654

申请日：2018-05-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yujun CHEN ,  Xinliang KUANG ,  Long WANG ,  Na LIU ,  Huan NI

IPC: H01M4/62 ,  H01M4/36 ,  H01M4/525 ,  H01M4/505 ,  B01J13/08 ,  H01M10/0525

CPC classification number: H01M4/628 ,  B01J13/08 ,  H01M4/0404 ,  H01M4/0471 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M4/622 ,  H01M4/624 ,  H01M10/0525 ,  H01M2004/028

Abstract: The present disclosure provides a modified positive electrode active material. The modified positive electrode active material comprises a positive electrode active material inner core; a metal oxide layer comprising a metal oxide and coated on a surface of the positive electrode active material inner core; and a polymer layer comprising a polymer and coated on a surface of the metal oxide layer, the polymer being one or more selected from a group consisting of polyacrylic acid, polymethyl methacrylate, polyacrylamide and lithium polyacrylate. The modified positive electrode active material of the present disclosure has better structure stability and thermal stability, when the modified positive electrode active material is applied in the electrochemical energy storage device, cycle performance and safety performance of the electrochemical energy storage device can be significantly improved without decreasing energy density of the electrochemical energy storage device.