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Nickel hydroxide positive electrode

Ni-MH cell — A -> secondary battery (-> accumulator) containing a nickel hydroxide positive electrode, a metal hydride negative electrode, and a strongly alkaline aqueous electrolyte solution. The electrode reactions are... [Pg.449]

Alkaline storage batteries with a nickel hydroxide positive electrode were developed with three different negative electrodes, containing cadmium, iron, or a metal hydride... [Pg.20]

The Alkaline Storage Battery.—The alkaline or Edison battery is made up of an iron (negative) and a nickel sesquioxide (positive) electrode in potassium hydroxide solution it may be represented as... [Pg.302]

Nickel metal hydride cell containing a nickel hydroxide positive and a hydrogen-absorbing metal alloy negative electrode. [Pg.423]

Nickel-based positive electrode made of 3 to 95 wt% NiOH balance consists of either nickel powder, cobalt powder, or carbon powder, possibly in combination. Carbon-based negative electrode made of 10 to 95 wt% carbon, with balance consisting of at least one metal oxide from group of bismuth oxide, iridium oxide, cobalt oxide, iron oxide, and iron hydroxide, and hydride from Groups IIIA, IIIB, IVA, IVB, VB, VIB, VIIB,andVIIIB. [Pg.231]

There are many methods of fabricating the electrodes for these cell systems. The eadiest commercially successhil developments used nickel hydroxide [12054-48-7] Ni(OH)2, positive electrodes. These electrodes are commonly called nickel electrodes, disregarding the actual chemical composition. Alkaline cells using the copper oxide—2inc couple preceeded nickel batteries but the CuO system never functioned well as a secondary battery. It was, however, commercially available for many years as a primary battery (see BatterieS-PRIMARY cells). [Pg.543]

The nickel-cadmium battery was invented by Jungner in 1899. The battery used nickel hydroxide for the positive electrode, cadmium hydroxide for the negative electrode, and an alkaline solution for the electrolyte. Jungner s nickel-cadmium battery has undergone various forms of the development using improved materials and manufacturing processes to achieve a superior level of performance. [Pg.23]

Nickel hydroxides have been used as the active material in the positive electrodes of several alkaline batteries for over century [1], These materials continue to attract much attention because of the commercial importance of nickel-cadmium and nickel-metal hydride batteries. In addition to being the cathode active material in nickel-metal hydride batteries, Ni(OH)2 is an important corrosion product of the anode during cycling. There are several reviews of work in the field [2-10],... [Pg.135]

In acidic electrolytes only lead, because it forms passive layers on the active surfaces, has proven sufficiently chemically stable to produce durable storage batteries. In contrast, in alkaline medium there are several substances basically suitable as electrode materials nickel hydroxide, silver oxide, and manganese dioxide as positive active materials may be combined with zinc, cadmium, iron, or metal hydrides. In each case potassium hydroxide is the electrolyte, at a concentration — depending on battery systems and application — in the range of 1.15 - 1,45 gem"3. Several elec-... [Pg.281]

For alkaline storage batteries requirements are often demanded exceeding by far those for lead storage batteries. The reason is that the suitable materials for the positive electrode are very expensive (silver oxide, nickel hydroxide) and thus the use of these storage batteries is only justified where requirements as to weight, number of cycles, or temperature range prohibit other solutions. Besides a few standardized versions — mainly for nickel-cadmium batteries — this has led to the existence of a large diversity of constructions for special applications [4-6, 108, 109],... [Pg.282]

Electrochemical Processes The charged positive electrodes of these batteries contain NiOOH, an oxide hydroxide of trivalent nickel, and the negative electrodes contain metallic cadmium or iron (M). As a rule, KOH solution serves as the electrolyte. The main current-producing reactions on the electrodes and in the cell in general can be written as... [Pg.354]

The processes taking place on the positive electrode actually are more comph-cated. Several modifications of nickel oxides exist which in particular differ in their degrees of hydration, so the equations above do not correctly describe the water balance in the reaction. The hydroxide of divalent nickel is formed as p-Ni(OH)2 and... [Pg.354]

Z.S. Wronski, G.J.C. Carpenter, P. Kalal, An integrated characterization approach for ranking nickel hydroxides designed for high-performance positive electrodes in batteries for electric vehicles, Electrochem. Soc. Proc. 96-14 (1996) 177-188 (Exploratory R D of Batteries for Electric and Hybrid Vehicles, A.R. Langrebe and B. Serosati, eds.)... [Pg.80]

However, it can undergo self-reductive dissolution (loss of active material) accompanied by oxygen evolution [349]. The active material of the positive electrode (in pocket plate cells) consists of nickel hydroxide mixed with small additions of cobalt and barium hydroxides to improve the capacity and charging/discharging performance and graphite to improve conductivity [348]. [Pg.791]

A nickel surface in contact with an alkaline solution is spontaneously covered with nickel hydroxide Hereby a-nickel hydroxide is formed which on aging is converted to the p-form At about 0.63 V (NHE) a-nickel hydroxide is oxidized to y-nickel oxide hydroxide. At a 80 mV more positive potential the P-form is transformed to p-nickel oxide hydroxide In the cathodic scan nickel oxide hydroxide is reversibly reduced to nickel hydroxide at about 0.54 V. In multiple scan cyclovoltammetry the current increases with each scan indicating an increase of the active electrode surface. [Pg.105]

The first patent on an alkaline secondary battery was taken out by Walde-mar Jungner of Sweden, who in 1899 proposed a system based on nickel hydroxide as the positive electroactive material, a mixture of cadmium and iron as the negative electrode, and an aqueous solution of potassium... [Pg.162]

Edison cell — A nickel-iron (Ni-Fe) secondary (rechargeable) cell independently developed by Edison in USA and W. Jiinger in Sweden in 1900. The cell (-> battery) is based on the use of nickel oxyhydroxide (NiOOH) at the positive electrode and metallic iron for the negative electrode, and a potassium hydroxide (KOH) solution containing lithium hydroxide (LiOH) is the electrolyte. The Ni-Fe cell is represented as ( Fe/KOH/NiOOH. The charge-discharge reactions for the Edison (Ni-Fe) cell are as follows ... [Pg.180]

Ni-Cd cells — The nickel-cadmium cell is a secondary - battery that has a nominal cell potential of 1.20-1.25 V. The negative electrode comprises nickel hydroxide-nickel oxyhydroxide, the positive electrode is cadmium, and the electrolyte solution is based on aqueous potassium hydroxide (KOH, 32% in water). At the anode, the discharge reaction is the oxidation of cadmium metal to cadmium hydroxide with the release of two electrons [i] ... [Pg.447]

Nickel-cadmium batteries use a hydrate nickel oxide as positive electrode, a metallic cadmium as negative electrode and an aqueous solution of potassium hydroxide as electrolyte [17]. The production of electrons at the negative plate during discharge occurs via the following semi-reaction ... [Pg.148]


See other pages where Nickel hydroxide positive electrode is mentioned: [Pg.549]    [Pg.1362]    [Pg.881]    [Pg.899]    [Pg.134]    [Pg.459]    [Pg.549]    [Pg.1362]    [Pg.881]    [Pg.899]    [Pg.134]    [Pg.459]    [Pg.10]    [Pg.542]    [Pg.543]    [Pg.546]    [Pg.23]    [Pg.146]    [Pg.282]    [Pg.48]    [Pg.27]    [Pg.171]    [Pg.185]    [Pg.48]    [Pg.123]    [Pg.148]    [Pg.398]    [Pg.542]    [Pg.543]    [Pg.546]   
See also in sourсe #XX -- [ Pg.459 ]




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