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1
US20050221179A1
Publication/Patent Number: US20050221179A1
Publication date: 2005-10-06
Application number: 11/088,251
Filing date: 2005-03-23
Abstract: A mixed nickel hydroxide cathode material for use in alkaline storage batteries and having a bimodal particle size distribution includes a main population of particles and a secondary population of particles. The main population has a median mass-based particle size distribution value, derived from laser particle analyses, of between 5 μm and 25 μm. The secondary population has a median mass-based particle size distribution value, derived from laser particle analyses, of between 0.3 μm and 3 μm. The main population is present in the mixed nickel hydroxide cathode material in a proportion of between 70% and 96% by mass. A mixed nickel hydroxide cathode material for use in alkaline storage batteries and having a bimodal particle size distribution includes a main population of particles and a secondary population of particles. The main population has a median mass-based particle size distribution ...more ...less
2
US20050287438A1
Publication/Patent Number: US20050287438A1
Publication date: 2005-12-29
Application number: 11/159,226
Filing date: 2005-06-23
Assignee: SAFT
Abstract: The invention relates to an alkaline electrochemical cell of improved lifetime, including at least one compound based on barium or strontium, said compound being present in the cell with the exception of the cathode. The invention also provides a method of fabricating such a cell. The invention relates to an alkaline electrochemical cell of improved lifetime, including at least one compound based on barium or strontium, said compound being present in the cell with the exception of the cathode. The invention also provides a method of fabricating such a ...more ...less
3
US20050019658A1
Publication/Patent Number: US20050019658A1
Publication date: 2005-01-27
Application number: 10/500,899
Filing date: 2003-01-29
Abstract: An alkaline battery comprising: a positive electrode mixture comprising manganese dioxide and nickel oxyhydroxide as active materials; a negative electrode comprising zinc as an active material; and an alkaline electrolyte, characterized in that the potential of the manganese dioxide relative to a mercury/mercury oxide electrode in a potassium hydroxide aqueous solution having a KOH concentration of 40 wt % is 270 mV or higher. An alkaline battery comprising: a positive electrode mixture comprising manganese dioxide and nickel oxyhydroxide as active materials; a negative electrode comprising zinc as an active material; and an alkaline electrolyte, characterized in that the potential of the manganese ...more ...less
4
US20050008936A1
Publication/Patent Number: US20050008936A1
Publication date: 2005-01-13
Application number: 10/825,147
Filing date: 2004-04-15
Abstract: The present invention provides an alkaline battery suitable for use as a primary or secondary battery as a power source of electronic appliances. The battery is excellent in discharge characteristics under a heavy load and in cycle characteristics. The alkaline battery (100) comprises a cathode mix (3) containing β-nickel oxy-hydroxide, an anode mix (5) containing zinc as a main component of anode active material, and an alkali solution as an electrolyte, wherein the cathode mix (3) includes a mixture of β-nickel oxy-hydroxide, graphite powder, and a potassium hydroxide solution in a given weight ratio. The β-nickel oxy-hydroxide is prepared by chemical oxidation and has an approximately spherical shape of particle with a mean particle size in the range of 5 to 50 μm. The present invention provides an alkaline battery suitable for use as a primary or secondary battery as a power source of electronic appliances. The battery is excellent in discharge characteristics under a heavy load and in cycle characteristics. The alkaline battery (100) ...more ...less
5
US20050238960A1
Publication/Patent Number: US20050238960A1
Publication date: 2005-10-27
Application number: 10/995,149
Filing date: 2004-11-24
Abstract: The present invention provides a non-sintered type positive electrode for alkaline storage battery whose drop out of active material powder is suppressed while maintaining favorable charging-discharging properties such as utilization factor. A non-sintered type positive electrode constituted by an electrically conductive support, a nickel hydroxide powder coated by cobalt oxyhydroxide (COH), an additive made of COH powder, and a binder, in which the average particle size of the nickel hydroxide powder coated by COH is greater than that of the additive made of COH powder. The present invention provides a non-sintered type positive electrode for alkaline storage battery whose drop out of active material powder is suppressed while maintaining favorable charging-discharging properties such as utilization factor. A non-sintered type positive ...more ...less
6
US20050053837A1
Publication/Patent Number: US20050053837A1
Publication date: 2005-03-10
Application number: 10/938,546
Filing date: 2004-09-13
Abstract: A nickel electrode for an alkaline storage battery in which an active material mainly containing nickel hydroxide is applied to a porous sintered nickel substrate, wherein a layer containing at least one hydroxide of an element selected from a group consisting of Ca, Sr, Sc, Y, lanthanoid, and Bi is formed on a surface of the active material thus applied to the sintered nickel substrate, or between the sintered nickel substrate and the active material. A nickel electrode for an alkaline storage battery in which an active material mainly containing nickel hydroxide is applied to a porous sintered nickel substrate, wherein a layer containing at least one hydroxide of an element selected from a group consisting of Ca, Sr, Sc, Y ...more ...less
7
US20040219427A1
Publication/Patent Number: US20040219427A1
Publication date: 2004-11-04
Application number: 10/774,614
Filing date: 2004-07-07
Assignee: ALCATEL
Abstract: The subject of the present invention is a non-sintered electrode containing a two-dimensional conductive support covered by a layer containing an electrochemically active material and a binder which is a mixture of a styrene-acrylate copolymer and a cellulose compound chosen from methylcellulose, carboxymethylcellulose, hydroxypropylmethylcellulose, hydroxypropylcellulose and hydroxyethylcellulose. The proportion of the styrene-acrylate copolymer is less than 4% by weight of the active layer. The subject of the present invention is a non-sintered electrode containing a two-dimensional conductive support covered by a layer containing an electrochemically active material and a binder which is a mixture of a styrene-acrylate copolymer and a cellulose compound chosen ...more ...less
8
US20040265689A1
Publication/Patent Number: US20040265689A1
Publication date: 2004-12-30
Application number: 10/606,928
Filing date: 2003-06-27
Abstract: With an alkaline storage battery according to the invention, a coating layer of a cobalt compound is provided on the surface a cathode active material composed mainly of nickel hydroxide, and at least one species of compound selected from the group consisting of a niobium compound, titanium compound, tungsten compound and molybdenum compound is added to the coating layer of the cobalt compound while an alkaline electrolytic solution contains lithium hydroxide, and a lithium hydroxide content is not less than 0.6 mol/L and not more than 1.6 mol/L. As a result, dissolution of the niobium compound, titanium compound, tungsten compound and molybdenum compound, in the alkaline electrolytic solution, can be inhibited and it becomes possible to maintain an excellent electrically conductive network. Consequently, even if recharge/discharge operations are repeated in a high-temperature atmosphere, it is possible to prevent deterioration of conductivity. Hence, an alkaline storage battery excellent in high-temperature cycle life can be provided. With an alkaline storage battery according to the invention, a coating layer of a cobalt compound is provided on the surface a cathode active material composed mainly of nickel hydroxide, and at least one species of compound selected from the group consisting of a niobium ...more ...less
9
US20040265692A1
Publication/Patent Number: US20040265692A1
Publication date: 2004-12-30
Application number: 10/601,881
Filing date: 2003-06-24
Abstract: An electrode for use in energy storage comprising a nanostructured mesoporous electrically conductive metal oxide and an ultrathin, conformal polymer coating on the metal oxide wherein said electrode has a mesoporous structure. Also disclosed is the related method for making an electrode for use in energy storage. An electrode for use in energy storage comprising a nanostructured mesoporous electrically conductive metal oxide and an ultrathin, conformal polymer coating on the metal oxide wherein said electrode has a mesoporous structure. Also disclosed is the related method for making an ...more ...less
10
US20040202932A1
Publication/Patent Number: US20040202932A1
Publication date: 2004-10-14
Application number: 10/265,432
Filing date: 2002-10-07
Inventor: Bernard, Patrick  
Assignee: ALCATEL
Abstract: The invention concerns an electrochemically active material for a positive electrode of an alkaline electrolyte secondary cell, constituted by monophase particles of a hydroxide of &agr; type crystallographic structure principally constituted by nickel, characterized in that the bulk density of said hydroxide is 1.75 g/cm3 or more. Preferably, the nickel hydroxide contains at least one co-crystallized element selected from cobalt and manganese. Also preferably, it contains at least one co-crystallized element selected from aluminum, iron, yttrium, manganese, and chromium. The present invention also concerns a positive electrode for an alkaline electrolyte secondary cell containing this electrochemically active material. The present invention also concerns a method of producing said active material. The invention concerns an electrochemically active material for a positive electrode of an alkaline electrolyte secondary cell, constituted by monophase particles of a hydroxide of &agr; type crystallographic structure principally constituted by nickel, characterized in that the ...more ...less
11
US20040209166A1
Publication/Patent Number: US20040209166A1
Publication date: 2004-10-21
Application number: 10/720,700
Filing date: 2003-11-25
Inventor: Kihara, Masaru  
Abstract: A nickel-hydrogen secondary battery comprises a positive electrode (10) and a negative electrode (12) opposite each other with a separator (18) between, and contained in a container (14) with an alkaline electrolyte. The positive electrode (10) contains nickel hydroxide and at least one element selected from a group consisting of Y, Yb, Er, Ca, Sr, Ba, Nb, Ti, W, Mo and Ta. The negative electrode (12) contains a hydrogen-absorbing alloy having composition represented by a general formula Ln1-xMgx(Ni1-yTy)s, where Ln is at least one element selected from a group consisting of the lanthanoids, Ca, Sr, Sc, Y, Ti, Zr and Hf, T is at least one element selected from a group consisting of V, Nb, Ta, Cr, Mo, Mn, Fe, Co, Al, Ga, Zn, Sn, In, Cu, Si, P and B, and x, y and z are numerical values satisfying the requirements 0<x<1, O&lE;y&lE;0.5, and 2.5&lE;z&lE;4.5, respectively. A nickel-hydrogen secondary battery comprises a positive electrode (10) and a negative electrode (12) opposite each other with a separator (18) between, and contained in a container (14) with an alkaline electrolyte. The positive electrode (10) contains nickel hydroxide and at ...more ...less
12
US20040115531A1
Publication/Patent Number: US20040115531A1
Publication date: 2004-06-17
Application number: 10/469,472
Filing date: 2004-01-08
Abstract: An alkaline primary cell which is improved in reduction of self-discharge and cell capacity under storage at a high temperature, has a prolonged life and makes use of nickel oxyhydroxide is provided inexpensively. &bgr;-Form nickel oxyhydroxide is contained in a positive electrode mixture as an active material, which contains cobalt and zinc as a substitutional element for solid solution, and has a total amount X&plus;Y of molar ratios of cobalt atom X and zinc atom Y such that 2&lE;X&plus;Y&lE;16, with a mixing ratio satisfying the relationship of Y&lE;3/2×X&plus;1/2 and Y&gE;2/3×X−1/3, and where a diffraction peak obtained as a result of measurement of X-ray powder diffraction of nickel oxyhydroxide appears only in the vicinity of 18.5° within a range of 2&thgr;&equals;10°-30°. This positive electrode mixture is formed as a molding (2) of a hollow cylinder and inserted into a positive electrode can (4), and a negative electrode active material (8) is placed at the central portion thereof with a separator put between it and the molding, to constitute an inside out type cell. An alkaline primary cell which is improved in reduction of self-discharge and cell capacity under storage at a high temperature, has a prolonged life and makes use of nickel oxyhydroxide is provided inexpensively. &bgr;-Form nickel oxyhydroxide is contained in a positive ...more ...less
13
US20040248006A1
Publication/Patent Number: US20040248006A1
Publication date: 2004-12-09
Application number: 10/489,788
Filing date: 2004-03-16
Abstract: Electrically conductive filler such as carbon fibers, carbon particles, Ni fibers, Ni particles, Ni foil, Ni-plated fibers, or Ni-plated particles is added to an active material powder such as nickel hydroxide, which is formed into active material products. The active material is cured by using alkali-resistant resin. Thus, particulate active material for use in a three-dimensional battery is produced. Electrically conductive filler such as carbon fibers, carbon particles, Ni fibers, Ni particles, Ni foil, Ni-plated fibers, or Ni-plated particles is added to an active material powder such as nickel hydroxide, which is formed into active material products. The active material ...more ...less
14
US20040202931A1
Publication/Patent Number: US20040202931A1
Publication date: 2004-10-14
Application number: 10/086,807
Filing date: 2002-03-04
Abstract: Nickel oxyhydroxide can be prepared by exposing a mixture of a nickel hydroxide and a hydroxide salt to ozone. The nickel oxyhydroxide is suitable for use in the cathode of a battery.
15
US20040086779A1
Publication/Patent Number: US20040086779A1
Publication date: 2004-05-06
Application number: 10/693,789
Filing date: 2003-10-24
Abstract: A rechargeable multi-cell battery including a plurality of electrochemical cells. Each of the cells includes a gas port that allows passage of cell gases into and out of the cell but prevent passage of cell electrolyte out of the cell. The gas port may be a gas permeable membrane. The multi-cell batter may be a bipolar battery. A rechargeable multi-cell battery including a plurality of electrochemical cells. Each of the cells includes a gas port that allows passage of cell gases into and out of the cell but prevent passage of cell electrolyte out of the cell. The gas port may be a gas permeable ...more ...less
16
US20040248007A1
Publication/Patent Number: US20040248007A1
Publication date: 2004-12-09
Application number: 10/865,567
Filing date: 2004-06-08
Abstract: An alkaline battery is configured using a positive electrode for an alkaline battery containing a positive active material that contains nickel oxyhydroxide, wherein a surface of the nickel oxyhydroxide is covered with a cobalt compound, an electric potential of the nickel oxyhydroxide is in a range of 0.320 to 0.375 V with respect to a Hg/HgO reference electrode, and a content of the nickel oxyhydroxide is at least 35 wt % with respect to the positive active material. According to this configuration, an alkaline battery can be provided, which has excellent heavy-load discharging characteristics and storage characteristics at a high temperature, and has less degradation of characteristics. Furthermore, it is desirable to combine this positive electrode with a negative electrode containing minute zinc particles in at least a predetermined proportion. An alkaline battery is configured using a positive electrode for an alkaline battery containing a positive active material that contains nickel oxyhydroxide, wherein a surface of the nickel oxyhydroxide is covered with a cobalt compound, an electric potential of the nickel ...more ...less
17
US20040197656A1
Publication/Patent Number: US20040197656A1
Publication date: 2004-10-07
Application number: 10/831,899
Filing date: 2004-04-26
Abstract: A primary alkaline battery includes a cathode including a nickel oxyhydroxide and an anode including zinc or zinc alloy particles. Performance of the nickel oxyhydroxide alkaline cell is improved by adding zinc fines to the anode.
18
US20040101751A1
Publication/Patent Number: US20040101751A1
Publication date: 2004-05-27
Application number: 10/625,724
Filing date: 2003-07-24
Abstract: A nickel metal hydride storage battery which includes a positive electrode containing nickel hydroxide as a active material, a negative electrode containing a hydrogen absorbing alloy which contains aluminum, a separator and an alkaline electrolyte, wherein a complex-forming agent which forms a complex with aluminum is included in the negative electrode. A nickel metal hydride storage battery which includes a positive electrode containing nickel hydroxide as a active material, a negative electrode containing a hydrogen absorbing alloy which contains aluminum, a separator and an alkaline electrolyte, wherein a complex-forming ...more ...less
19
US20040002004A1
Publication/Patent Number: US20040002004A1
Publication date: 2004-01-01
Application number: 10/391,870
Filing date: 2003-03-19
Abstract: An active composition for fabricating positive electrodes, comprising a nickel hydroxide material, and a misch metal alloy. A nickel positive electrode and an electrochemical cell using this active composition.
20
US20030129491A1
Publication/Patent Number: US20030129491A1
Publication date: 2003-07-10
Application number: 10/321,397
Filing date: 2002-12-18
Abstract: A nickel-metal hydride storage battery which includes a positive electrode containing nickel hydroxide, a negative electrode containing a hydrogen absorbing alloy and an alkaline electrolyte, wherein the positive electrode contains a hydroxide and/or an oxide of an element selected from the group consisting of calcium, strontium, scandium, yttrium, lanthanoid and bismuth, and the negative electrode contains a hydroxide and/or an oxide of at least one element selected from the group consisting of scandium, yttrium and lanthanoid. A nickel-metal hydride storage battery which includes a positive electrode containing nickel hydroxide, a negative electrode containing a hydrogen absorbing alloy and an alkaline electrolyte, wherein the positive electrode contains a hydroxide and/or an oxide of an element ...more ...less