公开(公告)号：US20150311530A1

公开(公告)日：2015-10-29

申请号：US14646076

申请日：2013-11-19

Applicant: NEC CORPORATION

Inventor： Hideaki SASAKI ,  Takehiro NOGUCHI

IPC: H01M4/62 ,  H01M4/505 ,  C08L27/16 ,  H01M10/0525 ,  H01M4/04 ,  C08L27/06 ,  H01M4/1391 ,  H01M4/525

CPC classification number: H01M4/623 ,  C08L27/06 ,  C08L27/16 ,  C08L2205/02 ,  H01M4/0404 ,  H01M4/13 ,  H01M4/1391 ,  H01M4/505 ,  H01M4/525 ,  H01M4/622 ,  H01M10/0525 ,  H01M2004/028 ,  Y02T10/7011

Abstract: An electrode for a lithium ion secondary battery comprising a binder comprising a vinyl chloride resin (PVC) and a polyvinylidene fluoride (PVDF), wherein the weight ratio of the PVC and the PVDF is PVC:PVDF=8:2 to 3:7, and at least one of the following (a) and (b) is satisfied: (a) the polymerization degree of the PVC is 900 or more, and (b) the polymerization degree of the PVDF is 5000 or more.

Abstract translation: 一种锂离子二次电池用电极，其包含含有氯乙烯树脂（PVC）和聚偏二氟乙烯（PVDF）的粘合剂，其中，所述PVC与PVDF的重量比为PVC：PVDF = 8:2〜3:7， 满足以下（a）和（b）中的至少一个：（a）PVC的聚合度为900以上，（b）PVDF的聚合度为5000以上。

公开(公告)号：US20190089003A1

公开(公告)日：2019-03-21

申请号：US16082458

申请日：2017-03-03

Applicant: NEC Corporation

Inventor： Takehiro NOGUCHI ,  Shin SERIZAWA ,  Takuya HASEGAWA

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525 ,  H01M10/058

CPC classification number: H01M10/0569 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/058 ,  H01M2004/021 ,  H01M2220/20 ,  H01M2300/0034 ,  H01M2300/0037 ,  Y02E60/122 ,  Y02T10/7011

Abstract: The purpose of the present invention is to provide a lithium secondary battery which has improved service life characteristics by suppressing a decomposition reaction of the electrolyte solution in the field of batteries that operate at high voltages or are assumed to be used at high temperatures for a long period of time. The present invention relates to an electrolyte solution for a secondary, which is characterized by containing a sulfone compound, a fluorine-containing cyclic acetal compound and a cyclic carbonate in a specific composition; and a secondary battery which uses this electrolyte solution for a secondary battery.

公开(公告)号：US20190027786A1

公开(公告)日：2019-01-24

申请号：US16070046

申请日：2017-01-12

Applicant: NEC Corporation

Inventor： Takehiro NOGUCHI ,  Takuya HASEGAWA ,  Shin SERIZAWA

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M10/0567 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58

Abstract: The purpose of the present embodiment is to provide a lithium secondary battery which is assumed to be operated at a high voltage or to be used at high temperatures for a long period of time, and which has improved life characteristics by suppressing a decomposition reaction of the electrolyte solution. The present embodiment relates to an electrolyte solution for a secondary battery containing a sulfone compound, a fluorine containing ether and an acid anhydride at a specific composition, and a secondary battery which uses this electrolyte solution for a secondary battery.

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。