公开(公告)号：DE69737527T2

公开(公告)日：2008-01-03

申请号：DE69737527

申请日：1997-11-25

Applicant: KAO CORP

Inventor： NAKANISHI KUNIYUKI ,  ISSHIKI NOBUYUKI ,  SUZUKI JUN-KAO ,  KAJIURA YOSHIO

IPC: B82Y99/00 ,  C01B31/04 ,  C04B35/52 ,  H01M4/36 ,  H01M4/587 ,  H01M10/05

Abstract: A negative electrode material for a nonaqueous secondary battery having a large discharging capacity and a small change in electric potential at the time of charge and discharge. A carbonaceous material in which a Raman intensity of 1580 cm /a Raman intensity of 1360 cm in Raman spectroscopy, that is, an R-value (degree of graphitization) is 4.0 or less, and in which the size (Lc) of a crystal lattice in the direction of C-axis measured by a wide-angle X-ray diffraction method is 25-35 nm, is provided by burning a material which can be carbonized by heat treatment, for example, in the presence of boron nitride and silicon.

公开(公告)号：DE69737527D1

公开(公告)日：2007-05-10

申请号：DE69737527

申请日：1997-11-25

Applicant: KAO CORP

Inventor： NAKANISHI KUNIYUKI ,  ISSHIKI NOBUYUKI ,  SUZUKI JUN-KAO ,  KAJIURA YOSHIO

IPC: B82Y99/00 ,  C01B31/04 ,  C04B35/52 ,  H01M4/36 ,  H01M4/587 ,  H01M10/05

Abstract: A negative electrode material for a nonaqueous secondary battery having a large discharging capacity and a small change in electric potential at the time of charge and discharge. A carbonaceous material in which a Raman intensity of 1580 cm /a Raman intensity of 1360 cm in Raman spectroscopy, that is, an R-value (degree of graphitization) is 4.0 or less, and in which the size (Lc) of a crystal lattice in the direction of C-axis measured by a wide-angle X-ray diffraction method is 25-35 nm, is provided by burning a material which can be carbonized by heat treatment, for example, in the presence of boron nitride and silicon.

公开(公告)号：EP0903795A4

公开(公告)日：2005-03-16

申请号：EP97912549

申请日：1997-11-25

Applicant: KAO CORP

Inventor： NAKANISHI KUNIYUKI ,  ISSHIKI NOBUYUKI ,  SUZUKI JUN-KAO ,  KAJIURA YOSHIO

IPC: B82Y99/00 ,  C01B31/04 ,  H01M4/36 ,  H01M4/587 ,  H01M10/05 ,  H01M4/58 ,  C04B35/52

CPC classification number: H01M4/583 ,  C01B32/20 ,  C01P2002/78 ,  C01P2002/82 ,  H01M10/0525

Abstract: A negative electrode material for a nonaqueous secondary battery having a large discharging capacity and a small change in electric potential at the time of charge and discharge. A carbonaceous material in which a Raman intensity of 1580 cm-1/a Raman intensity of 1360 cm-1 in Raman spectroscopy, that is, an R-value (degree of graphitization) is 4.0 or less, and in which the size (Lc) of a crystal lattice in the direction of C-axis measured by a wide-angle X-ray diffraction method is 25-35 nm, is provided by burning a material which can be carbonized by heat treatment, for example, in the presence of boron nitride and silicon.

公开(公告)号：EP0896374A4

公开(公告)日：2002-07-31

申请号：EP97949168

申请日：1997-12-19

Applicant: KAO CORP

Inventor： KAJIURA YOSHIO ,  KUSAKABE TETSUYA ,  ISSHIKI NOBUYUKI

IPC: C04B35/01 ,  C04B38/00 ,  H01M4/02 ,  H01M4/04 ,  H01M4/13 ,  H01M4/131 ,  H01M4/133 ,  H01M4/139 ,  H01M4/1391 ,  H01M4/36 ,  H01M4/52 ,  H01M4/525 ,  H01M4/58 ,  H01M4/587 ,  H01M4/62 ,  H01M6/40 ,  H01M10/05 ,  H01M10/0525 ,  H01M10/0585 ,  H01M10/36 ,  C04B35/00 ,  C04B35/52 ,  C04B35/56 ,  C04B38/06 ,  H01M4/48 ,  H01M4/50 ,  H01M10/40

CPC classification number: H01M4/622 ,  C04B35/01 ,  C04B38/0051 ,  C04B38/0054 ,  C04B2111/00853 ,  H01M4/02 ,  H01M4/04 ,  H01M4/0404 ,  H01M4/0416 ,  H01M4/0433 ,  H01M4/0435 ,  H01M4/0471 ,  H01M4/13 ,  H01M4/131 ,  H01M4/133 ,  H01M4/139 ,  H01M4/505 ,  H01M4/525 ,  H01M4/583 ,  H01M4/587 ,  H01M4/62 ,  H01M6/40 ,  H01M10/0525 ,  C04B35/00 ,  C04B38/0074

Abstract: By using a porous material formed by calcining an active material as an electrode of a non-aqueous solvent secondary battery, the volume of a dead space in the electrode contained in a container of the constituted battery is reduced, thereby to increase an electric capacity per unit volume. By using the porous material as the electrode material, rather a powder material, the active material is sufficiently brought into contact with an electrolyte solution, electrically. Furthermore, the amount of a metal foil as a current collecting material and a conductive material are reduced or use of them is made unnecessary, and an electric capacity per unit weight is increased in comparison with the prior art. When the porous sintered material has a plate-like shape, the thickness is from 100 mu m to 2 mm. The porous sintered material contains pores of an average diameter of 0.1 to 100 mu m in the proportion of 15 to 60% based on the total volume, and an average wall thickness between the pores is not more than 40 mu m.

Abstract translation: 通过使用通过煅烧活性材料形成的多孔材料作为非水溶剂二次电池的电极，包含在构成的电池的容器中的电极中的死空间的体积减小，从而增加每个 单位体积。 通过使用多孔材料作为电极材料，而是粉末材料，活性材料被充分地与电解质溶液接触。 此外，与现有技术相比，减少了作为集电材料的金属箔和导电材料的量，或者使用它们的使用量，并且每单位重量的电容量增加。 当多孔烧结材料具有板状形状时，其厚度为100μm至2mm。 多孔烧结体的总体积为15〜60％，平均直径为0.1〜100μm的孔，孔之间的平均壁厚为40μm以下。

公开(公告)号：EP1113511A4

公开(公告)日：2007-08-08

申请号：EP00902113

申请日：2000-02-07

Applicant: KAO CORP

Inventor： KAJIURA YOSHIO ,  SUZUKI ATSUSHI ,  ISSHIKI NOBUYUKI

IPC: H01M10/05 ,  H01M4/1391 ,  H01M10/04 ,  H01M4/02 ,  H01M4/04

CPC classification number: H01M4/131 ,  H01M4/0402 ,  H01M4/0404 ,  H01M4/043 ,  H01M4/0471 ,  H01M4/1391 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0413 ,  H01M10/045 ,  H01M10/052 ,  H01M10/0583 ,  H01M2004/021 ,  H01M2004/028 ,  Y10T29/49108 ,  Y10T29/49114

Abstract: A lithium secondary cell comprising an anode and cathode containing an active material capable of absorbing and releasing lithium ions, wherein the anode is a porous sintered body made of a lithium transition metal oxide, the porosity is 15 to 60%, and the conductivity is more than 0.1 mS/cm. Since the material is sufficiently sintered so that the conductivity may be more than 0.1 mS/cm, the bonding power of the primary particles of the sintered body is strong, and therefore the primary particles do not come off and the electrodes do not collapse even if the sintered body expands or shrinks because of the charging/discharging. Since the mechanical strength is great, the anode can have a larger area. The electrolyte penetrates well into the sintered body because of its 15 to 60% porosity, and consequently the internal resistance is low. Thus a lithium secondary cell having a high capacity and excellent cycle characteristics is provided.

公开(公告)号：JP2002100345A

公开(公告)日：2002-04-05

申请号：JP2001236320

申请日：2001-08-03

Applicant: KAO CORP

Inventor： KAJIURA YOSHIO ,  SUZUKI ATSUSHI

IPC: H01M4/1391 ,  H01M4/62 ,  H01M4/04 ,  H01M4/02 ,  H01M4/58

Abstract: PROBLEM TO BE SOLVED: To provide a positive electrode for a nonaqueous secondary battery to give a high capacity and a superior cycle characteristic. SOLUTION: This is a porous sintered body composed of lithium transition metal oxide, and the positive electrode having a porosity of 15 to 60% and having an electric conductivity of not less than 0.1 mS/cm is used.

公开(公告)号：JPH11329433A

公开(公告)日：1999-11-30

申请号：JP14095798

申请日：1998-05-22

Applicant: KAO CORP

Inventor： KAJIURA YOSHIO

IPC: H01M10/05 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/36 ,  H01M10/052 ,  H01M10/0565 ,  H01M10/0566 ,  H01M4/58 ,  H01M4/02 ,  H01M4/04 ,  H01M10/40

Abstract: PROBLEM TO BE SOLVED: To provide a sufficient strength of being never reduced in the impact resistance or charge and discharge cycle durability of an electrode by using a sintered body obtained by molding silicon powder and a fibrous reinforcing material into a prescribed form followed by thermally treating in non-oxidizing atmosphere as a battery negative electrode material. SOLUTION: Silicon powder used for a nonaqueous secondary battery negative electrode desirably has a particle size of about 0.1-10 μm, and its purity is set to 90% or more. In order to provide a high capacity, the content of silicon is set to 30-90 wt.% in the sintered body, desirably, 50-90 wt.%. In order to impart sufficient mechanical strength and conductivity to the negative electrode, the content rate of the fibrous reinforcing material is set to 1-70 wt.%, desirably, 5-30 wt.%. A mixed powder consisting of silicon powder and the fibrous reinforcing material is pressure molded by a pressing machine and thermally treated under non-oxidizing atmosphere in the temperature range of 600-1400 deg.C to provide a negative electrode sintered body. The sintered body desirably consists of a porous body having a porosity of 15-60%.

公开(公告)号：JPH09245788A

公开(公告)日：1997-09-19

申请号：JP4466996

申请日：1996-03-01

Applicant: KAO CORP

Inventor： NAKANISHI KUNIYUKI ,  FUJII SHIGEO ,  ISSHIKI NOBUYUKI ,  SUZUKI ATSUSHI ,  KAJIURA YOSHIO

IPC: H01M10/05 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0566 ,  H01M4/58 ,  H01M10/40

Abstract: PROBLEM TO BE SOLVED: To provide a non-aqueous secondary battery with its superior discharge capacity by burning a thermosetting resin and providing a glass-shaped carbon material with a specified atom number ratio and specific surface area of hydrogen and carbon as a negative electrode material of a non-aqueous battery. SOLUTION: A glass-shaped carbon material in which thermosetting resin is burned is used for a negative electrode material for non-aqueous battery. In this carbon material, the atom number ratio between hydrogen and carbon (H/C) is 0.15 to 0.5, and the specific surface with the BET method is 100 to 500m /g. Furthermore, in the case of the glass-shaped carbon material it is preferable that the intra-planar interval doo2 is 3.37Å or more and the crystal size Lc is 50Å or less. In addition, it is preferable that the glass-shaped carbon material is 2.0g/cm in the degree of vacuum and 0.1 to 50μm in particle size. The thermosetting resin preferably uses a copolycondensation body of phenol, furfurly alcohol, and formaldehyde.

公开(公告)号：JP2000251877A

公开(公告)日：2000-09-14

申请号：JP5064099

申请日：1999-02-26

Applicant: KAO CORP

Inventor： KAJIURA YOSHIO ,  SUZUKI ATSUSHI

IPC: H01M4/13 ,  H01M4/66 ,  H01M10/05 ,  H01M4/02 ,  H01M4/04 ,  H01M4/58 ,  H01M10/40

Abstract: PROBLEM TO BE SOLVED: To enhance the oxidation resistance of a collector and to provide a positive electrode body capable of stably charging and discharging, even in high charging and discharging potentials by providing a positive electrode body, which contains a lithium transition metal composite oxide as an active material and the collector tightly fitted to the positive electrode body, and by forming the collector with a conductive oxide. SOLUTION: A conductive oxide refers to an oxide showing electron conductivity close to metal conduction at around room temperature, a collector formed of the conductive oxide has high oxidation resistance as well as high electron conductivity, and has a good charge-discharge characteristic because the collector is not oxidized. Preferably, a positive electrode body is a sintered body, containing a lithium transition metal composite oxide and is sintered and integrated with the collector. By using the sintered body for the positive electrode body and sintering and integrating it with the collector, the capacity density of the positive electrode body is enhanced, and the contact resistance between the positive electrode body and the collector is reduced and stabilized, so that this positive electrode having high capacity density a satisfactory charge-discharge characteristic can be provided. LiCoO2, LiNiO2 or the like can be cited as a lithium transition metal composite oxide.

公开(公告)号：JP2000195523A

公开(公告)日：2000-07-14

申请号：JP36733398

申请日：1998-12-24

Applicant: KAO CORP

Inventor： SUZUKI ATSUSHI ,  KAJIURA YOSHIO

IPC: H01M4/13 ,  H01M4/64 ,  H01M4/66 ,  H01M10/05 ,  H01M4/02 ,  H01M10/40

Abstract: PROBLEM TO BE SOLVED: To provide a nonaqueous secondary battery of which electrical contact to the sintered body of a collector is good and stable. SOLUTION: By using a collector 5 having an elastically deforming property, the collector 5 is tightly fitted to a positive electrode sintered body or negative electrode sintered body (a) and thereby, stable electrical contact can be maintained. For example, a member composed by covering an elastic body 1 with metal foil 2 or a conductive polymer 4 can be used as the collector.