公开(公告)号：US20160056466A1

公开(公告)日：2016-02-25

申请号：US14779254

申请日：2014-03-27

Applicant: NEC CORPORATION

Inventor： Noriyuki TAMURA ,  Qian CHENG ,  Ryota YUGE

IPC: H01M4/587 ,  H01M10/052 ,  H01M4/48 ,  H01M4/133

CPC classification number: H01M4/587 ,  H01M4/133 ,  H01M4/483 ,  H01M10/052 ,  H01M2004/027

Abstract: The present invention has an object to provide a negative electrode carbon material capable of providing a lithium secondary battery improved in the capacity characteristic, and a negative electrode for a lithium secondary battery and a lithium secondary battery using the negative electrode carbon material. The negative electrode carbon material for a lithium secondary battery according to the present invention comprises an oxidized amorphous carbon material comprising oxidized graphene layers. The oxidized amorphous carbon material can be obtained by subjecting an amorphous carbon to an oxidation treatment so that graphene layers of carbon crystallites contained in the amorphous carbon are oxidized.

Abstract translation: 本发明的目的是提供能够提供容量特性提高的锂二次电池的负极碳材料，以及使用负极碳材料的锂二次电池用负极和锂二次电池。 根据本发明的用于锂二次电池的负极碳材料包括氧化的无定形碳材料，其包含氧化石墨烯层。 氧化的无定形碳材料可以通过使无定形碳进行氧化处理，使得包含在无定形碳中的碳微晶石墨烯层被氧化而获得。

公开(公告)号：US20180248194A1

公开(公告)日：2018-08-30

申请号：US15753781

申请日：2015-08-21

Applicant: NEC CORPORATION

Inventor： Qian CHENG ,  Noriyuki TAMURA

IPC: H01M4/62 ,  C01B32/184 ,  H01M10/0525

CPC classification number: H01M4/625 ,  C01B32/184 ,  C01B32/192 ,  C01B2204/02 ,  C01B2204/04 ,  C01B2204/22 ,  C01P2006/10 ,  C01P2006/14 ,  C01P2006/16 ,  H01M4/587 ,  H01M10/052 ,  H01M10/0525 ,  H01M2220/20 ,  Y02E60/122 ,  Y02T10/7011

Abstract: A porous graphene material with 1 to 200 graphene layers, wherein: at least one monolayer graphene is included; pores with the size of 70 nm to 200 nm are scattered over the surface of the material and the number of pores is 10 to 500 per μm2; an oxygen concentration is below 0.8 atomic %; and the ratio of the peak height (ID) of D band in a Raman scattering spectrum of the material to that of the peak height (IG) of G band at 1,570 to 1,596 cm−1 in the spectrum (ID/IG) is between 1 and 1.35. The porous graphene material is suitable for conductive additives for electrodes of Lithium ion battery.

公开(公告)号：US20170283265A1

公开(公告)日：2017-10-05

申请号：US15506817

申请日：2014-08-29

Applicant: NEC Corporation

Inventor： Qian CHENG ,  Noriyuki TAMURA ,  Kentaro NAKAHARA

IPC: H01M10/0525 ,  H01M4/62 ,  C01B31/04 ,  H01M4/38

CPC classification number: H01M10/0525 ,  C01B32/05 ,  C01B32/182 ,  C01P2004/61 ,  H01M4/131 ,  H01M4/364 ,  H01M4/38 ,  H01M4/587 ,  H01M4/62 ,  H01M10/052 ,  H01M2004/027

Abstract: The present invention provides a novel carbon material comprising a three-dimensional graphene network constituting a plurality of cells interconnecting as a whole, where at least one of the cells has single-layer graphene wall. The carbon material is suitable for a lithium ion battery.

公开(公告)号：US20160190562A1

公开(公告)日：2016-06-30

申请号：US14910045

申请日：2014-08-20

Applicant: NEC CORPORATION

Inventor： Noriyuki TAMURA ,  Ryota YUGE ,  Qian CHENG ,  Kentaro NAKAHARA

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/38 ,  H01M4/525

CPC classification number: H01M4/366 ,  H01M4/131 ,  H01M4/386 ,  H01M4/483 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/027

Abstract: A negative electrode for a lithium ion secondary battery, including a negative electrode active material layer containing a negative electrode active material including silicon (Si) as a constituent element, in which a coating including iron (Fe), manganese (Mn) and oxygen (O) as constituent elements is formed on a surface of the negative electrode active material layer.

Abstract translation: 一种锂离子二次电池用负极，其包含含有作为构成元素的硅（Si）的负极活性物质的负极活性物质层，其中包含铁（Fe），锰（Mn）和氧（ O）作为构成元素形成在负极活性物质层的表面上。

公开(公告)号：US20160056452A1

公开(公告)日：2016-02-25

申请号：US14780949

申请日：2014-03-28

Applicant: NEC CORPORATION

Inventor： Noriyuki TAMURA ,  Qian CHENG ,  Ryota YUGE

IPC: H01M4/133 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/1393 ,  H01M4/36 ,  H01M4/587

CPC classification number: H01M4/133 ,  H01M4/0404 ,  H01M4/0471 ,  H01M4/1393 ,  H01M4/366 ,  H01M4/587 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/027

Abstract: There is provided a negative electrode carbon material for a lithium secondary battery, including a graphite-based material in which holes are formed in a graphene layer plane.

Abstract translation: 提供了一种用于锂二次电池的负极碳材料，其包括其中在石墨烯层平面中形成空穴的石墨基材料。

公开(公告)号：US20170271674A1

公开(公告)日：2017-09-21

申请号：US15506805

申请日：2014-08-29

Applicant: NEC Corporation

Inventor： Qian CHENG ,  Noriyuki TAMURA

IPC: H01M4/587 ,  H01M4/38

Abstract: The present invention provides an anode material for a lithium-ion battery comprising a carbon particle having a particle size of 5 μm to 30 μm, and including defective portions on a surface of the carbon particle, the defective portions being grooves formed by cathodically exfoliating graphene layers from the carbon particle.