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1. 发明专利

JPS6472464A METALLIC OXIDE-HYDROGEN CELL 失效
公开(公告)号：JPS6472464A
公开(公告)日：1989-03-17
申请号：JP22651687
申请日：1987-09-11
申请人： TOSHIBA CORP
发明人： YAGASAKI ERIKO , SATO YUJI , KANDA MOTOI
IPC分类号： H01M4/38
摘要： PURPOSE:To secure a cell excellent in safety and less in self-discharge by using an hydrogen absorption alloy with a specified composition. CONSTITUTION:A metallic oxide-hydrogen cell is provided with a negative electrode composed of a positive electrode, an alkaline electrolyte and a hydrogen absorption alloy which are the main ingredients. This hydrogen absorption alloy has the composition of a formula I, where M is rare earth metal, and the quantity of Ni, Co, Mn, Fe, Al other than the rare earth metal is expressed at atomic percentage to a 1 gram atom of M each with x, y, z, v and w, and each of them contains numerical value in the range of a formula II. In the hydrogen absorption alloy like this, a good characteristic in regard to sufficient hydrogen absorption quantity, a low balanced platear pressure and chemical stability in an electrolyte is securable, so that the cell composed of this alloy as a negative material is large in capacity and long in service life and, what is more, it comes to such one that is excellent in safety and less in self- discharge.

2. 发明专利

JPS62264556A HYDROGEN BATTERY 失效
公开(公告)号：JPS62264556A
公开(公告)日：1987-11-17
申请号：JP10761586
申请日：1986-05-13
申请人： TOSHIBA CORP
发明人： MITSUYASU KIYOSHI , TSURUTA SHINJI , SATO YUJI , KANDA MOTOI , YAGASAKI ERIKO
IPC分类号： H01M4/62 , H01M4/24
摘要： PURPOSE:To improve capacity deterioration during storage of a battery by applying PVA or CMC onto a negative electrode. CONSTITUTION:Polyvinyl alcohol (PVA) or Na-carboxymethylcellulose (CMC) is applied onto a negative electrode. For applying PVA onto the negative electrode, PVA is dissolved in distilled water to prepare a PVA solution, and the negative electrode is immersed in the PVA solution, drawing out, then dried. Dissolving of hydrogen on the surface of hydrogen storage alloy into an electrolyte is retaded and capacity deterioration of a battery is decreased.

3. 发明专利

JPS62223990A SEALED STORAGE BATTERY USING HYDROGEN STORAGE ALLOY ELECTRODE 失效
公开(公告)号：JPS62223990A
公开(公告)日：1987-10-01
申请号：JP6587686
申请日：1986-03-26
申请人： TOSHIBA CORP
发明人： SATO YUJI , KANDA MOTOI , YAGASAKI ERIKO , SASAKI KUNIHIKO
IPC分类号： H01M4/62 , H01M4/38 , H01M10/24 , H01M10/34
摘要： PURPOSE:To increase the capacity of a battery by using a sheel-like negative electrode, also serving as a current collector, mainly comrising hydrogen storage alloy and using hydrogen as an active material and using a metal oxide as a positive electorde. CONSTITUTION:LaN4.7Al0.3 powder having a particle size of 20mum roless and polytetrafluoroethylene powder are uniformly mixed. The mixture is rolled in a sheet with a roller to form a hydrogen storage alloy electrode 2 serving as a negative electrode. A sintered nickel electrode 3 is prepared as a positive electrode. The positive electrode 3 and the negative electrode 2 are spirally wound with a nylon nonwoven fabric separator 4 interposed to form a unit cell. The unit cell is inserted into a battery case 1, and a positive lead 6 is welded to a positive terminal 5 of a sealing plate 8 by resistance welding. The negative electrode is closely pressed against the inner wall of the case 1 to obtain electrical contact. An 8N KOH electrolyte is poured in the case 1, and a battery is sealed. Thereby, the capacity of the battery is increased.

4. 发明专利

JPH10326614A METAL OXIDE-HYDROGEN BATTERY 失效
公开(公告)号：JPH10326614A
公开(公告)日：1998-12-08
申请号：JP16277198
申请日：1998-05-28
申请人： TOSHIBA CORP
发明人： YAGASAKI ERIKO , KANDA MOTOI , SATO YUJI , SASAKI KUNIHIKO
IPC分类号： H01M4/38 , H01M10/30
摘要： PROBLEM TO BE SOLVED: To provide a battery of large capacity, which has a long lifetime and is excellent in the safety, as rise of the internal pressure is precluded and risk of hydrogen leakage is lessened. SOLUTION: A metal oxide-hydrogen battery uses a metal oxide as a positive electrode active material and hydrogen as negative electrode active material, wherein a rare earth material in a hydrogen storage alloy as the main component of the negative electrode 1 contains Ce, La, Pr, Nd, and the Ce content is 0.1 wt.% or more of the total quantity of rare earth elements contained by the hydrogen storage alloy, and further at least two of the following conditions should be met, the ratio of La by wt. to Ce is 5.2 or more, that of Pr to Ce 1.4 or more, and that of Nd to Ce 3.6 or more.

5. 发明专利

JPS62264557A METAL OXIDE-HYDROGEN BATTERY 失效
公开(公告)号：JPS62264557A
公开(公告)日：1987-11-17
申请号：JP10761486
申请日：1986-05-13
申请人： TOSHIBA CORP
发明人： YAGASAKI ERIKO , TSURUTA SHINJI , SATO YUJI , KANDA MOTOI
IPC分类号： B01J23/83 , B01J23/84 , B01J23/889 , H01M4/24 , H01M4/38 , H01M4/62
摘要： PURPOSE:To obtain a metal oxide-hydrogen battery having high safety, low self discharge, large capacity, and long life by using hydrogen storage alloy powder having a specified ingredient and conductive powder having a specified particle size as a negative electrode material. CONSTITUTION:A negative electrode 1 is formed in such a way that a rare earth element hydrogen storage alloy MNixCoyMnzAlw containing two or more rare earth elements including 0.1-12wt% Cerium, conductive powder such as acetylene black having a mean particle size of 10mum or less, and a binder such as polytetrafluoroethylene are kneaded and molded to form a sheet, then two sheets are pressed on both sides of a nickel net. The negative electrode 2 is insulated with a 0.3 mm thick polypropylene nonwoven fabric, and positive electrode 3 made of nickel oxide are arranged on both sides of the negative electrode 2, and they are compressed with a holder made of acrylic resin, and immersed in a KOH electrolyte to form a battery.

6. 发明专利

JPH0794185A NICKEL HYDROGEN BATTERY 失效
公开(公告)号：JPH0794185A
公开(公告)日：1995-04-07
申请号：JP21833194
申请日：1994-08-22
申请人： TOSHIBA CORP
发明人： YAGASAKI ERIKO , KANDA MOTOI , SATO YUJI , SASAKI KUNIHIKO
IPC分类号： H01M10/30 , H01M4/38
摘要： PURPOSE:To provide a battery with high capacity, long life, and high safety by using a negative electrode mainly comprising hydrogen storage alloy powder with a specific composition and a specific mean particle size and containing polytetrafluoroethylene, and an alkaline electrolyte containing a potassium hydroxide aqueous solution. CONSTITUTION:A negative electrode 1 consists mainly of hydrogen storage alloy powder having a composition represented by a general formula of MAxByCz and a mean particle size of 2-100mum and contains polytetrafluoroethylene. An alkaline electrolyte 7 contains a potassium hydroxide aqueous solution. In the formula, M is a rare earth ingredient comprising at least two rare earth elements, A is Ni and Co, B is at least one element selected from Cu, Fe, Mn, and C is at least one element selected from Al, Cr, Si, Ti, V, and Sn, and x, y, and z show an atomic ratio to one gram atom of the rare earth ingredient M, and 2.0

7. 发明专利

JPS63110552A HYDROGEN ABSORBING ALLOY ELECTRODE 失效
公开(公告)号：JPS63110552A
公开(公告)日：1988-05-16
申请号：JP25514586
申请日：1986-10-27
申请人： TOSHIBA CORP
发明人： SATO YUJI , MITSUYASU KIYOSHI , YAGASAKI ERIKO , KANDA MOTOI
IPC分类号： H01M4/24 , H01M4/62
摘要： PURPOSE:To decrease electrical resistivity and to enlarge mechanical strength and to increase discharge capacity and to obtain a long life by mutually bonding hydrogen absorbing metallic powder and carbon fiber, both of which serve as main constituents of electrode formation materials, by the use of an electrolytic solution-resisting granular bonding agent and making this mixture be united with an electrolysisresisting electrode supporter. CONSTITUTION:Hydrogen absorbing metallic powder and carbon fiber, both of which serve as main constituents of an electrode formation material, are mutually bonded by the use of an electrolytic solution-resisting granular bonding agent, and its mixture is united with an electrolysisresisting electrode supporter. Carbon fiber of at least 20 mum or less in diameter and 0.13 mum to 3.0 mum in length is desirable. That reasons are as follows: When the diameter of carbon fiber is in excess of 20 mum, a specific surface area decreases and a degree of its contact to hydrogen absorbing alloy powder becomes small and in its turn a decrease in conductivity may be caused. When the length of carbon fiber is less than 0.13 mm, the carbon fiber is too small to form three-dimensional chain structure. When this length is in excess of 3.0 mm, it becomes hard to obtain the uniform mixture and besides the carbon fiber is in danger of being cut in the mixing operation.

8. 发明专利

JPS62291862A ENCLOSED NICKEL-HYDROGEN STORAGE BATTERY 失效
公开(公告)号：JPS62291862A
公开(公告)日：1987-12-18
申请号：JP13459186
申请日：1986-06-10
申请人： TOSHIBA CORP
发明人： SASAKI KUNIHIKO , KANDA MOTOI , YAGASAKI ERIKO , SATO YUJI
IPC分类号： H01M4/38 , H01M4/24 , H01M4/62 , H01M10/28 , H01M10/34
摘要： PURPOSE:To prolong a battery life and prevent rise in battery inner pressure, by closely jointing a negative electrode, in which hydrogen absorbing alloy powder, catalyst, bonding agent are contained, with positive electrode of nickel oxide, and housing these electrodes in a container, and filling with an electrolytic solution, and enclosing the container. CONSTITUTION:A hydrogen absorbing alloy, a catalyst, and a binder are respectively mixed in the weight ratio of 94:2:4. This mixture is molded into a sheet by using a roller, and then this sheet is cut in a fixed dimension. A nickel net having a lead part serving as a collector is first attached to the one side of this sheet mold by using a press, to manufactire a hydrogen absorbing alloy negative electrode. A sintered nickel pole, on the other hand, is prepared as a nickel positive electrode. The hydrogen absorbing alloy negative electrode and the nickel positive electrode are spirally wound with a separator interposed, to manufacture an electrode group. This electrode group is housed in a container made of acryl, and the container is filled with an electrolytic solution and be enclosed. The hydrogen absorbing alloy in the electrolytic solution is prevented from being oxidized to prolong a battery life, and besides a rise in battery inner pressure, caused by generation of oxygen and hydrogen in the battery, can be prevented.

9. 发明专利

JPS62223971A METAL OXIDE-HYDROGEN BATTERY 失效
公开(公告)号：JPS62223971A
公开(公告)日：1987-10-01
申请号：JP6587786
申请日：1986-03-26
申请人： TOSHIBA CORP
发明人： YAGASAKI ERIKO , KANDA MOTOI , SATO YUJI , SASAKI KUNIHIKO
IPC分类号： B01J23/83 , B01J23/84 , B01J23/889 , H01M4/38 , H01M4/62
摘要： PURPOSE:To prevent increase in internal pressure and hydrogen leakage and to obtain large capacity and long life by specifying the content of Ce in a rare earth group hydrogen storage alloy constituting a negative electrode. CONSTITUTION:A negative electrode is made of a rare earth group hydrogen storage alloy comprising two or more rare earth elements containing Ce. The content of Ce is specified to 0.1-12wt% based on the total amount of rare earth elements. By especially specifying the content of Ce to 0.1-8wt%, the life of a battery is moreover increased. The formula 1 shows preferable ingredient of the rare earth hydrogen storage alloy for the negative electrode.

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