公开(公告)号：US10177413B2

公开(公告)日：2019-01-08

申请号：US14443719

申请日：2013-11-18

Applicant: NEC Corporation

Inventor： Hideaki Sasaki ,  Takehiro Noguchi ,  Yuukou Katou ,  Makiko Takahashi

IPC: H01M10/052 ,  H01M10/0569 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0567 ,  H01M4/131 ,  H01M10/0525 ,  H01M4/62

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.

公开(公告)号：US10014555B2

公开(公告)日：2018-07-03

申请号：US14421523

申请日：2013-07-31

Applicant: NEC Corporation

Inventor： Takehiro Noguchi ,  Hideaki Sasaki ,  Makiko Takahashi ,  Yuukou Katou

IPC: H01M10/0567 ,  H01M10/0525

CPC classification number: H01M10/0567 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/052 ,  H01M10/0525 ,  H01M2220/30 ,  H01M2300/0025 ,  Y10T29/49108

Abstract: An embodiment of the present invention relates to a lithium secondary battery comprising a nonaqueous electrolytic solution comprising a phosphate compound represented by the following general formula (1): O═P(O—R1)(O—R2)(O—R3) (1), wherein R1, R2, and R3 are each alkyl group or the like or a group comprising an ether bond represented by —R4—O—R5 (R4 represents alkylene group, and R5 represents alkyl group), and at least one of R1, R2, and R3 is a group comprising an ether bond, and at least one of R1, R2, and R3 contains fluorine, and a positive electrode active material having a charge and discharge region of 4.5 V or more versus lithium.

公开(公告)号：US09847551B2

公开(公告)日：2017-12-19

申请号：US14406408

申请日：2013-06-07

Applicant: NEC Corporation

Inventor： Hideaki Sasaki ,  Takehiro Noguchi

IPC: H01M10/056 ,  H01M10/0567 ,  H01M4/505 ,  H01M10/052 ,  H01M4/58 ,  H01M10/0525 ,  H01M4/131 ,  H01M10/0569

CPC classification number: H01M10/0567 ,  H01M4/131 ,  H01M4/505 ,  H01M4/582 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0569 ,  H01M2220/20 ,  H01M2220/30 ,  H01M2300/0025 ,  H01M2300/0034 ,  Y02E60/122 ,  Y02P70/54

Abstract: An objective of the present invention is to provide an electrolyte solution effective for reducing the amount of gas generated in a charge-discharge cycle of a lithium-ion secondary battery, preferably a lithium-ion secondary battery using a 5 V-class positive electrode. The present invention relates to a non-aqueous electrolyte solution comprising at least one type of aniline derivative represented by a predetermined formula, and a non-aqueous solvent, and to a lithium-ion secondary battery using the same.

公开(公告)号：US20150108396A1

公开(公告)日：2015-04-23

申请号：US14391742

申请日：2012-10-12

Applicant: NEC Corporation

Inventor： Makiko Takahashi ,  Takehiro Noguchi ,  Hideaki Sasaki

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

CPC classification number: H01M4/131 ,  C01G53/54 ,  C01P2002/52 ,  C01P2006/12 ,  H01M4/48 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  Y02E60/122

Abstract: Provided are a positive electrode active material for a lithium ion secondary battery and a secondary battery using the same, by which high discharge energy is obtained at low cost and capacity drop with cycles can be suppressed. A positive electrode active material for a secondary battery according to the embodiment of the present invention is represented by the following formula (I): Lia(FexNiyMn2-x-y-zAz)O4  (I) wherein 0.2

Abstract translation: 提供一种用于锂离子二次电池的正极活性物质和使用该锂离子二次电池的二次电池，能够以低成本获得高放电能量并且可以抑制具有循环的容量下降。 根据本发明的实施方式的二次电池用正极活性物质由下式（I）表示：Lia（FexNiyMn2-xy-zAz）O4（I）其中0.2

公开(公告)号：US20150064554A1

公开(公告)日：2015-03-05

申请号：US14389430

申请日：2013-03-26

Applicant: NEC Corporation

Inventor： Hideaki Sasaki ,  Takehiro Noguchi

IPC: H01M4/50 ,  H01M4/583 ,  H01M10/04 ,  H01M4/62

CPC classification number: H01M4/502 ,  H01M4/0404 ,  H01M4/1391 ,  H01M4/505 ,  H01M4/583 ,  H01M4/587 ,  H01M4/622 ,  H01M4/623 ,  H01M10/04 ,  H01M10/0525 ,  Y10T29/4911

Abstract: The present invention relates to a positive electrode for lithium ion secondary batteries, the positive electrode comprising a positive electrode active material and a positive electrode binder, in which the positive electrode active material comprises lithium manganate having a spinel structure, and the positive electrode binder comprises at least polyvinylidene fluoride (PVDF) and a resin having sulfone linkages, and to a lithium ion secondary battery comprising the positive electrode for lithium ion secondary batteries.

Abstract translation: 本发明涉及锂离子二次电池用正极，所述正极含有正极活性物质和正极粘合剂，其中所述正极活性物质包含具有尖晶石结构的锰酸锂，所述正极粘合剂包含 至少聚偏二氟乙烯（PVDF）和具有砜键的树脂，以及包含锂离子二次电池用正极的锂离子二次电池。

公开(公告)号：US20140356706A1

公开(公告)日：2014-12-04

申请号：US14365806

申请日：2012-11-21

Applicant: NEC Corporation

Inventor： Hideaki Sasaki ,  Kazuhiko Inoue ,  Takehiro Noguchi

IPC: H01M4/587 ,  H01M4/04 ,  H01M4/62

CPC classification number: H01M4/587 ,  H01M4/0404 ,  H01M4/0416 ,  H01M4/0471 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/505 ,  H01M4/525 ,  H01M4/621 ,  H01M4/623 ,  H01M10/0525 ,  H01M2220/20 ,  H01M2220/30 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011

Abstract: There is provided a negative electrode for a secondary battery that can provide a secondary battery having high charge and discharge efficiency, and a high capacity retention rate in charge and discharge cycles. A negative electrode for a secondary battery according to this exemplary embodiment contains scale-like graphite, a fluorine-based resin, and an imide-based resin. A method for manufacturing a negative electrode for a secondary battery according to this exemplary embodiment includes applying a negative electrode slurry containing scale-like graphite, a fluorine-based resin, an imide-based resin, and a solvent for dissolving the fluorine-based resin and the imide-based resin to a negative electrode current collector; and heat-treating the negative electrode current collector at a temperature of 100° C. or more and 150° C. or less.

Abstract translation: 提供一种二次电池用负极，其能够提供充放电效率高的二次电池以及充放电循环中的高容量保持率。 本实施方式的二次电池用负极包含鳞状石墨，氟系树脂和酰亚胺系树脂。 本实施方式的二次电池用负极的制造方法包括：涂布含有鳞状石墨，氟系树脂，酰亚胺系树脂和溶剂的氟系树脂的负极浆料 和酰亚胺基树脂组成负极集电体; 在100℃以上且150℃以下的温度下对负极集电体进行热处理。

公开(公告)号：US10381686B2

公开(公告)日：2019-08-13

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 ,  H01M10/0567 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M10/052 ,  H01M4/131

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：US10243234B2

公开(公告)日：2019-03-26

申请号：US15521276

申请日：2015-10-21

Applicant: NEC Corporation

Inventor： Takehiro Noguchi ,  Yuukou Katou ,  Makiko Takahashi

IPC: H01M10/0525 ,  H01M10/0569 ,  H01M4/38 ,  H01M4/40 ,  H01M10/052 ,  H01M4/42 ,  H01M4/46 ,  H01M4/48 ,  H01M4/58 ,  H01M10/058 ,  H01M4/485 ,  H01M10/04

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：US09935337B2

公开(公告)日：2018-04-03

申请号：US14414985

申请日：2013-07-01

Applicant: NEC Corporation

Inventor： Makiko Takahashi ,  Takehiro Noguchi ,  Hideaki Sasaki ,  Yuukou Katou

IPC: H01M10/0567 ,  H01M10/0569 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M4/58 ,  H01M4/02

CPC classification number: H01M10/0569 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/052 ,  H01M10/0567 ,  H01M2004/028 ,  H01M2300/0025 ,  H01M2300/0034 ,  H01M2300/0037 ,  H01M2300/004 ,  H01M2300/0042

Abstract: The present invention relates to a lithium secondary battery, comprising a positive electrode; a negative electrode; and a non-aqueous electrolyte solution, wherein the non-aqueous electrolyte solution contains a phosphate polymer represented by the following formula (1): wherein R1 to R5 each independently represents aliphatic hydrocarbon group or fluorinated aliphatic hydrocarbon group, wherein the group may have a substituent, and n represents an integer of 1 or more, with the proviso that when n is 2 or more, two or more R1(s) may be the same as, or different from each other and two or more R4(s) may be the same as, or different from each other; and a fluorinated phosphate represented by the following formula (2): wherein R6 to R8 each independently represents aliphatic hydrocarbon group or fluorinated aliphatic hydrocarbon group, wherein the group may have a substituent, with the proviso that at least one of R6 to R8 is fluorinated aliphatic hydrocarbon group.

公开(公告)号：US20170222270A1

公开(公告)日：2017-08-03

申请号：US15493049

申请日：2017-04-20

Applicant: NEC Corporation

Inventor： Makiko UEHARA ,  Takehiro Noguchi

IPC: H01M10/0569 ,  H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M2/16

CPC classification number: H01M10/0569 ,  H01M2/1613 ,  H01M2/1626 ,  H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/0525 ,  H01M2300/0034 ,  H01M2300/0037 ,  Y02E60/122 ,  Y02T10/7011

Abstract: It is an object of this exemplary embodiment to provide a lithium ion secondary battery using a positive electrode active material having an operating potential of 4.5 V or more, the lithium ion secondary battery having excellent high temperature cycle characteristics. This exemplary embodiment is a lithium ion secondary battery comprising a positive electrode and a negative electrode capable of intercalating and deintercalating lithium, a separator between the positive electrode and the negative electrode, and an electrolytic solution containing a nonaqueous electrolytic solvent, wherein the positive electrode comprises a positive electrode active material operating at a potential of 4.5 V or more versus lithium, the separator comprises cellulose, a cellulose derivative, or a glass fiber, and the nonaqueous electrolytic solvent comprises a fluorinated solvent.