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公开(公告)号：US20210210785A1
公开(公告)日：2021-07-08
申请号：US16760242
申请日：2018-10-31
Applicant: NEC CORPORATION
Inventor： Shin SERIZAWA , Suguru TAMAI , Kazuhiko INOUE
IPC: H01M10/0567 , H01M10/0525 , H01M4/62 , H01M4/38 , H01M4/583 , H01M4/36 , H01M4/525 , H01M4/04 , H01M4/66 , H01M10/0568
Abstract: Deterioration in cycle characteristics and battery swelling are improved. The lithium ion secondary battery of the present invention is characterized in comprising an electrolyte solution comprising a multifunctional monomer comprising two or more epoxy groups and a negative electrode comprising a binder comprising a polymer comprising a monomer unit comprising a functional group selected from the group consisting of —OH, —OM, —COOH, —COOM and —COOCnH2n+1, wherein M is a metal element, and n is an integer of 1 to 5.
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公开(公告)号：US20190044149A1
公开(公告)日：2019-02-07
申请号：US16076933
申请日：2017-02-09
Applicant: NEC CORPORATION
Inventor： Shin SERIZAWA
IPC: H01M4/62 , H01M10/0525 , H01M4/38 , H01M4/36
CPC classification number: H01M4/622 , H01M4/134 , H01M4/364 , H01M4/386 , H01M10/052 , H01M10/0525 , Y02E60/122 , Y02T10/7011
Abstract: An object of the present invention is to provide a binder composition for a secondary battery for achieving improved charge-discharge efficiency and good cycle characteristics at the same time. The binder composition for a secondary battery according to the present invention is characterized in comprising a polyamic acid comprising a repeating unit consisting of a skeleton based on an aromatic tetracarboxylic acid dianhydride and a skeleton based on an alicyclic diamine represented by structural formula: NH2—(CH2)n—R2—(CH2)m—NH2, wherein R2 represents alicyclic group, and n and m each independently represent the number of repeating units selected from 1 to 5; and/or a polyamic acid comprising a repeating unit consisting of a skeleton based on an alicyclic tetracarboxylic acid dianhydride and a skeleton based on an aromatic diamine.
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公开(公告)号：US20180108935A1
公开(公告)日：2018-04-19
申请号：US15569870
申请日：2016-04-26
Applicant: NEC CORPORATION
Inventor： Takehiro NOGUCHI , Shin SERIZAWA , Yuukou KATOU
IPC: H01M10/052 , H01M10/0567 , H01M10/0569 , H01M4/505 , H01M4/525
CPC classification number: H01M10/052 , H01M4/485 , H01M4/505 , H01M4/525 , H01M4/5825 , H01M10/0567 , H01M10/0568 , H01M10/0569 , H01M2004/028 , Y02P70/54 , Y02T10/7011
Abstract: The object of the present invention is to provide an electrolyte solution for secondary batteries, which improves the cycle characteristics of a secondary battery operating at a high potential and used at a high temperature for a long time. The present invention relates to an electrolyte solution for secondary batteries comprising lithium difluorophosphate, a fluorine containing ether compound and a fluorine containing phosphate ester compound and/or a sulfone compound.
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公开(公告)号：US20160133935A1
公开(公告)日：2016-05-12
申请号：US14895586
申请日：2014-06-03
Applicant: NEC CORPORATION
Inventor： Tetsuya KAJITA , Shin SERIZAWA
CPC classification number: H01M4/622 , B29B7/002 , C08G73/10 , C08L77/06 , H01M4/0404 , H01M4/0471 , H01M4/133 , H01M4/134 , H01M4/1393 , H01M4/1395 , H01M4/364 , H01M4/38 , H01M4/405 , H01M4/583 , H01M4/587 , H01M4/60 , H01M10/052 , H01M10/0525 , H01M2220/30
Abstract: The present invention relates to an electrode binder composition including a high-molecular-weight poly(amic acid) having a weight-average molecular weight of 5,000 or more and 100,000 or less and a low-molecular-weight poly(amic acid) having a weight-average molecular weight of 100 or more and 2,000 or less, and the present invention can provide an electrode binder composition that leads to a secondary battery having a high capacity superior in the initial charge/discharge efficiency and the cycle characteristics.
Abstract translation: 本发明涉及包含重均分子量为5,000以上且100,000以下的高分子量聚（酰胺酸）和低分子量聚（酰胺酸）的电极粘合剂组合物，其具有 重均分子量为100以上且2,000以下，本发明可以提供一种电极粘合剂组合物，其导致具有优异的初始充放电效率和循环特性的高容量的二次电池。
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公开(公告)号：US20200028176A1
公开(公告)日：2020-01-23
申请号：US16493917
申请日：2018-03-14
Applicant: NEC Corporation
Inventor： Shin SERIZAWA
IPC: H01M4/62 , H01M4/134 , H01M4/1395 , H01M4/04 , H01M4/38 , H01M4/525 , H01M10/0525
Abstract: A purpose of the present invention is to provide a binder composition for a secondary battery which improves the charge and discharge efficiency and the cycle characteristics of a battery. The binder composition for a secondary battery of the present invention is characterized by comprising a polyamide-imide comprising a repeating unit represented by chemical formula (1) or a precursor thereof, wherein A is a trivalent group obtained by removing carboxyl groups from a tricarboxylic acid, B is a divalent group obtained by removing amino groups from a diamine, and at least one of A and B is an aliphatic group.
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Patent Agency Ranking
公开(公告)号：US20200028175A1
公开(公告)日：2020-01-23
申请号：US16493916
申请日：2018-03-14
Applicant: NEC CORPORATION
Inventor： Shin SERIZAWA
Abstract: A purpose of the present invention is to provide a binder composition for a secondary battery which can impart excellent battery characteristics, even when the heat treatment temperature is low. The binder composition for a secondary battery according to the present invention is characterized by comprising a polyamic acid comprising a repeating unit represented by chemical formula (1) and an aromatic compound comprising an electron donating group and an organic acid group, wherein A is a tetravalent group obtained by removing acid anhydride groups from a tetracarboxylic dianhydride, B is a divalent group obtained by removing amino groups from a diamine, and at least one of A and B is an aliphatic group.
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公开(公告)号：US20180248192A1
公开(公告)日：2018-08-30
申请号：US15760477
申请日：2016-09-16
Applicant: NEC Corporation
Inventor： Shin SERIZAWA , Kazuhiko INOUE
IPC: H01M4/62 , C08G73/10 , H01M4/36 , H01M10/0525
CPC classification number: H01M4/622 , C08G73/1021 , C08G73/1042 , C08G73/1046 , C08G73/1053 , C08G73/1071 , C08G73/1082 , C08G73/14 , C08K5/09 , C08L79/08 , H01M4/13 , H01M4/366 , H01M10/0525
Abstract: An object of the present invention is to provide a polyimide binder which can be prepared under lower temperature conditions. The binder composition for a secondary battery of the present invention is characterized in comprising a polyamic acid and an aromatic compound comprising an electron donating group and an organic acid group.
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公开(公告)号：US20180212235A1
公开(公告)日：2018-07-26
申请号：US15925576
申请日：2018-03-19
Applicant: NEC Corporation
Inventor： Tetsuya KAJITA , Jiro IRIYAMA , Shin SERIZAWA
IPC: H01M4/36 , H01M4/38 , H01M2/02 , H01M4/04 , H01M4/131 , H01M4/134 , H01M10/0569 , H01M10/052 , H01M4/485 , H01M4/48 , H01M4/1395 , H01M4/1391 , H01M4/62 , H01M4/02
CPC classification number: H01M4/364 , H01M2/0202 , H01M2/0237 , H01M2/0267 , H01M4/0404 , H01M4/131 , H01M4/134 , H01M4/1391 , H01M4/1395 , H01M4/366 , H01M4/386 , H01M4/48 , H01M4/485 , H01M4/625 , H01M10/052 , H01M10/0569 , H01M2004/027 , H01M2220/20 , H01M2220/30 , H01M2300/0028
Abstract: Provided are a lithium secondary battery wherein gas generation associated with charging and discharging can be suppressed even in case where silicon and silicon oxide are contained as negative electrode active materials, and wherein deformation due to the gas generation can be suppressed even in case where a resin film is used as an outer package; and a method for manufacturing the lithium secondary battery. A lithium secondary battery comprises a negative electrode containing a negative electrode active material, a positive electrode containing a positive electrode active material, and an electrolytic solution used to immerse the negative electrode active material and the positive electrode active material, wherein the negative electrode active material contains silicon and silicon oxide that have been subjected to a reduction treatment.
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公开(公告)号：US20180076486A1
公开(公告)日：2018-03-15
申请号：US15554556
申请日：2016-03-04
Applicant: NEC CORPORATION
Inventor： Takehiro NOGUCHI , Kenichi SHIMURA , Shin SERIZAWA , Yuukou KATOU , Takuya HASEGAWA
IPC: H01M10/0569 , H01M10/052 , H01M10/058 , H01M4/505 , H01M4/525 , H01M10/0567 , H01M4/131
CPC classification number: H01M10/0569 , H01M2/16 , H01M2/162 , H01M4/131 , H01M4/505 , H01M4/525 , H01M10/052 , H01M10/0567 , H01M10/058 , H01M10/0585 , H01M2220/20 , H01M2300/0034 , H01M2300/0037 , H01M2300/004 , Y02E60/122 , Y02P70/54 , Y02T10/7011
Abstract: A lithium ion secondary battery excellent in cycle characteristics and rate characteristics is provided. The present invention relates to a lithium secondary battery having an electrolyte solution comprising one or more compounds selected from a fluorinated ether and a fluorinated phosphate ester and a separator comprising an aramid resin.
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公开(公告)号：US20200035996A1
公开(公告)日：2020-01-30
申请号：US16337646
申请日：2017-09-28
Applicant: NEC CORPORATION
Inventor： Kazuhiko INOUE , Shin SERIZAWA
Abstract: The purpose of the present invention is to provide an electrode with reduced thermal deterioration even though the electrode has an insulating layer comprising a polyimide. The present invention relates to an electrode comprising a current collector and an electrode mixture layer, wherein the electrode comprises an insulating layer comprising a polyimide and an aromatic compound having an electron donating group and an organic acid group.
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