公开(公告)号：US20170149097A1

公开(公告)日：2017-05-25

申请号：US15319345

申请日：2015-06-16

Applicant: NEC Corporation

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

IPC: H01M10/42 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/525 ,  H01M10/0569 ,  H01M10/0567 ,  H01M10/0568 ,  H01M4/505

CPC classification number: H01M10/4235 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2300/0037 ,  Y02T10/7011

Abstract: The present invention relates to an electrolytic solution comprising a cyclic dicarboxylic acid ester represented by the specific formula, and the secondary battery comprising the same. According to the present invention, the electrolytic solution comprising an additive which can improve a characteristics in a secondary battery and a secondary battery comprising the same can be provided.

公开(公告)号：US20180013169A1

公开(公告)日：2018-01-11

申请号：US15534241

申请日：2015-12-08

Applicant: NEC Corporation

Inventor： Daisuke KAWASAKI ,  Kenichi SHIMURA ,  Hitoshi ISHIKAWA

IPC: H01M10/0525 ,  H01M2/16 ,  H01M4/587 ,  H01M4/525 ,  H01M4/02

CPC classification number: H01M10/0525 ,  H01M2/16 ,  H01M2/162 ,  H01M4/13 ,  H01M4/364 ,  H01M4/483 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M2004/028 ,  H01M2220/20 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011

Abstract: A secondary battery in which heat resistance is excellent and the formation of lithium dendrite is suppressed is provided. The present invention relates to a secondary battery comprising an electrode element comprising a positive electrode, a negative electrode and a separator, wherein the negative electrode comprises a carbon material (a) capable of absorbing and desorbing lithium ions and an oxide (b) capable of absorbing and desorbing lithium ions, and the separator comprises 50% by mass or more of a non-woven fabric having a thermal melting or thermal decomposition temperature of 160° C. or more.

公开(公告)号：US20170141440A1

公开(公告)日：2017-05-18

申请号：US15319341

申请日：2015-06-16

Applicant: NEC Corporation

Inventor： Ikiko SHIMANUKI ,  Hitoshi ISHIKAWA ,  Noboru YOSHIDA

IPC: H01M10/42 ,  H01M10/0568 ,  H01M10/0567 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/0569 ,  H01M4/587

CPC classification number: H01M10/4235 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2300/0037 ,  Y02T10/7011

Abstract: The present invention relates to an electrolytic solution comprising a cyclic disulfonic acid ester represented by the specific formula and a cyclic dicarboxylic acid ester represented by the specific formula, and the secondary battery using the same. According to the present invention, the electrolytic solution which can improve a cycle characteristics in a secondary battery and a secondary battery using the same can be provided.

公开(公告)号：US20210151749A1

公开(公告)日：2021-05-20

申请号：US16611927

申请日：2018-05-17

Applicant: NEC CORPORATION

Inventor： Suguru TAMAI ,  Hitoshi ISHIKAWA

IPC: H01M4/38 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/44 ,  H01M10/058

Abstract: A purpose of one embodiment of the present invention is to provide a lithium ion secondary battery which has improved cycle characteristics and comprises a Si material in the negative electrode. The lithium ion secondary battery according to the present invention comprises a negative electrode comprising a negative electrode active material, a positive electrode comprising a positive electrode active material and an electrolyte solution, wherein the negative electrode active material comprises a Si material, and a ratio (Ia/Ib) of a peak intensity (Ia) at 290 eV to a peak intensity (Ib) at 285 eV is 0.7 or more in a C1s spectrum obtained by surface analysis of the negative electrode by X-ray photoelectron spectroscopy.

公开(公告)号：US20190173123A1

公开(公告)日：2019-06-06

申请号：US16095850

申请日：2017-05-23

Applicant: NEC CORPORATION

Inventor： Ikiko SHIMANUKI ,  Daisuke KAWASAKI ,  Hitoshi ISHIKAWA ,  Suguru TAMAI

IPC: H01M10/0525 ,  H01M4/38 ,  H01M10/0567 ,  B60L50/64

Abstract: A lithium ion secondary battery having high energy density and excellent cycle characteristics is provided. The present invention relates to a lithium ion secondary battery comprising a negative electrode comprising a negative electrode active material comprising more than 25% by weight of a silicon alloy and a non-aqueous electrolyte solution comprising more than 10% by weight of a compound represented by LiN(SO2CnF2n+1)2 (wherein n is an integer of 0 or more) and 10% by weight or more of fluoroethylene carbonate (FEC).

公开(公告)号：US20180358610A1

公开(公告)日：2018-12-13

申请号：US15779660

申请日：2016-11-29

Applicant: NEC Corporation

Inventor： Ikiko SHIMANUKI ,  Suguru TAMAI ,  Daisuke KAWASAKI ,  Hitoshi ISHIKAWA

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/48 ,  H01M10/0567 ,  H01M4/62 ,  H01M10/058

Abstract: When the particle size of a silicon material used for a negative electrode active material are small, a large surface area thereof easily causes a side reaction between the active material and an electrolyte solvent to occur, and the cycle characteristics of a lithium ion secondary battery decrease. In order to improve the cycle characteristics, a lithium ion secondary battery according to the present invention is characterized in comprising a negative electrode comprising a material comprising silicon as a constituent element and a polyacrylic acid, and an electrolyte solution comprising a fluoroethylene carbonate, wherein the 50% particle size of the material comprising silicon as a constituent element is 2 μm or less.

公开(公告)号：US20150318577A1

公开(公告)日：2015-11-05

申请号：US14649026

申请日：2013-11-28

Applicant: NEC CORPORATION

Inventor： Shinsaku SAITHO ,  Hitoshi ISHIKAWA ,  Kazuhiko INOUE

IPC: H01M10/0569 ,  H01M10/04 ,  H01M10/0525

CPC classification number: H01M10/0569 ,  H01M10/049 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0567 ,  H01M2300/0034 ,  H01M2300/0037 ,  Y02T10/7011 ,  Y10T29/49112

Abstract: The present invention relates to an electrolyte solution for a lithium secondary battery, which contains a sulfonate compound represented by a specific formula and carboxylic anhydride having one or more C═C double bonds, and a lithium secondary battery using the same.

Abstract translation: 本发明涉及一种锂二次电池用电解质溶液，其包含由特定式表示的磺酸盐化合物和具有一个或多个C = C双键的羧酸酐和使用该二次电池的锂二次电池。

公开(公告)号：US20170229736A1

公开(公告)日：2017-08-10

申请号：US15502027

申请日：2015-08-04

Applicant: NEC Corporation

Inventor： Ikiko SHIMANUKI ,  Hitoshi ISHIKAWA ,  Noboru YOSHIDA ,  Daisuke KAWASAKI

IPC: H01M10/0567 ,  H01M4/587 ,  H01M10/0569 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0585

CPC classification number: H01M10/0567 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0569 ,  H01M10/058 ,  H01M10/0585 ,  H01M10/446 ,  H01M2004/021 ,  H01M2220/20 ,  H01M2300/0037 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011

Abstract: The present invention relates to a lithium secondary battery having a positive electrode comprising a positive electrode active material capable of absorbing and releasing lithium ions, a negative electrode comprising a negative electrode active material capable of absorbing and releasing lithium ions, and an electrolyte solution, wherein a positive electrode surface detection component comprises at least one negative secondary ion peak selected from CH3S2O6− and CHS2O4−, and further comprises a negative secondary ion peak of SO3—, wherein the positive electrode surface detection component is detected when a primary ion is irradiated on the surface of the positive electrode active material by a Time-of-Flight Secondary Ion Mass Spectrometry (TOF-SIMS) method. According to the present invention, it is possible to provide a lithium secondary battery having excellent cycle characteristics.

公开(公告)号：US20160226098A1

公开(公告)日：2016-08-04

申请号：US15021664

申请日：2014-07-11

Applicant: NEC CORPORATION

Inventor： Noboru YOSHIDA ,  Shinsaku SAITHO ,  Kazuaki MATSUMOTO ,  Ikiko SHIMANUKI ,  Daisuke KAWASAKI ,  Yuukou KATOU ,  Hitoshi ISHIKAWA

IPC: H01M10/0567 ,  H01M4/133 ,  H01M4/62 ,  H01M4/131 ,  H01M4/525 ,  H01M10/0568 ,  H01M4/587 ,  H01M4/36 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/0569

CPC classification number: H01M10/0567 ,  H01M4/131 ,  H01M4/133 ,  H01M4/364 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M4/62 ,  H01M4/622 ,  H01M4/623 ,  H01M4/625 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/4235 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2300/0037 ,  Y02T10/7011

Abstract: It is an object of the present invention to provide an electrolytic solution capable of suppressing gas generation. The present exemplary embodiment is an electrolytic solution comprising a supporting salt, a nonaqueous solvent that dissolves the supporting salt, a cyclic sulfonic acid ester compound represented by predetermined formula (1), and an acid anhydride. According to the exemplary embodiment, an electrolytic solution capable of suppressing gas generation can be provided.

Abstract translation: 本发明的目的是提供一种能够抑制气体产生的电解液。 本示例性实施方案是包含支持盐，溶解负载盐的非水溶剂，由式（1）表示的环状磺酸酯化合物和酸酐的电解液。 根据本实施方式，可以提供能够抑制气体产生的电解液。

公开(公告)号：US20160028118A1

公开(公告)日：2016-01-28

申请号：US14771763

申请日：2014-02-28

Applicant: NEC CORPORATION

Inventor： Ikiko SHIMANUKI ,  Hitoshi ISHIKAWA ,  Daisuke KAWASAKI

IPC: H01M10/0567 ,  H01M10/0568 ,  H01M4/587 ,  H01M10/052 ,  H01M4/485 ,  H01M4/38 ,  H01M10/0569 ,  H01M2/02

CPC classification number: H01M10/0567 ,  H01M2/02 ,  H01M4/382 ,  H01M4/485 ,  H01M4/587 ,  H01M10/052 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/20 ,  H01M2300/0025 ,  H01M2300/0028 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011

Abstract: Disclosed is an electrolyte solution for lithium secondary batteries, including a cyclic sulfonic acid ester represented by the general formula (1): wherein, in the general formula (1), R1 and R2 each independently represent a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, halogen or an amino group with the proviso that R1 and R2 do not represent hydrogen atoms at the same time; and R3 represents methylene which may be substituted with fluorine. Batteries using this electrolyte solution are excellent in battery properties and storage characteristics.

Abstract translation: 公开了一种锂二次电池用电解液，其包含通式（1）表示的环状磺酸酯：其中，在通式（1）中，R 1和R 2各自独立地表示氢原子，具有1个 至5个碳原子，卤素或氨基，条件是R1和R2不同时代表氢原子; 并且R 3表示可被氟取代的亚甲基。 使用这种电解质溶液的电池具有优异的电池性能和储存特性。