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1. 发明专利

JP2000200606A NONAQUEOUS SECONDARY BATTERY AND GRAPHITE POWDER MANUFACTURE 失效
公开(公告)号：JP2000200606A
公开(公告)日：2000-07-18
申请号：JP2000033271
申请日：2000-02-10
申请人： HITACHI LTD , HITACHI CHEMICAL CO LTD
发明人： HONBOU HIDETOSHI , TAKEUCHI SEIJI , MOMOSE HIDETO , HORIBA TATSUO , MURANAKA TADASHI , ISHII YOSHITO
IPC分类号： H01M10/05 , C01B31/02 , C01B31/04 , H01M4/587 , H01M10/0525 , H01M10/0566 , H01M4/58 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To enlarge lithium storage/discharging capacity by constituting a negative electrode so as to contain graphite powder rhombohedral graphite structure below a specific percent. SOLUTION: Either of natural graphite or artificial graphite may be used for a material (raw graphite) of graphite powder, and especially scale-shaped natural graphite is preferable. A jet mill is used for a machine pulverizing the raw graphite into the grain size 100 μm or less. This machine can reduce the generated quantity of amorphous carbon. The pulverized raw graphite (raw powder) contains rhombohedral structure graphite by 30%. The graphite powder obtained by pulverization is treated by an acidic solution containing at least one of sulfuric acid, nitric acid, perchloric acid, phosphoric acid, and hydrofluororic acid. Secondly, the compound is washed, neutralized, and dried to remove anions in the acidic solution to be obtain a desired graphite powder. In this case, the presence rates of the rhombohedral structure and the hexagonal structure are set to 20% or less and 80% or more respectively.

2. 发明专利

JPH0896798A NEGATIVE ELECTRODE FOR LITHIUM BATTERY AND LITHIUM BATTERY USING THIS NEGATIVE ELECTRODE 失效
公开(公告)号：JPH0896798A
公开(公告)日：1996-04-12
申请号：JP18116295
申请日：1995-07-18
申请人： HITACHI CHEMICAL CO LTD , HITACHI LTD
发明人： ISHII YOSHITO , NISHIDA TATSUYA , KOSUGI TETSUO , YAMADA KAZUO , TAKEUCHI SEIJI
IPC分类号： C01B31/04 , H01M4/133 , H01M4/1393 , H01M4/583 , H01M10/05 , H01M4/02 , H01M4/58 , H01M10/40
摘要： PURPOSE: To make continuous cycle use possible with large charge/discharge capacity maintained by containing a current collector and expanded graphite with an impurity content of a specified value or less or a crushed material of a compressed molding of expanded graphite to be integrated to the current collector in a negative electrode for a lithium battery. CONSTITUTION: Concentrated sulfuric acid and hydrogen peroxide are added to flake natural graphite to produce graphite intercalation compound, the graphite intercalation compound is dried and heated to produce 200-fold expanded graphite. The expanded graphite is compressed with a roll, then crushed with a jet mill so as to have a mean particle size of 10μm, purifying treatment is conducted in a non-oxidizing atmosphere furnace to reduce the impurity content to 20000ppm or less, preferably to 10ppm or less. The crushed material is kneaded with cetylene propylene terpolymer dissolved in xylene, the kneaded material is applied to a 20μm-thick copper foil, dried, then they are integrally compressed to form a negative electrode. Evaluation is conducted in such a way that the negative electrode serving as a specimen electrode 3 is combined with a separator 4 and a counter electrode 5, they are put into a glass cell 1, an electrolyte is filled, and a reference electrode 6 is arranged.

3. 发明专利

JP2000106183A NON-AQUEOUS SECONDARY BATTERY AND MANUFACTURE OF GRAPHITE POWDER 失效
公开(公告)号：JP2000106183A
公开(公告)日：2000-04-11
申请号：JP29269199
申请日：1999-10-14
申请人： HITACHI LTD , HITACHI CHEMICAL CO LTD
发明人： HONBOU HIDETOSHI , TAKEUCHI SEIJI , MOMOSE HIDETO , HORIBA TATSUO , MURANAKA TADASHI , ISHII YOSHITO
IPC分类号： C01B31/04 , H01M4/133 , H01M4/36 , H01M4/587 , H01M10/05 , H01M10/0525 , H01M10/0566 , H01M4/58 , H01M4/02 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide a carbon material having superior reversibility of storage and release of lithium, and provide a nonaqueous secondary battery using this carbon material as a negative electrode material and having high energy density and an superior quick charge and discharge characteristic. SOLUTION: Graphite powder, having a grain size at 100 μm or less and existing in the crystal structure of the ratio for the rhombohedral structure being 20% or less, is used as a negative electrode active material so as to form a nonaqueous secondary battery. This graphite powder can be obtained by crushing the graphite with a jet mill and heating it at 900 degree C or higher of temperature. In this case, a negative electrode includes the graphite powder containing 80% or more of the hexagonal structure graphite.

4. 发明专利

JPH08287910A NONAQUEOUS SECONDARY BATTERY AND MANUFACTURE OF GRAPHITE POWDER 失效
公开(公告)号：JPH08287910A
公开(公告)日：1996-11-01
申请号：JP8419695
申请日：1995-04-10
申请人： HITACHI LTD , HITACHI CHEMICAL CO LTD
发明人： HONBOU HIDETOSHI , TAKEUCHI SEIJI , MOMOSE HIDETO , HORIBA TATSUO , MURANAKA TADASHI , ISHII YOSHITO
IPC分类号： C01B31/02 , C01B31/04 , H01M4/02 , H01M4/133 , H01M4/1391 , H01M4/1393 , H01M4/505 , H01M4/525 , H01M4/58 , H01M4/587 , H01M10/05 , H01M10/0566 , H01M10/058 , H01M10/36
摘要： PURPOSE: To provide a carbon material excellent in reversibility of lithium storing-releasing reaction, and a nonaqueous secondary battery which uses this as a negative electrode material and has high energy density and is excellent in a quick charging-discharging characteristic. CONSTITUTION: A nonaqueous secondary battery is constituted by using graphite powder, on which a particle diameter is not more than 100μm and a rate of a rhombohedral structure existing in a crystal structure is not more than 20%, as a negative electrode active material. Such graphite powder is obtained by performing heat treatment on graphite at a temperature not less than 900 degrees C after it is pulverized by a jet mill.

5. 发明专利

JP2014209495A リチウム二次電池用負極及びリチウム二次電池有权
标题翻译：用于锂二次电池和锂二次电池的负极
公开(公告)号：JP2014209495A
公开(公告)日：2014-11-06
申请号：JP2014140282
申请日：2014-07-08
申请人：日立化成株式会社 , Hitachi Chemical Co Ltd
发明人： ISHII YOSHITO , SUDA SOICHIRO , NISHIDA TATSUYA
IPC分类号： H01M4/133 , H01M4/1393 , H01M4/587
CPC分类号： Y02E60/122
摘要：【課題】負極密度を高くした時に急速充放電特性及びサイクル特性に低下が少ないリチウム二次電池に好適な負極、及び二次電池の体積当りのエネルギー密度が向上した高容量リチウム二次電池を提供する。【解決手段】黒鉛粒子及び有機系結着剤の混合物と集電体とが加圧、一体化されてなるリチウム二次電池用負極において、該負極のX線回折で測定される回折強度比(002)/(110)が500以下であるリチウム二次電池用負極、及びこのリチウム二次電池用負極とリチウム化合物を含む正極を有してなるリチウム二次電池。【選択図】なし
摘要翻译：要解决的问题：为了提供一种对于在负极密度增加时快速充放电行为和循环特性降低而降低的锂二次电池所需的负极，并且提供一种高容量锂二次电池，其中提高二次电池体积的能量密度。解决方案：通过对石墨颗粒和有机粘合剂和集电体的混合物进行加压和整合来形成锂二次电池用负极。在锂二次电池用负极中，通过负极的x射线衍射测定的衍射强度比（002）/（110）为500以下。锂二次电池包括锂二次电池用负极和含锂化合物的正极。

6. 发明专利

JP2014135287A Carbon particle for lithium ion secondary battery negative electrode, negative electrode for lithium ion secondary battery, and lithium ion secondary battery 有权
标题翻译：用于锂离子二次电池负极的碳粒子，锂离子二次电池的负极和锂离子二次电池
公开(公告)号：JP2014135287A
公开(公告)日：2014-07-24
申请号：JP2014051376
申请日：2014-03-14
申请人： Hitachi Chemical Co Ltd , 日立化成株式会社
发明人： TAKAHASHI TEPPEI , ISHII YOSHITO
IPC分类号： H01M4/587 , H01M4/133
CPC分类号： Y02E60/122
摘要： PROBLEM TO BE SOLVED: To provide: a carbon particle for a lithium ion secondary battery negative electrode having high capacity and excellent cycle properties; a negative electrode for a lithium ion secondary battery containing the carbon particle; and a lithium ion secondary battery.SOLUTION: In a carbon particle used for a lithium ion secondary battery negative electrode, the circularity of a particle cross-section is in the range of 0.6-0.9, and the interlayer distance d(002) of a graphite crystal and the crystalline size Lc(002) in a C axial direction, which are determined by X-ray diffraction measurement, are 3.38 Å or less and 500 Å or more, respectively. In a sample negative electrode containing the carbon particle, a ratio Ih002/Ih110 of peak intensities on the carbon 002 plane (a plane horizontal to a graphite layer) and on the carbon 110 plane (a plane vertical to the graphite layer) measured by X-ray diffraction is 600 or less.
摘要翻译：要解决的问题：提供：具有高容量和优异的循环性能的锂离子二次电池负极用碳粒子; 含有碳粒子的锂离子二次电池用负极; 和锂离子二次电池。解决方案：在用于锂离子二次电池负极的碳颗粒中，颗粒截面的圆形度在0.6-0.9的范围内，并且a的层间距离d（002）石墨晶体和通过X射线衍射测定确定的C轴方向的结晶尺寸Lc（002）分别为3.38以下且500以上。在含有碳颗粒的样品负极中，通过X测量的碳002平面（水平于石墨层的平面）和碳110平面（垂直于石墨层的平面）上的峰强度的比Ih002 / Ih110 射线衍射为600以下。

7. 发明专利

JP2014116155A Negative electrode material for lithium ion secondary battery, negative electrode for lithium ion secondary battery, lithium ion secondary battery, and method for producing negative electrode material for lithium ion secondary battery 有权
标题翻译：用于锂离子二次电池的负极电极材料，用于锂离子二次电池的负极，锂离子二次电池和用于生产用于锂离子二次电池的负极电极材料的方法
公开(公告)号：JP2014116155A
公开(公告)日：2014-06-26
申请号：JP2012268552
申请日：2012-12-07
申请人： Hitachi Chemical Co Ltd , 日立化成株式会社
发明人： USUI TATSUYA , SUGA KEITA , OSAKI YOSHIE , HONBO HIDETOSHI , OZEKI KATSUTOMO , ISHII YOSHITO
IPC分类号： H01M4/587 , H01M4/36
摘要： PROBLEM TO BE SOLVED: To provide a negative electrode material for a lithium ion secondary battery, capable of configuring a lithium ion secondary battery that is low in initial irreversible capacity, high in initial charge/discharge efficiency, high in energy density and excellent in life characteristics.SOLUTION: A negative electrode material for a lithium ion secondary battery is a carbonaceous particle having an interplanar spacing d002 of the (002) plane as determined by the measurement using an X-ray diffraction device (XRD) of 0.340 nm or more and 0.370 nm or less, while the number of adhering carbonaceous particles adhering on the surface of the carbonaceous particle and having a particle size of 0.5 μm or less is 50 or less per a surface area of 130 μmof the carbonaceous particle.
摘要翻译：要解决的问题：为了提供一种锂离子二次电池用负极材料，能够构成初始不可逆容量低的锂离子二次电池，初期充放电效率高，能量密度高，寿命长特征。解决方案：锂离子二次电池用负极材料是通过使用0.340nm以上的X射线衍射装置（XRD）的测定确定的（002）面的面间距d002的碳质粒子，以及 0.370nm以下，而碳质粒子附着在粒子的粒径为0.5μm以下的附着碳粒子的数量为碳素粒子的130μm的面积的50以下。

8. 发明专利

JP2012109280A NEGATIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY 审中-公开
公开(公告)号：JP2012109280A
公开(公告)日：2012-06-07
申请号：JP2012054325
申请日：2012-03-12
申请人： HITACHI CHEMICAL CO LTD
发明人： ISHII YOSHITO , SUDA SOICHIRO , NISHIDA TATSUYA
IPC分类号： H01M4/133 , H01M4/587
摘要： PROBLEM TO BE SOLVED: To provide a negative electrode desirable for a lithium secondary battery in which decrease in a rapid charge-discharge behavior and a cycle characteristic is reduced when the negative electrode density is increased, and provide a high capacity lithium secondary battery in which the energy density per the volume of a secondary battery is improved.SOLUTION: A negative electrode for a lithium secondary battery is formed by pressurizing and integrating the mixture of a graphite particle and an organic binder agent and a collector. In the negative electrode for a lithium secondary battery, a diffraction intensity ratio (002)/(110) measured by x-ray diffraction of the negative electrode is 500 or less. A lithium secondary battery includes the negative electrode for a lithium secondary battery, and a positive electrode including a lithium compound.

9. 发明专利

JP2002343341A NEGATIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY 审中-公开
公开(公告)号：JP2002343341A
公开(公告)日：2002-11-29
申请号：JP2002092084
申请日：2002-03-28
申请人： HITACHI CHEMICAL CO LTD
发明人： ISHII YOSHITO , NISHIDA TATSUYA , FUJITA ATSUSHI , YAMADA KAZUO
IPC分类号： H01M10/05 , H01M4/133 , H01M4/1393 , H01M4/587 , H01M4/02 , H01M4/58 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide a negative electrode for a lithium secondary battery, and a lithium secondary battery, with excellent rapid charge/discharge characteristics and cycle characteristics, and that, with little irreversible capacity at the first cycle and suitable for a lithium secondary battery. SOLUTION: An organic binder or solvent is added to and mixed with graphite particles with pore size within the range of 10 to 10 Å and pore cubic volume of 0.4 to 2.0 cc/g per graphite particle weight, or graphite particles with pore size within the range of 1×10 to 2×10 Å and pore cubic volume of 0.08 to 0.4 cc/g per graphite particle weight Å to make up a paste, which is applied on a collector and integrated into a negative electrode for a lithium secondary battery, to which, a positive electrode is combined to get a lithium secondary battery.

10. 发明专利

JP2002083586A NEGATIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY 审中-公开
公开(公告)号：JP2002083586A
公开(公告)日：2002-03-22
申请号：JP2001208317
申请日：2001-07-09
申请人： HITACHI CHEMICAL CO LTD
发明人： ISHII YOSHITO , NISHIDA TATSUYA , FUJITA ATSUSHI , YAMADA KAZUO
IPC分类号： C01B31/04 , H01M4/133 , H01M4/1393 , H01M4/587 , H01M10/05 , H01M10/0525 , H01M10/0566 , H01M4/02 , H01M4/58 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide a manufacturing method or a graphite particle and graphite paste suitable for a lithium secondary battery having small irreversible capacity on a first cycle, excellent in rapid charge and discharge characteristics and cycle characteristics, and to provide the lithium secondary battery. SOLUTION: The feature of a manufacturing method or a graphite particle made by aggregating or combining plural flat particles so as to have non- parallel oriented faces, a graphite particle having an aspect ratio of 5 or less, and a graphite particle having a specific surface area of 8 m2/g or less is that 1-50 wt.% of a graphitized catalyst is added to aggregate capable of being graphitized or graphite and a binder capable of being graphitized and they are mixed and ground after baking. The graphite paste is made by adding an organic binding agent and a solvent to the aforementioned graphite particles or the graphite particles manufactured by the manufacturing method and mixing them. The negative electrode for a lithium secondary battery is made by painting this graphite paste on a collector and integrating them, and In this lithium secondary battery, the negative electrode for a lithium secondary battery and a positive electrode are disposed face to face through a separator and electrolyte is filled around them.

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