Preparation method for zinc manganate negative electrode material

Patent metadata

Field	Value
Publication number	US-12157676-B2
Application number	US-202218558328-A
Country	US
Kind code	B2
Filing date	Aug 25, 2022
Priority date	Nov 24, 2021
Publication date	Dec 3, 2024
Grant date	Dec 3, 2024

Abstract

A method for preparing a zinc manganate anode material is disclosed. The method includes the following steps: (1) preparing a solution A containing a manganese ion and a solution B containing zinc alkali; (2) dispersing an adsorption carrier into the solution B; (3) using an alkali solution as a base solution and adding the solution A, the solution B and an oxidant solution to the base solution while stirring; (4) conducting a solid-liquid separation of the materials after reaction to obtain a solid; and (5) washing, drying and calcining the solid to obtain a zinc manganate anode material.

First claim

The invention claimed is:

1. A method for preparing a zinc manganate anode material, comprising the following steps:
(1) preparing a solution A containing a manganese ion and a solution B;
(2) dispersing an adsorption carrier into the solution B;
(3) using an alkali solution as a base solution and adding the solution A, the solution B and an oxidant solution to the base solution while stirring;
(4) conducting a solid-liquid separation on a material after reaction to obtain a solid; and
(5) washing, drying and calcining the solid to obtain the zinc manganate anode material;
wherein in step (1), the solution A further contains a silver ion, and the solution B is a mixed solution of sodium tetrahydroxozincate and sodium hydroxide;
wherein in step (2), the adsorption carrier is cotton fiber;
wherein in step (3), a reaction vessel used for the stirring is provided with an overflow pipe and connected with a collection tank through the overflow pipe;
wherein in step (5), the calcining comprises: heating the solid after drying to 250° C. to 300° C. at a heating rate of 1° C./min to 3° C./min for 1 h to 2 h, then heating the solid to 500° C. to 600° C. at a heating rate of 2° C./min to 5° C./min for 2 h to 4 h.

2. The method for preparing the zinc manganate anode material of claim 1 , wherein a ratio of a mass of the adsorption carrier to a volume of the solution B is (25-100) g:1 L.

3. The method for preparing the zinc manganate anode material of claim 1 , wherein in step (1), the manganese ion in the solution A has a molar concentration of 0.1 mol/L to 2.0 mol/L and a molar concentration ratio of the manganese ion to the silver ion in the solution A is 100:0.8-4.

4. The method for preparing the zinc manganate anode material of claim 1 , wherein in step (1), a zinc ion in the solution B has a concentration of 0.05 mol/L to 1.0 mol/L and a hydroxide ion has a concentration of 0.33 mol/L to 6.1 mol/L.

5. The method for preparing the zinc manganate anode material of claim 1 , wherein in step (3), the base solution has a pH of 10.5 to 11.8, a pH in a reactor is adjusted by the oxidant solution such that the pH in the reactor is always maintained at 10.5 to 11.8.

6. The method for preparing the zinc manganate anode material of claim 5 , wherein the oxidant solution is a hydrogen peroxide solution.

Assignees

• Guangdong Brunp Recycling Technology Co Ltd
• Hunan Brunp Recycling Tech Co Ltd
• Hunan Brunp Ev Recycling Co Ltd

Inventors

• Yu Haijun
• Xie Yinghao
• Li Aixia
• Zhang Xuemei
• Li Changdong

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M10/054

  Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M4/505

  of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title

• C01G45/1235 Primary

  of the type (Mn2O4)2-, e.g. Li2Mn2O4 or Li2(MxMn2-x)O4 · CPC title