Spherical manganese carbonate and preparing method thereof

A technology of manganese carbonate and manganese carbonate powder is applied in chemical instruments and methods, manganese compounds, inorganic chemistry, etc., and can solve the problems of bridging, low powder bulk density, agglomerated particles, etc., and achieves low cost and simple synthesis process. , the effect of particle size can be controlled

Inactive Publication Date: 2008-09-24
GUANGZHOU RONGJIE MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the particle morphology and particle size of the powder are closely related to their packing density. When the irregular powder particles are mixed, there will be serious agglomeration and particle bridging phenomenon. When the particles are piled up and filled, there are large gaps between the particles. low bulk density

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Manganese chloride is made into 0.5M with deionized water, ammonium citrate is made into 0.5M mixed solution, sodium carbonate is made into 1M with deionized water, ammonia water is made into 0.5M mixed solution, open the stirring of reaction vessel, Put 2 / 3 volume of deionized water into the container, heat the bottom water to 40°C, add manganese chloride into the reaction container at a flow rate of 5ml / min, and add alkaline precipitant sodium carbonate at a flow rate of 4-6ml / min In the reaction vessel, by adjusting the flow rate of sodium carbonate, the pH value is controlled to be 7 ± 0.5, the precipitate generated by the reaction overflows to the washing and filtering equipment, and the precipitate is washed until the impurity content is qualified, and the pH of the washing water is 7 ± 0.5, and then filtered. Dry the filter cake at 100°C, pass through an 80-mesh sieve after drying, and obtain spherical manganese carbonate powder with a purity of ≥99%.

Embodiment 2

[0025] Use deionized water to make manganese chloride into 2M, ammonium citrate into 1M mixed solution, use deionized water to make ammonium bicarbonate into 2M, ammonia water into 1M mixed solution, open the reaction container and stir, and put it into the container 2 / 3 volume of deionized water, and heat the bottom water to 40°C, manganese chloride is added to the reaction vessel at a flow rate of 5ml / min, and the alkaline precipitant ammonium bicarbonate is added to the reaction vessel at a flow rate of 8-12ml / min In the reaction vessel, by adjusting the flow rate of ammonium bicarbonate, the pH value is controlled to be 7±0.5, the precipitate generated by the reaction overflows to the washing and filtering equipment, and the precipitate is washed until the impurity content is qualified, and the pH of the washing water is 7±0.5, and then filtered. Dry the filter cake at 100°C, pass through an 80-mesh sieve after drying, and obtain spherical manganese carbonate powder with a ...

Embodiment 3

[0027] Use deionized water to make manganese nitrate into 3M, ammonium citrate into 1M mixed solution, use deionized water to make ammonium bicarbonate into 2M, ammonia water into 0.5M mixed solution, open the reaction container and stir, and put it into the container 2 / 3 volume of deionized water, and the bottom water is heated to 50°C, manganese nitrate is added to the reaction vessel at a flow rate of 5ml / min, and the alkaline precipitant sodium hydroxide is added to the reaction vessel at a flow rate of 7.5-15ml / min In the container, by adjusting the flow rate of ammonium bicarbonate, the pH value is controlled to be 6.5±0.5, and the precipitate generated by the reaction overflows to the washing and filtering equipment, and the precipitate is washed until the impurity content is qualified. The pH of the washing water is 7±0.5, and then filtered, and the The filter cake is dried at 100°C, and passed through an 80-mesh sieve to obtain spherical manganese carbonate powder with...

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Abstract

The invention relates to a spherical manganese carbonate and the preparation method thereof, and mainly relates to the spherical manganese carbonate for preparing a manganese compound (manganese dioxide, etc.) of a dry battery, lithium manganese oxide of cathode materials for lithium ion batteries and derivatives, and the spherical manganese carbonate belongs to a chemical product. On the premise of easy industrial production realization, a method for simply preparing the spherical manganese carbonate with good fluidity is provided, and the spherical manganese carbonate is synthetized through controlling a synthesis technology. Particles of the manganese carbonate powder are spherical crystallization, the average particle size ranges from 2 to 30microns, the apparent density ranges from 1.3 to 1.8g per cm <3>, the tap density can reach over 2.0g per cm<3>, and the manganese content is equal to and larger than 47 percent. Experimental results indicate that the lithium manganese oxide synthetized by the manganese carbonate used as a precursor has better performance, and can improve electrochemical properties of lithium ion batteries. The lithium manganese oxide has good fluidity and highest bulk density, and can effectively improve the tap density of powder to cause materials to obtain higher specific capacity, thereby improving the electrochemical properties of the lithium ion batteries.

Description

technical field [0001] The present invention relates to a kind of spherical manganese carbonate, especially the preparation of high-density spherical manganese carbonate, which is mainly used to prepare a manganese compound (manganese dioxide, etc.) Chemical Products. Background technique [0002] Lithium-ion battery is a new type of power source, which has many advantages such as high voltage, large capacity, safety and environmental protection, so it is widely used in the field of secondary batteries. At present, lithium cobalt oxide is the most widely used cathode material for lithium-ion batteries, but cobalt materials are expensive, scarce resources, and cobalt is poisonous and pollutes the environment. At present, the development of high-performance and low-cost cathode materials for lithium-ion batteries is the fundamental starting point for the rapid development of this field. Among the existing cathode materials, lithium manganese oxide has become one of the hotsp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/00
Inventor 吕向阳左一村
Owner GUANGZHOU RONGJIE MATERIAL TECH
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