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Method for improving metal lithium electrolysis current efficiency

A technology of electrolysis current and metal lithium, applied in the direction of electrolysis process and electrolysis components, can solve the problem of low current efficiency in summer, and achieve the effect of convenient and simple process operation.

Pending Publication Date: 2020-12-11
EAST CHINA UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies of the prior art, the object of the present invention is to solve the problem of low summer current efficiency in high temperature and high humidity areas in the prior art, and provide a process for improving the summer current efficiency in high temperature and high humidity areas to overcome the deficiencies of the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1: Use a modular air-cooled chiller to provide 25°C and an absolute humidity of 1.0g / m 3 low humidity air;

[0024] Step 2: Arrange the operation room outside the electrolytic cell, place a temperature and humidity meter inside and outside the workshop, and monitor and record the temperature and humidity data in the working environment of the electrolytic cell at any time

[0025] Step 3: Introduce the low-humidity air obtained in Step 1 into the operation workshop, read and record through the temperature and humidity meter, and control the water vapor volume ratio at 1.5vol.%;

[0026] Step 4: Collect metal lithium products every 2 hours, take samples to calculate the current efficiency, and record the temperature and humidity data in the environment during the electrolysis process.

[0027] The current efficiency reaches 90%.

[0028] Calculation of current efficiency: electrolyze for 4 hours under the condition of 25KA, the theoretical output of electrolytic l...

Embodiment 2

[0037] Step 1: Use a modular air-cooled chiller to provide 20°C and an absolute humidity of 0.2g / m 3 low humidity air;

[0038] Step 2: Place temperature and humidity meters inside and outside the operation workshop to monitor and record the temperature and humidity data in the working environment of the electrolytic cell at any time

[0039] Step 3: directly pass the low-humidity air obtained in step 1 to the surface of the electrolytic cell, read and record through the temperature and humidity meter, and control the water vapor volume ratio at 0.8vol.%;

[0040] Step 4: Collect metal lithium products every 2 hours, take samples to calculate the current efficiency, and record the temperature and humidity data in the environment during the electrolysis process.

[0041] The current efficiency reaches 90%.

[0042] The current efficiency calculation process is the same as above.

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Abstract

The invention belongs to the technical field of fused salt electrolysis, and particularly relates to a method for improving metal lithium electrolysis current efficiency. The method is achieved through the following steps that air humidity control is conducted on a relatively-closed electrolysis workshop, or relatively-dry air with a certain water content is directly introduced into an electrolytic cell, and electrolysis is conducted under the condition that the water content in the atmosphere in the electrolytic cell is controlled to range from 0.5 vol.% to 2 vol.%. The method is convenient and easy to operate, suitable for rapidly and efficiently improving the current efficiency in summer in high-temperature and high-humidity areas and capable of improving the current efficiency in summer by 15% or above.

Description

technical field [0001] The invention belongs to the technical field of molten salt electrolysis, in particular to a method for improving the current efficiency of metal lithium electrolysis in high-temperature and high-humidity areas in summer. Background technique [0002] Molten salt electrolysis of lithium metal is currently the main means of industrial production of lithium metal. The current efficiency of metal lithium electrolysis is low in summer in high-temperature and high-humidity areas. Generally, the average ambient temperature in summer is generally in the range of 26°C-36°C, the maximum temperature in the workshop can reach 50°C, the relative humidity is 20%-30%, and the absolute air humidity is 15g / m 3 -25g / m 3 , the water vapor volume ratio in the air is 2vol.%-3vol.%, the current efficiency is 50%-60%; the ambient temperature in winter is 5°C-25°C, the maximum temperature in the workshop can reach 30°C, and the relative humidity is 7%-20%. , the absolute ...

Claims

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Application Information

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IPC IPC(8): C25C3/02C25C7/06
CPCC25C3/02C25C7/06
Inventor 路贵民张松岩朱实贵孙泽李良彬于建国
Owner EAST CHINA UNIV OF SCI & TECH
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