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Preparation method of Mn2O3/Mn3O4 composite electrode material for aqueous zinc ion battery

A zinc-ion battery and composite electrode technology, applied in battery electrodes, positive electrodes, secondary batteries, etc., can solve the problems of long synthesis time, harsh conditions, complicated steps, etc., and achieve easy control of preparation conditions and good cycle stability and the effect of rate performance

Pending Publication Date: 2022-03-25
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation methods of manganese-based oxides are: hydrothermal method, precipitation method, KMnO 4 Reduction method, etc., but most of the preparation methods have the disadvantages of complicated steps, harsh conditions, long synthesis time, and high cost.

Method used

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  • Preparation method of Mn2O3/Mn3O4 composite electrode material for aqueous zinc ion battery
  • Preparation method of Mn2O3/Mn3O4 composite electrode material for aqueous zinc ion battery
  • Preparation method of Mn2O3/Mn3O4 composite electrode material for aqueous zinc ion battery

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) According to Mn 2+ The molar ratio of sucrose and sucrose is 1:0.8, and the ratio of manganese chloride tetrahydrate (MnCl 2 4H 2 O) 1.98g and sucrose (C 12 h 22 o 11 ) 2.74 g and mixed, then 5 mL of deionized water was added to the mixture and the mixture was completely dissolved with the aid of ultrasound.

[0018] (2) Transfer the mixed solution obtained in step (1) to a crucible and place it in a muffle furnace, heat it from room temperature to 600°C at a heating rate of 5°C / min under an air atmosphere, and keep it at 600°C for 3 Hours, get manganese trioxide / trimanganese tetraoxide (Mn 2 o 3 / Mn 3 o 4 ) composite electrode material.

Embodiment 2

[0020] (1) According to Mn 2+ The molar ratio of sucrose and sucrose is 1:1, respectively weigh manganese chloride tetrahydrate (MnCl 2 4H 2 O) 1.98g and sucrose (C 12 h 22 o 11 ) 3.42 g and mixed, then 5 mL of deionized water was added to the mixture and the mixture was completely dissolved with the aid of ultrasound.

[0021] (2) Transfer the mixed solution obtained in step (1) to a crucible and place it in a muffle furnace, heat it from room temperature to 600°C at a heating rate of 5°C / min under an air atmosphere, and keep it at 600°C for 3 Hours, get manganese trioxide / trimanganese tetraoxide (Mn 2 o 3 / Mn 3 o 4 ) composite electrode material.

Embodiment 3

[0023] (1) According to Mn 2+ The molar ratio of sucrose and sucrose was 1:2, respectively weighed manganese chloride tetrahydrate (MnCl 2 4H 2 O) 1.98g and sucrose (C 12 h 22 o 11 ) 6.84 g and mixed, then 5 mL of deionized water was added to the mixture and the mixture was completely dissolved with the aid of ultrasound.

[0024] (2) Transfer the mixed solution obtained in step (1) to a crucible and place it in a muffle furnace, heat it from room temperature to 600°C at a heating rate of 5°C / min under an air atmosphere, and keep it at 600°C for 3 Hours, get manganese trioxide / trimanganese tetraoxide (Mn 2 o 3 / Mn 3 o 4 ) composite electrode material.

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Abstract

The invention discloses a method for preparing a Mn2O3 / Mn3O4 composite electrode material for an aqueous zinc ion battery. The preparation method comprises the following steps: (1) mixing manganese chloride tetrahydrate (MnCl2. 4H2O) and cane sugar (C12H22O11) according to a certain molar ratio, and completely dissolving by using deionized water under an ultrasonic-assisted condition; and (2) directly sintering the obtained mixed solution in a muffle furnace at 600 DEG C for 3 hours to obtain the Mn2O3 / Mn3O4 composite electrode material. The method disclosed by the invention is very simple, convenient and efficient, the preparation conditions are easy to control, the method is very suitable for large-scale production, and the prepared Mn2O3 / Mn3O4 composite material has relatively good cycling stability and rate capability when being used as an aqueous zinc ion battery positive electrode material.

Description

technical field [0001] The invention belongs to the technical field of chemical power sources, in particular to a kind of Mn 2 o 3 / Mn 3 o 4 Preparation method of composite electrode material. Background technique [0002] Today, lithium-ion batteries have become a necessity in people's lives. However, lithium is expensive, has limited reserves, and there are potential safety hazards in organic electrolytes. Therefore, researchers have turned their attention to Na, K, Zn, Mg and other relatively cheap and abundant aqueous metal ion batteries. Among these aqueous metal-ion batteries, aqueous Zn-ion batteries have received more attention from researchers because of their higher theoretical capacity (820mAh / g) and lower oxidation potential (-0.76V vs. standard hydrogen electrode) as zinc anodes. focus on. The positive electrode materials that match the zinc negative electrode mainly include vanadium-based oxides, manganese-based oxides, and Prussian blue analogues. Among...

Claims

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Application Information

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IPC IPC(8): C01G45/02H01M4/36H01M4/50H01M10/36
CPCC01G45/02H01M4/362H01M4/50H01M10/36H01M2004/028C01P2002/72C01P2004/03C01P2006/40C01P2004/80Y02E60/10
Inventor 姚金环刘颖李延伟毛芳芳
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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