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Aqueous zinc-ion battery positive electrode material

A technology of zinc ion battery and positive electrode material, applied in battery electrodes, electrode manufacturing, secondary batteries, etc., to achieve good electrical conductivity, improve electrical conductivity, and improve electrochemical performance.

Active Publication Date: 2018-03-30
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no information about Mn 3 o 4 As a research on the positive electrode of aqueous zinc-ion batteries, not to mention the construction of binder-free Mn that can greatly improve the electrochemical performance 3 o 4 cathode

Method used

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  • Aqueous zinc-ion battery positive electrode material
  • Aqueous zinc-ion battery positive electrode material
  • Aqueous zinc-ion battery positive electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1mmol KMnO 4 Add in 40ml of distilled water, stir at room temperature to obtain a dark purple solution, then transfer the resulting solution to an autoclave, and then add a piece of stainless steel mesh (2x3cm 2 ), water heating at 160°C for 24 hours, after cooling, the stainless steel mesh was washed several times, and then dried in an oven at 60°C. The trimanganese tetroxide material grown on the stainless steel mesh is obtained.

[0023] figure 1 (a) is the XRD spectrum of Example 1 of the present invention. As can be seen from the figure, except for the three peaks of stainless steel mesh, it is very good with Mn 3 o 4 correspond. figure 1 (b) Analysis studies the valence state of manganese, showing the 2p of Mn 3 / 2 and 2p 1 / 2 the peak position. figure 2 (a) is a scanning electron microscope picture of the trimanganese tetroxide material grown on the stainless steel net prepared in Example 1. It can be seen that it has uniform and closely arranged nano-curd...

Embodiment 2

[0027] 1mmol KMnO 4 Add in 40ml of distilled water, stir at room temperature to obtain a dark purple solution, then transfer the resulting solution to an autoclave, and then add a piece of stainless steel mesh (2x3cm 2 ), water heating at 160°C for 6 hours, after cooling, the stainless steel mesh was washed several times, and then dried in an oven at 60°C. Obtain the target product. Figure 4 It is the SEM picture of the material obtained in Example 2.

Embodiment 3

[0029] 1mmol KMnO 4 Add in 40ml of distilled water, stir at room temperature to obtain a dark purple solution, then transfer the resulting solution to an autoclave, and then add a piece of stainless steel mesh (2x3cm 2 ), at 160°C for 12 hours, and after cooling, the stainless steel mesh was washed several times, and then dried in an oven at 60°C. Obtain the target product. Figure 5 It is the SEM picture of the material obtained in Example 3.

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Abstract

The invention discloses an aqueous zinc-ion battery positive electrode material. A preparation method of the material is a one-step hydrothermal method and comprises the steps of adding a certain amount of potassium permanganate into deionized water, performing stirring under a room temperature to obtain a deep violet solution, transferring the solution into a high-pressure kettle, and adding a three-dimensional substrate material into the solution for hydrothermal solution; washing the three-dimensional substrate material for many times after cooling of hydrothermal solution, and performing drying in a baking oven to obtain a uniform nanometer flower spherical Mn3O4 material grown on the three-dimensional substrate material. The prepared material is initially applied to prepare the aqueous zinc-ion battery positive electrode material, has high specific capacity and favorable cycle stability, is moderate in reaction condition and simple in process and is suitable for production on a large scale.

Description

technical field [0001] The invention belongs to the technical field of high-energy water system zinc ion battery materials, and in particular relates to a novel water system zinc ion battery cathode material. Background technique [0002] Aqueous zinc ion battery is a new type of secondary battery that has emerged in recent years. It has high energy density, high power density, non-toxic battery materials, low price, and simple preparation process. It has high application value and Prospects. It is more attractive that zinc ions have a divalent charge, enabling the battery to provide higher storage capacity, and have high ionic conductivity using an environmentally friendly aqueous electrolyte. [0003] Among the positive electrode materials for water-based zinc-ion batteries currently used in research, manganese oxide is considered to be the most promising positive electrode material due to its large reserves, low price, low toxicity, and many valence states of manganese. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/50H01M4/70H01M4/74H01M4/80H01M10/36B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/0416H01M4/0471H01M4/50H01M4/70H01M4/745H01M4/808H01M10/36Y02E60/10
Inventor 周江梁叔全方国赵朱楚钰唐艳
Owner CENT SOUTH UNIV
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