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Method for determining sodium lignosulphonate adsorption quantities of carbon materials

A technology of sodium lignosulfonate and its determination method, which is applied in the field of determination of the adsorption capacity of carbon materials to sodium lignosulfonate

Active Publication Date: 2014-10-01
ZHEJIANG TIANNENG BATTERY JIANGSU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although carbon materials as battery additives can improve many performances of batteries, their high porosity, specific surface area and other characteristics also lead to their strong adsorption performance, so the added lignosulfonate will be adsorbed by it, which will lead to carbon Part of the pores of the material are blocked, which limits the role of the carbon material. At the same time, part of the sodium lignosulfonate is adsorbed, which also leads to the inability of the sodium lignosulfonate to play its original performance in the battery. Reasonable selection of battery additive carbon materials and lignosulfonic acid Sodium needs to determine the adsorption capacity of carbon materials to sodium lignosulfonate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of assay method of carbon material to sodium lignosulfonate adsorption capacity, comprises the following steps:

[0026] (1) Weigh the dry funnel on a balance, and record the weight of the funnel as 57.493g;

[0027] (2) Set the mass to 1g - Sodium lignosulfonate was dissolved in 1.34g / ml of sulfuric acid with a volume of 500ml, then it was placed on a magnetic stirrer and stirred for 30min, then left to stand at room temperature for 24h;

[0028] (3) Suction filter the solution in step 2, collect the filter residue and filtrate, obtain a volume of 500ml of the filtrate, measure the absorbance of the filtrate at a wavelength of 280nm with a spectrophotometer and record it as A1 1.705;

[0029] (4) Rinse the filter residue in the funnel in step 3 with pure water for 3 times, then dry it in a vacuum oven at 70°C for 12 hours, weigh the total mass of the funnel and filter residue to be 58.177 g, and then The quality of sodium lignosulfonate in sulfuric acid M- 3 ...

Embodiment 2

[0036] A kind of assay method of carbon material to sodium lignosulfonate adsorption capacity, comprises the following steps:

[0037] (1) Weigh the dry funnel on a balance, and record the weight of the funnel as 57.493g;

[0038] (2) Dissolve 1g of sodium lignosulfonate in 1.34g / ml of sulfuric acid with a volume of 500ml, then place it on a magnetic stirrer and stir for 30min, then let it stand at room temperature for 24h;

[0039] (3) Suction filter the solution in step 2, collect the filter residue and filtrate, obtain a volume of 500ml of the filtrate, measure the absorbance of the filtrate at a wavelength of 280nm with a spectrophotometer and record it as 1.130;

[0040] (4) Rinse the filter residue in the funnel in step 3 with pure water for 3 times, then dry it in a vacuum oven at 70°C for 12 hours, weigh the total mass of the funnel and the filter residue to be 58.283 g, and then The mass of sodium lignosulfonate in sulfuric acid is 0.791g;

[0041] (5) Then the conc...

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Abstract

The invention discloses a method for determining the sodium lignosulphonate adsorption quantities of carbon materials. The method comprises the following steps: firstly dissolving sodium lignosulphonate in sulfuric acid at a required concentration until sodium lignosulphonate is fully dissolved, adopting a circulating vacuum pump for suction filtration, collecting the filtrate in which part of sodium lignosulphonate is dissolved and measuring the absorbance of the filtrate by utilizing an ultraviolet-visible spectrophotometer; collecting the filter residues, treating and drying the filter residues and determining the mass of undissolved lignin; respectively adding different carbon materials in the same quantity to the isometric filtrate, standing for 12 hours and above under a required temperature, filtering the solution, collecting the filtrate and measuring the absorbance of the filtrate by utilizing the ultraviolet-visible spectrophotometer; and determining the change of the concentration of acid soluble lignin by utilizing the change of the absorbance value of the filtrate before and after adding carbon according to the Lambert-Beer's Law A=KC, thus obtaining the sodium lignosulphonate adsorption quantities of different carbon materials. The method is simple to operate, can quantitatively determine the sodium lignosulphonate adsorption quantities of the carbon materials, is convenient for knowing the adsorption capacities of the carbon materials and provides certain reference for screening the cell additives-carbon materials and sodium lignosulphonate.

Description

technical field [0001] The invention relates to the field of lead-acid storage batteries, in particular to a method for measuring the adsorption amount of sodium lignosulfonate by carbon materials. Background technique [0002] Lead-carbon batteries are widely used in electric vehicles and other fields because of their advantages such as high energy ratio, safety and reliability, low price, high power, and long cycle life. Carbon materials and lignin are indispensable in the negative plate of lead-carbon batteries. part. Sodium lignosulfonate, as an organic expansion agent, can prevent the shrinkage of the lead surface of the negative electrode and the passivation of the lead sulfate of the negative electrode in a low temperature environment, and can effectively improve the low temperature performance of the battery. Because carbon materials have good specific surface area, porosity, electrical conductivity, etc., adding them to the negative electrode can increase the speci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/33
Inventor 周燕赵冬冬陈飞方明学
Owner ZHEJIANG TIANNENG BATTERY JIANGSU