A method for preparing highly active ternary metal oxide oxygen evolution catalyst by using waste ternary nickel-cobalt lithium manganese oxide

A technology of nickel cobalt lithium manganate and ternary metal, applied in the field of waste resource utilization and catalytic chemistry, can solve problems such as recycling and disposal, and achieve the effects of simple production process, controllable process and mild reaction conditions

Active Publication Date: 2021-10-26
派尔森环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with its extensive use and the limitation of its service life, decommissioned lithium-ion batteries will inevitably face the problem of recycling and disposal.

Method used

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  • A method for preparing highly active ternary metal oxide oxygen evolution catalyst by using waste ternary nickel-cobalt lithium manganese oxide
  • A method for preparing highly active ternary metal oxide oxygen evolution catalyst by using waste ternary nickel-cobalt lithium manganese oxide
  • A method for preparing highly active ternary metal oxide oxygen evolution catalyst by using waste ternary nickel-cobalt lithium manganese oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A method for preparing a highly active ternary metal oxide oxygen evolution catalyst by using waste ternary nickel-cobalt lithium manganese oxide is carried out in sequence according to the following steps:

[0044] (11) Sieve the ternary nickel-cobalt lithium manganate positive electrode material (containing nickel, cobalt, and manganese) in the discarded lithium-ion battery after crushing, take the under-sieve, grind the under-sieve into powder, and pass through 400 mesh Sieve, soak in 3M dilute hydrochloric acid for 10 hours, take the supernatant and record it as A;

[0045] (12) Add a certain amount of sodium hydroxide solution to A until the pH value of the solution is 7 to obtain B;

[0046] (13) Add cetyltrimethylammonium bromide 8g / L to B to obtain C;

[0047] (14) Put copper foam (thickness 0.01cm) with a diameter of 1cm×1cm into C, use copper foam as the working electrode, and use C as the reaction solution, soak the foam copper on the surface of the C soluti...

Embodiment 2

[0051] A method for preparing a highly active ternary metal oxide oxygen evolution catalyst by using waste ternary nickel-cobalt lithium manganese oxide is carried out in sequence according to the following steps:

[0052] (21) Sieve the discarded ternary nickel-cobalt lithium manganate cathode material after crushing, take the undersieve, grind the undersieve into powder, pass through a 400-mesh sieve, soak in 4M dilute hydrochloric acid for 15 hours, and take the supernatant The liquid is marked as A;

[0053] (22) Add a certain amount of sodium hydroxide solution to A until the pH value of the solution is 7 to obtain B;

[0054] (23) Add cetyltrimethylammonium bromide 16g / L to B to obtain C;

[0055] (24) Put copper foam (thickness 0.01cm) with a diameter of 1cm×1cm into C, take foam copper as the working electrode, and C as the reaction solution, soak the foam copper on the surface of the C solution, and at the same time treat the foam in an oxygen atmosphere Copper is s...

Embodiment 3

[0059] A method for preparing a highly active ternary metal oxide electrocatalyst by using waste ternary nickel-cobalt lithium manganese oxide is carried out in sequence according to the following steps:

[0060] (31) Sieve the waste ternary nickel-cobalt lithium manganate positive electrode material after crushing, take the undersieve, grind the undersieve into powder, pass through a 400-mesh sieve, soak in 6M dilute hydrochloric acid for 12 hours, and take the supernatant The liquid is marked as A;

[0061] (32) Add a certain amount of sodium hydroxide solution to A until the pH value of the solution is 7 to obtain B;

[0062] (33) Add cetyltrimethylammonium bromide 10g / L to B to obtain C;

[0063] (34) Put copper foam with a diameter of 1cm×1cm (thickness 0.01cm) into C, use copper foam as the working electrode, and use C as the reaction solution, soak the foamed copper on the surface of the C solution, and at the same time treat the foam in an oxygen atmosphere Copper is...

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Abstract

The invention discloses a method for preparing a highly active ternary metal oxide oxygen evolution catalyst by using waste ternary nickel cobalt lithium manganate. Make powder, soak it in dilute hydrochloric acid, take the supernatant and record it as A; (2) Add NaOH solution to A until the solution is neutral to obtain B; (3) Add hexadecyl trimethyl to B Ammonium bromide to get C; (4) Put copper foam into C, use the copper foam as the working electrode and C as the reaction solution, soak the copper foam on the surface of the solution C, and discharge the copper foam plasma in an oxygen atmosphere to make the The chemical reaction occurs rapidly on the surface; (5) the above-mentioned self-supporting electrode is washed and then dried to obtain a highly active ternary metal oxide oxygen evolution catalyst. The method of the invention is simple, the conditions are mild, and the high-activity oxygen evolution catalyst can be rapidly prepared.

Description

technical field [0001] The invention belongs to the field of waste resource utilization and catalytic chemistry, and relates to a preparation method for an oxygen evolution catalyst applied to electrolysis of water, in particular to a method for preparing a highly active ternary metal oxide oxygen evolution catalyst by utilizing waste ternary nickel-cobalt lithium manganate method. Background technique [0002] Water electrolysis is of great significance in the production of clean energy. In recent years, as a half-reaction of water electrolysis, the hydrogen evolution reaction (HER) has developed rapidly; however, the other half-reaction, the oxygen evolution reaction (OER), has been constrained by its slow kinetics due to its complex four-electron process. The bottleneck of the overall efficiency of the water electrolysis reaction. For a long time, electrocatalysts with high oxygen evolution activity are usually noble metal Ir, Ru-based materials. However, the rarity of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/093C25B1/04
CPCC25B1/04Y02E60/36
Inventor 李虎林李毅蔡建荣杜佳郑成王宇魏海滨杨霄
Owner 派尔森环保科技有限公司
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