公开(公告)号：US20170271674A1

公开(公告)日：2017-09-21

申请号：US15506805

申请日：2014-08-29

Applicant: NEC Corporation

Inventor： Qian CHENG ,  Noriyuki TAMURA

IPC: H01M4/587 ,  H01M4/38

Abstract: The present invention provides an anode material for a lithium-ion battery comprising a carbon particle having a particle size of 5 μm to 30 μm, and including defective portions on a surface of the carbon particle, the defective portions being grooves formed by cathodically exfoliating graphene layers from the carbon particle.

公开(公告)号：US20160218360A1

公开(公告)日：2016-07-28

申请号：US14913892

申请日：2014-08-19

Applicant: NEC CORPORATION ,  TANAKA CHEMICAL CORPORATION

Inventor： Kentaro NAKAHARA ,  Ryota YUGE ,  Noriyuki TAMURA ,  Sadanori HATTORI ,  Kentaro KURATANI ,  Kyousuke DOUMAE ,  Hideka SHIBUYA ,  Mitsuharu TABUCHI

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

CPC classification number: H01M4/366 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/028 ,  Y02T10/7011

Abstract: There is provided a lithium-iron-manganese-based composite oxide capable of providing a lithium-ion secondary battery which has a high capacity retention rate in charge/discharge cycles and in which the generation of a gas caused by charge/discharge cycles is reduced. A lithium-iron-manganese-based composite oxide having a layered rock-salt structure, wherein at least a part of the surface of a lithium-iron-manganese-based composite oxide represented by the following formula (1) is coated with an inorganic material: LixM1(y-p)MnpM2(z-p)FeqO(2-δ) (1) (wherein 1.05≦x≦1.32, 0.33≦y≦0.63, 0.06≦z≦0.50, 0

Abstract translation: 提供一种锂 - 铁 - 锰基复合氧化物，其能够提供在充电/放电循环中具有高容量保持率的锂离子二次电池，并且其中由充电/放电循环引起的气体的产生减少 。 一种具有层状岩盐结构的锂 - 铁 - 锰基复合氧化物，其中由下式（1）表示的锂 - 铁 - 锰基复合氧化物的至少一部分表面被无机 材料：LixM1（yp）MnpM2（zp）FeqO（2-δ）（1）（其中1.05≤x≤1.32,0.33≤y≤0.63,0.06≤z≤0.50,0≤p≤0.63,0.06≤q≤0.50 ，0≤δ≤0.80，y≥p，z≥q; M1为选自Ti和Zr中的至少一种元素; M2为选自Co，Ni和Mn中的至少一种元素）。

公开(公告)号：US20160028119A1

公开(公告)日：2016-01-28

申请号：US14772595

申请日：2014-08-20

Applicant: SEKISUI CHEMICAL CO., LTD. ,  NEC CORPORATION

Inventor： Masaru HEISHI ,  Takuya TOYOKAWA ,  Katsumi MAEDA ,  Noriyuki TAMURA ,  Kentaro NAKAHARA

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

CPC classification number: H01M10/0567 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0569 ,  H01M2300/0025 ,  Y02T10/7011

Abstract: A lithium ion secondary battery comprising: a positive electrode comprising a positive electrode active material; a negative electrode comprised mainly of a material capable of storing and releasing lithium ions; and an electrolytic liquid, the positive electrode active material being a lithium-iron-manganese complex oxide having a layered rock salt structure and represented by a chemical formula: LixFesM1(z-s)M2yO2-δ  wherein 1.05≦x≦1.32, 0.06≦s≦0.50, 0.06≦z≦0.50, 0.33≦y≦0.63, and 0≦δ≦0.80; M1 represents a metal selected from the group consisting of Co, Ni, Mn and a mixture thereof; and M2 represents a metal selected from the group consisting of Mn, Ti, Zr and a mixture thereof, the electrolytic liquid comprising 1,1,2,3,3,3-hexafluoropropyl difluoromethyl ether represented by the following formula (1):

Abstract translation: 一种锂离子二次电池，包括：正极，包括正极活性物质; 主要由能够储存和释放锂离子的材料构成的负极; 和电解液，所​​述正极活性物质是具有层状岩盐结构并由化学式：LixFesM1（zs）M2yO2-δ表示的锂 - 铁 - 锰复合氧化物，其中1.05＆nlE; x＆nlE; 1.32,0.06和nlE; s＆nlE; 0.50,0.06＆nlE; z＆nlE; 0.50,0.33＆nlE; y＆nlE; 0.63和0＆amp; nlE;δ＆nlE; 0.80; M1表示选自Co，Ni，Mn及其混合物的金属; M2表示选自Mn，Ti，Zr及其混合物的金属，电解液包含由下式（1）表示的1,1,2,3,3,3-六氟丙基二氟甲基醚：

公开(公告)号：US20190006675A1

公开(公告)日：2019-01-03

申请号：US16069813

申请日：2016-01-13

Applicant: NEC CORPORATION ,  UNIVERSITY OF HYOGO

Inventor： Qian CHENG ,  Noriyuki TAMURA ,  Yoshiaki MATSUO

IPC: H01M4/587 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/62

Abstract: An anode material for a lithium ion battery, comprising an oxygen-containing carbon where oxygen is in the form of functional groups, the oxygen being distributed gradient from the surface to the inside of the carbon, and the carbon having an interlayer space d002 larger than 0.3357 nm; and a porous graphene layer covering the oxygen-containing carbon, the graphene being in the form of monolayer or few-layer graphene.

公开(公告)号：US20170288224A1

公开(公告)日：2017-10-05

申请号：US15506813

申请日：2014-08-29

Applicant: NEC Corporation

Inventor： Qian CHENG ,  Noriyuki TAMURA ,  Kentaro NAKAHARA

IPC: H01M4/587 ,  H01M10/0525 ,  H01M4/133 ,  H01M4/38 ,  H01M4/36 ,  H01M4/1393

CPC classification number: H01M4/587 ,  C01B32/00 ,  C01B32/182 ,  C01B2204/22 ,  C01P2004/61 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/364 ,  H01M4/38 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/027

Abstract: The present invention provides an anode material for a lithium-ion battery comprising a carbon particle having a particle size of 5 μm to 30 μm, and including defective portions on a surface of the carbon particle, the defective portions being holes or pores formed by anodic oxidation of the carbon particle.

公开(公告)号：US20160056466A1

公开(公告)日：2016-02-25

申请号：US14779254

申请日：2014-03-27

Applicant: NEC CORPORATION

Inventor： Noriyuki TAMURA ,  Qian CHENG ,  Ryota YUGE

IPC: H01M4/587 ,  H01M10/052 ,  H01M4/48 ,  H01M4/133

CPC classification number: H01M4/587 ,  H01M4/133 ,  H01M4/483 ,  H01M10/052 ,  H01M2004/027

Abstract: The present invention has an object to provide a negative electrode carbon material capable of providing a lithium secondary battery improved in the capacity characteristic, and a negative electrode for a lithium secondary battery and a lithium secondary battery using the negative electrode carbon material. The negative electrode carbon material for a lithium secondary battery according to the present invention comprises an oxidized amorphous carbon material comprising oxidized graphene layers. The oxidized amorphous carbon material can be obtained by subjecting an amorphous carbon to an oxidation treatment so that graphene layers of carbon crystallites contained in the amorphous carbon are oxidized.

Abstract translation: 本发明的目的是提供能够提供容量特性提高的锂二次电池的负极碳材料，以及使用负极碳材料的锂二次电池用负极和锂二次电池。 根据本发明的用于锂二次电池的负极碳材料包括氧化的无定形碳材料，其包含氧化石墨烯层。 氧化的无定形碳材料可以通过使无定形碳进行氧化处理，使得包含在无定形碳中的碳微晶石墨烯层被氧化而获得。

公开(公告)号：US20160006010A1

公开(公告)日：2016-01-07

申请号：US14765173

申请日：2014-01-16

Applicant: NEC CORPORATION

Inventor： Masahiro SUGURO ,  Midori SHIMURA ,  Noriyuki TAMURA ,  Kentaro NAKAHARA

IPC: H01M2/16

CPC classification number: H01M2/1673 ,  H01M2/1653 ,  H01M4/366 ,  H01M4/62 ,  H01M10/052 ,  H01M10/4235 ,  H01M2004/027

Abstract: The present invention relates to a negative electrode for a lithium secondary battery containing a lithium sulfonate represented by a general formula (I) and provides a secondary battery that is excellent in a cycle characteristic and a storage characteristic under a high temperature environment: wherein R represents an n-valent aliphatic hydrocarbon group having 1 to 30 carbon atoms, an n-valent mononuclear aromatic group or an n-valent binuclear condensed aromatic group, and n represents 1 or 2.

Abstract translation: 本发明涉及一种含有由通式（I）表示的磺酸锂的锂二次电池用负极，提供了在高温环境下的循环特性和储存特性优异的二次电池，其中R表示 n价的碳原子数1〜30的脂肪族烃基，n价的单核芳香族基团或n价的双核稠合芳香族基团，n表示1或2。

公开(公告)号：US20200350584A1

公开(公告)日：2020-11-05

申请号：US16934111

申请日：2020-07-21

Applicant: NEC CORPORATION

Inventor： Qian CHENG ,  Noriyuki TAMURA

IPC: H01M4/587 ,  C01B32/05 ,  H01M10/052 ,  C01B32/318 ,  H01M4/133 ,  H01M10/0525

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：US20200321588A1

公开(公告)日：2020-10-08

申请号：US16303997

申请日：2017-05-19

Applicant: NEC CORPORATION

Inventor： Kaoru NARITA ,  Noriyuki TAMURA ,  Sadanori HATTORI

IPC: H01M2/18 ,  H01M2/16 ,  H01M4/13

Abstract: Provided is a stacked secondary battery with which it is possible to prevent the phenomenon of gas generated by an electrode material or the like inside a cell accumulating between an electrode and a separator, and forming bubbles that cannot readily escape, and with which safety performance at high temperatures can be enhanced. A stacked secondary battery in which a positive electrode and a negative electrode are stacked with a bag-like separator interposed therebetween, wherein one of the positive electrode and the negative electrode is accommodated in the bag-like separator, the other of the positive electrode and the negative electrode is stacked on the bag-like separator accommodating said one electrode, and the bag-like separator has a uniaxial contraction characteristic at high temperatures and has a slit formed in a contraction direction along which the contraction coefficient of the bag-like separator is large.

公开(公告)号：US20190312306A1

公开(公告)日：2019-10-10

申请号：US16307657

申请日：2017-06-13

Applicant: NEC Corporation

Inventor： Noriyuki TAMURA ,  Katsumi MAEDA ,  Qian CHENG

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

Abstract: In order to provide a lithium ion secondary battery having both high energy density and an excellent charging-rate characteristic, in the lithium ion secondary battery comprising a positive electrode, a negative electrode and an electrolyte solution, the electrolyte solution comprises 0.5 mol/l or more of Li[(FSO2)2N], 0.5 mol/l or more of LiPF6, and LiPO2F2; and the negative electrode comprises graphite deposited with amorphous carbon or graphite coated with amorphous carbon and having a specific surface area of 4 m2/g or less, as a negative electrode active material.