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Lithium extracting unit adopting flowing electrode, extending device and continuous operating method

A technology of flowing electrodes and flow channels, which is applied in the field of lithium ion collection, can solve the problems of low continuous operation efficiency, limited electrode/lithium-containing brine contact area, and difficult operation, so as to increase the degree of operation automation, realize processing capacity, and avoid Toggle fluid effects

Active Publication Date: 2019-03-19
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above schemes all use fixed electrodes as adsorption and desorption lithium ion carriers, which have disadvantages such as difficult operation, limited electrode / lithium-containing brine contact area, and low continuous operation efficiency.

Method used

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  • Lithium extracting unit adopting flowing electrode, extending device and continuous operating method
  • Lithium extracting unit adopting flowing electrode, extending device and continuous operating method
  • Lithium extracting unit adopting flowing electrode, extending device and continuous operating method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0064] Example 1: The lithium intercalation and delithiation active material in the lithium intercalation and desorption flow electrode slurry is lithium manganate, the carbon particles in the carbon particle flow electrode slurry are activated carbon, and the applied voltage between the positive and negative electrode current collectors is controlled at 1.2V. The channel flow rate is 3ml / min, the scale is the smallest unit (three channels), the lithium ion extraction efficiency is 17umol / min, and the energy utilization efficiency is 9.6%. The solution temperature of the lithium-containing brine channel and the recovery solution channel is 20° C., and the pH value is 6.8.

Embodiment 2

[0065] Example 2: The lithium intercalation and desorption active material in the lithium intercalation and desorption flow electrode slurry is lithium manganate, and the carbon particles in the carbon particle flow electrode slurry are activated carbon. The voltage applied between the positive and negative current collectors is controlled at 1.2V, the single-channel flow rate is 3ml / min, the scale is three groups of smallest units (nine channels), the lithium ion extraction efficiency is 72umol / min, and the energy utilization efficiency is 33%. The temperature of the solution in the lithium-containing brine channel and the recovery solution channel is 25° C., and the pH value is 6.8.

Embodiment 3

[0066] Embodiment 3: The lithium intercalation and deintercalation active material in the lithium intercalation and desorption flow electrode slurry is lithium nickel molybdenum manganese oxide, and the carbon particles in the carbon particle flow electrode slurry are activated carbon. The applied voltage between the positive and negative current collectors is controlled at 1.2V, the single-channel flow rate is 2ml / min, the scale is three groups of smallest units (nine channels), the lithium ion extraction efficiency is 86umol / min, and the energy utilization efficiency is 29%. The solution temperature of the lithium-containing brine channel and the recovery solution channel is 15° C., and the pH value is 7.5.

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Abstract

The invention belongs to the field of lithium ion collection and in particular relates to a lithium extracting unit adopting a flowing electrode, an extending device and a continuous operating method.The lithium extracting unit comprises an electric adsorption module and an electric desorption module corresponding to the electric adsorption module. The electric adsorption module comprises three adsorption module flowing channels constructed by a porous material. The invention can be used for finish a continuous operation f electric adsorption-electric desorption and a lithium enriching solution rich in lithium ions, therein an adsorbent is used circularly. The invention solves the problems that the lithium extracting efficiency by an intermittent lithium extracting operation and a continuous lithium extracting operation by adopting a fixed electrode is low and the electrode or a fluid is tedious to switch. Meanwhile, by adopting standard dimension modules, output is amplified and amplification effect is avoided by extending the quantity of the modules.

Description

technical field [0001] The invention belongs to the field of lithium ion collection, and in particular relates to a lithium extraction unit using a flowing electrode, an expansion device and a continuous operation method. Background technique [0002] As a high-efficiency energy storage technology, lithium-ion batteries are more and more widely used, making the demand for lithium increasing day by day. The traditional brine lithium extraction technology has disadvantages such as low efficiency, time-consuming, and environmental problems. Lithium reserves in sea brine are much higher than that of ore. At present, lithium extraction from sea brine mainly uses evaporation and precipitation to obtain lithium carbonate. The whole process of this method uses sunlight as energy, which takes 12-18 months, and is separated according to the solubility of each ion in the later stage. At that time, it is difficult to separate lithium and magnesium. In addition, in this process, a large ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/42C22B26/12
CPCC22B3/42C22B26/12
Inventor 赵晓昱曹汝鸽王彦飞沙作良
Owner TIANJIN UNIV OF SCI & TECH
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