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1. 发明专利

JPS58166657A FUEL CELL 失效
公开(公告)号：JPS58166657A
公开(公告)日：1983-10-01
申请号：JP4949382
申请日：1982-03-27
申请人： HITACHI LTD , HITACHI CHEMICAL CO LTD
发明人： KAHARA TOSHIKI , ISHII KENZOU , TAKEUCHI SEIJI , IMAHASHI JINICHI , HONCHI AKIO , MATSUDA SHINPEI
IPC分类号： H01M8/02
摘要： PURPOSE:To easily impregnate phosphoric acid in a matrix, by both preparing the matrix holding the phosphoric acid from a phosphoric acid resistant material and metal phosphate and interposing phosphoric acid resistant material fiber or fiber cloth in the matrix to increase holding power of the phosphoric acid. CONSTITUTION:Silicon carbonide powder is added with zirconium oxide powder and mixed by a ball mill or the like, and then concentrated phosphoric acid and distrilled water are added to form a paste state material of small viscosity. After this paste state material is applied to, for instance, 0.5g per 1cm of an electrode plate, a silicon carbonide fiber is embedded in a matrix at 5-10mm. distance then heated to perform reaction of zirconium oxide with phosphoric acid and form zirconium phosphate. In this way, phosphoric acid is easily supplied, and deterioration of performance of a cell due to disappearance of the phosphoric acid is eliminated, then holding power of the phosphoric acid can be increased.

2. 发明专利

JPS58166642A FUEL CELL 失效
公开(公告)号：JPS58166642A
公开(公告)日：1983-10-01
申请号：JP4950082
申请日：1982-03-27
申请人： HITACHI LTD , HITACHI CHEMICAL CO LTD
发明人： KAHARA TOSHIKI , ISHII KENZOU , TAKEUCHI SEIJI , IMAHASHI JINICHI , HONCHI AKIO , MATSUDA SHINPEI
IPC分类号： H01M4/86 , H01M4/88
摘要： PURPOSE:To prevent the generation of a crack in an electrode catalytic layer, by spraying electrode catalytic powder onto an electrode base plate of a cell using a gas diffusive electrode and fixing the powder with a binding agent to form the electrode catalytic layer. CONSTITUTION:A binding agent, in which polytetrafluoroethylene fine powder or the like is dispersed in water by a surface active agent, is sprayed onto a porous electrode base plate then allowed to pass through electrode catalytic powder holding platinum to carbon powder, for instance, a wire net of 200mesh, and the obtained finely forned powder is sprayed so as to be 5mg per 1cm electrode base plate further dried by air after roll press and fired. In this way, generation of a crack in an electrode catalytic layer can be prevented.

3. 发明专利

JPS57152679A FUEL CELL 失效
公开(公告)号：JPS57152679A
公开(公告)日：1982-09-21
申请号：JP3784581
申请日：1981-03-18
申请人： HITACHI LTD , HITACHI CHEMICAL CO LTD
发明人： KAHARA TOSHIKI , MATSUDA SHINPEI , ISHII KENZOU , TAKEUCHI SEIJI , IMAHASHI JINICHI , HONCHI AKIO
IPC分类号： H01M2/16 , H01M8/02
摘要： PURPOSE:To increase the amount of phosphoric acid to be carried and to improve the performance of a cell by a construction wherein a matrix carrying phosphoric acid between gas diffused electrodes of a fuel cell is formed of a multiple oxide mainly composed of zirconium oxide and a binder. CONSTITUTION:Carbon powder carrying platinum is applied onto carbon paper to form a gas diffused electrode. The electrodes are used as the anode (fuel electrode) 2 and the cathode (air electrode) 3 and a matrix 1 carrying phosphoric acid is provided between the electrodes 2, 3 to form a fuel cell. A solution with tetrafluoroethylene fine powder, for instance, as a binder suspended in water, is added to zirconium (ZrSiO4) fine powder, for instance, as a multiple oxide mainly composed of zirconium oxide in order to prepare a mixture. The mixture is heated and made to carry phosphoric acid to make the matrix 1.

4. 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.

5. 发明专利

JPH09102309A LITHIUM SECONDARY BATTERY 失效
公开(公告)号：JPH09102309A
公开(公告)日：1997-04-15
申请号：JP25849095
申请日：1995-10-05
申请人： HITACHI LTD , HITACHI CHEMICAL CO LTD
发明人： MOMOSE HIDETO , HONBOU HIDETOSHI , TAKEUCHI SEIJI , MURANAKA TADASHI
IPC分类号： H01M10/05 , C01B31/04 , H01M4/133 , H01M4/583 , H01M10/052 , H01M4/58 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide a lithium secondary battery having high capacity and long life. SOLUTION: Graphite powders, in which the percentage of edge surfaces is increased so that lithium is easily intercalated, are used as a negative active material. Graphite crystals are specified by the degree of anisotropy of the graphite crystals which appears on an ESR pattern, and the percentage of the edge surfaces is specified by the intensity ratio of the two Raman peaks of the graphite material. This constitution provides a secondary battery having high capacity and long cycle life.

6. 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.

7. 发明专利

JPS58166655A LAYER-BUILT TYPE FUEL CELL 失效
公开(公告)号：JPS58166655A
公开(公告)日：1983-10-01
申请号：JP4949082
申请日：1982-03-27
申请人： HITACHI LTD , HITACHI CHEMICAL CO LTD
发明人： ISHII KENZOU , KAHARA TOSHIKI , TAKEUCHI SEIJI , IMAHASHI JINICHI , HONCHI AKIO , MATSUDA SHINPEI
IPC分类号： H01M8/02
摘要： PURPOSE:Layer-built type fuel cell, in which the necessity for inserting an insulator is eliminated to effectively prevent permeation of gas by applying a seal of proper thickness around a fuel electrode and oxidizing agent electrode. CONSTITUTION:A seal 4 consisting of an end part seal 3b at the side of a base material 1 and a seal 3a at the side of a catalytic layer 2 is formed to an electrode end part of the porous base material 1 forming the layer 2. An electrode matrix 6 is filled in a combined space between a fuel electrode 4 and oxidizing agent electrode 5 forming said seal 3 to form the single cell of a layer-built type fuel cell. A thickness of this seal 3 in a side of the matrix 6 is formed larger than in a side of the layer 2. In this constitution, the necessity for especially interposing a seal corresponding to seals 4a, 5a is eliminated for filling the matrix 6, and permeation of gas can be fully prevented.

8. 发明专利

JPS58166639A FUEL CELL 失效
公开(公告)号：JPS58166639A
公开(公告)日：1983-10-01
申请号：JP4949682
申请日：1982-03-27
申请人： HITACHI LTD , HITACHI CHEMICAL CO LTD
发明人： IMAHASHI JINICHI , ISHII KENZOU , TAKEUCHI SEIJI , KAHARA TOSHIKI , HONCHI AKIO , MATSUDA SHINPEI
IPC分类号： H01M4/86 , H01M8/02
摘要： PURPOSE:To improve strength of an electrode catalytic layer, by mixing phosphoric acid resistant fiber of matrix material, silicon carbonide fiber, graphite silicon fluorid fiber, etc. in a catalytic active ingredient of a pair of electrodes having a catalytic active gradient. CONSTITUTION:Electrode catalytic powder holding noble metal to carbon powder, matrix material fiber, silicon carbonide fiber, graphite silicon fluorid fiber, etc. are mixed, added with water and kneaded by a kneader or the like. Polytetrafluoroethylene dispersion of an organic binder is added to the above kneaded material again kneaded. This kneaded material is applied to an electrode base material, dried and fired to form an electrode plate. In this way, strength of an electrode catalytic layer can be improved.

9. 发明专利

JPS58117655A PHOSPHORIC ACID ELECTROLYTE FUEL CELL 失效
公开(公告)号：JPS58117655A
公开(公告)日：1983-07-13
申请号：JP19882
申请日：1982-01-06
申请人： HITACHI LTD , HITACHI CHEMICAL CO LTD
发明人： KAHARA TOSHIKI , MATSUDA SHINPEI , ISHII KENZOU , TAKEUCHI SEIJI , IMAHASHI JINICHI , HONCHI AKIO
IPC分类号： H01M8/02
摘要： PURPOSE:To provide a fuel cell having a matrix which has large holding capability of phosphoric acid electrolyte by constructing with phosphate the matrix holding phosphoric acid as an electrolyte. CONSTITUTION:A phosphoric acid electrolyte matrix 1 is applied on one gas diffusion electrode 3 so as to become 0.3mm. thick, and other gas diffusion electrode 2 is stacked thereon and bonded in one body to form a fuel cell. As a phosphate compound used as an electrolyte holding matrix, for example, either of zirconium phosphate, titanium phosphate, stannum phosphate, aluminam phosphate, or silicon phosphate is used. These phosphate compounds are stable in phosphoric acid at about 200 deg.C and has high insulating property and good affinity with phosphoric acid. Therefore, phosphoric acid holding capability of the matrix prepared with these material is 2-3 times that of a conventional matrix.

10. 发明专利

JPS58103784A FUEL CELL 失效
公开(公告)号：JPS58103784A
公开(公告)日：1983-06-20
申请号：JP20162681
申请日：1981-12-16
申请人： HITACHI LTD , HITACHI CHEMICAL CO LTD
发明人： ISHII KENZOU , MATSUDA SHINPEI , KAHARA TOSHIKI , TAKEUCHI SEIJI , IMAHASHI JINICHI
IPC分类号： H01M8/02 , H01M8/04 , H01M8/24
摘要： PURPOSE:To readily supply an electrolyte to a matrix from the outside of a battery and provide a cell having stable performance and long life by passing through a path connecting a separator, a fuel electrode, a matrix, and an oxidizing agent electrode with an electrolyte reservoir installed in the edge of the separator by an electrolyte supply groove installed in the separator. CONSTITUTION:When an electrolyte is supplied, an electrolyte is filled in an electrolyte path 9 and overflowed in an electrolyte reservoir 8 of each cell. The electrolyte overflowed in the electrolyte reservoir 8 enters an electrolyte supply groove 6 and is supplied to a matrix 1 through an electrolyte connecting path 10. To prevent wetting of a fuel electrode base material 2a by the electrolyte, the fuel electrode base material 2a is coated with polytetrafluoroethylene to make it water repellent. When the electrolyte is supplied to the fuel electrode base material 2a by electrolyte supply pressure, the number of the stacked cells which are an electrolyte supply unit are decreased to reduce electrolyte supply pressure. After the electrolyte is filled in electrolyte supply groove 6, the electrolyte is removed from the electrolyte path 9 to prevent liquid short circuit by the electrolyte.

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