Preparation method of composite conductive agent for water-based power battery

A technology of composite conductive agent and power battery, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the environmental protection problems of ammonia water and other problems, and achieve the effects of environmental friendliness, controllable shape and good reproducibility

Active Publication Date: 2019-07-12
淄博君行电源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the deficiencies of the above-mentioned patents are manifested in the large environmental protection problems of ammonia water, the inability to rationally control and select the preparation of ultra-fine nickel powder / carbon composite materials according to production needs, and the difficulty in handling organic solvents.
[0007] Carbon material is also an excellent conductive agent commonly used in water-based power batteries. When used as a composite material with ultra-fine nickel powder, it can reduce the slurry configuration process of water-based power batteries, but the particle size and shape of the preparation process are controllable without auxiliary agents. The report of spherical ultrafine nickel powder / carbon material with a particle size of 0.06-1.2 μm has not been reported yet

Method used

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  • Preparation method of composite conductive agent for water-based power battery
  • Preparation method of composite conductive agent for water-based power battery
  • Preparation method of composite conductive agent for water-based power battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Nickel sulfate and sodium oxalate are respectively configured as liquid A and liquid B with deionized water, and the concentration is 2mol / L;

[0043] (2) Use deionized water as the bottom liquid of the reaction kettle, add liquid A and liquid B at the same time, the liquid flow ratio of liquid A and liquid B is 100:100.5, the synthesis temperature is 40°C, the pH value is 10, and the reaction forms amorphous Precipitate nickel oxalate; when the reaction solution reaches the overflow port, open the overflow port valve, the overflow slurry is separated by the cyclone separator, and the slurry that meets the particle size requirements is directly discharged, and the particle size requirements that do not meet the particle size requirements are returned to the reactor to continue the reaction. To achieve the purpose of continuous synthesis.

[0044] (3) After the aging of amorphous precipitated nickel oxalate, the filter cake is obtained by solid-liquid separation, and...

Embodiment 2

[0050] (1) Nickel sulfate and sodium oxalate were configured as liquid A and liquid B respectively with deionized water, and the concentration was 1.5mol / L;

[0051] (2) Use deionized water as the bottom liquid of the reaction kettle, add liquid A and liquid B at the same time, the liquid flow ratio of liquid A and liquid B is 100:100.1, the synthesis temperature is 30°C, the pH value is 6, and the reaction forms amorphous Precipitate nickel oxalate; when the reaction solution reaches the overflow port, open the overflow port valve, the overflow slurry is separated by the cyclone separator, and the slurry that meets the particle size requirements is directly discharged, and the particle size requirements that do not meet the particle size requirements are returned to the reactor to continue the reaction. To achieve the purpose of continuous synthesis.

[0052] (3) After the aging of amorphous precipitated nickel oxalate, the filter cake is obtained by solid-liquid separation, ...

Embodiment 3

[0058] (1) Nickel sulfate and sodium oxalate were configured as liquid A and liquid B respectively with deionized water, and the concentration was 1.8mol / L;

[0059] (2) Use deionized water as the bottom liquid of the reaction kettle, add liquid A and liquid B at the same time, the liquid flow rate ratio of liquid A and liquid B is 100:100.3, the synthesis temperature is 35°C, the pH value is 9, and the reaction forms amorphous Precipitate nickel oxalate; when the reaction solution reaches the overflow port, open the overflow port valve, the overflow slurry is separated by the cyclone separator, and the slurry that meets the particle size requirements is directly discharged, and the particle size requirements that do not meet the particle size requirements are returned to the reactor to continue the reaction. To achieve the purpose of continuous synthesis.

[0060] (3) After the aging of amorphous precipitated nickel oxalate, the filter cake is obtained by solid-liquid separat...

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Abstract

The invention belongs to the technical field of preparation of functional powder materials, and particularly relates to a preparation method for a compound conductive agent for aqueous power batteries. Aqueous sodium oxalate solution and aqueous nickel sulfate solution are added together into deionized water to react, so that amorphous precipitated nickel oxalate is produced by the reaction; after aging and solid-liquid separation, a filter cake is obtained; the filter cake is added into HPMC (Hydroxy Propyl Methyl Cellulose) glue and uniformly stirred into slurry; the slurry is spray-dried into spherical granules; the spherical granules are reduced by adopting hydrogen, and thereby a spherical ultrafine nickel powder / carbon material is obtained. The spherical ultrafine nickel powder / carbon material with granularity from 0.06mu m to 1.2mu m which is prepared by the invention without assistant agent can fully meet the requirement on the compound conductive agent for aqueous power batteries, the oxygen content is low, the properties of the product are stable, the repeatability is good, moreover, the production process is non-toxic, pollution-free and environment-friendly, the properties of the product are excellent, the demand on the compound conductive agent for aqueous power batteries is satisfied, imported products can be replaced, foreign technological monopoly is broken, and the domestic technological gap is filled.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional powder materials, and in particular relates to a preparation method of a composite conductive agent for water system power batteries. Background technique [0002] As an excellent conductive agent, ultrafine nickel powder has been widely used as a conductive agent in aqueous power batteries. The current ultrafine nickel powder production processes mainly include carbonyl method, electrolysis method, atomization method, gas phase reduction method, atmospheric pressure liquid phase reduction method, solid phase reduction method, and γ-ray radiation method, among which the carbonyl method is the most commonly used. Carbonyl method, that is, to make Ni(CO) 4 Decomposition, by adjusting the process parameters, controlling the nucleation, growth, agglomeration and sintering behavior of metal nickel powder, and preparing ultra-fine nickel powder with a "chain bead" shape, which is easy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/62
CPCH01M4/625H01M4/626Y02E60/10
Inventor 蒋志军韩世幸闫慧忠赵鑫可丹丹张慧江名喜彭军文
Owner 淄博君行电源技术有限公司
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