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Guangdong Brunp Recycling Technology Co., Hunan Brunp Recycling Technology Co. and Hunan Brunp End Of Life Vehicles Recycling Co. | Date: 2015-03-06

The present invention relates to the technical field of preparation of a nickel cobalt lithium manganese oxide positive electrode material. Disclosed are a power-type nickel cobalt lithium manganese oxide material and a preparation method therefor and uses thereof. The preparation method comprises: adding an organic acid into a mixed aqueous solution of a lithium source, a nickel source, a cobalt source and a manganese source, aging, obtaining a sol precursor, obtaining a gel fiber through electrospinning, and obtaining the power-type nickel cobalt lithium manganese oxide material after calcination. In the present invention, the nickel cobalt lithium manganese oxide material of a nano-fiber structure is prepared by using a sol-gel electrospinning method, and the nickel cobalt lithium manganese oxide material of a nano-fiber structure has a uniform structure size, thereby effectively reducing surface energy, and improving a capacity of lithium ions.


Tan Q.-Y.,Hunan Brunp Recycling Technology Co. | Tang H.-H.,Hunan Brunp Recycling Technology Co. | Kong S.-L.,Hunan Brunp Recycling Technology Co. | Chen R.-K.,Hunan Brunp Recycling Technology Co. | And 2 more authors.
Guocheng Gongcheng Xuebao/The Chinese Journal of Process Engineering | Year: 2015

The separation of aluminum from nickel, cobalt and manganese in complexation-precipitation systems was studied. The relationships between metal ion concentration and pH value in the systems of Me-OH- and Me-OH--NH3 were simulated by thermodynamic calculation. Aluminum was eliminated of by hydrolysis-precipitation method. The results showed that separation of aluminum from nickel, cobalt and manganese in sulfate solution was effective in the Me-OH--NH3 and Me-OH--NH3-CO32- systems. When the pH value was 4.5, the recovery rate of nickel, cobalt and manganese was 98.57%, 99.63% and 99.91%, respectively, and the removal rate of aluminum 99.94%. ©, 2015, Science Press. All right reserved.


Jiang K.-L.,Hunan Brunp Recycling Technology Co. | Long G.-H.,Hunan Brunp Recycling Technology Co. | Tan Q.-Y.,Hunan Brunp Recycling Technology Co. | Tan J.-J.,Hunan Brunp Recycling Technology Co. | Tang H.-H.,Hunan Brunp Recycling Technology Co.
Yejin Fenxi/Metallurgical Analysis | Year: 2012

Under the existence of protective agents and in acidic solution, fine and uniform suspended particles barium sulfate BaSO4 formed by sulfate radical SO4 2- and barium ions Ba2+ make the solution turbid, and there is a proportional relationship between the turbidity and the content of sulfate radical SO4 2- in sample solution. On the basis of the principle stated above, a spectroturbidimetry for the determination of content of sulfate radical SO4 2- in cobalt chloride with glycerol as stabilizer is established. Influences of factors such as sonic oscillation, concentration of glycerol, and stable time on the test results are studied, and the various conditions are optimized. Cobalt affects the determination, but this effect can be eliminated by adding the cobalt chloride solution containing no sulfate radical into the standard contrasting solution to make the concentration of cobalt in standard contrasting solution in consistency with that in sample solution. The detection range of sulfate radical in cobalt chloride solution is 0% to 0.1%, the relative standard deviation is 0.84% to 3.4%, and the recovery rate is 98% to 101%. The method has been used for the determination of sulfate radical in cobalt chloride products for almost two years with better results. The method is suitable for promotion.


Patent
Guangdong Brunp Recycling Technology Co. and Hunan Brunp Recycling Technology Co. | Date: 2013-04-28

A method for preparing nickel-cobalt-manganese hydroxide. The method comprises the following steps: (1) dissolving microcrystalline cellulose into water to obtain a suspension; and adding a nickel source, a cobalt source, and a manganese source into the suspension to obtain a solution containing nickel, cobalt, and manganese; (2) adding hexamethylenetetramine into the solution containing nickel, cobalt, and manganese, heating the reaction solution to 80-90 C., and reacting for 5-10 min, then heating with a microwave hydrothermal synthesis instrument at a frequency of 2450 MHz for 10-60 min; and (3) filtering the reaction solution obtained in step (2), and taking the filter residue, washing the filter residue with pure water and ethanol respectively, then drying, crushing, and screening the filter residue to obtain nickel-cobalt-manganese hydroxide. Nickel-cobalt-manganese hydroxide prepared from the abovementioned method has a uniform particle size and consistent morphology and structure; thus solving the problems of the uncontrollable appearance and structure and the inconsistent performances of the product caused by the vigorous reaction in the existing method for preparing nickel-cobalt-manganese hydroxide.

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