Preparation method and application of high-performance sheet-like porous structure zinc ferrite anode material by using jarosite slag sulfuric acid leaching solution
A technology of negative electrode material and porous structure, applied in the field of negative electrode material of lithium ion battery, can solve the problems of occupying land resources, untimely recycling of jarosite slag, waste of resources, etc., to achieve reduced waste, good cycle stability and rate performance, preparation Effects with easily controlled conditions
Active Publication Date: 2020-10-09
GUILIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
If the alum slag is piled up for a long time and not recovered in time, it will occupy a large amount of land resources and the heavy metal elements in it will pollute the soil and groundwater, and on the other hand, it will cause a huge waste of resources
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[0020] (1) Determination of Zn in sulfuric acid leaching solution of ferosite slag 2+ and Fe 总 The amount concentration of the substance, where Zn 2+ The concentration of the substance is 0.045mol / L, Fe 总 The concentration of the substance is 0.12mol / L.
[0021] (2) Add 100mL distilled water to 100mL step (1) gained jarosite slag sulfuric acid leaching liquid, adjust the Fe in the solution 总 The concentration of the substance is 0.06mol / L, then add 0.4635g of zinc sulfate heptahydrate, ultrasonically dissolve, so that Zn in the solution 2+ with Fe 总 The molar ratio is 1:2.
[0022] (3) Weigh 12.00g of anhydrous sodium carbonate, measure 120mL of distilled water, mix and dissolve to prepare a sodium carbonate solution, and transfer the prepared solution to a 250mL constant pressure separatory funnel for use.
[0023] (4) Put 200mL of the solution obtained in step (2) into a 500mL flask, and slowly add 120mL of the solution obtained in step (3) dropwise to the beaker throu...
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Abstract
The invention discloses a method for preparing a high-performance flaky porous structured zinc ferrite anode material by using a jarosite residue sulfate leaching solution and application thereof. Bydirectly using the jarosite residue sulfate leaching solution as the raw material and adding a zinc source to adjust the molar ratio of zinc to iron to 1:2, the high-performance flaky porous structured zinc ferrite anode material is prepared. The prepared high-performance flaky porous structured zinc ferrite anode material can be applied to preparation of high-performance lithium ion batteries. Byhigh-value utilization of the zinc source and the iron source in the jarosite residue, waste of resources and environmental pollution are reduced. Meanwhile, preparation conditions of the method areeasy to control, and thus the method is suitable for large-scale production. The prepared nanometer zinc ferrite has good cyclic stability and rate performance as an anode material for lithium-ion batteries.
Description
technical field [0001] The invention relates to the technical field of negative electrode materials for lithium-ion batteries, in particular to a method for preparing a high-performance sheet-like porous structure zinc ferrite negative electrode material by utilizing the sulfuric acid leaching solution of ferrite slag. [0002] technical background [0003] At present, 80% of the world's zinc is produced by hydrometallurgy. In the process of zinc hydrometallurgy, in order to separate zinc and iron, the ferrite method is usually used to remove iron. A large amount of iron slag, that is, alum slag, will be produced in the process of iron removal by the iron vitriol method. In addition to more than 25% Fe, the jarosite slag also contains about 10% Zn and traces of Pb, Cu, Cd, Sb, In, Sn, Ag, As and other elements. Since it is difficult to meet the requirements of the ironmaking process, many zinc smelters directly send it to the slag yard for stacking. If the alum slag is pil...
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IPC IPC(8): C01G49/00H01M4/58H01M10/0525
CPCC01G49/0081C01P2002/72C01P2004/03C01P2006/40H01M4/5825H01M10/0525Y02E60/10
Inventor 姚金环严靖李延伟
Owner GUILIN UNIVERSITY OF TECHNOLOGY