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Method for preparing aluminum battery positive electrode material by using MOF induced metal selenide

A technology of metal selenides and induced metals, applied in the direction of metal selenides/tellurides, battery electrodes, active material electrodes, etc., can solve the problems of structural collapse, easy dissolution, etc., and achieve the effect of increasing intercalation and extraction, and excellent energy density

Pending Publication Date: 2020-05-19
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method of using MOF to induce metal selenide to prepare aluminum battery positive electrode materials, so as to solve the problems that existing metal selenide positive electrode materials are easy to dissolve and have structural collapse.

Method used

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  • Method for preparing aluminum battery positive electrode material by using MOF induced metal selenide
  • Method for preparing aluminum battery positive electrode material by using MOF induced metal selenide
  • Method for preparing aluminum battery positive electrode material by using MOF induced metal selenide

Examples

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Effect test

Embodiment 1

[0030] 1. Dissolve 1 mmol of zinc nitrate in 30 mL of methanol solution, and obtain solution A under strong magnetic stirring; dissolve 10 mmol of 1-methylimidazole in 10 mL of methanol solution, and under strong magnetic stirring, Solution B was obtained; then solutions A and B were thoroughly mixed, stirred and left to stand for 12 h. Then it was centrifuged and washed three times with deionized water and absolute ethanol, and finally it was dried in a vacuum oven at 80 °C to obtain the MOF-induced ZnSe precursor. Its scanning electron microscope picture is as figure 1 shown.

[0031] 2. Fully grind the MOF-induced ZnSe precursor and selenium powder in a mortar according to the mass ratio of 1:2 to make it evenly mixed, and then put the mixture under N 2 Calcined at 300 °C for 2 h in a protective atmosphere. Finally, cool down to room temperature with the furnace to obtain a black solid powder, which is the target product ZnSe active material. Its scanning electron micro...

Embodiment 2

[0035] 1. Dissolve 1 mmol of cobalt nitrate in 30 mL of methanol solution, and obtain solution A under strong magnetic stirring; dissolve 10 mmol of 1-methylimidazole in 30 mL of methanol solution, and under strong magnetic stirring, Solution B was obtained; finally, solutions A and B were fully mixed, stirred and allowed to stand for 24h. Then it was centrifuged and washed three times with deionized water and absolute ethanol, and finally dried in a vacuum oven at 80 °C to obtain MOF-induced CoSe 2 Precursor. Its scanning electron microscope picture is as Image 6 shown.

[0036] 2. CoSe induced by MOF 2 Precursor and selenium powder are fully ground in mortar according to mass ratio 1:2, make it mix evenly, then its mixture is in N 2 Calcined at 500 °C for 3 h in a protective atmosphere. Finally, cool down to room temperature with the furnace to obtain a black solid powder as the target product CoSe 2 active material. Its scanning electron microscope picture is as F...

Embodiment 3

[0040]1. Dissolve 1 mmol of copper nitrate in 40 mL of methanol solution, and obtain solution A under strong magnetic stirring; dissolve 10 mmol of 2-methylimidazole in 30 mL of methanol solution, and under strong magnetic stirring, Solution B was obtained; finally, solutions A and B were thoroughly mixed, stirred and allowed to stand for 12 h. Then it was centrifuged and washed three times with deionized water and absolute ethanol, and finally it was dried in a vacuum oven at 80 °C to obtain the MOF-induced CuSe precursor.

[0041] 2. Fully grind the MOF-induced CuSe precursor and selenium powder in a mortar according to the mass ratio of 1:1 to make them evenly mixed, and then put the mixture in N 2 Calcined at 400 °C for 2 h in a protective atmosphere. Finally, cool down to room temperature with the furnace to obtain a black solid powder, which is the target product CuSe active material.

[0042] 3. Mix CuSe active material, carbon black and polytetrafluoroethylene binder...

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Abstract

The invention provides a method for preparing an aluminum battery positive electrode material by using MOF induced metal selenide. The method comprises the following steps: (a) dissolving metal nitrate into a solvent to obtain a solution A, dissolving imidazole organic matters into a solvent to obtain a solution B, and then, uniformly mixing the solution A and the solution B, and carrying out standing, centrifuging, washing and drying to obtain a precursor; (b) uniformly mixing the precursor and a selenium source, and then, carrying out calcining to obtain a metal selenide active material; and(c) taking the metal selenide active material as a positive electrode, and assembling the metal selenide active material into the aluminum secondary battery. The multiple nano cage-shaped structuresare good in stability, so that dissolution of metal elementary substances, selenium and selenide is avoided; and intercalation and deintercalation of aluminum ions and polyaluminum anions are increased, so that excellent energy density is shown in the aluminum battery positive electrode material, and a foundation is laid for commercialization of aluminum batteries.

Description

technical field [0001] The invention relates to the technical field of preparation of positive electrode materials for aluminum batteries, in particular to a method for preparing positive electrode materials for aluminum batteries by using MOF to induce metal selenides. Background technique [0002] The development of efficient energy storage systems is an urgent need in modern society. The inherent intermittency of renewable energy sources such as wind and solar forces increases the complexity of the entire grid operation system. Therefore, the development of reliable, low-cost, high-efficiency, and environmentally friendly electrochemical battery storage is the only way to achieve the miniaturization of power systems. The widespread production and use of lithium-ion batteries has led to a sharp rise in the price of lithium resources over the past few decades. From the strategic perspective of sustainable development, it is imperative to develop a low-cost, high-safety, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M10/054C01B19/04
CPCH01M4/581H01M10/054C01B19/007H01M2004/028C01P2002/72C01P2004/03Y02E60/10
Inventor 李战雨李笑笑
Owner HEBEI UNIVERSITY
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