公开(公告)号：US20180254476A1

公开(公告)日：2018-09-06

申请号：US15552084

申请日：2016-02-17

Applicant: I.S.T Corporation

Inventor： Kae FUJIWARA

IPC: H01M4/36 ,  H01M4/62 ,  H01M4/38 ,  H01M4/48 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0569 ,  C08G73/10

Abstract: A polyimide-coated active material particle (21) of the present invention includes an active material particle (23) and a polyimide layer (24) derived from a monomeric polyimide precursor and coated on the active material particle (23). A negative electrode (200) of the present invention includes a current collector (30) and an active material layer (20) including the negative electrode active material particle (21) coated with the polyimide layer (24) derived from a monomeric polyimide precursor, and an aqueous binder (22). With the polyimide-coated active material particle of the present invention, it is possible to suppress the amount of organic solvent used and improve the charge-discharge cycle of the electrode.