公开(公告)号：US20190067676A1

公开(公告)日：2019-02-28

申请号：US16074793

申请日：2017-02-21

Applicant: Panasonic Intellectual Property Management Co. Ltd.

Inventor： KENICHI NAGAMITSU ,  ATSURO SHIRAKAMI

IPC: H01M4/04 ,  H01M10/0525 ,  H01M10/0566 ,  H01M10/0585 ,  H01M10/0587 ,  H01M4/36 ,  H01M4/38 ,  H01M4/134 ,  H01G11/28 ,  H01G11/50 ,  H01G11/52 ,  H01G11/58 ,  H01G11/86 ,  H01G11/06

Abstract: A negative electrode for an electrochemical device includes: a negative current collector; a first negative electrode active material layer supported on a first surface of the negative current collector; and a second negative electrode active material layer supported on a second surface of the negative current collector. And capacity C1 per unit mass of the first negative electrode active material layer is greater than capacity C2 per unit mass of the second negative electrode active material layer. As a result, it is possible to provide a negative electrode suited for an electrochemical device having high capacitance, the electrochemical device being manufactured by pre-doping the negative electrode with lithium ions.