公开(公告)号：US20170229704A1

公开(公告)日：2017-08-10

申请号：US15502123

申请日：2015-08-06

Applicant: NEC Corporation

Inventor： Makiko TAKAHASHI ,  Takehiro NOGUCHI ,  Yuukou KATOU

IPC: H01M4/131 ,  H01M4/133 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  B60L11/18 ,  H01M4/66 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0585 ,  H01M10/0569 ,  H01M10/0568 ,  C01G53/00 ,  H01M4/62

Abstract: The present invention relates to a positive electrode comprising a Mn composite oxide having a tetragonal structure represented by formula (1): Lia(MxMn2-x-yYy)(O4-wZw)(wherein 1

公开(公告)号：US20170352908A1

公开(公告)日：2017-12-07

申请号：US15521276

申请日：2015-10-21

Applicant: NEC Corporation

Inventor： Takehiro NOGUCHI ,  Yuukou KATOU ,  Makiko TAKAHASHI

IPC: H01M10/052 ,  H01M10/0569 ,  H01M4/58 ,  H01M4/48 ,  H01M4/46 ,  H01M4/42 ,  H01M4/40 ,  H01M10/058 ,  H01M4/38

CPC classification number: H01M10/052 ,  H01M4/38 ,  H01M4/386 ,  H01M4/40 ,  H01M4/42 ,  H01M4/46 ,  H01M4/48 ,  H01M4/483 ,  H01M4/485 ,  H01M4/58 ,  H01M10/04 ,  H01M10/0525 ,  H01M10/0569 ,  H01M10/058 ,  H01M2300/0034 ,  H01M2300/0037

Abstract: An object of the present invention is to provide a secondary battery having high energy density with long-term life. The present invention relates to a secondary battery comprising a negative electrode comprising a silicon-containing compound and an electrolyte solution comprising a fluorine-containing ether compound, a fluorine-containing phosphoric acid ester, a sulfone compound and a cyclic carbonate compound in a predetermined amount respectively.

公开(公告)号：US20170170520A1

公开(公告)日：2017-06-15

申请号：US15039585

申请日：2014-11-25

Applicant: NEC Corporation

Inventor： Makiko TAKAHASHI ,  Takehiro NOGUCHI

IPC: H01M10/0569 ,  H01M10/058 ,  H01M4/505 ,  H01M10/0525

CPC classification number: H01M10/0569 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/058 ,  H01M2004/028 ,  H01M2300/0034 ,  H01M2300/0037 ,  Y02T10/7011

Abstract: The present invention provides a lithium ion secondary battery having excellent high temperature cycle characteristics. The present invention relates to an electrolyte solution containing a non-aqueous electrolyte solvent containing two or more open chain sulfone compounds represented by a specific formula and one or more carbonate ester compounds represented by a specific formula; and to a secondary battery comprising these.

公开(公告)号：US20160099486A1

公开(公告)日：2016-04-07

申请号：US14889718

申请日：2014-05-09

Applicant: NEC Corporation

Inventor： Takehiro NOGUCHI ,  Yuukou KATOU ,  Hideaki SASAKI ,  Makiko TAKAHASHI ,  Emiko FUJII

IPC: H01M10/0569 ,  H01M10/04 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525

CPC classification number: H01M10/0569 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/049 ,  H01M10/052 ,  H01M10/0567 ,  H01M10/058 ,  H01M2300/0034

Abstract: The present invention relates to a secondary battery electrolyte, which contains a first fluorine-containing ether compound, a second fluorine-containing ether compound, and at least one selected from fluorine-containing phosphate ester compounds and sulfone compounds, wherein the fluorine substitution rate of the first fluorine-containing ether compound is lower than that of the second fluorine-containing ether compound, and the content of the first fluorine-containing ether compound is higher than that of the second fluorine-containing ether compound. According to the present invention, with respect to batteries operating at a high voltage, and batteries supposed to be used at a high temperature for a long period, there can be provided a lithium secondary battery suppressed in the decomposition reaction of the electrolyte and improved in the life characteristics.

Abstract translation: 本发明涉及含有第一含氟醚化合物，第二含氟醚化合物和选自含氟磷酸酯化合物和砜化合物中的至少一种的二次电池电解质，其中氟取代率 第一含氟醚化合物的含量低于第二含氟醚化合物，第一含氟醚化合物的含量比第二含氟醚化合物的含量高。 根据本发明，对于高电压工作的电池和长时间在高温下使用的电池，可以提供抑制电解质的分解反应的锂二次电池， 生活特点。

公开(公告)号：US20170162910A1

公开(公告)日：2017-06-08

申请号：US15327205

申请日：2015-07-15

Applicant: NEC Corporation

Inventor： Yuukou KATOU ,  Takehiro NOGUCHI ,  Makiko TAKAHASHI ,  Hideaki SASAKI

IPC: H01M10/0569 ,  H01M4/131 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/505

CPC classification number: H01M10/0569 ,  H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0567 ,  H01M2300/0034 ,  H01M2300/004 ,  Y02T10/7011

Abstract: The present invention relates to a nonaqueous electrolyte solution comprising a nonaqueous electrolyte solvent which comprises a fluorine-containing phosphate ester represented by a specific formula, a fluorine-containing ether represented by a specific formula, and an open-chain or cyclic acid anhydride. According to the present invention, there is provided an electrolyte solution capable of realizing a lithium secondary battery having an excellent cycle characteristics with little gas generation after charge-discharge cycles.

公开(公告)号：US20160308199A1

公开(公告)日：2016-10-20

申请号：US15101792

申请日：2014-11-05

Applicant: NEC Corporation

Inventor： Takehiro NOGUCHI ,  Makiko TAKAHASHI ,  Shin SERIZAWA

IPC: H01M4/36 ,  H01M4/525 ,  H01M4/50 ,  C01G53/00 ,  H01M4/131 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/505 ,  H01M4/52

CPC classification number: H01M4/366 ,  C01G45/1242 ,  C01G53/54 ,  C01P2002/76 ,  C01P2002/85 ,  C01P2004/84 ,  C01P2006/40 ,  H01M4/0471 ,  H01M4/131 ,  H01M4/502 ,  H01M4/505 ,  H01M4/523 ,  H01M4/525 ,  H01M10/0525

Abstract: A secondary battery having an improved life characteristics is provided by the use of a positive electrode active material for a secondary battery, comprising (a) a surface layer comprising a lithium metal composite oxide having a spinel crystal structure represented by space group Fd-3m, and (b) an internal portion comprising a lithium metal composite oxide having a spinel crystal structure represented by space group P4332.

Abstract translation: 通过使用二次电池用正极活性物质，提供具有改善的寿命特性的二次电池，其包括（a）包含具有由空间群Fd-3m表示的尖晶石晶体结构的锂金属复合氧化物的表面层， 和（b）包含具有由空间群P4332表示的尖晶石晶体结构的锂金属复合氧化物的内部部分。

公开(公告)号：US20150303521A1

公开(公告)日：2015-10-22

申请号：US14443719

申请日：2013-11-18

Applicant: NEC Corporation

Inventor： Hideaki SASAKI ,  Takehiro NOGUCHI ,  Yuukou KATOU ,  Makiko TAKAHASHI

IPC: H01M10/0569 ,  H01M10/0525

CPC classification number: H01M10/0569 ,  H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M4/622 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0567 ,  H01M2300/0034 ,  H01M2300/0042 ,  Y02T10/7011

Abstract: The present invention is a lithium ion secondary battery comprising a positive electrode and a non-aqueous electrolyte solution comprising a non-aqueous electrolyte solvent, wherein the positive electrode comprises a positive electrode active material having an operating potential at 4.5 V or higher versus lithium metal, the non-aqueous electrolyte solvent comprises a fluorinated phosphate ester represented by a predetermined formula and at least one selected from the group consisting of sulfone compounds represented by predetermined formulae, and the sulfone compound is included in an amount of 5 volume % or more in the non-aqueous electrolyte solvent.

Abstract translation: 本发明是一种锂离子二次电池，其包含正极和非水电解质溶液，该非水电解质溶液包含非水电解质溶剂，其中所述正极包括相对于锂金属具有4.5V或更高的操作电位的正极活性材料 ，非水电解质溶剂包含由规定的式表示的氟化磷酸酯和选自由规定式表示的砜化合物的至少一种，砜类化合物的含量为5体积％以上 非水电解质溶剂。