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Nickel hydroxides

Uses. Nickel nitrate is an intermediate in the manufacture of nickel catalysts, especially those that are sensitive to sulfur and therefore preclude the use of the less expensive nickel sulfate. Nickel nitrate also is an intermediate in loading active mass in nickel—alkaline batteries of the sintered plate type (see Batteries, SECONDARY cells). Typically, hot nickel nitrate symp is impregnated in the porous sintered nickel positive plates. Subsequendy, the plates are soaked in potassium hydroxide solution, whereupon nickel hydroxide [12054-48-7] precipitates within the pores of the plate. [Pg.10]

Nickel Hydroxides. Nickel hydroxide [12054-48-7], Ni(OH)2, is a light-green, microcrystaUine powder, density 4.15 g/cirr . It decomposes... [Pg.10]

When nickel hydroxide is oxidized at the nickel electrode in alkaline storage batteries the black trivalent gelatinous nickel hydroxide oxide [12026-04-9], Ni(0H)0, is formed. In nickel battery technology, nickel hydroxide oxide is known as the nickel active mass (see Batteries, secondary cells). Nickel hydroxide nitrate [56171-41-6], Ni(0H)N02, and nickel chloride hydroxide [25965-88-2], NiCl(OH), are frequently mentioned as intermediates for the production of nickel powder in aqueous solution. The binding energies for these compounds have been studied (55). [Pg.10]

Nickel Salts and Chelates. Nickel salts of simple organic acids can be prepared by reaction of the organic acid and nickel carbonate of nickel hydroxide reaction of the acid and a water solution of a simple nickel salt and, in some cases, reaction of the acid and fine nickel powder or black nickel oxide. [Pg.13]

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]

Electrodes. A number of different types of nickel oxide electrodes have been used. The term nickel oxide is common usage for the active materials that are actually hydrated hydroxides at nickel oxidation state 2+, in the discharged condition, and nickel oxide hydroxide [12026-04-9] NiO OH, nickel oxidation state 3+, in the charged condition. Nickelous hydroxide [12034-48-7J, Ni(OH)2, can be precipitated from acidic solutions of bivalent nickel... [Pg.544]

The other type of nickel electrode involves constmctions in which the active material is deposited in situ. This includes the sintered-type electrode in which nickel hydroxide is chemically or electrochemically deposited in the pores of a 80—90% porous sintered nickel substrate that may also contain a reinforcing grid. [Pg.544]

Almost all the methods described for the nickel electrode have been used to fabricate cadmium electrodes. However, because cadmium, cadmium oxide [1306-19-0], CdO, and cadmium hydroxide [21041-95-2], Cd(OH)2, are more electrically conductive than the nickel hydroxides, it is possible to make simple pressed cadmium electrodes using less substrate (see Cadmium and cadmium alloys Cadmium compounds). These are commonly used in button cells. [Pg.544]

Fig. 2. Nickel hydroxide structure where ( ) represents nickel and (O) represents oxygen or hydroxyl. Fig. 2. Nickel hydroxide structure where ( ) represents nickel and (O) represents oxygen or hydroxyl.
The nickel oxide modification obtained electrochemicaHy in KOH electrolyte contained potassium ion and its nickel oxidation level are higher than that of NiO 5. Conclusions regarding the transitions between the reduced and oxidized products within the two series are that the redox process was not reversible and although the oxidized phases of the P- and the y-nickel hydroxides differ in energy contents, differences in analyses and x-ray patterns are not significant. [Pg.545]

The process by which porous sintered plaques are filled with active material is called impregnation. The plaques are submerged in an aqueous solution, which is sometimes a hot melt in a compound s own water of hydration, consisting of a suitable nickel or cadmium salt and subjected to a chemical, electrochemical, or thermal process to precipitate nickel hydroxide or cadmium hydroxide. The electrochemical (46) and general (47) methods of impregnating nickel plaques have been reviewed. [Pg.548]

H. Bode, K. Behmelt, and]. Witte, Crystal Structures of Nickel Hydroxides, ClTCE Meeting, Strashourg, France, 1965. [Pg.568]

Nickel-hydroxyd, n. nickel hydroxide, -hy-droxydul, n. nickelous hydroxide, nickel(II) hydroxide. [Pg.318]

Jfickeloxydul, n. nickelous oxide, nickel(II) oxide, NiO. -hydrat, n, nickelous hydroxide, nickel (II) hydroxide, -salz, n. nickelous salt, nickel(II) salt, -verbindung,/. nickelous compound, nickel(II) compound. Nickelpapier, n. nickel foil, nickelplattiert, a. nickel-plated. [Pg.319]

Neutron-to-proton ratio, 29-30 Newton, 457,635 Newton, Isaac, 136 Nickel hydroxide, 78 Nicotinic acid, 364-365 NIMBY syndrome, 526 Nitric acid acid rain and, 400 acid strength of, 567 commercial use, 76 copper penny dissolving in, 570 production, 570-571... [Pg.692]

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]

Figure 12. Nickel hydroxide particles for active materials. Figure 12. Nickel hydroxide particles for active materials.
Lithium-nickel oxides form various lithium compounds, lithium hydroxides (LiOH), Li2C03, nickel hydroxide (Ni(OH)2), nickel carbonate (NiC03) and nickel oxide (NiO). Figure 51 shows the discharge characteristics of lithium-nickel oxides synthesized from these compounds. They were heat-treated at 850 °C for 20 h in air. Although the lithium nickel oxides showed a smaller discharge capacity than that of LiCo02, LiOH and Ni(OH)2 were considered to be appropi-ate raw materials. [Pg.49]

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]

This section gives a brief overview of the structure of nickel hydroxide battery electrodes and a more detailed review of the solid-state chemistry and electrochemistry of the electrode materials. Emphasis is on work done since 1989. [Pg.136]


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Additives nickel hydroxides

Characteristics nickel metal hydroxide

Characteristics sodium nickel hydroxide

Charge nickel hydroxides

Coprecipitation mixed nickel hydroxides

Corrosion nickel hydroxides

Crystallography and mineralogy of nickel hydroxide

Cycles, nickel hydroxides

Electrochemical reactions, nickel hydroxide

Electrodes nickel hydroxides

Foams, nickel hydroxide electrodes

Hydrous nickel oxides 1-hydroxide

Hydroxide nickel particles

Iron hydroxides nickel compounds using

James McBreen 2 Nickel Hydroxide Battery Electrodes

Layers nickel hydroxides

Mats, nickel hydroxide electrodes

Metal salts Nickel hydroxide

Multiphase Nano-Nickel Hydroxide

Nickel II) hydroxide

Nickel III) hydroxide

Nickel alloys hydroxide

Nickel hydroxide experimental method

Nickel hydroxide modeling

Nickel hydroxide monohydrate

Nickel hydroxide positive electrode

Nickel hydroxide solution, measurement

Nickel hydroxide, dehydration

Nickel hydroxide, layered

Nickel hydroxide, solubility

Nickel metal hydroxide

Nickel metal hydroxide secondary

Nickel oxide/hydroxide

Nickel oxide/hydroxide catalysts

Nickel oxides and hydroxides

Nickelic hydroxide paste

Nickelous hydroxide

Nickelous hydroxide

Nickelous hydroxide oxide

Oxygen nickel hydroxides

Pyroaurite type nickel hydroxides

Self nickel hydroxides

Solid State Chemistry of Nickel Hydroxides

Solid-state chemistry, nickel hydroxides

Zinc additives, nickel hydroxides

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