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Conductive antimonic acid lithium-ion adsorption agent and preparation method thereof

An ion adsorbent, lithium antimonate technology, applied in circuits, electrical components, battery electrodes, etc., can solve the problems of accelerating lithium ion adsorption and desorption, narrow mass transfer channels, environmental hazards, etc., and achieve accelerated adsorption and desorption. , the effect of increasing the adsorption capacity

Active Publication Date: 2018-07-06
合肥龙之韵医药技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of the monoclinic lithium antimonate adsorbent is that it has a high selectivity for lithium ions, and is especially suitable for the adsorption and extraction of lithium in complex components of seawater or brine. The speed is relatively slow, and it needs to be delithiated in hot high-concentration inorganic acid; although antimony acid is insoluble in cold water, it has potential environmental hazards, and it is necessary to reduce its dissolution loss in applications
[0005] In Chinese patent application CN2018100332486 (2018-01-14), metatitanic acid is used to dope and disperse antimonic acid, and the lithium antimonate ion adsorbent is firmly fixed on the surface of light glass material, further expanding its surface area, thus speeding up the process. Lithium ion adsorption and desorption speed, but the lithium ion adsorption capacity is still only about half of the theoretical adsorption capacity, there is still a lot of room for improvement and improvement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 50 mL of 1 mol / L antimony potassium tartrate aqueous solution into the glass reactor, add 100 mL of 4 mol / L potassium hydroxide aqueous solution under strong stirring to adjust the pH of the solution to 8-9, then add 50 mL of 4 mol / L hydrogen peroxide aqueous solution, Generate Sb(OH) 5 White precipitate, wash the precipitate with deionized water; add the precipitate to 50mL of 1mol / L tartaric acid aqueous solution, heat and peptize at 60-70°C for 1h, then slowly add 1mol / L lithium hydroxide aqueous solution 100mL, concentrate to form a mass of 100% 88.5g of lithium antimonate hydrosol with a concentration of 20%. Immerse 9.0 g of the cleaned conductive carbon fiber powder into 88.5 g of lithium antimonate hydrosol with a mass percentage concentration of 20%, so that the lithium antimonate sol is coated on the surface of the conductive carbon fiber powder and enters its surface pores, and heated and evaporated The lithium antimonate sol is gelled on the conductive ...

Embodiment 2

[0028] The conductive graphite powder 8.0g that cleans up is immersed in the lithium antimonate hydrosol 80g that is 20% in the mass percent concentration prepared according to the embodiment 1 method, makes lithium antimonate sol be coated on the conductive graphite powder surface and enter its In the surface channel, heat and evaporate to make the lithium antimonate sol gel on the conductive graphite powder, and dry the gel at 100-150°C. Immerse 24.0 g of lithium antimonate gel loaded with conductive graphite powder in 21.3 g of an aqueous solution of stannous acetate with a concentration of 20% by mass, so that stannous acetate is coated on the surface of lithium antimonate, at 100-150 ° C drying. It was put into a high-temperature furnace and heat-treated at 800° C. for 12 hours to form 26.7 g of lithium antimonate ion adsorbent precursor.

[0029] Cover 26.7g of lithium antimonate ion adsorbent precursor with carbon fiber conductive cotton and fill it into titanium catho...

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Abstract

The invention relates to a conductive doped antimonic acid lithium-ion adsorption agent, in particular to an antimonic acid lithium-ion adsorption agent wrapped by doped stannic oxide and loaded by ananticorrosion conductive material. The lithium ion adsorption capacity is 15-20 mg / g; the mass of doped antimonic acid accounts for 50-60% of that of the lithium-ion adsorption agent, and the chemical composition of doped antimonic acid is H1+xSnxSb1-xO3, wherein x=0.02-0.1; the mass of doped stannic oxide accounts for 5-15% of that of the lithium-ion adsorption agent, the chemical composition ofdoped stannic oxide is SbySn1-yO2, wherein y=0.02-0.1; and the mass of the anticorrosion conductive material accounts for 20-30% of that of the lithium-ion adsorption agent, and the anticorrosion conductive material is one of conductive graphite powder, graphene powder, conductive carbon black, conductive carbon fiber powder, conductive oxide microsphere or anticorrosion foam metal powder. The adsorption and desorption process of the lithium-ion adsorption agent is strengthened by adopting an electrochemical method, the adsorption and desorption speed of lithium ions is increased, and the adsorption capacity of the lithium ions is improved.

Description

technical field [0001] The invention relates to a conductive lithium antimonate ion adsorbent and a preparation method thereof, in particular to a lithium antimonate ion adsorbent coated with tin dioxide and loaded with a corrosion-resistant conductive material and a preparation method thereof, belonging to the field of new energy materials . technical background [0002] As the market price of lithium-containing materials continues to rise, the research on lithium sources has also expanded from traditional lithium ore extraction to the development and utilization of liquid lithium resources such as salt lake brine, seawater and geothermal water. The adsorption-ion exchange method has simple process, high recovery rate and good selectivity, and is especially suitable for extracting lithium from concentrated lithium-containing aqueous solution. The key to this method is to prepare an adsorbent with large adsorption capacity and good cycle performance. [0003] Lithium-ion ad...

Claims

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Application Information

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IPC IPC(8): H01M4/62
CPCH01M4/62Y02E60/10
Inventor 李建生王少杰王泽江刘炳光卢俊锋刘红玉田茂
Owner 合肥龙之韵医药技术有限公司
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