公开(公告)号：US20190305317A1

公开(公告)日：2019-10-03

申请号：US16339853

申请日：2016-10-06

Applicant: NEC CORPORATION

Inventor： Qian CHENG ,  Katsumi MAEDA ,  Noriyuki TAMURA

IPC: H01M4/62 ,  H01M10/0525 ,  H01M10/0568 ,  H01M4/66 ,  H01M10/0569 ,  H01M10/0567

Abstract: The object of the invention is to provide a new lithium ion battery system that can have both high energy density and fast chargeable capability. The invention provides a lithium ion battery, comprising an anode comprising an anode active material layer on an anode current collector, the anode active material layer having a mass load higher than 60 g/m2, a cathode comprising a cathode active material layer on a cathode current collector, the cathode active material layer having a mass load higher than 100 g/m2, and an electrolytic solution comprising an imide anion based lithium salt and LiPO2F2, wherein at least one of the anode and cathode active material layers comprises a spacer composed of a hard carbon.

公开(公告)号：US20190280300A1

公开(公告)日：2019-09-12

申请号：US16345490

申请日：2017-10-25

Applicant: NEC CORPORATION

Inventor： Katsumi MAEDA ,  Noriyuki TAMURA ,  Mika SHIBA

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

Abstract: An electrode for lithium ion secondary batteries, including a porous glass particle and a positive electrode active material or negative electrode active material that is capable of occluding and releasing lithium ions wherein the pore volume of the porous glass particle is from 0.1 ml/g to 2 ml/g, is used to provide a lithium ion secondary battery excellent in a charge rate property.

公开(公告)号：US20180183099A1

公开(公告)日：2018-06-28

申请号：US15324453

申请日：2015-06-11

Applicant: NEC Corporation

Inventor： Shizuka SATO ,  Katsumi MAEDA ,  Noriyuki TAMURA ,  Sadanori HATTORI

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/42 ,  H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M2/02 ,  C07F9/46 ,  C07F9/6571 ,  C07F9/6568

CPC classification number: H01M10/0567 ,  C07F9/2458 ,  C07F9/46 ,  C07F9/6568 ,  C07F9/6571 ,  C07F9/657154 ,  H01M2/02 ,  H01M2/0287 ,  H01M4/13 ,  H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/4235 ,  H01M2004/028 ,  H01M2300/0037 ,  Y02E60/122 ,  Y02T10/7011

Abstract: The present invention provides a non-aqueous electrolytic solution comprising a phosphinoamine-based compound represented by formula (1) below and a lithium ion secondary battery comprising the non-aqueous electrolytic solution. By adding the phosphinoamine-based compound to the non-aqueous electrolytic solution, oxidative degradation in the non-aqueous electrolytic solution is suppressed, and thus gas generation is suppressed.

公开(公告)号：US20180083281A1

公开(公告)日：2018-03-22

申请号：US15561379

申请日：2015-03-27

Applicant: NEC CORPORATION

Inventor： Qian CHENG ,  Noriyuki TAMURA

IPC: H01M4/587 ,  H01M4/133 ,  H01M10/0525 ,  C01B32/05

CPC classification number: H01M4/587 ,  C01B32/05 ,  C01B32/20 ,  C01B32/30 ,  C01P2002/54 ,  C01P2002/78 ,  C01P2004/03 ,  C01P2004/61 ,  C01P2004/80 ,  C01P2006/40 ,  H01M4/133 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027 ,  Y02T10/7011

Abstract: An anode material for a lithium ion secondary battery that is obtainable by a method comprising: preparing a raw material of the anode material selected from high oxygen containing carbons, heat treating the raw material at a temperature of 550° C. to 850° C. under oxidizing atmosphere to form having a multi-channel carbon material and doping boron into the multi-channel carbon material.

公开(公告)号：US20170271712A1

公开(公告)日：2017-09-21

申请号：US15517260

申请日：2015-09-17

Applicant: NEC Corporation

Inventor： Katsumi MAEDA ,  Sadanori HATTORI ,  Noriyuki TAMURA

IPC: H01M10/0525 ,  H01M4/04 ,  H01M10/0566 ,  H01M4/505 ,  H01M4/525

CPC classification number: H01M10/0525 ,  H01M4/04 ,  H01M4/366 ,  H01M4/483 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0566 ,  H01M2004/028 ,  Y02T10/7011

Abstract: A positive electrode active material for a lithium ion secondary battery that can suppress gas generation and that can provide a lithium ion secondary battery having a high capacity retention ratio in charge-discharge cycles is provided. The positive electrode active material for a lithium ion secondary battery according to the present exemplary embodiment includes a compound having a layered rock salt structure and represented by LixFesM1(z-s)M2yOδ (wherein 1.05≦x≦1.90, 0.05≦s≦0.50, 0.05≦z≦0.50, 0.33≦y≦0.90, 1.20≦δ≦3.10 and z−s≧0; M1 is at least one element selected from the group consisting of Co and Ni; and M2 is at least one element selected from the group consisting of Mn, Ti and Zr) and a specific 1,3-propanedione derivative.