Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Screening method of high-temperature stable lignin for storage battery

A high-temperature stability and screening method technology, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of inability to scientifically determine the correlation of high-temperature resistance performance of lignin batteries, many factors affecting batteries, and short high-temperature treatment time, etc., to achieve the stage change process Comprehensive evaluation, excellent cold start performance, good high temperature stability

Active Publication Date: 2021-01-19
骆驼集团蓄电池研究院有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For judging the high-temperature stability of lignin, there is no uniform detection method in the industry at present. The traditional method of assembling lignin into a battery and then performing a high-temperature charge-discharge cycle to test its high-temperature resistance is time-consuming and laborious, and other components inside the battery There are many influencing factors, and it is impossible to scientifically determine the correlation between the change of lignin and the high temperature resistance of the battery
Then there is a method of using sodium lignosulfonate to have a sulfonic acid group to form a colloid in an acidic solution, and to determine its high temperature resistance by detecting the difference in the average particle size of the colloid of sodium lignosulfonate before and after high temperature treatment. However, this method is only detectable for sodium lignosulfonate samples, and the high-temperature treatment time is short, and there are many types of lignin samples that are currently put on the market in the battery field (including sodium lignosulfonate, sodium lignocarboxylate, sulfonated Alkali lignin, synthetic benzene sulfonate, naphthalene sulfonate, etc.), and the high-temperature stability will have a certain trend of change according to the length of time that the lignin is in a high-temperature environment. A wide range of high-temperature-resistant lignin screening methods is an urgent problem to be solved in the battery industry

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Screening method of high-temperature stable lignin for storage battery
  • Screening method of high-temperature stable lignin for storage battery
  • Screening method of high-temperature stable lignin for storage battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) Select two lignosulfonate products H and G, and prepare lignin concentrations of 100mg / L, 50mg / L, 25mg / L, 12.5mg / L, 6.25mg / L in 4g / L NaOH solution respectively L, 3.125mg / L, 1.5625mg / L series of standard solutions, the balance adopts an analytical balance, and a volumetric flask is used to constant volume; the standard curve is as attached figure 1 , 2 shown;

[0051] (2) Use a UV-visible spectrophotometer to test the full-wavelength ultraviolet light, record the ultraviolet absorption value A at the maximum absorption wavelength, and use the concentration and light absorption value to draw the standard curve A=aC+b of this lignin in an alkaline solvent. R 2 >99.9%, where A is the absorbance, C is the concentration, the unit is mg / L, a and b are the values ​​obtained by linear simulation;

[0052] The standard curve equation of lignin G in this UV standard curve test is: A=0.01097+0.01273C, where A represents the absorbance value, C represents the concentration o...

Embodiment 2

[0060] Select two kinds of alkali lignin products W and J, measure their standard curve in DMF complete solution, select 1.19g / cm3 for high temperature test electrolyte density 3 , the ambient temperature is selected to be 75°C, the test cycle is selected to be 30 days, and other operating steps are the same as in Example 1; the corresponding daily dissolution rate and daily decomposition rate data are calculated according to the concentration value, and the results are shown in Table 2 and attached Figure 5 , 6 shown.

[0061]

[0062] W lignin is more soluble than J lignin at high temperature, and its decomposition rate is lower. The results show that W lignin is more stable than J lignin at high temperature of 75 °C.

Embodiment 3

[0064] Choose a kind of benzene sulfonate expansion agent product T and a kind of naphthalene sulfonate expansion agent product N, measure its 1.19g / cm 3 For the standard curve in sulfuric acid solution, the density of the electrolyte for high temperature testing is 1.19g / cm 3 , the ambient temperature is selected at 60°C, the test period is selected at 15 days, and other operating steps are the same as in Example 1; the corresponding daily dissolution rate and daily decomposition rate data are calculated according to the concentration value, and the results are shown in Table 3 and attached Figure 4 shown.

[0065]

[0066] The daily dissolution rate of T synthetic expansion agent and N synthetic expansion agent is close, but the decomposition rate of T synthetic expansion agent is larger than that of N synthetic expansion agent under the same test environment. more stable.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a screening method of high-temperature stable lignin for a storage battery, and belongs to the technical field of lead-acid storage battery additives. The method mainly solvesthe problems that at present, the high-temperature resistance of lignin can be detected only after a battery is assembled, time and labor are consumed, and the relevance between lignin and the high-temperature resistance of the battery cannot be accurately judged. The method is mainly characterized by comprising the following steps: simulating a battery formation environment and a high-temperaturelife test environment, detecting the dissolving amount of a quantitative lignin sample in a sulfuric acid electrolyte and the remaining amount of the quantitative lignin sample in the sulfuric acid electrolyte, and calculating the amount of lignin lost due to degradation and inactivation in the high-temperature sulfuric acid electrolyte through an ultraviolet standard curve equation. Therefore, ahigh-temperature daily dissolution rate curve and a high-temperature daily decomposition rate curve of the lignin are drawn, the lignin type which can stably exist for a long time in a high-temperature environment is screened out through data and spectrogram comparison, and the high-temperature-resistant lignin screening method which is efficient, stable and wide in application range is providedfor the storage battery industry.

Description

technical field [0001] The invention belongs to the technical field of lead-acid storage battery additives, and in particular relates to a method for testing the high-temperature stability of a lignin additive for lead-acid storage battery lead plaster in a sulfuric acid electrolyte. Background technique [0002] The molecular structure of lignin is mainly based on phenylpropanyl groups, and there are active groups such as alcoholic hydroxyl groups, phenolic hydroxyl groups, methoxyl groups, carboxyl groups, and carbonyl groups that occupy different positions in the material structure. At the same time, these active functional groups affect in different ways. It refers to the physical, chemical, electrochemical processes and crystallization processes involved in the formation and disintegration of the active material structure. Therefore, under the premise that the same kind of lignin can not guarantee that its physical and chemical properties are completely consistent, the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/33
CPCG01N21/33Y02E60/10
Inventor 王倩徐建刚史俊雷夏诗忠刘长来
Owner 骆驼集团蓄电池研究院有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com