公开(公告)号：US10333174B2

公开(公告)日：2019-06-25

申请号：US15560639

申请日：2016-03-22

申请人： NEC CORPORATION

发明人： Daisuke Kawasaki ,  Kenichi Shimura ,  Noboru Yoshida ,  Kazuhiko Inoue ,  Jiro Iriyama

IPC分类号： H01M10/0525 ,  H01M10/0585 ,  H01M4/04 ,  H01M2/16 ,  H01M4/505 ,  H01M4/525 ,  H01M4/131 ,  H01M4/485 ,  H01M10/04 ,  H01M10/0569 ,  H01M4/02

摘要： The present invention relates to a lithium ion secondary battery comprising a positive electrode having a coating amount per unit area of 50 mg/cm2 or more and an electrode density of 3.3 g/cc or more and a negative electrode having a coating amount per unit area of 24 mg/cm2 or more and an electrode density of 1.5 g/cc or more, a separator having a shrinking ratio of 2% or less by heat treatment at 80° C. for 6 hours, and an electrolyte solution comprising at least one sulfonic acid ester compound, and a ratio of a sulfur content in the central portion (As) and a sulfur content in the edge portion (Bs) of the positive electrode and the negative electrode, in each, is 0.7≤As/Bs≤1.1.

公开(公告)号：US09893350B2

公开(公告)日：2018-02-13

申请号：US14772341

申请日：2014-03-04

申请人： NEC Corporation

发明人： Jiro Iriyama

IPC分类号： H01M4/38 ,  H01M10/052 ,  H01M10/0567 ,  H01M4/13 ,  H01M4/36 ,  H01M4/58 ,  H01M4/62 ,  H01M10/058 ,  H01M4/02

CPC分类号： H01M4/38 ,  H01M4/13 ,  H01M4/366 ,  H01M4/5815 ,  H01M4/62 ,  H01M10/052 ,  H01M10/0567 ,  H01M10/058 ,  H01M2004/028 ,  H01M2300/0025

摘要： The present invention relates to a lithium secondary battery, wherein a peak at 167 to 171 eV and a peak at 162 to 166 eV are present in XPS analysis of sulfur (S2p) of a positive electrode surface, and P169/P164 is in the range of 0.7 to 2.0 wherein the P 169/P 164 is the ratio between the intensity of the peak at 167 to 171 eV (P169) and the intensity of the peak at 162 to 166 eV (P164). The present invention can provide a lithium secondary battery having excellent cycle characteristics.

公开(公告)号：US09831526B2

公开(公告)日：2017-11-28

申请号：US14439743

申请日：2013-10-29

申请人： NEC Corporation

发明人： Jiro Iriyama

IPC分类号： H01M10/0567 ,  H01M10/04 ,  H01M10/052 ,  H01M10/44 ,  H01M4/36 ,  H01M4/583 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/04 ,  H01M4/587 ,  H01M10/058 ,  H01M10/0525 ,  H01M4/02

CPC分类号： H01M10/0567 ,  H01M4/0445 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/366 ,  H01M4/583 ,  H01M4/587 ,  H01M10/04 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/058 ,  H01M10/446 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2300/0025

摘要： The present invention provides a lithium secondary battery, wherein a peak at 167 to 171 eV and a peak at 160 to 164 eV are present in XPS analysis of sulfur on a negative electrode surface (S2p), and P169/P162 is in the range of 0.7 to 2.0 wherein the P169/P162 is the ratio between the intensity of the peak at 167 to 171 eV (P169) and the intensity of the peak at 160 to 164 eV (P162).

公开(公告)号：US10833364B2

公开(公告)日：2020-11-10

申请号：US15572568

申请日：2016-05-09

申请人： NEC CORPORATION

发明人： Jiro Iriyama ,  Kenichi Shimura ,  Kazuhiko Inoue

IPC分类号： H01M2/16 ,  H01M10/0567 ,  H01M4/525 ,  H01M4/131 ,  H01M10/058 ,  H01M10/0525

摘要： Lithium ion secondary batteries are disclosed that include a positive electrode comprising a lithium nickel composite oxide as a positive electrode active material and a separator consisting of one or more layers selected from polyimide layer, polyamide layer, the battery having a low self-discharge failure rate even after long term storage. The lithium ion secondary batteries can include a positive electrode comprising a lithium nickel composite oxide and a separator consisting of one or more layers selected from polyimide layer, polyamide layer, and polyamide imide layer, wherein the battery comprises an acid and/or an acid anhydride in an electrolyte solution and/or a member in contact with the electrolyte solution.

公开(公告)号：US20150037671A1

公开(公告)日：2015-02-05

申请号：US14378510

申请日：2012-10-16

申请人： NEC Corporation

发明人： Jiro Iriyama ,  Tetsuya Kajita

IPC分类号： H01M4/62 ,  H01M4/04 ,  H01M10/058 ,  H01M10/052

CPC分类号： H01M4/622 ,  H01M4/0471 ,  H01M4/13 ,  H01M4/134 ,  H01M4/139 ,  H01M4/1395 ,  H01M4/386 ,  H01M4/387 ,  H01M4/661 ,  H01M4/667 ,  H01M10/052 ,  H01M10/058 ,  Y10T29/49108

摘要： It is an object of the exemplary embodiment of the present invention to provide a method for manufacturing a negative electrode for a lithium secondary battery by which conductive metal particles can be uniformly and easily formed in a conductive intermediate layer. The exemplary embodiment of the present invention is a method for manufacturing a negative electrode for a lithium secondary battery comprising a current collector comprising a metal, an active material layer comprising an active material and a binding agent, and a conductive intermediate layer comprising conductive metal particles between the current collector and the active material layer, comprising steps of (1) placing a polyamic acid on the current collector; (2) causing the metal to move from the current collector into the polyamic acid by generating migration phenomenon; and (3) heating and curing the polyamic acid, in this order, wherein the metal that has moved into the polyamic acid forms the conductive metal particles.

摘要翻译： 本发明的示例性实施例的目的是提供一种用于制造锂二次电池的负极的方法，其中导电金属颗粒可以均匀且容易地形成在导电中间层中。 本发明的示例性实施例是一种用于制造锂二次电池用负极的方法，其包括集电体，其包括金属，包含活性材料的活性材料层和粘合剂，以及包含导电金属颗粒的导电中间层 在集电体和活性物质层之间，包括以下步骤：（1）将聚酰胺酸放置在集电体上; （2）通过产生迁移现象使金属从集电体移动到聚酰胺酸中; 和（3）依次加热和固化聚酰胺酸，其中已经移入聚酰胺酸的金属形成导电金属颗粒。

公开(公告)号：US09859589B2

公开(公告)日：2018-01-02

申请号：US15103402

申请日：2014-08-08

申请人： NEC Corporation

发明人： Jiro Iriyama ,  Makihiro Otohata ,  Kazuaki Matsumoto ,  Ikiko Shimanuki

IPC分类号： H01M10/052 ,  H01M10/0585 ,  H01M10/0569 ,  H01M10/058 ,  H01M10/05 ,  H01M2/12 ,  H01M2/36 ,  H01M10/44

CPC分类号： H01M10/0585 ,  H01M2/12 ,  H01M2/36 ,  H01M2/361 ,  H01M2/362 ,  H01M2/365 ,  H01M10/05 ,  H01M10/0569 ,  H01M10/058 ,  H01M10/446

摘要： It is an object of the present invention to provide a method for producing a secondary battery in which water in the outer package can be removed even when the secondary battery includes an electrolytic solution containing a halogen-containing compound. The present exemplary embodiment is a method for producing a secondary battery including an electrolytic solution containing a supporting salt, a nonaqueous solvent, and a halogen-containing compound, an electrode assembly including a negative electrode and a positive electrode, and an outer package, the method including (1) disposing a first solution containing at least the supporting salt and the nonaqueous solvent, and the electrode assembly in the outer package; (2) charging the electrode assembly; (3) emitting from the outer package a gas generated by the charge; and (4) injecting a second solution including at least the halogen-containing compound into the outer package after the gas is emitted, wherein the first solution does not contain the halogen-containing compound, and the electrolytic solution includes the first solution and the second solution.

公开(公告)号：US20150072220A1

公开(公告)日：2015-03-12

申请号：US14389011

申请日：2013-03-22

申请人： NEC CORPORATION

发明人： Tetsuya Kajita ,  Jiro Iriyama ,  Shin Serizawa

IPC分类号： H01M4/36 ,  H01M4/38 ,  H01M4/48 ,  H01M4/134 ,  H01M4/04 ,  H01M10/052 ,  H01M10/0569 ,  H01M4/1391 ,  H01M4/1395 ,  H01M2/02 ,  H01M4/131

CPC分类号： 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

摘要： 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.

摘要翻译： 提供一种锂二次电池，即使在含有硅和氧化硅作为负极活性物质的情况下也能够抑制与充放电相关的气体发生，并且即使在树脂 胶片用作外包装; 以及锂二次电池的制造方法。 锂二次电池包括含有负极活性物质的负极，含有正极活性物质的正极和用于浸渍负极活性物质和正极活性物质的电解液，其中负极活性物质 含有经过还原处理的硅和氧化硅。

公开(公告)号：US09985286B2

公开(公告)日：2018-05-29

申请号：US14442141

申请日：2013-10-28

申请人： NEC Corporation

发明人： Jiro Iriyama ,  Daisuke Kawasaki ,  Emiko Fujii ,  Shin Serizawa ,  Hiroo Takahashi

IPC分类号： H01M4/485 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/1391 ,  H01M4/02

CPC分类号： H01M4/485 ,  H01M4/0445 ,  H01M4/0459 ,  H01M4/1391 ,  H01M10/0525 ,  H01M2004/027

摘要： A negative electrode active material comprising silicon oxide satisfying the following Equation 1 and Equation 2 when solid state NMR (29Si-DDMAS) of silicon is measured for the silicon oxide after performing charging at least once is excellent in the performance as a negative electrode active material for a lithium secondary battery; 0.42≤S1/(S1+S2+S3)≤0.55  (Equation 1) 0.21≤S3/(S1+S2+S3)≤0.26,  (Equation 2) in which S1 is a sum of peak areas of a group of signals assigned to Si having a Si—Si bond and having peaks at 0 to −15 ppm, −55 ppm, −84 ppm and −88 ppm, S2 is a sum of peak areas of a group of signals assigned to Si having a Si(OH)4-n(OSi)n (n=3, 4) structure and having peaks at −100 ppm and −120 ppm, and S3 is a sum of peak areas of a group of signals assigned to Si having a Si(OLi)4-n(OSi)n (n=0, 1, 2, 3) structure and having peaks at −66 ppm, −74 ppm, −85 ppm and −96 ppm.