Manufacturing method of salt bridge used in low temperature environment

A low-temperature environment and production method technology, applied in the direction of electrochemical variables of materials, can solve the problems of residual bubbles, easy solidification, and non-gelation, etc., and achieve the effects of moderate gelation speed, stable chemical properties, and good fluidity

Active Publication Date: 2015-02-04
TIANNENG GRP JIANGSU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are some deficiencies in the traditional manufacturing method: 1. The single size of the U-shaped tube cannot meet the needs of the experiment, and the salt bridge required for the single-cell defect test needs to be intercepted in advance, which brings inconvenience to the production of the salt bridge
2. When the agar is hot, it is easy to leave air bubbles in the U-shaped tube, which will affect the experimental results.
3. Agar is easy to solidify, and the speed of pouring into the U-shaped tube should be fast, so it is inconvenient to infuse
4. Sometimes there will be no gel
5.

Method used

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  • Manufacturing method of salt bridge used in low temperature environment
  • Manufacturing method of salt bridge used in low temperature environment
  • Manufacturing method of salt bridge used in low temperature environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The salt bridge used under the low temperature environment has the ratio of raw materials in parts by weight, saturated potassium nitrate solution: soluble starch: density of 1.34g / cm 3 The ratio of dilute sulfuric acid is 8:7:4.

[0030] 1. First measure 8 grams of saturated KNO 3 The solution is placed in a 30mL small beaker, and the density is 1.34g / cm 3 Slowly pour 4 grams of dilute sulfuric acid into the saturated KNO 3 In a small beaker of the solution, stir well with a glass rod. Then measure 7 grams of soluble starch, pour into the saturated KNO 3 In a small beaker of the solution, stir it with a glass rod for a few seconds until it is uniform and presents a cloudy floating state.

[0031] 2. Make sure that the bottom of the beaker is dry and put it on the preheated muffle furnace, and then stir it with a glass rod for 1-2 minutes, so that the turbid floating starch is heated to a translucent beige paste, stop stirring, and turn off the power of the muffle f...

Embodiment 2

[0036] The salt bridge used under the low temperature environment has the ratio of raw materials in parts by weight, saturated potassium nitrate solution: soluble starch: density of 1.34g / cm 3 The ratio of dilute sulfuric acid is 10:10:2.

[0037] The preparation steps are as in Example 1.

[0038] Cut the prepared salt bridge to a length of 100mm as required, press figure 1 The connection method is connected, and placed in different environments at 0 ° C ~ -18 ° C for 12 hours, according to the process, the current 6A is discharged to 1.75V / single cell, and then 0.18C 2 A limited voltage 2.5V / single cell constant current and constant voltage charging for 12 hours. Process the measured positive and negative electrode potentials, and compare them with the previous punching method, such as image 3 shown.

[0039] From Example 2, image 3The results of the test show that the test results of the salt bridge prepared by this method are basically consistent with the discharge ...

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Abstract

The invention discloses a manufacturing method of a salt bridge used in low temperature environment. The mixture in the salt bridge is composed of the following components: a saturated potassium nitrate solution, soluble starch, and diluted sulfuric acid with a density of 1.2 to 1.35 g/cm3 according to a weight ratio of 5-11:4-10:1-5. The salt bridge is made of plastic soft pipe. The manufacture of the salt bridge is simple, the raw material consumption is little, the length of the salt bridge can be adjusted at will, and the soluble starch has good solubility. The salt bridge has the advantages of stable chemical property, strong absorbing force, good fluidity, and proper gelation speed, and can be used in low temperature environment with a temperature of -20 to 0 DEG C, and the test results are precise and stable. Moreover the shortages of conventional salt bridges are overcome.

Description

technical field [0001] The invention relates to the field of salt bridge manufacturing methods, in particular to a salt bridge manufacturing method used in a low-temperature environment. Background technique [0002] For experimental batteries with poor low-temperature discharge capacity, in order to further analyze whether the cause of poor low-temperature performance is the problem of the positive plate or the negative plate, the reference electrode is often used to measure the potential of the positive and negative electrodes, and the relative value is used to determine whether the battery is charging or discharging. The quality status of positive and negative plates can be monitored to improve the analysis of battery capacity and the cause of failure. The current unipolar potential test method is to connect a container externally after punching a hole on the battery case wall, and then add the same electrolyte in the container as the inside of the battery to form a path,...

Claims

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Application Information

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IPC IPC(8): G01N27/28
Inventor 马换玉李春景陈飞方明学杨惠强
Owner TIANNENG GRP JIANGSU TECH
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