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Method of cladding hydroxy cobalt oxide on spherical nickel hydroxide surface

A technology of spherical nickel hydroxide and hydroxyl coated on the surface, which is applied in the direction of nickel oxide/nickel hydroxide, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of uneven oxidation and complicated process, and achieve simple process and good electrical conductivity Strong, coated and homogeneous oxide layer effect

Active Publication Date: 2006-06-28
HENAN KELONG NEW ENERGY CO LTD
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Problems solved by technology

The disadvantage is that the oxidation is uneven and the process is more complicated.

Method used

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Embodiment 1

[0007] Take by weighing 8 kilograms of cobalt sulfate and dissolve it in 8 kilograms of deionized water to make a cobalt sulfate solution, then prepare a sodium hydroxide solution with a concentration of 4 mol / liter and ammoniacal liquor with a concentration of 8 mol / liter, and add it to a capacity of 1000 liters After adding 500 kg of deionized water into the reaction kettle, the bulk density is 1.72 g / cm 3 50 kilograms of spherical nickel hydroxide, under stirring, three kinds of solutions are added into the reaction kettle simultaneously with a metering pump, and the flow rate of the cobalt sulfate solution is kept at 5 liters / hour, and the flow rate of the sodium hydroxide solution and ammonia water is adjusted to control the pH The value is 10.5±0.05, and the temperature is controlled at 55±2°C. If the cobalt sulfate solution is fed, continue to add sodium hydroxide solution to increase the pH value to 12.5, and the temperature rises to 85±1°C, then add 1 kg of sodium hyp...

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Abstract

This invention relates to a method for covering alkyl Co2O on the surface of Ni(OH)2 including: 1, stocking: preparing Co2SO4: 0.5-2mol / L, NaOH solution:3-8mol / L, ammonia:6-10mol / L, 2, adding one portion of ball Ni(OH)2 in a reaction kettle with 6-12 portions of deionized water in it already to be mixed and control the temperature at 30-70deg.C, then adding 1 of Co2SO4 solution, 2-2.5 of NaOH solution and 0.8-1.5 ammonia in a reaction kettle to be reacted for 3-8 hours with the PH value at 10-11, then stopping feeding in the Co2SO4 solution and adding NaOH solution so that the PH value rises to 12-13.6, then adding chloros in 1-5% weight of Ni(OH)2 after the temperature rises to 80-90deg.C to be mixed for 30-60 minutes, 3, carrying out separation of the solid and liquid to be dried.

Description

technical field [0001] The invention relates to a device for directly converting chemical energy into electric energy, in particular to a method for coating cobalt oxyhydroxide on the surface of spherical nickel hydroxide. Background technique [0002] Spherical nickel hydroxide is the positive electrode active material of alkaline nickel metal hydride batteries. Since nickel hydroxide itself is a kind of semiconductor, a certain conductive agent must be added when making the plate, or a layer of cobalt compound must be coated on the surface to greatly improve the performance. Conductivity of the positive electrode. At present, the method for coating cobalt oxyhydroxide on the surface of spherical nickel hydroxide is to first coat a layer of cobaltous hydroxide on the surface of spherical nickel hydroxide, then wash, dry and then oxidize. The disadvantage is that the oxidation is uneven and the process is more complicated. Contents of the invention [0003] The object of...

Claims

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Application Information

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IPC IPC(8): H01M4/26B22F1/02C01G51/00C01G53/04H01M4/52H01M4/62
CPCY02E60/10
Inventor 尹正中徐拥军
Owner HENAN KELONG NEW ENERGY CO LTD
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