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61. 发明专利

JP2000100431A MANUFACTURE FOR GRAPHITE PARTICLE, GRAPHITE PARTICLE, GRAPHITE PASTE USING GRAPHITE PARTICLE, NEGATIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY, AND LITHIUM SECONDARY BATTERY 失效
公开(公告)号：JP2000100431A
公开(公告)日：2000-04-07
申请号：JP26426798
申请日：1998-09-18
申请人： HITACHI CHEMICAL CO LTD
发明人： NISHIDA TATSUYA , ISHII YOSHITO , TAKEI KOICHI , FUJITA ATSUSHI , YAMADA KAZUO
IPC分类号： C04B35/52 , C01B31/04 , H01M4/133 , H01M4/1393 , H01M4/587 , H01M10/05 , H01M10/0525 , H01M10/0566 , H01M4/58 , H01M4/02 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To suit to a lithium secondary battery having high capacity and excellent in quick charging and discharging. SOLUTION: The graphite particles are manufactured by mixing a graphitizable aggregate with a graphitizable binder, then by baking and graphitizing them. Here, 0.1-20 wt.% of the graphitizable aggregate is acidized graphite having volatile portions 0.1-5 wt.%. In the graphite particles manufactured by this manufacturing method for graphite particles, the inter-lattice distance (d002) in the thickness direction by a wide-angle X-ray diffraction is not more than 3.380 Å, and the size (Lc) of a crystallite in the thickness direction is not less than 500 Å. The graphite paste is formed by adding and mixing an organic binder and a solvent into the graphite particles. The negative electrode for lithium secondary battery is formed by applying and integrating the graphite paste to a collector. Further, in the lithium secondary battery, a positive electrode and a negative electrode are oppositely arranged through a separator, and an electrolyte is injected into the periphery of them.

62. 发明专利

JP2000053408A EXPANDED GRAPHITE PARTICLE, ITS PRODUCTION, LITHIUM SECONDARY CELL, ITS NEGATIVE POLE AND NEGATIVE POLE MATERIAL 失效
公开(公告)号：JP2000053408A
公开(公告)日：2000-02-22
申请号：JP22184998
申请日：1998-08-05
申请人： HITACHI CHEMICAL CO LTD
发明人： TAKEI KOICHI , NISHIDA TATSUYA , ISHII YOSHITO , FUJITA ATSUSHI , YAMADA KAZUO
IPC分类号： C01B31/04 , H01M4/133 , H01M4/587 , H01M10/05 , H01M4/02 , H01M4/58 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To obtain a negative pole material of a lithium secondary cell containing expanded graphite particles having improved properties such as degradation in workability of slurry used as the negative pole material of the lithium secondary cell, orientation of particles in the plane direction of a collector, degradation in cycle characteristics and increase in irreversible capacitance, to provide the expanded graphite particles and a suitable producing method of the particles, to provide a negative pole of the lithium ion secondary cell which is obtained by using the negative pole material of the lithium secondary cell above described and which has high capacitance for charging and discharging and excellent cycle characteristics and to provide the lithium secondary cell using this negative pole. SOLUTION: The expanded graphite particles have 0.3 to 0.8 bulk density. In the producing method of the expanded graphite particles, source material graphite particles having an aggregated or bonded structure of plural planer particles with nonparallel orientation planes are treated with an acid to form an interlayer compd., and then, the obtd. compd. is heated and expanded. A negative pole material for a lithium secondary cell contains the expanded graphite particles above described, and a negative pole for the lithium secondary cell is produced by forming layers of the negative pole material for the lithium secondary cell above described on a negative pole collector. The lithium secondary cell consists of a positive pole and the negative pole for the lithium secondary cell above described.

63. 发明专利

JPH11199212A GRAPHITE PARTICLE, ITS PRODUCTION, GRAPHITE PASTE, NEGATIVE POLE FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY 失效
公开(公告)号：JPH11199212A
公开(公告)日：1999-07-27
申请号：JP815298
申请日：1998-01-20
申请人： HITACHI CHEMICAL CO LTD
发明人： NISHIDA TATSUYA , ISHII YOSHITO , TAKEI KOICHI , FUJITA ATSUSHI , YAMADA KAZUO
IPC分类号： C01B31/04 , H01M4/133 , H01M4/1393 , H01M4/587 , H01M4/62 , H01M10/05 , H01M4/02 , H01M4/04 , H01M4/58 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide a producing method of a graphic particle having high capacity and excellent rapid charge and discharge property and cycle property and suitable for a lithium secondary battery, the graphite particles, and a negative pole for lithium secondary battery, and the lithium secondary battery having high capacity, excellent in rapid charge and discharge property and cycle property. SOLUTION: In the producing method of the graphite particle containing a graphitizable aggregate or graphite and a binder as starting material, the binder contains a thermosetting resin having an element composition ratio oxygen/carbon of >=0.1 and >=20 wt.% actual carbon ratio at the time of carbonizing in a non-oxidizing atmosphere at 1000 deg.C. The graphite particle is produced by this method, the graphite paste contains the graphite particle, the negative pole for the lithium secondary battery contains the graphite particle and is formed by coating an electric collector with the graphite paste to integrate and the lithium secondary battery has the negative pole 2 and a positive pole 1.

64. 发明专利

JPH11199211A GRAPHITE PARTICLE, ITS PRODUCTION, LITHIUM SECONDARY BATTERY AND NEGATIVE POLE THEREOF 失效
公开(公告)号：JPH11199211A
公开(公告)日：1999-07-27
申请号：JP815198
申请日：1998-01-20
申请人： HITACHI CHEMICAL CO LTD
发明人： TAKEI KOICHI , ISHII YOSHITO , NISHIDA TATSUYA , FUJITA ATSUSHI , YAMADA KAZUO
IPC分类号： C01B31/04 , H01M4/133 , H01M4/36 , H01M4/38 , H01M4/587 , H01M10/05 , H01M4/02 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide a lithium secondary battery excellent in rapid charge and discharge property, cycle property, irreversible capacity at the first cycle or the like, a graphite particle for obtaining the same and G producing method therefor. SOLUTION: The graphite particle has a particle structure, which is formed by aggregating or bonding plural flat particles so that oriented surfaces are non-parallel to each other, and is covered with an amorphous carbon on the particle surface. The producing method of the graphite particle comprises forming a graphite particle by a method containing a process for mixing a graphitizable aggregate or a graphite, a graphitizable binder and a graphitizing catalyst, a firing and graphitizing process and a pulverizing process, and next, covering the surface of the graphite particle with an organic high molecular compound and amorphously carbonizing the organic high molecular compound. The negative pole for the lithium secondary battery contains graphite particle or the graphite particle produced by this method, and the lithium secondary battery is obtained by using graphite particle or the graphite particle produced by this method as a negative pole material.

65. 发明专利

JPH1121115A PRODUCTION OF CARBON MATERIAL, CARBON PASTE USING CARBON MATERIAL, NEGATIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY 失效
公开(公告)号：JPH1121115A
公开(公告)日：1999-01-26
申请号：JP17691197
申请日：1997-07-02
申请人： HITACHI CHEMICAL CO LTD
发明人： ISHII YOSHITO , NISHIDA TATSUYA , FUJITA ATSUSHI , YAMADA KAZUO
IPC分类号： C01B31/02 , H01M4/133 , H01M4/1393 , H01M4/587 , H01M10/05 , H01M4/02 , H01M4/58 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide a process for producing a lithium battery having a high capacity and excellent rapid charging/discharging characteristics and a carbon material for obtaining the same, a carbon paste using the carbon material and a negative electrode for the lithium secondary battery. SOLUTION: This process for producing the carbon material consists in mixing >=2 kinds of org. materials varying in a shrinkage rate (ΔV) when carbonized and firing the mixture in a nonoxidizing atmosphere. In such a case, the shrinkage rate (ΔV) is expressed by equation: d=(1-ΔW/100)/(1-ΔV/100)×d0 when the true sp. gr. of the org. material before the firing is defined as d0 , the true sp. gr. of the carbon material after the firing as (d) and the residual carbon rate when the org. material is fired as ΔW. The difference in the shrinkage rate (ΔV) between the org. materials to be mixed is 0.5 to 30%. The carbon paste is prepd. by adding an org. binder and solvent to the produced carbon materials and mixing the mixture. The negative electrode for the lithium secondary battery is produced by applying the carbon paste to a current collector and integrating both. The lithium secondary battery is formed by arranging the negative electrode and positive electrode for the lithium secondary battery opposite to each other via a separator and injecting an electrolyte to the periphery thereof.

66. 发明专利

JPH10236808A GRAPHITE GRAIN, ITS PRODUCTION, GRAPHITE PASTE USING GRAPHITE GRAIN, NEGATIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY, ITS PRODUCTION AND LITHIUM SECONDARY BATTERY 失效
公开(公告)号：JPH10236808A
公开(公告)日：1998-09-08
申请号：JP33100697
申请日：1997-11-14
申请人： HITACHI CHEMICAL CO LTD
发明人： NISHIDA TATSUYA , ISHII YOSHITO , FUJITA ATSUSHI , YAMADA KAZUO
IPC分类号： C01B31/04 , B01J27/24 , H01M4/1393 , H01M4/587 , H01M10/05 , H01M4/02 , H01M4/04 , H01M4/58 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide a graphite grain appropriate to a high-capacity lithium secondary battery excellent in quick charge and discharge characteristics, the grain producing method, a graphite paste appropriate to the high-capacity lithium secondary battery excellent in quick charge and discharge characteristics and cycle characteristic and the lithium secondary battery. SOLUTION: The side of the crystallite of this graphite in the c-axis direction (thickness direction) of the crystal in X-ray wide-angle diffraction is controlled to >=500Å and that in the facial direction to

67. 发明专利

JPH10158005A GRAPHITE PARTICLE, ITS PRODUCTION, GRAPHITE PASTE USING THE SAME, NEGATIVE ELECTRODE OF LITHIUM SECONDARY CELL AND LITHIUM SECONDARY CELL 失效
公开(公告)号：JPH10158005A
公开(公告)日：1998-06-16
申请号：JP22420297
申请日：1997-08-06
申请人： HITACHI CHEMICAL CO LTD
发明人： ISHII YOSHITO , NISHIDA TATSUYA , FUJITA ATSUSHI , YAMADA KAZUO
IPC分类号： C04B35/52 , C01B31/04 , H01M4/587 , H01M4/62 , H01M10/05 , H01M10/052 , H01M10/0566 , H01M4/02 , H01M4/04 , H01M4/58 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide graphite particles having excellent rapid charge and discharge characteristics and cycle characteristics which are suitable for a lithium secondary cell, to provide graphite particles showing small irreversible capacity for a first cycle and excellent cycle characteristics which are suitable for a lithium secondary cell, and to provide a producing method of graphite particles and a graphite paste and a lithium secondary cell using the particles. SOLUTION: The graphite particles are produced by aggregating or bonding plural planer particles having orientation planes nonparallel to each other, /g specific surface area. The graphite particles are produced by mixing a graphite or an aggregate which can be graphitized, with a binder which can be graphitized with addition of a graphite catalyst by 1 to 50wt.%, and calcining and pulverizing. An org. binder and solvent are mixed to the obtd. graphite particles to obtain a graphite paste. The lithium secondary cell is produced by applying the graphite paste on an electric collector to form a body of a negative electrode for a lithium secondary cell, disposing the obtd. electrode to face a positive electrode through a separator, and injecting an electrolytic liquid around the electrodes.

68. 发明专利

JPH0925476A PRODUCTION OF SHEET-LIKE COMPOSITE MATERIAL AND GASKET USING THE SAME 失效
公开(公告)号：JPH0925476A
公开(公告)日：1997-01-28
申请号：JP7204896
申请日：1996-03-27
申请人： HITACHI CHEMICAL CO LTD
发明人： ISHII YOSHITO , FUJITA ATSUSHI , NISHIDA TATSUYA , SEKI TOMONORI , YAMADA KAZUO , AIZAWA TERUKI , HIRAI YASUYUKI
IPC分类号： F16J15/10 , B32B9/00 , C04B35/52 , C04B41/83 , C09J7/02 , C09J163/00 , C09J201/00 , C09K3/10 , F16J15/12
摘要： PROBLEM TO BE SOLVED: To obtain the subject composite material excellent in heat resistance, sealing ability, mechanical strength, etc., and useful for e.g. gaskets, by making resin powder adhere to the surface of a sheeting followed by heating the resin powder to effect softening or melting it followed by cooling, and then adhesively laminating the resultant surface with a reinforcing core material. SOLUTION: (A) the surface of a sheeting such as an expanded graphite sheet in density is stuck with (B) resin powder [e.g. powder of a curable dihydrobenzoxazine ring-contg. resin made up of chemical structural, unit (B1 ) of formula I. (the H atoms bound to the aromatic ring, except one on the ortho-site of the OH group, may be substituted by substituents) and chemical structural unit (B2 ) of formula II (R1 is a hydrocarbon group; the H atoms bound to the aromatic ring may be substituted by substituents) at the molar ratio B1 /B2 of (4:1) to (1:9)] followed by heating the component B to effect softening or melting, and cooling and then laminating the resultant surface with (C) a reinforcing core material such as a metallic plate to effect bonding.

69. 发明专利

JPH08335460A MANUFACTURE OF CARBON MATERIAL FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY USING CARBON MATERIAL FOR LITHIUM SECONDARY BATTERY 失效
公开(公告)号：JPH08335460A
公开(公告)日：1996-12-17
申请号：JP14049495
申请日：1995-06-07
申请人： HITACHI CHEMICAL CO LTD
发明人： ISHII YOSHITO , YAMADA KAZUO , NISHIDA TATSUYA , FUJITA ATSUSHI , KOSUGI TETSUO
IPC分类号： C01B31/00 , C01B31/04 , H01M4/587 , H01M10/05 , H01M4/58 , H01M4/02 , H01M10/40
摘要： PURPOSE: To provide the manufacturing process of a carbon material for a lithium secondary battery capable of obtaining high capacity, excellent charge/ discharge characteristics, and excellent quick charge/discharge characteristics and provide a lithium secondary battery using the carbon material for the lithium secondary battery. CONSTITUTION: A graphite intercalation complex is synthesized by immersing natural graphite powder in a mixed solution of concentrated sulfuric acid and an oxidizing agent and intercalating the sulfuric acid between layers of graphite, and the graphite intercalation complex is heated at 150-500 deg.C to make the volume 10 times or less that of the original natural graphite powder. A lithium secondary battery has a positive electrode 10, a negative electrode 11, an electrolyte, and a separator 12, and the carbon material obtained is used in the negative electrode 11.

70. 发明专利

JPH06344316A PRODUCTION OF EXPANDED GRAPHITE SHEET 失效
公开(公告)号：JPH06344316A
公开(公告)日：1994-12-20
申请号：JP13838293
申请日：1993-06-10
申请人： HITACHI CHEMICAL CO LTD
发明人： ISHII YOSHITO , NISHIDA TATSUYA , HORIUCHI RYUTA , FUJITA ATSUSHI
IPC分类号： B28B1/52 , C01B31/04 , C09K3/10 , D01F9/12
摘要： PURPOSE:To produce an asbestos-free expanded graphite sheet excellent in heat resistance, oil resistance and mechanical strength. CONSTITUTION:Expanded graphite with a bulk density of 0.01-0.1g/cm and a carbon fiber obtained by carbonizing synthetic pulp made infusible are uniformly mixed in water and the resulting aq. mixture is subjected to wet papermaking processing to produce an expanded graphite sheet.

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