公开(公告)号：US20190280300A1

公开(公告)日：2019-09-12

申请号：US16345490

申请日：2017-10-25

Applicant: NEC CORPORATION

Inventor： Katsumi MAEDA ,  Noriyuki TAMURA ,  Mika SHIBA

IPC: H01M4/62 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525 ,  H01M4/131 ,  H01M4/587 ,  H01M4/133 ,  H01M10/0568 ,  H01M10/0567

Abstract: An electrode for lithium ion secondary batteries, including a porous glass particle and a positive electrode active material or negative electrode active material that is capable of occluding and releasing lithium ions wherein the pore volume of the porous glass particle is from 0.1 ml/g to 2 ml/g, is used to provide a lithium ion secondary battery excellent in a charge rate property.

公开(公告)号：US20190044182A1

公开(公告)日：2019-02-07

申请号：US15759662

申请日：2016-08-08

Applicant: NEC CORPORATION

Inventor： Katsumi MAEDA ,  Noriyuki TAMURA ,  Mika SHIBA

IPC: H01M10/0525 ,  H01M4/485 ,  H01M4/587 ,  H01M10/0567 ,  H01M10/0569 ,  H01M10/0568

Abstract: Provided are a lithium secondary battery high in capacity and excellent in charge and discharge rate characteristics, and a method for producing the same. The lithium secondary battery of the present invention includes a positive electrode containing a positive electrode active substance containing a lithium transition metal oxide, a negative electrode containing a negative electrode active substance containing a heat-treated graphite material, and an electrolytic solution, wherein the heat-treated graphite material has passages of lithium ions penetrating at least one or more layers of graphene layers from the surface of a graphene stacking structure; and the electrolytic solution contains lithium difluorophosphate.