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Method for preparing upconversion fluorescent material from waste lithium battery electrolyte

A technology for the preparation of waste lithium batteries and electrolytes, which is applied in the direction of luminescent materials, battery recycling, recycling technology, etc., and can solve problems such as high cost, reduced service life of lithium batteries, and poor electrolyte quality

Active Publication Date: 2016-06-22
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantages of these methods are that the steps are cumbersome and the cost is high.
Due to the influence of impurities, the quality of the recovered electrolyte is poor, which reduces the service life of lithium batteries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1, obtaining the electrolyte solution of the waste lithium battery that has been cleaned of impurities, the solvent of the electrolyte solution is ethylene carbonate, and the solute is a mixture of lithium hexafluorophosphate and lithium hexafluoroborate;

[0032] The content of lithium hexafluorophosphate is 0.5mol / L, 0.05mol / L of lithium hexafluoroborate;

[0033] In step 2, the electrolyte solution obtained in step 1 is added to a three-necked flask containing an organic solvent, calcium ions and rare earth ions, and continuously stirred;

[0034] Described organic solvent is made up of octadecene and oleic acid, and the volume ratio of octadecene and oleic acid is 4:1;

[0035] The concentration of the calcium ion in the organic solvent is 0.33mol / L;

[0036] The rare earth ions are composed of Er 3+ 、Tm 3+ and Yb 3+ Ionic composition, Er 3+ The concentration of ions in the organic solvent is 0.006mol / L, Tm 3+ The concentration of ions in the organic solv...

Embodiment 2

[0043] Step 1, obtaining the electrolyte solution of the waste lithium battery that has been cleaned of impurities, the solvent of the electrolyte solution is ethylene carbonate, and the solute is a mixture of lithium hexafluorophosphate and lithium hexafluoroborate;

[0044] The content of lithium hexafluorophosphate is 2.0mol / L, 0.4mol / L of lithium hexafluoroborate;

[0045] In step 2, the electrolyte solution obtained in step 1 is added to a three-necked flask containing an organic solvent, calcium ions and rare earth ions, and continuously stirred;

[0046] Described organic solvent is made up of octadecene and oleic acid, and the volume ratio of octadecene and oleic acid is 6:1;

[0047] The concentration of the calcium ion in the organic solvent is 1.50mol / L;

[0048] The rare earth ions are composed of Er 3+ 、Tm 3+ and Yb 3+ Ionic composition, Er 3+ The concentration of ions in the organic solvent is 0.03mol / L, Tm 3+ The concentration of ions in the organic solven...

Embodiment 3

[0055] Step 1, obtaining the electrolyte solution of the waste lithium battery that has been cleaned of impurities, the solvent of the electrolyte solution is ethylene carbonate, and the solute is a mixture of lithium hexafluorophosphate and lithium hexafluoroborate;

[0056] The content of lithium hexafluorophosphate is 1.0mol / L, 0.2mol / L of lithium hexafluoroborate;

[0057] In step 2, the electrolyte solution obtained in step 1 is added to a three-necked flask containing an organic solvent, calcium ions and rare earth ions, and continuously stirred;

[0058] Described organic solvent is made up of octadecene and oleic acid, and the volume ratio of octadecene and oleic acid is 4:1;

[0059] The concentration of the calcium ion in the organic solvent is 1.0mol / L;

[0060] The rare earth ions are composed of Er 3+ 、Tm 3+ and Yb 3+ Ionic composition, Er 3+ The concentration of ions in the organic solvent is 0.02mol / L, Tm 3+ The concentration of ions in the organic solvent...

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Abstract

The invention relates to a method for preparing an upconversion fluorescent material from waste lithium battery electrolyte. The method comprises the following steps of obtaining waste lithium battery electrolyte subjected to impurity removal; adding the waste lithium battery electrolyte into a three-necked flask containing an organic solvent, calcium ions and rare earth ions; after vacuum filling, introducing inert gas for protection; performing heating to a certain temperature; performing high-temperature calcination on the obtained product to obtain a lithium doped CaF2-based upconversion fluorescent material. The method has the advantages that the cost for resource utilization of the waste lithium battery electrolyte is low; the operation process is simple; fluorine ions and lithium ions in the electrolyte are utilized at high values; the obtained lithium doped CaF2-based upconversion fluorescent material has efficient upconversion fluorescent performance through the excitation of 980nm near-infrared light.

Description

technical field [0001] The invention belongs to the field of resource utilization of waste lithium battery electrolytes, and relates to a method for preparing up-conversion luminescent materials by using waste lithium battery electrolytes, in particular to a method for preparing lithium-doped CaF by using waste lithium battery electrolytes 2 A method for upconverting luminescent materials. Background technique [0002] In recent years, electronic products have been updated faster and faster, and lithium-ion batteries are the efficient power source of electronic products. But when these electronic products are scrapped, the environmental pollution problem of lithium-ion batteries has become more and more prominent. The electrolyte of lithium-ion batteries contains various organic solvents and electrolytes. Among them, organic solvents include ethylene carbonate, ethyl methyl carbonate, dimethyl carbonate, ethyl isopropyl carbonate, etc.; electrolytes are mainly lithium salt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/61H01M10/54
CPCY02W30/84C09K11/616H01M10/54
Inventor 朱南文黄寿强孙同华李良
Owner SHANGHAI JIAO TONG UNIV
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