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Drying method and device for spherical nickelous hydroxide with surface wrapped with cobaltous hydroxide

A technology of spherical nickel hydroxide and cobalt hydroxide, which is applied in the direction of drying gas arrangement, drying solid materials, heating to dry solid materials, etc., can solve the problems of poor reversibility, poor conductivity, and low utilization rate of active materials, and achieve gas utilization High efficiency, low heating temperature, uniform color effect

Inactive Publication Date: 2019-01-01
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because doped spherical nickel hydroxide is a P-type semiconductor with poor conductivity, its reversibility is poor, and the utilization rate of active materials is not high.

Method used

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  • Drying method and device for spherical nickelous hydroxide with surface wrapped with cobaltous hydroxide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for drying spherical nickel hydroxide coated with cobalt hydroxide on the surface. When washing the spherical nickel hydroxide coated with cobalt hydroxide, add 0.1% VC to the washing water, filter after the washing is qualified, and filter the obtained surface coated The moisture content of spherical nickel hydroxide covered with cobalt hydroxide is 6%; the drying temperature is set at 80°C, and at the same time, nitrogen gas is introduced from the air supply port 9, and cooling water is introduced from the cooling water inlet 8 to the cooling pipe. When the heater outlet temperature reaches At the set 80°C, the spherical nickel hydroxide coated with cobalt hydroxide on the surface is added to the feeder 2 at a feeding rate of 150kg / h for drying, and the dried surface coated hydroxide is collected from the cyclone separator 4. The spherical nickel hydroxide product of cobalt, after testing, the moisture content of the dried product is 0.3%, and the surface colo...

Embodiment 2

[0030] A method for drying spherical nickel hydroxide coated with cobalt hydroxide on the surface. When washing the spherical nickel hydroxide coated with cobalt hydroxide, add 0.5% VC in the washing water, filter after the washing is qualified, and filter the obtained surface coated The moisture content of spherical nickel hydroxide covered with cobalt hydroxide is 9%; the drying temperature is set at 90°C, and at the same time, argon gas is introduced from the air inlet, and cooling water is introduced from the cooling water inlet to the cooling pipe. When the temperature at the outlet of the heater reaches At the set 90°C, the spherical nickel hydroxide coated with cobalt hydroxide on the surface is added to the feeder at a feeding rate of 200kg / h for drying, and the dried cobalt hydroxide coated on the surface is collected from the cyclone separator 4 Spherical nickel hydroxide product, after testing, the moisture content of the dried product is 1.0%, and the surface color ...

Embodiment 3

[0032] A method for drying spherical nickel hydroxide coated with cobalt hydroxide on the surface. When washing the spherical nickel hydroxide coated with cobalt hydroxide, add 0.3% VC in the washing water, filter after the washing is qualified, and filter the obtained surface coated The moisture content of spherical nickel hydroxide covered with cobalt hydroxide is 8%; the drying temperature is set at 86°C, and at the same time, argon gas is introduced from the gas supply port, and cooling water is introduced from the cooling water inlet to the cooling pipe. When the temperature at the outlet of the heater reaches At the set 86°C, the spherical nickel hydroxide coated with cobalt hydroxide on the surface is added to the feeder at a feed rate of 180kg / h for drying, and the dried cobalt hydroxide coated on the surface is collected from the cyclone separator 4 Spherical nickel hydroxide product, after testing, the moisture content of the dried product is 0.7%, and the surface col...

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Abstract

The invention discloses a drying method and device for spherical nickelous hydroxide with the surface wrapped with cobaltous hydroxide. The device comprises a heater, a heating pipe, a cyclone separator, a dust collector, an induced draft fan, a cooling pipe and the like; an air inlet of the heater is provided with an air replenishing opening, an outlet of the heater is provided with a temperatureprobe, and the heater and the temperature probe are subjected to linkage control through a PLC; during use, the heating temperature is set within the needed range, protective gas like nitrogen and argon is injected via the air replenishing opening, and the heated protective gas is recycled after being subjected to cooling and water separation; and when the spherical nickelous hydroxide with the surface wrapped with the cobaltous hydroxide is washed, 0.1-0.5% of VC is added into washing water, the water content is controlled to be 6-9% by filtering, the drying temperature is controlled to be 80-90 DEG C during drying, and the feeding speed is controlled to be 150-200 kg / h. The water content of the dried spherical nickelous hydroxide with the surface wrapped with the cobaltous hydroxide is0.3-1.0%, the color is even, oxidation is avoided, and the spherical nickelous hydroxide with the surface wrapped with the cobaltous hydroxide is suitable for positive active materials in batteries like Cd-Ni, MH-Ni and Zn-Ni batteries.

Description

technical field [0001] The invention belongs to the field of anode materials for secondary alkaline batteries, and relates to nickel hydroxide, in particular to a drying method and device for spherical nickel hydroxide whose surface is coated with cobalt hydroxide. Background technique [0002] With the further expansion of the battery application field, the demand for high energy density and high performance batteries also increases, so the performance of positive electrode active materials is also required to be improved. At present, most manufacturers of secondary alkaline batteries use doped spherical nickel hydroxide as the positive electrode active material. Since doped spherical nickel hydroxide is a P-type semiconductor with poor conductivity, its reversibility is poor, and the utilization rate of active materials is not high. In order to further improve the utilization rate of active materials, increase the reversibility of redox, increase the depth of discharge, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B3/02F26B21/10H01M4/36H01M4/52H01M4/62H01M10/30
CPCF26B3/02F26B21/10H01M4/366H01M4/52H01M4/624H01M10/30Y02E60/10
Inventor 邓洪民何子川龚继宝高文斌王文鹏王天武杨赞陈国栋
Owner JINCHUAN GROUP LIMITED