公开(公告)号：US20170214087A1

公开(公告)日：2017-07-27

申请号：US15321649

申请日：2015-06-23

Applicant: NEC Corporation

Inventor： Noboru YOSHIDA ,  Ikiko SHIMANUKI ,  Shinsaku SAITHO ,  Hitoshi ISHIKAWA

IPC: H01M10/0567 ,  H01M4/587 ,  H01M4/133 ,  H01M10/0525 ,  H01M10/0569

CPC classification number: H01M10/0567 ,  H01M4/133 ,  H01M4/587 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0569 ,  H01M10/4235 ,  H01M2220/20 ,  H01M2300/0028 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011

Abstract: The present invention relates to an electrolyte solution comprising a supporting salt, a nonaqueous solvent containing a compound having a viscosity of 1.0 mPa-s or less in an amount of more than 50% by volume in the nonaqueous solvent, and a halogenated cyclic acid anhydride. According to the present invention, an electrolyte solution capable of suppressing gas generation is provided.

公开(公告)号：US20160226099A1

公开(公告)日：2016-08-04

申请号：US15021669

申请日：2014-08-28

Applicant: NEC CORPORATION

Inventor： Takeshi AZAMI ,  Hitoshi ISHIKAWA ,  Noboru YOSHIDA ,  Ikiko SHIMANUKI ,  Kazuaki MATSUMOTO ,  Makihiro OTOHATA

IPC: H01M10/0567 ,  H01M4/131 ,  H01M4/505 ,  H01M10/0568 ,  H01M4/66 ,  H01M4/133 ,  H01M2/16 ,  H01M10/0569 ,  H01M10/0525 ,  H01M4/62

CPC classification number: H01M10/0567 ,  H01M2/1653 ,  H01M4/131 ,  H01M4/133 ,  H01M4/364 ,  H01M4/505 ,  H01M4/587 ,  H01M4/622 ,  H01M4/623 ,  H01M4/625 ,  H01M4/661 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2300/0037 ,  Y02T10/7011

Abstract: The present invention provides a lithium ion secondary battery comprising: a positive electrode; a negative electrode comprising a negative electrode active material comprising at least one carbon material selected from the group consisting of a natural graphite, an artificial graphite, a non-graphitizable carbon and a graphitizable carbon; and an electrolyte solution comprising a specific cyclic disulfonate ester compound and an acid anhydride.

Abstract translation: 本发明提供一种锂离子二次电池，其包括：正极; 包含负极活性物质的负极，所述负极活性物质包含选自天然石墨，人造石墨，不可石墨化碳和可石墨化碳的至少一种碳材料; 以及包含特定的环状二磺酸酯化合物和酸酐的电解质溶液。

公开(公告)号：US20150349332A1

公开(公告)日：2015-12-03

申请号：US14759677

申请日：2014-01-10

Applicant: NEC CORPORATION

Inventor： Takeshi AZAMI ,  Hitoshi ISHIKAWA

IPC: H01M4/36 ,  H01M10/0567 ,  H01M10/0525 ,  H01M4/587 ,  H01M4/58 ,  H01M4/133 ,  H01M4/136

CPC classification number: H01M4/364 ,  H01M4/0447 ,  H01M4/133 ,  H01M4/136 ,  H01M4/581 ,  H01M4/587 ,  H01M4/622 ,  H01M4/625 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/058 ,  H01M2004/027 ,  H01M2300/0025 ,  Y10T29/49112

Abstract: The present invention relates to a negative electrode for a lithium ion secondary battery, the negative electrode containing a negative electrode active material containing a first carbon and a second carbon, in which the first carbon is spherical graphite, the second carbon is massive graphite, and the sulfur concentration in the first carbon (Sx) and the sulfur concentration in the second carbon (Sy) are each independently 0 ppm or more and 300 ppm or less.

Abstract translation: 锂离子二次电池用负极技术领域本发明涉及锂离子二次电池用负极，所述负极含有含有第一碳和第二碳的负极活性物质，其中，所述第一碳为球形石墨，所述第二碳为块状石墨， 第一碳（Sx）中的硫浓度和第二碳（Sy）中的硫浓度各自独立地为0ppm以上且300ppm以下。