公开(公告)号：US20180337399A1

公开(公告)日：2018-11-22

申请号：US15974490

申请日：2018-05-08

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： NOBUHIKO HOJO ,  TAKAYUKI NAKATSUTSUMI ,  TETSUYUKI OKANO ,  MAYUMI MAENISHI ,  MASAHIRO TAKAHATA

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0569

CPC classification number: H01M4/587 ,  H01M4/134 ,  H01M10/0525 ,  H01M10/0569 ,  H01M2300/0034

Abstract: A negative electrode active material for a nonaqueous secondary battery includes graphite containing boron. The graphite has an average discharge potential of 0.16 V or more and 0.2 V or less, based on Li. A nonaqueous secondary battery includes: a positive electrode including a positive electrode active material capable of occluding and releasing an alkali metal ion; a negative electrode including a negative electrode active material above; and a nonaqueous electrolyte solution.

公开(公告)号：US20180337423A1

公开(公告)日：2018-11-22

申请号：US15959290

申请日：2018-04-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： TETSUYUKI OKANO ,  TAKAYUKI NAKATSUTSUMI ,  MAYUMI MAENISHI ,  MASAHIRO TAKAHATA ,  JUNKO MATSUSHITA ,  AKIRA KANO ,  NOBUHIKO HOJO

IPC: H01M10/0525 ,  H01M4/133 ,  H01M4/583 ,  H01M4/134 ,  H01M4/525 ,  H01M4/66 ,  H01M2/06

Abstract: A negative-electrode active material comprises a graphite including boron and nitrogen. A ratio R1 satisfies 0.5≤R1≤1, where R1=SBN/SB, and SB denotes a total peak area of a boron 1s spectrum of the graphite obtained by X-ray photoelectron spectroscopy, and SBN denotes a peak area of a spectrum assigned to boron bonded to nitrogen in the boron 1s spectrum. A ratio R2 satisfies 0